We investigated tungsten monocarbide (WC) and Pt-modified WC as CO -tolerant electrocatalysts as compared to pure Pt. The binding energy of CO , estimated using temperature-programmed desorption, is weaker on WC and Pt ∕ WC than on Pt, suggesting that it should be easier to oxidize CO on WC and Pt ∕ WC . This hypothesis was verified using cyclic voltammetry to compare the electro-oxidation of CO on WC, Pt ∕ WC , and Pt supported on carbon substrates, which showed a lower voltage for the onset of oxidation of CO on WC and Pt ∕ WC than on Pt.
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Mellinger et al. (2008) studied this question.
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