2021/09/21 更新

写真a

ザキナビホアハメド ザハラン
ZakiNabeihAhmed Zahran
ZakiNabeihAhmed Zahran
所属
教育研究院 自然科学系 特任准教授
工学部 特任准教授
職名
特任准教授
外部リンク

学位

  • 博士 ( 2008年7月   オクラホマ大学 )

研究キーワード

  • Water Oxidation

  • Carbon dioxide reduction

  • Molecular complexes

  • Semiconductor photoanodes and photocathodes

  • Metal Oxides

研究分野

  • ナノテク・材料 / 無機物質、無機材料化学  / Artificial Photosynthesis

経歴

  • 新潟大学   工学部   特任准教授

    2018年4月 - 現在

 

論文

  • Critical Hammett Electron-Donating Ability of Substituent Groups for Efficient Water Oxidation Catalysis by Mononuclear Ruthenium Aquo Complexes 査読

    Watabe Shunsuke, Tanahashi Yuki, Hirahara Masanari, Yamazaki Hirosato, Takahashi Kosuke, Mohamed Eman A, Tsubonouchi Yuta, Zahran Zaki N, Saito Kenji, Yu Tatsuto, Yagi Masayuki

    INORGANIC CHEMISTRY   58 ( 19 )   12716 - 12723   2019年10月

  • Characterization and mechanism of efficient visible-light-driven water oxidation on an in situ N2-intercalated WO3 nanorod photoanode 査読

    ザハラン ザキナビハアハメド

    ACS Sustainable Chemistry & Engineering   2019年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    添付ファイル: acssuschemeng.9b04467.pdf

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  • Critical Hammett Electron-Donating Ability of Substituent Groups for Efficient Water Oxidation Catalysis by Mononuclear Ruthenium Aquo Complexes 査読

    ザハラン ザキナビハアハメド

    Inorganic chemistry   58 ( 19 )   12716 - 12723   2019年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    添付ファイル: acs.inorgchem.9b01623.pdf

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  • Recent Advances in the Development of Molecular Catalyst‐Based Anodes for Water Oxidation toward Artificial Photosynthesis 査読

    ザハラン ザキナビハアハメド

    ChemSusChem   12 ( 9 )   1775 - 1793   2019年5月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1002/cssc.201802795

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  • Efficient Solar‐Assisted O2 Reduction Using a Cofacial Iron Porphyrin Dimer Catalyst Integrated into a p‐CuBi2O4 Photocathode 査読

    ザハラン ザキナビハアハメド

    Chemistry–A European Journal   24 ( 42 )   10606 - 10611   2018年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1002/chem.201704143

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  • Efficient Photoelectrochemical O2 and CO Production Using BiVO4 Water Oxidation Photoanode and CO2 Reduction Au Nanoparticle Cathode Prepared by In Situ Deposition from Au3+ Containing Solution 査読

    ザハラン ザキナビハアハメド

    Advanced Sustainable Systems   1 ( 11 )   1700111   2017年11月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1002/adsu.201700111

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  • Enhanced Performance of Pristine Ta3N5 Photoanodes for Solar Water Splitting by Modification with Fe–Ni–Co Mixed-Metal Oxide Cocatalysts 査読

    ザハラン ザキナビハアハメド

    The Journal of Physical Chemistry C   121 ( 37 )   20093 - 20100   2017年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1021/acs.jpcc.7b04403

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  • Electrocatalytic water oxidation at low energy cost by a highly active and robust calcium-manganese oxide thin film sintered on an FTO electrode with ethyl methyl imidazolium triflate ionic liquid 査読

    Zaki N. Zahran, Eman A. Mohamed, Yoshinori Naruta

    JOURNAL OF MATERIALS CHEMISTRY A   5 ( 29 )   15167 - 15174   2017年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ROYAL SOC CHEMISTRY  

