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Description:

Green rust (GR), a Fe2+/Fe3+-layered double hydroxide (LDH), was thought to be extremely unstable toward oxidation and thus less well studied as catalysts and their supports than many other LDHs. Here, the modification of a [Fe2+-Fe3+] mixed valent iron hydroxide, that we term GR, with Cu species and application of the Cu-modified GR as the catalyst for the hydrolysis of ammonia borane (AB) was described. From spectroscopic and microscopic analyses, the Cu-modified GR was composed of plate-like GR particles decorated with Cu2O clusters and nanoparticles on the particles’ surfaces and edges. The Cu-modified GR, synthesized via the modification of ball-milled GR with Cu2O species, exhibited an excellent H2 evolution rate and amount at room temperature under solar simulator irradiation that was faster and larger, respectively, than Pt nanoparticle-supported and Cu-modified TiO2. Control catalytic tests without solar simulator irradiation and an action spectrum study suggested that the Cu-modified GR showed light-assisted catalysis toward AB hydrolysis thanks to Cu2O modifiers.

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• In Copyright
  

Keyword: Mixed-valent ironcompound, Green rust, Ammonia borane

Date published:

Publisher: 一般社団法人 日本粘土学会

Journal:

• Clay Science (ISSN: 21863555) vol. 294 issue. 3-4 p. 39-45

Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6087

First published URL: https://doi.org/10.11362/jcssjclayscience.MS-25-7

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Updated at: 2025-12-26 16:50:06 +0900

Published on MDR: 2026-01-02 17:31:07 +0900