青岛科技大学主页平台管理系统于薛刚--于薛刚-- Ce-doped NiFe layered double hydroxide coated NiMoOxS4-x compounds: an efficient OER catalyst in alkaline solution

Ce-doped NiFe layered double hydroxide coated NiMoOxS4-x compounds: an efficient OER catalyst in alkaline solution

发布时间：2024-01-19点击次数：

关键字：OXYGEN-EVOLUTION ELECTROCATALYSTS; BIFUNCTIONAL ELECTROCATALYST; HIERARCHICAL NANOCOMPOSITE; NICKEL FOAM; PERFORMANCE; NANOSHEETS; NITRIDE; CO3O4; ARRAY
摘要：It is of great significance to develop stable, high performance and low cost OER catalysts to solve the energy crisis in the future. In this work, NiMoOxS4-x nanorods with oxygen defects were prepared on nickel foam as a conductive substrate, and then Ce doped NiFe LDH microspheres were combined on the surface to form a unique core-shell structure. At the current density of 100 mA cm(-2), the overpotential in 1 M KOH was 190 mV. The Tafel slope was only 37.1 mV dec(-1). The prepared OER catalyst showed excellent electrochemical performance. The unique structure increased the number of active sites and could adsorb more oxygen-containing intermediates. At the same time, abundant high energy amorphous states and defect sites were generated due to the Ce doping, which can increase the charge transfer rate. In addition, the strong electron coupling and synergistic effect existing between the Ce-NiFe LDH and NiMoOxS4-x can also accelerate the OER dynamics, enabling the rapid formation and release of bubbles. These results indicate that exploring the effect of lanthanide metal doping on OER performance is successful, providing a plan for achieving the hydrogen energy economy in the future.
卷号：8
期号：11
是否译文：否

论文成果

个人信息