Electroreduction of CO2 toward High Current Density

Processes

Chunxiao Zhang¹  Qing Hu¹  Shenglin Yan¹  Jing Lin¹  Zhenmin Cheng¹ 

[1] State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;

关键词: CO₂ electroreduction;    electrocatalysts;    electrolyzers;    high current densities;    electrolytes;    long-term operations;   

DOI  :  10.3390/pr10050826

来源: DOAJ

【 摘 要 】

Carbon dioxide (CO₂) electroreduction offers an attractive pathway for converting CO₂ to valuable fuels and chemicals. Despite the existence of some excellent electrocatalysts with superior selectivity for specific products, these reactions are conducted at low current densities ranging from several mA cm⁻² to tens of mA cm⁻², which are far from commercially desirable values. To extend the applications of CO₂ electroreduction technology to an industrial scale, long-term operations under high current densities (over 200 mA cm⁻²) are desirable. In this paper, we review recent major advances toward higher current density in CO₂ reduction, including: (1) innovations in electrocatalysts (engineering the morphology, modulating the electronic structure, increasing the active sites, etc.); (2) the design of electrolyzers (membrane electrode assemblies, flow cells, microchannel reactors, high-pressure cells, etc.); and (3) the influence of electrolytes (concentration, pH, anion and cation effects). Finally, we discuss the current challenges and perspectives for future development toward high current densities.

【 授权许可】

Unknown