    We report a simple and novel method involving an ethyl methyl imidazolium triflate ionic liquid (EMI OTf) to prepare highly mechanically stable crystalline alpha-Mn2O3 and calcium-incorporated manganese oxide (CaMn-oxide) thin film water oxidation electrocatalysts (WOCs) on a fluorine-doped tin oxide (FTO) electrode (FTO/EMI alpha-Mn2O3 and FTO/EMI CaMn-oxide). Electrochemical measurements showed that the incorporation of calcium into manganese oxide promotes water oxidation at a very low energy cost, similar to that observed in natural photosystem II (PSII). The low energy cost is due to the involvement of the Mn-IV=O species in the catalysis as compared to the Mn-V=O species that has been previously detected in calcium-free alpha-Mn2O3. Moreover, the FTO/EMI CaMn-oxide electro-catalyst showed unprecedentedly high activity (TOF approximate to 29.8 s(-1) at eta = 0.57 V) and robustness (tested for 40 h) for water oxidation in a neutral potassium phosphate (KPi) buffer solution (0.1 M, pH 7.0). The mechanism of water oxidation by FTO/EMI CaMn-oxide was discussed and applied for water oxidation by the mu-oxido-CaMn4O5 cluster of photosystem II (PS II).

    DOI: 10.1039/c7ta03665e

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  • Covalent bonds immobilization of cofacial Mn porphyrin dimers on an ITO electrode for efficient water oxidation in aqueous solutions 査読

    Eman A. Mohamed, Zaki N. Zahran, Yoshinori Naruta

    JOURNAL OF CATALYSIS   352   293 - 299   2017年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ACADEMIC PRESS INC ELSEVIER SCIENCE  

    We previously reported several manganese porphyrin dimers as the first manganese-containing molecular catalysts for water oxidation, however, in non-aqueous CH3CN solution containing 5% H2O. Here, we successfully fabricated these dimers with mono- and hexaphosphonic acid groups, Mn2DP-PO3H2 and Mn2DP-(PO3H2)(6), to covalently assemble them on the surface of ITO electrode (ITO = indium-doped tin oxide) and use the Mn2DP-PO3H2 and Mn2DP-(PO3H2)(6)vertical bar ITO assemblies as heterogeneous catalysts for electrochemical water oxidation in aqueous buffer solutions. The mono-phosphonic acid fabricated assemblies showed unprecedent high turnover frequencies (TOFs) (up to 44.9 s(-1)) at a low overpotential (eta= 0.47 V) in a neutral buffer solution. In acidic buffered solutions (pH = 1.5), they showed higher TOFs (up to 47.4 s(-1)) at a very low overpotential (eta = 0.26 V). The robustness of the mono-phosphonic acid fabricated catalysts, Mn2DP-PO3H2 vertical bar ITO, was tested at a high overpotential (eta = 0.80 V). Although they showed an oxygen evolution with 178.3 s(-1) TOF, the oxygen evolution completely stopped after 11 h electrolysis. UV-vis spectra monitored during the electrolysis clearly indicated the gradual detachment of the catalysts from the ITO surface is likely the main reason of stopping the oxygen evolution. The hexa-phosphonic acid catalyst assembly, Mn2DP-(PO3N2)(6)vertical bar ITO, however, showed a continuous oxygen evolution without stopping even after 23 h of electrolysis with 199.3 s(-1) TOF. Tafel plots in different pHs give insights on the mechanism of H2O oxidation. (C) 2017 Elsevier Inc. All rights reserved.

    DOI: 10.1016/j.jcat.2017.05.018

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  • Efficient Heterogeneous CO2 to CO Conversion with a Phosphonic Acid Fabricated Cofacial Iron Porphyrin Dimer 査読

    ザハラン ザキナビハアハメド

    Chemistry of Materials   29 ( 17 )   7140 - 7150   2017年8月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Simple preparation of highly active water splitting FTO/BiVO4 photoanode modified with tri-layer water oxidation catalysts 査読

    Eman A. Mohamed, Zaki N. Zahran, Yoshinori Naruta

    JOURNAL OF MATERIALS CHEMISTRY A   5 ( 15 )   6825 - 6831   2017年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ROYAL SOC CHEMISTRY  

    A colloidal BiVO4 solution, prepared from equimolar mixing of Bi(NO3)(3)center dot 5H(2)O and NH4VO3 in MeOH containing 15% (v/v) 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMI triflate) ionic liquid, was coated on a fluorine-doped tin oxide conducting glass (FTO) with a doctor blade technique; itwas sintered at 450 degrees C for 2 h to produce a super highly mechanically stable film of nanocrystalline scheelite-monoclinic, s-m BiVO4 photoanode. This technique endowed an excellent solar-driven water splitting activity for both the bare photoanode and that modified with tri-layers of non-precious water oxidation catalysts. The presence of EMI triflate in the precursor solution is essential for the mechanical stability of the film. Moreover, carbon, nitrogen, and oxygen of the EMI triflate were left over in the resulting film, and they did not affect its crystalline phase.

