摘要
Water electrolysis is a sustainable and environmentally benign process for energy conversion and production.The oxygen evolution reaction(OER),the anode reaction,is slower during water electrolysis than the hydrogen evolution reaction,the cathode reaction,because of the necessary four-electron transfer process.Therefore,exploring highly efficient OER catalysts is crucial for advancing the electrochemical water splitting reaction.
电解水能够为我们提供清洁可持续的能源,这对生态环境系统大有裨益.因此,在电解水体系中,开发新型有效的析氧催化剂迫在眉睫.本文首先通过自下而上的方法合成Au@ZIF-67,再对其进行控温处理得到纳米复合物Au@ZIF-67-500.通过扫描电子显微镜、透射电子显微镜、X射线光电子能谱和紫外光谱等一系列测试手段揭示了材料的纳米结构形貌及其表面电子分布.在1.0 mol L^(−1)KOH电解液中,利用三电极体系进行了电催化性能的测试.结果显示,该纳米复合物在催化析氧反应过程中呈现出良好的催化活性和较好的稳定性.这一结果可以归功于三方面的协同作用:金纳米粒子的包覆、多孔结构和有效的热控制.这种通过简单方法制备的析氧催化剂对能量转换领域具有一定的借鉴意义.
基金
This work was supported by the National Natural Science Foundation of China(NSFC,21901221 and 21671170)
the Natural Science Foundation of Jiangsu Province(BK20190870)
Changjiang Scholars Program of the Ministry of Education(Q2018270)
Lvyangjinfeng Talent Program of Yangzhou and Six Talent Peaks Project of Jiangsu Province.
