Boron-doped electrocatalysts derived from carbon dioxide

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This work addresses the derivation of active electrocatalysts using carbon dioxide (CO2) as a carbon source. CO2 is converted to boron-doped porous carbon (B-PC) with sodium borohydride as a reduction agent at ambient pressure and 500 degrees C. Further activation of the BPC using the thermal treatment in the presence of NaBH4 greatly enhances its catalytic activity for oxygen reduction reaction (ORR). The treated B-PC has ORR activity comparable to a Pt-activated carbon (Pt-AC) catalyst but it shows better ORR selectivity. The improvement of electrocatalytic performance is not originated from the carbon morphology change but comes from the change of surface boron bonds with carbon atoms and the widened p state. The synthesis of B-PC from CO2 under mild conditions and the application of the derived B-PC to the fuel cell electrode might be one feasible way of numerous sustainable CO2 utilization practices.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2013-08
Language
English
Article Type
Article
Keywords

OXYGEN REDUCTION REACTION; METAL-FREE ELECTROCATALYSTS; AMORPHOUS-CARBON; POROUS CARBON; FUEL-CELLS; CATALYSTS; NANOTUBES; TEMPERATURE; ARRAYS; IRON

Citation

JOURNAL OF MATERIALS CHEMISTRY A, v.1, no.30, pp.8665 - 8671

ISSN
2050-7488
DOI
10.1039/c3ta11248a
URI
http://hdl.handle.net/10203/175630
Appears in Collection
CBE-Journal Papers(저널논문)
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