    DOI: 10.1039/c7ta00156h

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  • Kinetics and Mechanism of Heterogeneous Water Oxidation by alpha-Mn2O3 Sintered on an FTO Electrode 査読

    Zaki N. Zahran, Eman A. Mohamed, Yoshinori Naruta

    ACS CATALYSIS   6 ( 7 )   4470 - 4476   2016年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    Kinetic studies of heterogeneous water oxidation by an alpha-Mn2O3/FTO electrocatalyst in nonaqueous (CH3CN/0.1 M n-Bu4NPF6 and DMF/0.1 M n-Bu4NPF6) and aqueous 0.1 M KPi (pH 7.0) solutions showed that the rate of water oxidation is first order in catalyst concentration and in H2O concentration. The square wave and cyclic voltammetry measurements reveal the stepwise proton-coupled electron transfer (PCET) oxidations of the active Mn-II-OH2 site to Mn-III-OH and then to Mn-IV=O and finally an electron transfer oxidation of Mn-IV=O to Mn-V=O species. The Mn-V=O species undergoes a rate-limiting O atom transfer to H2O to give a Mn-III-OOH2 species that, in turn, undergoes further oxidations to release O-2.

    DOI: 10.1021/acscatal.6b00413

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  • Kinetics and Mechanism of Heterogeneous Water Oxidation by α-Mn2O3 Sintered on an FTO Electrode 査読

    ザハラン ザキナビハアハメド

    ACS Catalysis   6 ( 7 )   4470 - 4476   2016年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Bio-inspired cofacial Fe porphyrin dimers for efficient electrocatalytic CO2 to CO conversion: Overpotential tuning by substituents at the porphyrin rings 査読

    ザハラン ザキナビハアハメド

    Scientific reports   6   24533   2016年4月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Electrocatalytic Water Oxidation by a Highly Active and Robust -Mn2O3 Thin Film Sintered on a Fluorine-Doped Tin Oxide Electrode 査読

    Zaki N. Zahran, Eman A. Mohamed, Takehiro Ohta, Yoshinori Naruta

    CHEMCATCHEM   8 ( 3 )   532 - 535   2016年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:WILEY-V C H VERLAG GMBH  

    As a water oxidation catalyst, -Mn2O3 has higher activity than other manganese oxides. However, the robustness of the catalyst supported on conducting electrodes has only been tested for a short time (1h) and it shows a gradual decrease in activity. Furthermore, the turnover number (TON) and turnover frequency (TOF) have not been reported. Herein, we optimized the preparation of transparent nanocrystalline -Mn2O3 on a fluorine-doped tin oxide (FTO) electrode, and this resulting catalyst shows, in neutral aqueous 0.1m potassium phosphate buffer solution, a high electrocatalytic water oxidation activity with a TON of 230, a TOF of 5.3x10(-3)s(-1) based on the all-Mn content, and a TOF of 2.1s(-1) based on the amount of surface-active Mn with a Faradic efficiency of 96.7% at an overpotential of 470mV. The robustness of the -Mn2O3/FTO electrocatalyst was tested for a long time (80h) without a decrease in activity.

    DOI: 10.1002/cctc.201501073

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  • Electrocatalytic water oxidation at low energy cost by a highly active and robust calcium–manganese oxide thin film sintered on an FTO electrode with ethyl methyl imidazolium triflate ionic liquid 査読

    ザハラン ザキナビハアハメド

    ChemCatChem   8 ( 3 )   532 - 535   2016年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Efficient electrocatalytic CO2 reduction with a molecular cofacial iron porphyrin dimer 査読

    Eman A. Mohamed, Zaki N. Zahran, Yoshinori Naruta

    CHEMICAL COMMUNICATIONS   51 ( 95 )   16900 - 16903   2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ROYAL SOC CHEMISTRY  

    A cofacial iron tetraphenyl porphyrin dimer, o-Fe2DTPP, bio-inspired by the Ni-Fe containing metalloenzyme, carbon monoxide dehydrogenase (CODH), efficiently and selectively catalyses the electrochemical reduction of CO2 to CO in DMF/10% H2O solution at the electro-generated Fe-0(por) species with high Faradic efficiency (95%) and TOF (4300 s(-1)) at a moderate overpotential, eta = 0.66 V.

