Cathode reaction mechanism of CO2/H2O co-electrolysis in solid oxide electrolyte cells

Title
Cathode reaction mechanism of CO2/H2O co-electrolysis in solid oxide electrolyte cells
Authors
홍종섭김형철윤경중이종호제해준김병국
Issue Date
2014-07
Publisher
11th European SOFC & SOE Forum
Abstract
Cathode reactions inside solid oxide electrolyte cells (SOEC) for co-electrolysis of steam/CO2 mixtures are examined to elucidate their reduction pathway and enable controlling the syngas yield and selectivity. To investigate important products at various loads, cathode reaction products are analyzed by an online mass spectrometer and gas chromatography. It is shown that the electrochemical reaction pathway is substantially different from that of solid oxide fuel cells. The syngas production rate and product selectivity are highly dependent on gas concentrations, flow rates and electrical loads. It is highlighted that the cathode reaction mechanism is critical to optimize the syngas production rate and product selectivity, and hence the design and operation of coelectrolysis SOEC.
URI
http://pubs.kist.re.kr/handle/201004/49229
Appears in Collections:
KIST Publication > Conference Paper
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