Research progress of electrocatalysts towards electrocatalytic reduction reaction of carbon dioxide to syngas
The conversion of carbon dioxide(CO2)to valuable syngas(CO/H2)by electrocatalytic carbon dioxide reduction reaction(CRR)has attracted widespread attention.The development of electrocatalysts for CRR is crucial for efficient and accurate synthesis of syngas.This article reviews the research progress on the reaction process,reaction mechanism,and the electrocatalysts of CRR to syngas.The types,advantages,existing problems,and development directions of existing CRR catalysts were introduced.The influence of the types and proportions of doping elements in catalysts on the reaction intermediates were analyzed in detail.The effects of the edge and active site of the metal atom doped with non-metallic elements on CRR were pointed out.The precise regulation CO and H2 by catalyst design and reaction condition adjustment were discussed.The article also discusses the ways to promote CRR and regulate the hydrocarbon ratio of syngas such as increasing reaction active sites and reducing the reaction energy barrier of intermediates.Furthermore,it was concluded that the efficiency of CRR to syngas could be improved through multi-stage regulation of catalyst morphology,multi-active site design,and the coupling of CO2 reduction and anodic reaction.Finally,the challenges and issues in future industrial production of syngas through CRR were discussed.
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