    DOI: 10.1039/c5cc04273a

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  • Effects of temperature of heat treatment on surface nano-structure of Ti metal electrode formed by alkali, acid and heat treatments 査読

    ザハラン ザキナビハアハメド

    ICEAS 1331   841 - 844   2012年

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    記述言語:英語   掲載種別:研究論文(国際会議プロシーディングス)  

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  • Bis (1-methyl-1H-imidazole-κN3)[N, N′-o-phenylenebis (pyridine-2-carboxamido)-κ4N] manganese (II) 査読

    ザハラン ザキナビハアハメド

    Acta Crystallographica Section E   65 ( 1 )   m75 - m75   2009年1月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Crystal structures of manganese- and cobalt-substituted myoglobin in complex with NO and nitrite reveal unusual ligand conformations 査読

    Zaki N. Zahran, Lilian Chooback, Daniel M. Copeland, Ann H. West, George B. Richter-Addo

    JOURNAL OF INORGANIC BIOCHEMISTRY   102 ( 2 )   216 - 233   2008年2月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ELSEVIER SCIENCE INC  

    Nitrite is now recognized as a storage pool of bioactive nitric oxide (NO). Hemoglobin (Hb) and myoglobin (Mb) convert, under certain conditions, nitrite to NO. This newly discovered nitrite reductase activity of Hb and Mb provides an attractive alternative to mammalian NO synthesis from the NO synthase pathway that requires dioxygen. We recently reported the X-ray crystal structure of the nitrite adduct of ferric horse heart Mb, and showed that the nitrite ligand binds in an unprecedented O-binding (nitrito) mode to the d(5) ferric center in Mb(III)(ONO) [D.M. Copeland, A. Soares, A.H. West, G.B. Richter-Addo, J. Inorg. Biochem. 100 (2006) 1413-1425]. We also showed that the distal pocket in Mb allows for different conformations of the NO ligand (120 degrees and 144 degrees) in Mb(II)NO depending on the mode of preparation of the compound. In this article, we report the crystal structures of the nitrite and NO adducts of man ganese-substituted hh Mb (a d(4) system) and of the nitrite adduct of cobalt-substituted hh Mb (a d(6) System). We show that the distal His64 residue directs the nitrite ligand towards the rare nitrito O-binding mode in Mn(III)Mb and Co(III)Mb. We also report that the distal pocket residues allow a stabilization of an unprecendented bent MnNO moiety in Mn(II)MbNO. These crystal structural data, when combined with the data for the aquo, methanol, and azide MnMb derivatives, provide information on the role of distal pocket residues in the observed binding modes of nitrite and NO ligands to wild-type and metal-substituted Mb. (c) 2007 Elsevier Inc. All rights reserved.

    DOI: 10.1016/j.jinorgbio.2007.08.002

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  • A bioinorganic approach to the study of the interactions of nitrogen oxides with manganese porphyrins and manganese-and cobalt-reconstituted myoglobin. 査読

    ザハラン ザキナビハアハメド

    2007年

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    記述言語:英語   掲載種別:学位論文(博士)  

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  • Specific detection of gaseous NO and 15NO in the headspace from liquid-phase reactions involving NO-generating organic, inorganic, and biochemical samples using a mid-infrared laser 査読

    ザハラン ザキナビハアハメド

    Nitric Oxide   15 ( 2 )   154 - 162   2006年9月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Synthesis, molecular structure, and redox behavior of an oxo-bridged dimer of a ruthenium-bpb nitrosyl 査読

    ザハラン ザキナビハアハメド

    Zaki N Zahran, Douglas R Powell, George B Richter-Addo   359 ( 9 )   3084 - 3088   2006年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  • Fiber-optic infrared spectroelectrochemical studies of six-coordinate manganese nitrosyl Porphyrins in nonaqueous media 査読

    ZN Zahran, MJ Shaw, MA Khan, GB Richter-Addo

    INORGANIC CHEMISTRY   45 ( 6 )   2661 - 2668   2006年3月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:AMER CHEMICAL SOC  

