Non-copper metals catalyzing deep CO₂ electroreduction to hydrocarbon
Date
2024
Authors
Chen, C.
Bai, X.
Jiao, Y.
Zheng, Y.
Qiao, S.-Z.
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Journal article
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Journal of Materials Chemistry A, 2024; 12(46):31925-31931
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Chaojie Chen, Xiaowan Bai, Yan Jiao, Yao Zheng, and Shi-Zhang Qiao
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Abstract
Copper (Cu) is recognized as a unique metal catalyst in the electrochemical CO2 reduction reaction (CO2RR) because its moderate *CO binding ability can accelerate deep CO2 reduction to valuable products. Here, for the first time, we realize the CO2RR to hydrocarbon on various non-copper metal catalysts (Pd, Ag, Zn, and Ga) through a general strategy of modifying the local reaction environment. Taking the metallic Pd catalyst as an example, whose typical products were CO and H2 in previous studies, a total faradaic efficiency of 50% to CH4 + C2H4 can be achieved by implementing a preelectrochemical activation process on the catalysts. The activation process can facilitate the adsorption behavior of interfacial *OH. The intensive spectroscopic studies combined with theoretical calculations revealed that improved *OH coverage prohibits the surface from *CO poisoning and accelerates the *CO hydrogenation process to *COH, accounting for the deep electroreduction to hydrocarbon products. Such a strategy of modifying the local environment can be extended to other I-type metals (Ag, Zn, and Ga) to generate hydrocarbons. This work highlights a new insight for advancing the CO2RR to hydrocarbon beyond copper metal catalysts.
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© The Royal Society of Chemistry 2024.