# A Catalyst for Sodium Borohydride Dehydrogenation Based on a Mixed-Valent Iron Hydroxide Platform

https://mdr.nims.go.jp/datasets/54969eb8-ca9f-4b3f-b2a0-9031b0cba1e7

## File

- [25_ACSCatal_MDR.docx](https://mdr.nims.go.jp/filesets/7a05635e-864a-477e-8900-2865cded19ed/download) ([Detail](https://mdr.nims.go.jp/filesets/7a05635e-864a-477e-8900-2865cded19ed.md))

## Id

54969eb8-ca9f-4b3f-b2a0-9031b0cba1e7

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-24T10:14:11.398672Z

## Updated at

2025-12-25T01:18:16.358936Z

## Published at

2025-12-25T03:19:50.684585Z

## Doi

https://doi.org/10.48505/nims.6069

## First published url

https://doi.org/10.1021/acscatal.5c01894

## Date published

2025-07-18

## Recorded date published

2025-7-18

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: A Catalyst for Sodium Borohydride Dehydrogenation Based on a Mixed-Valent
    Iron Hydroxide Platform
  title_type: original
  lang: en

## Description

- description: Although sodium borohydride (NaBH4, SBH) has been investigated extensively
    as a high-capacity hydrogen-storage material that can be used to move towards
    a hydrogen-powered society, the development of efficient and cost-effective catalysts
    for the generation of hydrogen from SBH remains challenging. Here, we report that
    a mixed-valent [FeII−FeIII] iron hydroxide, which we term green rust (GR), treated
    with a CuCl2 solution, shows a good solar-light-assisted catalytic activity toward
    SBH hydrolysis at room temperature that is higher than existing catalysts based
    on precious and noble metals, including Pt nanoparticle-modified titanium dioxide
    (TiO2). Even without solar light, the GR-based catalyst exhibits turnover frequency
    (TOF) of up to 5000 min–1 for the hydrolysis of SBH at a higher temperature that
    is comparable to or one or two orders of magnitude higher than existing catalysts
    under similar conditions.  Comprehensive spectral and microscopic analyses revealed
    that our catalyst was composed of GR plate-like particles with edges that are
    decorated with aggregated Cu2O clusters with particle sizes down to 5 nm. Molecular
    dynamics simulations, combined with experimental results, demonstrate that the
    Cu2O modifier not only provides adsorption sites for SBH molecules but also acts
    as a cocatalyst for the transfer of photoexcited electrons in the GR component
    to the adsorbed SBH, both of which enable the effective activation of the reactant
    (BH4−).
  description_type: abstract
  lang: und

## Creator

- name: Ezz-Elregal M. Ezz-Elregal
  role: author
- name: Koichi Shinohara
  role: author
- name: Hamza El-Hosainy
  role: author
  orcid: https://orcid.org/0000-0001-8244-4382
- name: Takumi Miyakage
  role: author
- name: Takashi Toyao
  role: author
  orcid: https://orcid.org/0000-0002-6062-5622
- name: Ken-ichi Shimizu
  role: author
  orcid: https://orcid.org/0000-0003-0501-0294
- name: Akio Iwanade
  role: author
- name: Makoto Oishi
  role: author
  orcid: https://orcid.org/0000-0003-3402-4556
- name: Takuro Nagai
  role: author
  orcid: https://orcid.org/0000-0001-5239-3334
- name: Naoki Fukata
  role: author
  orcid: https://orcid.org/0000-0002-0986-8485
- name: Takumi Tsushima
  role: author
- name: Hiroto Yoshida
  role: author
  orcid: https://orcid.org/0000-0001-6890-4397
- name: Mitsutake Oshikiri
  role: author
  orcid: https://orcid.org/0000-0002-1856-204X
- name: Yusuke Ide
  role: author
  orcid: https://orcid.org/0000-0002-6901-6954

## Contact agent



## Publisher

organization: American Chemical Society (ACS)

## Managing organization



## Keyword

- subject: Mixed-valent ironcompound
  schema: not_defined
- subject: Layered double hydroxide
  schema: not_defined
- subject: Green rust
  schema: not_defined
- subject: Copper
  schema: not_defined
- subject: Hydrogen storage
  schema: not_defined
- subject: Sodium borohydride
  schema: not_defined
- subject: Hydrolysis
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: ACS Catalysis
  issn: '21555435'
  volume: '15'
  issue: '14'
  start_page: 12269
  end_page: 12280

## Conference



## Related item



## Funding

- identifier: JPMXP1223NM51
  funder_name: Ministry of Education, Culture, Sports, Science and Technology
- identifier: The World Premier International Research Center In
  funder_name: Ministry of Education, Culture, Sports, Science and Technology

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