Composition-tunable Pt-Co alloy nanoparticle networks: facile room-temperature synthesis and supportless electrocatalytic applications
Date
2012
Authors
Xu, Y.
Yuan, Y.
Ma, A.
Wu, X.
Liu, Y.
Zhang, B.
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ChemPhysChem, 2012; 13(10):2601-2609
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Abstract
PtCo alloy nanoparticle networks (NNs) with adjustable composition are synthesized by co-reduction of H2PtCl6 and CoCl2 with NaBH4 in an ethylene glycol assisted cetyltrimethylammonium bromide/water/chloroform system at room temperature. Electrochemical measurements indicate that the as-prepared spongelike PtCo NNs exhibit composition-dependent electrocatalytic activities and CO tolerance with better durability toward methanol and formic acid oxidation than commercially available Pt/C catalyst. In particular, Pt3Co NNs show the highest specific activity, while Pt2Co NNs exhibit optimal mass activity among PtCo alloy NNs with different composition. These PtCo alloy NNs may be promising supportless anode catalysts for the direct methanol and direct formic acid fuel cells.
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Copyright 2012 Wiley-VCH