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

Abstract:

: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.

journal_name

Nat Commun

journal_title

Nature communications

authors

Wu J,Ma S,Sun J,Gold JI,Tiwary C,Kim B,Zhu L,Chopra N,Odeh IN,Vajtai R,Yu AZ,Luo R,Lou J,Ding G,Kenis PJ,Ajayan PM

doi

10.1038/ncomms13869

subject

Has Abstract

pub_date

2016-12-13 00:00:00

pages

13869

issn

2041-1723

pii

ncomms13869

journal_volume

7

pub_type

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