Abstract
AbstractThe electrocatalytic CO2 reduction reaction (CO2RR) to generate syngas (a mixture of CO and H2) is considered as one of the most effective routes to peak C and C neutrality. However, it is challenging to regulate the CO/H2 ratio by adjusting the activity of CO2RR. To address this problem, transition metals were designed to be encapsulated in C shells and loaded onto N‐doped C (NG) substrate catalysts for CO2RR generation of syngas. Comparative electrochemical tests revealed that Fe and Ni nanoparticles supported on N‐doped C matrix (denoted as Fe/NG and Ni/NG) produce CO/H2 in a wide range of relative ratios, thereby limiting their application in real industrial production. In contrast, Fe−Ni alloy nanoparticle supported on NG matrix (denoted as Fe2Ni/NG, where the subscript represents the molar ratio of the Fe source to Ni source) catalysts containing both Fe and Ni with a molar ratio of 2 : 1 exhibit high syngas evolution (1.2–2.9), suitable for typical downstream thermochemical reactions. The results provide a useful case for nonprecious metals to retain CO2RR, maintaining high activity while flexibly regulating the CO/H2 ratio.
Published Version
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