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As an attempt to minimize the usage amounts of noble metals in catalysis, PtAg alloy nanocrystals with a porous nanosheet morphology were fabricated through a galvanic replacement reaction. During the reaction, ascorbic acid was added to the solution to protect the Ag triangular nanoplates from being totally etched. Structural characterizations indicated that the obtained nanocrystals had thin porous...
In this paper, Ni nanoparticles (NPs) are prepared in an aqueous solution by using sodium borohydride as reducing agent. With Ni NPs as the sacrificial template, hollow NiPdAu NPs are successfully prepared via partly galvanic displacement reaction between suitable metal precursors and Ni NPs. The as-synthesized hollow NiPdAu NPs can well dispersed on the carbon substrate. Transmission electron microscopy,...
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