NiOx boosted Pt-shell for efficient hydrogen evolution reaction
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Release time:2022-09-14 Impact Factor:7.2 Journal:Materials Today Sustainability Abstract:The high-cost and the limited availability of Pt are the main barriers blocking the commercial application in electrochemical water splitting. Here, we found that Pt thin layers situated on nanostructured NiOx supported on graphene sheets show significantly higher activity for hydrogen evolution reaction (HER) in both acid and alkaline conditions. The NiOx could dramatically boost the HER activity of the on-top situated ultrathin Pt layer. The NiOx@Pt core-shell structure displays overpotentials of only 22 and 38.3 mV at 10 mA cm−2 for HER in alkaline and acid electrolytes, respectively, significantly lower than commercial Pt/C. The enhanced activity can be attributed to the monolayer nature of Pt and the bifunctional mechanism between the NiOx and Pt, which activate the Pt active sites by the NiOx sublayer. Indexed by:Journal paper Volume:19 Translation or Not:no Date of Publication:2022-09-14 -
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