Research Abstract

二酸化炭素の多炭素炭化水素および酸素化物への還元のための金属を含まない電極触媒 ブックマーク

A metal-free electrocatalyst for carbon dioxide reduction to multi-carbon hydrocarbons and oxygenates

2016年12月13日 Nature Communications 7 : 13869 doi: 10.1038/ncomms13869 (2016)


Jingjie Wu, Sichao Ma, Jing Sun, Jake I. Gold, ChandraSekhar Tiwary, Byoungsu Kim, Lingyang Zhu, Nitin Chopra, Ihab N. Odeh, Robert Vajtai, Aaron Z. Yu, Raymond Luo, Jun Lou, Guqiao Ding, Paul J. A. Kenis and Pulickel M. Ajayan

Corresponding Authors

Guqiao Ding
Chinese Academy of Sciences

Paul J.A. Kenis
九州大学 カーボンニュートラル・エネルギー国際研究所

Pulickel M. Ajayan
Rice University

Electroreduction of carbon dioxide into higher-energy liquid fuels and chemicals is a promising but challenging renewable energy conversion technology. Among the electrocatalysts screened so far for carbon dioxide reduction, which includes metals, alloys, organometallics, layered materials and carbon nanostructures, only copper exhibits selectivity towards formation of hydrocarbons and multi-carbon oxygenates at fairly high efficiencies, whereas most others favour production of carbon monoxide or formate. Here we report that nanometre-size N-doped graphene quantum dots (NGQDs) catalyse the electrochemical reduction of carbon dioxide into multi-carbon hydrocarbons and oxygenates at high Faradaic efficiencies, high current densities and low overpotentials. The NGQDs show a high total Faradaic efficiency of carbon dioxide reduction of up to 90%, with selectivity for ethylene and ethanol conversions reaching 45%. The C2 and C3 product distribution and production rate for NGQD-catalysed carbon dioxide reduction is comparable to those obtained with copper nanoparticle-based electrocatalysts.