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A quantum-chemical perspective into low optical-gap polymers for highly-efficient organic solar cells

Photosensitised pyrimidine dimerisation in DNA

Carbocatalysis: Heterogeneous carbons finding utility in synthetic chemistry

Alkynes as an eco-compatible “on-call” functionality orthogonal to biological conditions in water

Hydrogenation in flow: Homogeneous and heterogeneous catalysis using Teflon AF-2400 to effect gas–liquid contact at elevated pressure

Expanding the pleuromutilin class of antibiotics by de novo chemical synthesis

Amorphous molybdenum sulfide films as catalysts for electrochemical hydrogen production in water

Asymmetric organocatalytic [3 + 2]-annulation strategy for the synthesis of N-fused heteroaromatic compounds

A DNA-based strategy for dynamic positional enzyme immobilization inside fused silica microchannels

Exploring nucleation of H₂S hydrates

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High thermal and chemical stability in pyrazolate-bridged metal–organic frameworks with exposed metal sites

Terminal hafnium phosphinidene complexes and phosphinidene ligand exchange

Organometallic chemistry of extended periodic π-electron systems: hexahapto-chromium complexes of graphene and single-walled carbon nanotubes

Simple, robust molecular self-assembly on germanium

Chiral phosphoric acid-catalysed Friedel–Crafts alkylation reaction of indoles with racemic spiro indolin-3-ones

Exploiting CH-π interactions in supramolecular hydrogels of aromatic carbohydrate amphiphiles

Metal-mediated fabrication of new functional G-quartet-based supramolecular nanostructure and potential application as controlled drug release system

A copper and chromium based nanoparticulate oxide as a noble-metal-free cocatalyst for photocatalytic water splitting

Enantioselective synthesis of cyclic carbamimidates via a three-component reaction of imines, terminal alkynes, and p-toluenesulfonylisocyanate using a monophosphine gold(i) catalyst

Surface state during activation and reaction of high-performing multi-metallic alkyne hydrogenation catalysts

exTTF-capped gold nanoparticles as multivalent receptors for C₆₀

Horizontally and vertically aligned helical conjugated polymers: Comprehensive formation mechanisms of helical fibrillar morphologies in orientation-controlled asymmetric reaction fields consisting of chiral nematic liquid crystals

Highly efficient CdTe/CdS quantum dot sensitized solar cells fabricated by a one-step linker assisted chemical bath deposition

Dispersion of carbon nanotubes with SDS surfactants: a study from a binding energy perspective

Porphyrin–hexaphyrin hybrid tapes

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A copper and chromium based nanoparticulate oxide as a noble-metal-free cocatalyst for photocatalytic water splitting

Content Provider	Royal Society of Chemistry (RSC)
Author	Maeda, Kazuhiko Ohno, Tomoyuki Domen, Kazunari
Copyright Year	2011
Abstract	Nanoparticulate oxides consisting of copper (Cu) and chromium (Cr) were studied as noble-metal-free cocatalysts for photocatalytic water splitting. The structure of the Cu–Cr mixed oxide dispersed on a solid solution of GaN and ZnO (referred to as GaN : ZnO hereafter) was characterized by high-resolution transmission electron microscopy (HR-TEM), X-ray absorption fine-structure (XAFS) spectroscopy, and electrochemical measurements. The mixed-oxide nanoparticle was an effective promoter of photocatalytic overall water splitting on GaN : ZnO, and was loaded by impregnation from an aqueous solution containing Cu(NO3)2·3H2O and Cr(NO3)3·9H2O followed by calcination in air. Impregnation of GaN : ZnO with 1.5 wt% Cu and 2.0 wt% Cr followed by calcination at 623 K for 1 h provided the highest photocatalytic activity, while catalysts modified with either Cu-oxide or Cr-oxide showed little activity. The activity of this photocatalyst was shown to be strongly dependent on the generation of Cu(II)–Cr(III) mixed-oxide nanoparticles with optimal composition and coverage. The results of electrochemical measurements and photocatalytic reactions also indicated that Cu(II)–Cr(III) mixed-oxide nanoparticles on GaN : ZnO are resistant to both the photoreduction of O2 and water formation from H2 and O2, which are undesirable reverse reactions in overall water splitting.
Starting Page	1362
Ending Page	1368
Page Count	7
File Format	HTM / HTML PDF
ISSN	20416520
Volume Number	2
Issue Number	7
Journal	Chemical Science
DOI	10.1039/c1sc00177a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Spectroscopy Water splitting Oxygen Nanoparticle High-resolution transmission electron microscopy Photocatalysis Calcination Solid solution Gallium nitride Photocatalytic water splitting Chromium Electrochemistry X-ray absorption spectroscopy Copper
Content Type	Text
Resource Type	Article
Subject	Chemistry

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A copper and chromium based nanoparticulate oxide as a noble-metal-free cocatalyst for photocatalytic water splitting

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A copper and chromium based nanoparticulate oxide as a noble-metal-free cocatalyst for photocatalytic water splitting

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