School of Chemical Engineering and Energy , Zhengzhou University , Zhengzhou 450001 , China.
College of Chemistry and Chemical Engineering , Henan University , Kaifeng 475004 , Henan , China.
ACS Appl Mater Interfaces. 2019 Dec 4;11(48):45189-45198. doi: 10.1021/acsami.9b14020. Epub 2019 Nov 20.
The doping ring-core nickel phosphide/graphene nanomaterial is obtained by H reduction of the flower-like nickel phosphates/graphene oxide (NiPOGO) and sea urchin-like nickel phosphates/chemically converted graphene (NiPOG) substrates. The obtained structure of nickel phosphates depends on the influence of different kinds of oxygen-containing groups on the graphene substrate. The substrate can also affect the particle size and distribution of nickel phosphate nanoparticles. The substrate can adjust the particle size, distribution, and exposed growth direction of nickel phosphide. These materials with high activity are employed as electrochemical catalysts for methanol oxidation reactions, which is ∼7 times that of pure nickel phosphide, and there is a very small Tafel slope of 47 mV decade in the water oxidation reaction. Our results highlight that the substrate structure is essential to catalytic materials for electrochemical oxidation of methanol and water.
掺杂核壳型镍磷/石墨烯纳米材料是通过花状磷酸镍/氧化石墨烯（NiPOGO）和海胆状磷酸镍/化学转化石墨烯（NiPOG）基底的 H 还原得到的。所得到的磷酸镍结构取决于不同种类含氧基团对石墨烯基底的影响。基底还可以影响磷酸镍纳米颗粒的粒径和分布。基底可以调节镍磷化物的粒径、分布和暴露的生长方向。这些具有高活性的材料被用作甲醇氧化反应的电化学催化剂，其活性是纯镍磷的 7 倍，在水氧化反应中 Tafel 斜率非常小，为 47 mV decade。我们的结果强调了基底结构对于甲醇和水的电化学氧化催化材料是至关重要的。
