期刊
MATERIALS TODAY ENERGY
卷 11, 期 -, 页码 120-127出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mtener.2018.11.005
关键词
Rhodium; Excavated; High-energy facets; Surface structure; Ethanol electro-oxidation; C-C bond cleavage
资金
- National Basic Research Program of China [2015CB932301]
- National Key Research and Development Program of China [2017YFA0206801]
- National Natural Science Foundation of China [21333008, 21771153, 21773190, 21603178, 21621091]
- Natural Science Foundation of Fujian Province of China [2018J01015]
Direct ethanol fuel cells are a type of promising energy conversion device with high energy density, and their commercialization is still impeded by incomplete oxidation of ethanol on available electrocatalysts. Herein, a kind of novel excavated Rhodium (Rh) nanobranches constructed by ultrathin nanosheets with high-energy {110} facets and high surface area was successfully synthesized, which shows a high selectivity of complete oxidation ethanol to CO2 up to 15.8% (at 0.0 V vs Hg/HgO) in alkaline solution, outperforming currently reported monometallic electro-catalysts. The in situ Fourier transform infrared reflection spectroscopy and density function theory calculations demonstrated that the C-C bond cleavage of ethanol is very sensitive to the structure of Rh crystallites, and the unique {110} facets and excavated polyhedral morphology endow the Rh electro-catalysts with unexpected high selectivity, as well as high electro-catalytic activity and great structural stability. (C) 2018 Elsevier Ltd. All rights reserved.
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