摘要
IrOx-based catalysts are considered the most promising candidates for oxygen evolution reaction(OER)due to their high efficiency.However,improving their intrinsic catalytic activity is essential for practical application.In this work,CeO_(2)with three different morphologies(rod,cube,octahedron)and supported IrOx nanoparticles were fabricated,and they display morphology-dependent OER activity.The IrOx/CeO_(2)-rod shows the highest activity;the catalysts have a catalytic activity sequence of rod>cube>octahedron.A plausible mechanism was proposed:the CeO_(2)support with different morphologies modulates the electronic structure of IrOx by the synergistic interaction promoted by oxygen vacancies between the active component and the support,thereby altering the catalytic activity of the IrOx/CeO_(2)catalyst.
基金
Project supported by the National Natural Science Foundation of China(21522106.21971117)
111 Project(B18030)from China
the Open Fund of the State Key Laboratory of Rare Earth Resource Utilization(RERU2019001)
the Functional Research Fund for the Central Universities,Nankai University(ZB19500202)
Beijing-Tianjin-Hebei Collaborative Innovation Project(63201058).
