首页|High Methanol Tolerance of PdCo/C Catalysts for Oxygen Reduction
High Methanol Tolerance of PdCo/C Catalysts for Oxygen Reduction
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NETL
A PdCo/C catalyst was prepared by an organic colloid method using citrate as complexing agent， ethylene glycol (EG) as reducing agent and solvent。 And the nanocomposition was characterized by X-ray diffraction (XRD) and energy dispersive X-ray spec-troscopy (EDX)。 XRD patterns showed Pd particles had a face-centered cubic crystal structure and small particle size。 It was found that the Pd - Pd distance decreased by the addition of Co， indicating the formation of Pd-Co alloy。 The electrocatalytic activities were evaluated by oxygen reduction， which was executed with cyclic voltammetric method with a rotating disk electrode system。 The Pd-Co/C catalysts showed higher catalytic activities than Pd/C catalysts and， better methanol tolerance than Pt/C (Johnson-Matthey) for the oxygen reduction。 The results implied that the Pd-Co/C catalyst might be a good potential cathodic catalyst for direct methanol membrane fuel cell (DMFC)。
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