期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 232, 期 -, 页码 391-396出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2018.03.071
关键词
CO2 reduction; Electrocatalysis; Cu mesostructure; Inverse opal; Acetylene
资金
- Korea CCS RAMP
- D Center (Korea CCS 2020 project) - Korean government (Ministry of Science, ICT and Future Planning) [KCRC-2014M1A8A1049303]
- Korea Research Institute of Chemical Technology (KRICT) [SI1701-05]
- National Research Council of Science & Technology (NST), Republic of Korea [SI1701-05] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Mass transfer, kinetics, and mechanism of electrochemical CO2 reduction have been explored on a model mesostructure of highly-ordered copper inverse opal (Cu-IO), which was fabricated by Cu electrodeposition in a hexagonally-closed packed polystyrene template. As the number of Cu-IO layers increases, the formation of C-2 products such as C2H4 and C2H5OH was significantly enhanced at reduced overpotentials (similar to 200 mV) compared to a planar Cu electrode. At the thickest layer, we observe for the first time the formation of acetylene (C2H2), which can be generated through a kinetically slow reaction pathway and be a key descriptor in the unveiling of the C-C coupling reaction mechanism. Based on our experimental observation, a plausible reaction pathway in Cu mesostructures is rationalized.
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