• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2021 Fiscal Year Research-status Report

Understanding and development of highly efficient water splitting catalysts with core-shell structures for solar-hydrogen production

Research Project

Project/Area Number 20K05684
Research InstitutionNiigata University

Principal Investigator

ZAHRAN ZAKI・NABEIH・AHMED  新潟大学, 自然科学系, 特任准教授 (60824646)

Project Period (FY) 2020-04-01 – 2023-03-31
Keywordscatalysts / Nickel sulfide / Nickel salts
Outline of Annual Research Achievements

We succeeded in developing a unique motif of nickel sulfide nanowires stuffed into carbon nitride scabbards (NiSx/C3N4) electrocatalyst for electrocatalytic water splitting that exhibited the lowest overall overpotential of 72 mV for water splitting when used as an anode in alkaline water electrolysis. This motif provides a key of a guided thought to develop efficient catalysts for oxygen evolution. We also developed Different NiOx films adhered rigidly on nickel foam (NF) and fluorine-doped tin oxide (FTO) substrates prepared from different Ni salts via a mixed metal-imidazole casting (MiMIC) method. The counter ions of Ni salts are significantly influential on the structure and characters of the formed NiOx films. In the case of the film prepared from the sulfate precursor, an amorphous NiIIIOx nano-sheet film was formed in contrast to face-centered cubic NiIIO crystalline nanoparticle films formed using the other precursors, under the same conditions. The SO4-NiOx / NF electrode demonstrated the superior OER performance with an overpotential, η10 = 228 mV at a current density of 10 mA cm-2 in alkaline KOH solutions, which is lower by 145 ~ 165 mV than those (η10 = 373 ~ 393 mV) of the other NiOx / NF electrodes. The OER performance of the SO4-NiOx / NF electrode compares advantageously with state-of-the-art Ni-based anodes reported to date.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

We were able to achieve our target in preparing a highly efficient water oxidation catalysts based on earth abundant materials. These catalysts showed very high activity for the water oxidation which is essential half reaction for the hydrogen production.

Strategy for Future Research Activity

We are currently trying to stabilize these Ni based catalysts to work for long terms (years) which are essential for practical application towards the production of hydrogen. We also trying to understand the special properties of these materials in order to developing more efficient and stable catalysts for the water oxidation.

  • Research Products

    (7 results)

All 2022 2021

All Journal Article (7 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 7 results)

  • [Journal Article] Nickel Sulfate as an Influential Precursor of Amorphous High-Valent Ni(III) Oxides for Efficient Water Oxidation in Preparation via a Mixed Metal-Imidazole Casting Method2022

    • Author(s)
      Zahran Zaki N.、Mohamed Eman A.、Katsuki Tomohiro、Tsubonouchi Yuta、Yagi Masayuki
    • Journal Title

      ACS Applied Energy Materials

      Volume: 5 Pages: 1894~1904

    • DOI

      10.1021/acsaem.1c03379

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Highly Efficient and Durable Electrocatalysis by a Molecular Catalyst with Long Alkoxyl Chains Immobilized on a Carbon Electrode for Water Oxidation2022

    • Author(s)
      Tsubonouchi Yuta、Hayasaka Taichi、Wakai Yuki、Mohamed Eman. A.、Zahran Zaki N.、Yagi Masayuki
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 14 Pages: 15154~15164

    • DOI

      10.1021/acsami.1c24263

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Bipyridine-based polybenzimidazole as a nitrogen-rich ionomer and a platinum nanoparticle support for enhanced fuel cell performance2022

    • Author(s)
      Berber Mohamed R.、Alenad Asma M.、Althubiti Numa A.、Alrowaili Ziyad A.、Zahran Zaki N.、Yagi Masayuki
    • Journal Title

      Fuel

      Volume: 312 Pages: 122954~122954

    • DOI

      10.1016/j.fuel.2021.122954

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Characterization of electrocatalytic proton reduction and surface adsorption of platinum nanoparticles supported by a polymeric stabilizer on an ITO electrode2022

    • Author(s)
      Tsubonouchi Yuta、Kajita Masashi、Hayasaka Taichi、Mandour Hamada S.、Berber Mohamed R.、Zahran Zaki N.、Yagi Masayuki
    • Journal Title

      Sustainable Energy & Fuels

      Volume: 6 Pages: 815~821

    • DOI

      10.1039/D1SE01760H

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Mechanism of H <sup>+</sup> dissociation?induced O-O bond formation via intramolecular coupling of vicinal hydroxo ligands on low-valent Ru(III) centers2021

    • Author(s)
      Tanahashi Yuki、Takahashi Kosuke、Tsubonouchi Yuta、Nozawa Shunsuke、Adachi Shin-ichi、Hirahara Masanari、Mohamed Eman A.、Zahran Zaki N.、Saito Kenji、Yui Tatsuto、Yagi Masayuki
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 118 Pages: e2113910118

    • DOI

      10.1073/pnas.2113910118

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A flexible cofacial Fe porphyrin dimer as an extremely efficient and selective electrocatalyst for the CO<sub>2</sub> to CO conversion in non-aqueous and aqueous media2021

    • Author(s)
      Mohamed Eman A.、Zahran Zaki N.、Naruta Yoshinori
    • Journal Title

      Journal of Materials Chemistry A

      Volume: 9 Pages: 18213~18221

    • DOI

      10.1039/D1TA04176B

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electrocatalytic water splitting with unprecedentedly low overpotentials by nickel sulfide nanowires stuffed into carbon nitride scabbards2021

    • Author(s)
      Zahran Zaki N.、Mohamed Eman A.、Tsubonouchi Yuta、Ishizaki Manabu、Togashi Takanari、Kurihara Masato、Saito Kenji、Yui Tatsuto、Yagi Masayuki
    • Journal Title

      Energy &amp; Environmental Science

      Volume: 14 Pages: 5358~5365

    • DOI

      10.1039/D1EE00509J

    • Peer Reviewed / Int'l Joint Research

URL: 

Published: 2022-12-28  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi