Abstract
Carbon–metal oxide composites as catalyst supports that possess unique electronic properties and synergistic effects show great promise in the area of catalysis but still remain a synthetic challenge. Here, we developed a simple and universal strategy to synthesize carbon–metal oxide composite supports by the one-step pyrolysis of carbohydrates (cyclodextrin, glucose, sucrose, and starch) and metal precursors (containing Ce, Nb, V, Zr, and Al salts). The carbohydrates with abundant hydroxyl and aldehyde groups tend to bond with metal cations to form homogeneous carbohydrate/metal ions precursors, which are then thermally converted into carbon/metal oxide composites (C–MOx) with uniformly distributed metal oxide nanoparticles. The prepared C–CeO2-supported Pt catalysts exhibit improved electrocatalytic performance for the methanol oxidation reaction, which could be ascribed to the presence of abundant Pt/CeO2 interfaces in the catalysts.
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