期刊
ACS CATALYSIS
卷 6, 期 3, 页码 1840-1847出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.5b02586
关键词
biomass conversion; 5-hydroxymethylfurfural; 2,5-bis(hydroxymethyl)furan; electrochemical hydrogenation; aldehyde reduction; solar biomass conversion; photoelectrochemical cell
资金
- University of Wisconsin Madison
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences [DE-SC0008707]
- U.S. Department of Energy (DOE) [DE-SC0008707] Funding Source: U.S. Department of Energy (DOE)
Reductive biomass conversion has been conventionally conducted using H-2 gas under high-temperature and-pressure conditions. In this study, efficient electrochemical reduction of 5-hydroxymethylfurfural (HMF), a key intermediate for biomass conversion, to 2,5-bis(hydroxymethyl)furan (BHMF), an important monomer for industrial processes, was demonstrated using Ag catalytic electrodes. This process uses water as the hydrogen source under ambient conditions and eliminates the need to generate and consume H-2 for hydrogenation, providing a practical and efficient route for BHMF production. By systematic investigation of HMF reduction on the Ag electrode surface, BHMF production was achieved with the Faradaic efficiency and selectivity nearing 100%, and plausible reduction mechanisms were also elucidated. Furthermore, construction of a photoelectrochemical cell (PEC) composed of an n-type BiVO4 semiconductor anode, which uses photogenerated holes for water oxidation, and a catalytic Ag cathode, which uses photoexcited electrons from BiVO4 for the reduction of HMF to BHMF, was demonstrated to utilize solar energy to significantly decrease the external voltage necessary for HMF reduction. This shows the possibility of coupling electrochemical HMF reduction and solar energy conversion, which can provide more efficient and environmentally benign routes for reductive biomass conversion.
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