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 Communjournal_title
Nature communicationsauthors
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 PMdoi
10.1038/ncomms13869subject
Has Abstractpub_date
2016-12-13 00:00:00pages
13869issn
2041-1723pii
ncomms13869journal_volume
7pub_type
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