清华大学陈晨团队报道了Co单原子插入RuO₂球制备一种强大的双功能电催化剂用于HER和OER。相关研究成果于2021年11月24日发表在国际顶尖学术期刊《德国应用化学》。

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重要目标，但仍然具有挑战性。

该文中，研究人员报告了一种用于HER和OER的高效、稳定催化剂，该催化剂由Co单原子插入RuO₂球中，其中RuO₂球体中的Co单原子通过XAS、AC-STEM和DFT得到确认。该剪裁策略使用Co单原子修饰周围Ru原子的电子结构，从而显著提高电催化活性。催化剂需要超低过电位，HER为45mV，OER为200 mV，以提供10mA/cm²的电流密度。理论计算表明，掺入钴单原子后，HER和OER的势垒降低。

附：英文原文

Title: Cobalt Single Atom Incorporated in Ruthenium Oxide Sphere: A Robust Bifunctional Electrocatalyst for HER and OER

Author: Khadim Shah, Ruoyun Dai, Muhammad Mateen, Zubair Hassan, Zewen Zhuang, Chuhao Liu, Muhammad Israr, Weng-Chon Cheong, Botao Hu, Renyong Tu, Chao Zhang, Xin Chen, Qing Peng, Chen Chen, Yadong Li

Issue&Volume: 2021-11-24

Abstract: The development of highly active and stable bifunctional noble-metal-based electrocatalysts for hydrogen evolution reaction (HER) and 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 Co single atom incorporated in RuO2 sphere for HER and OER, in which Co single atom in the RuO2 sphere were confirmed by XAS, AC-STEM, and DFT. This tailoring strategy uses 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 10 mA/cm2 current density. The theoretical calculations reveal that the energy barriers for HER and OER are lowered after incorporation of cobalt single atom.

DOI: 10.1002/anie.202114951

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202114951