首页|A Cu-Pd alloy catalyst with partial phase separation for the electrochemical CO2 reduction reaction

A Cu-Pd alloy catalyst with partial phase separation for the electrochemical CO2 reduction reaction

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Cu catalysts can convert CO2 through an electrochemical reduction reaction into a variety of useful carbon-based products.However,this capability provides an obstacle to increasing the selectivity for a single product.Herein,we report a simple fabrication method for a Cu-Pd alloy catalyst for use in a mem-brane electrode assembly(MEA)-based CO2 electrolyzer for the electrochemical CO2 reduction reaction(ECRR)with high selectivity for CO production.When the composition of the Cu-Pd alloy catalyst was fabricated at 6:4,the selectivity for CO increased and the production of multi-carbon compounds and hydrogen is suppressed.Introducing a Cu-Pd alloy catalyst with 6:4 ratio as the cathode of the MEA-based CO2 electrolyzer showed a CO faradaic efficiency of 92.8％at 2.4 Vcell.We assumed that these results contributed from the crystal planes on the surface of the Cu-Pd alloy.The phases of the Cu-Pd alloy cat-alyst were partially separated through annealing to fabricate a catalyst with high selectivity for CO at low voltage and C2H4 at high voltage.The results of CO-stripping testing confirmed that when Cu partially separates from the lattice of the Cu-Pd alloy,the desorption of*CO is suppressed,suggesting that C-C coupling reaction is favored.

Cu-Pd catalystElectrodepositionElectrochemical carbon dioxide reductionPartial phase separationMembrane electrode assembly-basedelectrolyzer

Gyeong Ho Han、Jung Yong Seo、Minji Kang、Myung-gi Seo、Youngheon Choi、Soo Young Kim、Sang Hyun Ahn

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School of Chemical Engineering and Material Science,Chung-Ang University,Seoul 06974,Republic of Korea

Lotte Chemical Institute of Technology,Daejeon 34110,Republic of Korea

Department of Materials Science and Engineering,Korea University,Seoul 02841,Republic of Korea

National Research Foundation of Korea(NRF)grant funded by the Korean government MSITNational Research Foundation of Korea(NRF)grant funded by the Korean government MSITNational Research Foundation of Korea(NRF)grant funded by the Korean government MSITLotte Chemical Company

2021R1A2C20933582021R1A4A30278782022M3I3A1081901

2024

10.1016/j.jechem.2024.01.071

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.93(6)
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