Wang Na, Tao Bairui, Miao Fengjuan, Zang Yu
College of Communications and Electronics Engineering, Qiqihar University Heilongjiang 161006 China
College of Materials Science and Engineering, Qiqihar University Wenhua Street 42 Qiqihar China.
RSC Adv. 2019 Oct 21;9(58):33814-33822. doi: 10.1039/c9ra05335b. eCollection 2019 Oct 18.
Efficient electrocatalysts are crucial to water splitting for renewable energy generation. In this work, electrocatalytic hydrogen evolution from Pd nanoparticle-modified graphene nanosheets loaded on ZnO nanowires on nickel foam was studied in an alkaline electrolyte. The high electron mobility stems from the cylindrical ZnO nanowires and the rough surface on the graphene/ZnO nanowires increases the specific surface area and electrical conductivity. The catalytic activity arising from adsorption and desorption of intermediate hydrogen atoms by Pd nanoparticles improves the hydrogen evolution reaction efficiency. As a hydrogen evolution reaction (HER) catalyst, the Pd/graphene/ZnO/Ni foam (Pd/G/ZnO/NF) nanocomposite exhibits good stability and superior electrocatalytic activity. Linear sweep voltammetry (LSV) revealed an overpotential of -31 mV and Tafel slope of 46.5 mV dec in 1 M KOH. The economical, high-performance, and environmentally friendly materials have excellent prospects in hydrogen storage and hydrogen production.
高效电催化剂对于可再生能源发电的水分解至关重要。在这项工作中，研究了负载在泡沫镍上的ZnO纳米线上的钯纳米颗粒修饰的石墨烯纳米片的电催化析氢性能，该实验在碱性电解质中进行。高电子迁移率源于圆柱形ZnO纳米线，并且石墨烯/ZnO纳米线上的粗糙表面增加了比表面积和电导率。钯纳米颗粒对中间氢原子的吸附和解吸所产生的催化活性提高了析氢反应效率。作为析氢反应（HER）催化剂，钯/石墨烯/ZnO/泡沫镍（Pd/G/ZnO/NF）纳米复合材料表现出良好的稳定性和优异的电催化活性。线性扫描伏安法（LSV）显示在1 M KOH中过电位为-31 mV，塔菲尔斜率为46.5 mV dec。这种经济、高性能且环保的材料在储氢和制氢方面具有优异的前景。
