当前位置: X-MOL 学术J. Catal. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Efficient electrochemical reduction of CO2 into formate and acetate in polyoxometalate catholyte with indium catalyst
Journal of Catalysis ( IF 6.5 ) Pub Date : 2019-12-27 , DOI: 10.1016/j.jcat.2019.12.010
Bingjie Zha , Chunxiang Li , Jinjin Li

The electrocatalytic reduction of CO2 with In is severely hindered by its complex multi-electron reaction pathway for C2 products and the high reaction overpotential. Polyoxometalates (POM) with the ability to transport and store electrons and protons have great potential to overcome these limitations. The Keggin-type POM [SiW9V3O40]7− (SiW9V3) and metal indium were selected to build the electrocatalytic CO2 reduction system. It overcomed the low selectivity limitation of In for C2 products, converting CO2 to acetic acid over formic acid with an onset potential of −1.0 V vs. Ag/AgCl. The Faradaic efficiency for the production of acetate was up to 96.5% at −1.15 V vs. Ag/AgCl (−0.71 V vs. RHE) with nearly 96% selectivity. The electrochemical experimental studies and XPS spectra reveal that the V-center in SiW9V3 primarily facilitates the conversion of CO2 into acetate and formate.



中文翻译:

铟催化剂有效地将多金属氧酸盐阴极电解液中的CO 2电化学还原为甲酸盐和乙酸盐

In对CO 2的复杂多电子反应途径和高反应超电势严重阻碍了In对CO 2的电催化还原。具有传输和存储电子和质子能力的多金属氧酸盐(POM)具有克服这些局限性的巨大潜力。选择Keggin型POM [SiW 9 V 3 O 40 ] 7-(SiW 9 V 3)和金属铟来构建电催化CO 2还原系统。克服了In对C2产物转化CO 2的选择性低的局限性在甲酸上生成乙酸,相对于Ag / AgCl的起始电位为-1.0V。相对于Ag / AgCl,在-1.15 V时,乙酸盐的法拉第效率高达96.5%,相对于Ag / AgCl则为-0.71 V(相对于RHE),选择性接近96%。电化学实验研究和XPS光谱表明,SiW 9 V 3中的V中心主要促进了CO 2转化为乙酸盐和甲酸盐。

更新日期:2019-12-27
down
wechat
bug