Pd-NPs@alkyne-PVA/GO复合材料制备及其电催化析氢性能

开发高效、稳定的电催化剂是实现电解水制氢反应(HER)的关键。成功制备以炔基化的聚乙烯醇(alkyne-PVA)改性的单层氧化石墨烯(GO)载体,以硼氢化钠为还原剂,将钯纳米颗粒(Pd-NPs)负载在碳基材料上,合成Pd-NPs@alkyne-PVA/GO复合材料。通过SEM、TEM、XRD、N₂吸附-脱附和XPS对所合成物质的形貌、结构、比表面积及孔径进行分析;采用电化学工作站测试催化剂的线性扫描伏安曲线(LSV)和Tafel 斜率,分析所合成催化剂的电催化析氢性能。结果表明Pd-NPs@alkyne-PVA/GO复合材料在酸性电解质中的电催化性能较好,其在电流密度为-10 mA·cm^-2时,过电位仅为-80 mV。

Preparation of Pd-NPs@alkyne-PVA/GO composite and its electrocatalytic hydrogen evolution reaction performance

The development of efficient and stable electrocatalysts is the key to the realization of electrolytic water hydrogen evolution reaction (HER).In this work,Pd-NPs@alkyne-PVA/GO composite was succe-ssfully prepared by using alkylenized polyvinyl alcohol (alkyne-PVA) modified single-layer graphene oxide (GO) as support material and sodium borohydride as reducing agent.The morphology,structure,specific surface area and pore diameter of the synthesized materials were analyzed by SEM,TEM,XRD,N₂ adsorption-desorption,and XPS.Electrochemical workstation was used to test the linear sweep voltammetry curve (LSV) and Tafel slope of the catalyst to analyze the electrocatalytic HER performance of the synthesized catalyst.The results show that Pd-NPs@alkyne-PVA/GO composite has a good electrocatalytic performance in acidic electrolyte,the overpotential is only -80 mV at current density of -10 mA·cm^-2.