Photodeposition of copper and chromia on gallium oxide: The role of co-catalysts in photocatalytic water splitting

G. Wilma Busser; Bastian Mei; Anna Pougin; Jennifer Strunk; Ramona Gutkowski; Wolfgang Schuhmann; Marc Georg Willinger; Robert Schlögl; Martin Muhler

doi:10.1002/cssc.201301065

Photodeposition of copper and chromia on gallium oxide: The role of co-catalysts in photocatalytic water splitting

G. Wilma Busser
, Bastian Mei
, Anna Pougin
, Jennifer Strunk
, Ramona Gutkowski
, Wolfgang Schuhmann
, Marc Georg Willinger
, Robert Schlögl
, Martin Muhler

Max-Planck-lnstitut für Kohlenforschung
Abteilung Physikalische Chemie

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

Split second: The photocatalytic activity of gallium oxide (β-Ga ₂O₃) depends strongly on the co-catalysts CuO_x and chromia, which can be efficiently deposited in a stepwise manner by photoreduction of Cu²⁺ and CrO₄^2-. The water-splitting activity can be tuned by varying the Cu loading in the range 0.025-1.5 wt %, whereas the Cr loading is not affecting the rate as long as small amounts (such as 0.05 wt %) are present. Chromia is identified as highly efficient co-catalyst in the presence of CuO_x: it is essential for the oxidation of water.

Original language	English
Pages (from-to)	1030-1034
Number of pages	5
Journal	ChemSusChem
Volume	7
Issue number	4
DOIs	https://doi.org/10.1002/cssc.201301065
State	Published - Apr 2014
Externally published	Yes

Keywords

chromia
heterogeneous catalysis
photocatalysis
photodeposition
water splitting

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10.1002/cssc.201301065

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title = "Photodeposition of copper and chromia on gallium oxide: The role of co-catalysts in photocatalytic water splitting",

abstract = "Split second: The photocatalytic activity of gallium oxide (β-Ga 2O3) depends strongly on the co-catalysts CuOx and chromia, which can be efficiently deposited in a stepwise manner by photoreduction of Cu2+ and CrO42-. The water-splitting activity can be tuned by varying the Cu loading in the range 0.025-1.5 wt \%, whereas the Cr loading is not affecting the rate as long as small amounts (such as 0.05 wt \%) are present. Chromia is identified as highly efficient co-catalyst in the presence of CuOx: it is essential for the oxidation of water.",

keywords = "chromia, heterogeneous catalysis, photocatalysis, photodeposition, water splitting",

author = "Busser, \{G. Wilma\} and Bastian Mei and Anna Pougin and Jennifer Strunk and Ramona Gutkowski and Wolfgang Schuhmann and Willinger, \{Marc Georg\} and Robert Schl{\"o}gl and Martin Muhler",

year = "2014",

month = apr,

doi = "10.1002/cssc.201301065",

language = "English",

volume = "7",

pages = "1030--1034",

journal = "ChemSusChem",

issn = "1864-5631",

publisher = "Wiley-VCH Verlag",

number = "4",

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TY - JOUR

T1 - Photodeposition of copper and chromia on gallium oxide

T2 - The role of co-catalysts in photocatalytic water splitting

AU - Busser, G. Wilma

AU - Mei, Bastian

AU - Pougin, Anna

AU - Strunk, Jennifer

AU - Gutkowski, Ramona

AU - Schuhmann, Wolfgang

AU - Willinger, Marc Georg

AU - Schlögl, Robert

AU - Muhler, Martin

PY - 2014/4

Y1 - 2014/4

N2 - Split second: The photocatalytic activity of gallium oxide (β-Ga 2O3) depends strongly on the co-catalysts CuOx and chromia, which can be efficiently deposited in a stepwise manner by photoreduction of Cu2+ and CrO42-. The water-splitting activity can be tuned by varying the Cu loading in the range 0.025-1.5 wt %, whereas the Cr loading is not affecting the rate as long as small amounts (such as 0.05 wt %) are present. Chromia is identified as highly efficient co-catalyst in the presence of CuOx: it is essential for the oxidation of water.

AB - Split second: The photocatalytic activity of gallium oxide (β-Ga 2O3) depends strongly on the co-catalysts CuOx and chromia, which can be efficiently deposited in a stepwise manner by photoreduction of Cu2+ and CrO42-. The water-splitting activity can be tuned by varying the Cu loading in the range 0.025-1.5 wt %, whereas the Cr loading is not affecting the rate as long as small amounts (such as 0.05 wt %) are present. Chromia is identified as highly efficient co-catalyst in the presence of CuOx: it is essential for the oxidation of water.

KW - chromia

KW - heterogeneous catalysis

KW - photocatalysis

KW - photodeposition

KW - water splitting

UR - https://www.scopus.com/pages/publications/84898060183

U2 - 10.1002/cssc.201301065

DO - 10.1002/cssc.201301065

M3 - Article

C2 - 24591306

AN - SCOPUS:84898060183

SN - 1864-5631

VL - 7

SP - 1030

EP - 1034

JO - ChemSusChem

JF - ChemSusChem

IS - 4

ER -

Photodeposition of copper and chromia on gallium oxide: The role of co-catalysts in photocatalytic water splitting

Abstract

Keywords

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