Jeong, Hyeon-Ye Kim, Si-Won Bae, Yonggyun Yoon, Kyung Joong Lee, Jong-Ho Hong, Jongsup 2024-01-19T19:33:41Z 2024-01-19T19:33:41Z 2022-01-25 2019-07 0363-907X https://pubs.kist.re.kr/handle/201004/119797 This study proposes a novel methodology for controlling syngas production from high-temperature CO2/steam co-electrolysis. The co-electrolysis of CO2/steam mixtures is one of the most promising methods to reduce CO2 emissions and mitigate climate change. CO2 and steam are reduced to produce synthetic gas (H-2 and CO) through thermo-electrochemical reactions occurring in a solid-oxide-cell fuel electrode. To make this technology viable, it is essential to improve electrochemical cell performance and obtain controllability of gas conversion and product gas selectivity. In this study, Fe infiltration to the Ni/YSZ fuel electrode and subsequent in situ alloying of Ni-Fe is used to enhance the cell performance and syngas productivity. Impregnation of Fe-oxide nanoparticles on the fuel electrode support of solid oxide cells and subsequent in situ alloying Ni-Fe is obtained. Their homogeneous morphology and distribution are obtained by using an advanced infiltration technique. Results show that the Ni-Fe/YSZ fuel electrode enhances CO selectivity and lowers an overvoltage imposed on the cell. This may result in syngas production with higher carbon contents and a higher co-electrolysis system efficiency. In addition, its long-term durability for 500-hour operation is also evidenced with stable syngas production and negligible cell degradation. English WILEY Effect of Fe infiltration to Ni/YSZ solid-oxide-cell fuel electrode on steam/CO2 co-electrolysis Article 10.1002/er.4577 1 INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.43, no.9, pp.4949 - 4958 INTERNATIONAL JOURNAL OF ENERGY RESEARCH 43 9 4949 4958 N scie scopus 000476956400071 2-s2.0-85065987413 Energy & Fuels Nuclear Science & Technology Energy & Fuels Nuclear Science & Technology Article CARBON DEPOSITION PERFORMANCE H2O MIXTURES CATHODE WATER GAS bimetallic alloy CO2 conversion CO2 reduction electrolysis solid oxide cell syngas selectivity