    The redox behavior of the six-coordinate (por)Mn(NO)(1-Melm) (por = tetraphenylporphyrin dianion (TPP), tetratolylporphyrin dianion (TTP), or tetra-p-methoxyphenylporphyrin dianion (T(p-OMe)PP)) complexes were examined by cyclic voltammetry at room temperature and at -78 degrees C in two nonaqueous solvents (CH2Cl2 and THF) at a Pt disk electrode. In CH2Cl2 at room temperature, the compounds undergo four oxidations and two reductions within the solvent limit; in THF, the compounds undergo one oxidation and three reductions. In both solvents, the first oxidation represents a chemically irreversible one-electron process involving the rapid loss of nitric oxide. The oxidation occurs at the MnNO site as judged from bulk electrolysis, UV-vis spectroscopy at room temperature, and IR spectroelectrochemistry at room temperature and at -78 degrees C. The second oxidation, accessible in CH2Cl2, is also chemically irreversible and occurs at the porphyrin ring; the third and the fourth oxidations are, on the other hand, chemically reversible but also occur at the porphyrin ring. The first reduction is chemically irreversible in CH2Cl2, occurs at the porphyrin ring, and is followed by loss of NO. In THF, the first reduction is chemically reversible and is followed by reversible loss of NO.

    DOI: 10.1021/ic051190n

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  • Synthesis, characterization and molecular structures of six-coordinate manganese nitrosyl porphyrins 査読

    ZN Zahran, J Lee, SS Alguindigue, MA Khan, GB Richter-Addo

    DALTON TRANSACTIONS   ( 1 )   44 - 50   2004年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ROYAL SOC CHEMISTRY  

    Manganese(II) porphyrins are isoelectronic with iron(II) porphyrins, and previously reported work suggests that manganese nitrosyl porphyrins are good structural models for their kinetically unstable and biologically relevant ferric - NO analogues. We have prepared a new set of six-coordinate manganese nitrosyl porphyrins of the general form (por) Mn(NO)(L) (por = TTP, T(p-OCH3) PP; L = piperidine, methanol, 1-methylimidazole) in moderate to high yields. The (por) Mn(NO)(pip) complexes were prepared from the reductive nitrosylation of the (por) MnCl compounds with NO in the presence of piperidine. The IR spectra of the (por) Mn(NO)(pip) compounds as KBr pellets show new strong bands at 1746 cm(-1) (for TTP) and 1748 cm(-1) (for (T(p-OCH3)PP) due to the NO ligands. Attempted crystallization of one of these compounds ( por = TTP) from dichloromethane - methanol resulted in the generation of the methanol complex (TTP) Mn(NO)(CH3OH). Reaction of the (por)Mn(NO)(pip) compounds with excess 1-methylimidazole gave the (por)Mn(NO)(1-MeIm) derivatives in good yields. The IR spectra of these compounds show nu(NO) bands that are similar to12 cm(-1) lower than those of the (por) Mn(NO)(pip) precursors, indicative of greater Mn --> NO pi-backdonation in the 1-MeIm derivatives. X-Ray crystal structures of three of these compounds, namely (TTP) Mn(NO)(CH3OH), (TTP) Mn(NO)(1-MeIm) and (T(p-OCH3) PP) Mn(NO)(1-MeIm) were obtained, and reveal that the NO ligands in these complexes are linear.

    DOI: 10.1039/b308143p

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▶ 全件表示

書籍等出版物

  • Photoisomerization of polypyridyl ruthenium (II): aquo complexes

    ザハラン ザキナビハアハメド( 担当: 分担執筆)

    2019年 

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  • Water oxidation using molecular photocatalysts

    ザハラン ザキナビハアハメド( 担当: 分担執筆)

    2019年 

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産業財産権

  • Catalysts and their preparation methods

    ザハラン ザキナビハアハメド

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    出願番号:特願2019-90888  出願日:2019年5月

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  • Preparation methods of catalysts, preparation methods of metal oxides and their catalysts

    ザハラン ザキナビハアハメド

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    出願番号:特願2019-95465  出願日:2019年5月

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受賞

  • JSPS scholarship for foreigner researcher

    2010年  

    ザハラン ザキナビハアハメド

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  • The graduate college poster award

    2003年   University of Oklahoma  

    ザハラン ザキナビハアハメド

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  • Ph.D scholarship

    The Egyptian Government Scholarship in Chemistry  

    ザハラン ザキナビハアハメド

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共同研究・競争的資金等の研究

  • Developing efficient inexpensive catalysts for solar driven carbon dioxide-to-fuels conversion towards artificial photosynthesis

    2018年4月 - 2020年3月

    JSPS Japan Society for the Promotion of Science 

    ザハラン ザキナビハアハメド

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    担当区分:研究代表者  資金種別:競争的資金

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