Journal
ACS CATALYSIS
Volume 6, Issue 2, Pages 494-497Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.5b02653
Keywords
photocatalysis; carbon dioxide; methane; visible light; titanium dioxide
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Funding
- U.S. National Science Foundation [NSF-CBET-0931587]
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The large energy requirement of CO2 reforming of methane (CRM) has obstructed its application. Solar energy is a solution for the issue. Different from efficient photocatalytic splitting of water, photocatalysis for CRM exhibits a very low efficiency and employs only ultraviolet (UV) light. This letter reports an efficient visible-light photocatalytic CRM by combining Pt/black TiO2 catalyst with light-diffuse-reflection-surface. Under visible light illumination by filtering UV light from AM 1.5G sunlight, H-2 and CO yields reached 71 and 158 mmol/h/g(cat), with a quantum efficiency of 32.3% at 550 degrees C, and 129 and 370 mmol/h/g(cat), with a quantum efficiency of 57.8% at 650 degrees C. Those yields are 3 orders of magnitude larger than the reported values.
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