Controlled Surface-Assembly of Nanoscale Leaf-Type Cu-Oxide Electrocatalyst for High Activity Water Oxidation

The controlled surface deposition of a robust and high-performance nanostructured copper-oxide (CuO x -NLs) electrocatalyst for water oxidation is presented. The material exhibits a characteristic leaf-type morphology and self-assembles on a copper substrate by straightforward constant-current anodi...

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Bibliographic Details
Published inACS catalysis Vol. 6; no. 3; pp. 1768 - 1771
Main Authors Joya, Khurram S, de Groot, Huub J. M
Format Journal Article
LanguageEnglish
Published American Chemical Society 04.03.2016
Subjects
electrocatalyst
nanoscale leaves
water oxidation
oxygen evolution
copper-oxide
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Summary:The controlled surface deposition of a robust and high-performance nanostructured copper-oxide (CuO x -NLs) electrocatalyst for water oxidation is presented. The material exhibits a characteristic leaf-type morphology and self-assembles on a copper substrate by straightforward constant-current anodization. The oxygen onset occurs at about 1.55 V versus RHE (η = 320 mV), which is 400–500 mV less than for amorphous Cu-oxide films. A Tafel slope of 44 mV dec–1 is obtained, which is the lowest observed relative to other copper-based materials. Long-term catalytic performance and stability tests of the electrocatalytic CuO x -NLs sample show a stable current density of >17 mA cm–2 for oxygen evolution, which was sustained for many hours.
ISSN:2155-5435
2155-5435
DOI:10.1021/acscatal.5b02950