期刊
SCIENCE BULLETIN
卷 65, 期 9, 页码 711-719出版社
ELSEVIER
DOI: 10.1016/j.scib.2020.01.020
关键词
Electrochemical carbon dioxide reduction reaction; Synergy effects; Sn-Cu alloy; Mass activity; Formate
资金
- National Key R&D Program of China [2017YFA0700102]
- National Natural Science Foundation of China [21573222, 91545202, 21802124, 91945302, 91845103]
- Dalian National Laboratory for Clean Energy [DNL180404]
- Dalian Outstanding Young Scientist Foundation [2017RJ03]
- Liaoning Revitalization Talents Program [XLYC1907099]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17020200]
- CAS Youth Innovation Promotion [2015145]
- China Postdoctoral Science Foundation [2018M630307, 2019T120220]
- Dalian Institute of Chemical Physics [DICP DMTO201702]
To acquire the synergy effects between Sn and Cu for the jointly high Faradaic efficiency and current density, we develop a novel strategy to design the Sn-Cu alloy catalyst via a decorated co-electrodeposition method for CO2 electroreduction to formate. The Sn-Cu alloy shows high formate Faradaic efficiency of 82.3% +/- 2.1% and total C1 products Faradaic efficiency of 90.0% +/- 2.7% at 1.14 V vs. reversible hydrogen electrode (RHE). The current density and mass activity of formate reach as high as (79.0 +/- 0.4) mA cm2 and (1490.6 +/- 7.5) mA mg1 at 1.14 V vs. RHE. Theoretical calculations suggest that Sn-Cu alloy can obtain high Faradaic efficiency for CO2 electroreduction by suppressing the competitive hydrogen evolution reaction and that the formate formation follows the path of CO2 ? HCOO* ? HCOOH. The stepped (2 1 1) surface of Sn-Cu alloy is beneficial towards selective formate production. 2020 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
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