Shah Khadim, Dai Ruoyun, Mateen Muhammad, Hassan Zubair, Zhuang Zewen, Liu Chuhao, Israr Muhammad, Cheong Weng-Chon, Hu Botao, Tu Renyong, Zhang Chao, Chen Xin, Peng Qing, Chen Chen, Li Yadong
Department of Chemistry, Tsinghua University, Beijing, 100084, China.
College of Environment and Resources, Chongqing Technology and Business University, Chongqing, 400020, China.
Angew Chem Int Ed Engl. 2022 Jan 21;61(4):e202114951. doi: 10.1002/anie.202114951. Epub 2021 Dec 9.
The development of highly active and stable bifunctional noble-metal-based electrocatalysts for the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) is a crucial goal for clean and renewable energy, which still remains challenging. Herein, we report an efficient and stable catalyst comprising a Co single atom incorporated in an RuO sphere for HER and OER, in which the Co single atom in the RuO sphere was confirmed by XAS, AC-STEM, and DFT. This tailoring strategy uses a Co single atom to modify the electronic structures of the surrounding Ru atoms and thereby remarkably elevates the electrocatalytic activities. The catalyst requires ultralow overpotentials, 45 mV for HER and 200 mV for OER, to deliver a current density of 10 mA cm . The theoretical calculations reveal that the energy barriers for HER and OER are lowered after incorporation of a cobalt single atom.
开发用于析氢反应（HER）和析氧反应（OER）的高活性和稳定的双功能贵金属基电催化剂是清洁和可再生能源的一个关键目标，目前这一目标仍具有挑战性。在此，我们报道了一种高效且稳定的催化剂，它由嵌入RuO球壳中的钴单原子组成，用于HER和OER，其中RuO球壳中的钴单原子通过X射线吸收光谱（XAS）、环形暗场扫描透射电子显微镜（AC-STEM）和密度泛函理论（DFT）得到证实。这种定制策略利用钴单原子来修饰周围Ru原子的电子结构，从而显著提高电催化活性。该催化剂在提供10 mA cm的电流密度时，HER的过电位超低，仅为45 mV，OER的过电位为200 mV。理论计算表明，引入钴单原子后，HER和OER的能垒降低。
