Highly Selective Photoelectroreduction of Carbon Dioxide to Ethanol over Graphene/Silicon Carbide Composites.

Guanghui Feng, Shibin Wang, Shenggang Li, Ruipeng Ge, Xuefei Feng, Junwei Zhang, Yanfang Song, Xiao Dong, Jiazhou Zhang, Gaofeng Zeng, Qiang Zhang, Guijun Ma, Yi-De Chuang, Xixiang Zhang, Jinghua Guo, Yuhan Sun, Wei Wei, Wei Chen

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Using sunlight to produce valuable chemicals and fuels from carbon dioxide (CO2), i.e., artificial photosynthesis (AP) is a promising strategy to achieve solar energy storage and a negative carbon cycle. However, selective synthesis of C2 compounds with a high CO2 conversion rate remains challenging for current AP technologies. We performed CO2 photoelectroreduction over a graphene/silicon carbide (SiC) catalyst under simulated solar irradiation with ethanol (C2H5OH) selectivity of > 99% and a CO2 conversion rate of up to 17.1 mmol∙gcat-1·h-1 with sustained performance. Experimental and theoretical investigations indicated an optimal interfacial layer to facilitate the transfer of photogenerated electrons from the SiC substrate to the few-layer graphene overlayer, which also favored an efficient CO2 to C2H5OH conversion pathway.
Original languageEnglish (US)
JournalAngewandte Chemie (International ed. in English)
DOIs
StatePublished - Feb 14 2023

ASJC Scopus subject areas

  • General Chemistry
  • Catalysis

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