塔里木大学学报2024，Vol.36Issue(1)：28-36,9.DOI:10.3969/j.issn.1009-0568.2024.01.004
异质纳米结构NiO/KNbO3增强析氢催化反应
Heterogeneous nanostructured NiO/KNbO3 for enhanced hydrogen evolution reaction
摘要
Abstract
The design of low-cost,efficient and long-term stable catalysts for hydrogen evolution reaction(HER)is crucially important for the industrial implementation of water-splitting technology.In this study,a NiO/KNbO3 catalyst with heterogeneous nanostructures was prepared using a sol-gel method combined with subsequent thermal decomposition.The crystal structure,valence state of the ele-ments,micromorphology,and HER catalytic performance of the catalyst were systematically analyzed using X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM),transmission electron microscopy(TEM),and an electro-chemical workstation(CHI660E).The results showed that the catalyst exhibited excellent HER catalytic performance in a 1 mol/L KOH electrolyte,with an overpotential of only-217 mV at a current density of-10 mA/cm2,corresponding to a Tafel slope of 77.4 mV/dec.Moreover,the catalyst demonstrated good catalytic stability and corrosion resistance in a 24-hour constant potential HER stability test.The excellent catalytic performance for HER of NiO/KNbO3 catalyst was ascribed to the synergistic effect of NiO and KNbO3,as well as the unique heterogeneous nanocomposite structure,which increased the exposure of active sites and improved the ion transport pathways.关键词
电解水/析氢反应/催化剂/NiO/KNbO3Key words
water-splitting/hydrogen evolution reaction/catalyst/NiO/KNbO3分类
化学化工引用本文复制引用
张京京,陈静雯,陈亚辉,胡立兵,朱纪奎..异质纳米结构NiO/KNbO3增强析氢催化反应[J].塔里木大学学报,2024,36(1):28-36,9.基金项目
塔里木大学校长基金硕士项目(TDZKSS202230) （TDZKSS202230）
