Three-dimensional crumpled graphene (PRGO) was synthesized from graphene oxide (GO) solution by the spay drying method and employed as the support material for the Pd catalyst. Compared with the commercial Pd/C and Pd/RGO catalysts, the as-prepared Pd/PRGO catalyst exhibits excellent activity and stability towards formic acid electrooxidation.
Core-shell WO2/WO3 microspheres were prepared using a phase transformation route. The as-prepared Pt-WO2/WO3 catalyst exhibits excellent activity and stability towards methanol electrooxidation, compared with those of commercial PtRu/C and Pt/h-WO3, due to the decrease of the electron-transfer resistance by the modification of using WO2 as a conductive oxide.
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