期刊
CHEMISTRY OF MATERIALS
卷 28, 期 12, 页码 4160-4168出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.6b00301
关键词
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资金
- Ontario Ministry of Research Innovation (MRI)
- Ministry of Economic Development, Employment and Infrastructure (MEDI)
- Ministry of the Environment and Climate Change (MOECC)
- Connaught Innovation Fund
- Connaught Global Challenge Fund
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- CCDM
- EFRC - U.S. DOE-BES [DE-SC0012575]
- DOE-BES, Materials Science and Engineering Division [DE-SC0012704]
Nonstoichiometric indium oxide nanoparticles, In2O3-x(OH)(y), have been shown to function as active photocatalysts for gas-phase CO2 reduction under simulated solar irradiation. Herein we demonstrate that the choice of starting material has a strong effect on the photocatalytic activity of indium oxide nanoparticles. We examine three indium oxide materials prepared via the thermal decomposition of either indium(III) hydroxide or indium(III) nitrate and correlate their stability and photocatalytic activity to the number and type of defect present in the material. Further, we use (CO2)-C-13 isotope-tracing experiments to clearly identify the origins of the observed carbon-containing products. Significantly, we find that the oxidizing nature of the precursor anion has a substantial impact on the defect formation within the sample. This study demonstrates the importance of surface defects in designing an active heterogeneous photocatalyst and provides valuable insight into key parameters for the precursor design, selection, and performance optimization of materials for gas-phase CO2 reduction.
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