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Selective CO2 electroreduction to methanol via enhanced oxygen bonding
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Selective CO2 electroreduction to methanol via enhanced oxygen bonding
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Journal Article
Selective CO2 electroreduction to methanol via enhanced oxygen bonding
2022
Overview
The reduction of carbon dioxide using electrochemical cells is an appealing technology to store renewable electricity in a chemical form. The preferential adsorption of oxygen over carbon atoms of intermediates could improve the methanol selectivity due to the retention of C–O bond. However, the adsorbent-surface interaction is mainly related to the
d
states of transition metals in catalysts, thus it is difficult to promote the formation of oxygen-bound intermediates without affecting the carbon affinity. This paper describes the construction of a molybdenum-based metal carbide catalyst that promotes the formation and adsorption of oxygen-bound intermediates, where the
sp
states in catalyst are enabled to participate in the bonding of intermediates. A high Faradaic efficiency of 80.4% for methanol is achieved at −1.1 V vs. the standard hydrogen electrode.
While the reduction of CO
2
to specific products offers a valuable approach mitigating gas emissions, it is challenging to control the formation of crucial intermediates. Here, authors report a strategy to promote the formation of oxygen-bound intermediates and boost the methanol production.
