Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 9, Issue 46, Pages 40290-40297Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b12994
Keywords
oxygen evolution reaction; solar hydrogen; solid solutions; water splitting; photocatalysis
Funding
- CERCA Programme from Generalitat de Catalunya
- Spanish MINECO [MAT2014-59961-C2-2-R]
- Severo Ochoa Program (MINECO) [SEV-2013-0295]
- MINECO [FJCI-2014-19745]
- [2014 SGR 1638]
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CoxNi1-xTiO3 systems evaluated as photo- and electrocatalytic materials for oxygen evolution reaction (OER) from water have been studied. These materials have shown promising properties for this half-reaction both under (unbiased) visible-light photocatalytic approach in the presence of an electron scavenger and as electrocatalysts in dark conditions in basic media. In both situations, Co0.8Ni0.2TiO3 exhibits the best performance and is proved to display high faradaic efficiency. A synergetic effect between Co and Ni is established, improving the physicochemical properties such as surface area and pore size distribution, besides affecting the donor density and the charge carrier separation. At higher Ni content, the materials exhibit behavior more similar to that of NiTiO3, which is a less suitable material for OER than CoTiO3.
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