Yao Yancai, Zhao Long, Dai Jie, Wang Jiaxian, Fang Chuyang, Zhan Guangming, Zheng Qian, Hou Wei, Zhang Lizhi
School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
Key Laboratory of Pesticide & Chemical Biology of Ministry of Education Institute of Applied & Environmental Chemistry College of Chemistry, Central China Normal University, Wuhan, 430079, P. R. China.
Angew Chem Int Ed Engl. 2022 Oct 10;61(41):e202208215. doi: 10.1002/anie.202208215. Epub 2022 Sep 12.
Fabricating single-atom electrodes via atomic dispersion of active metal atoms into monolithic metal supports is of great significance to advancing the lab-to-fab translation of the electrochemical technologies. Here, we report an inherent oxide anchoring strategy to fasten ligand-free isolated Ru atoms on the amorphous layer of monolithic Ti support by regulating the electronic metal-support interactions. The prepared Ru single atom electrode exhibited exceptional electrochemical chlorine evolution activity, three orders of magnitude higher mass activity than that of commercial dimensionally stable anode, and also selectively reduced nitrate to ammonia with an unprecedented ammonia yield rate of 22.2 mol g h at -0.3 V. Furthermore, the Ru single atom monolithic electrode can be scaled up from 2×2 cm to 25×15 cm at least, thus demonstrating great potential for industrial electrocatalytic applications.
通过将活性金属原子原子分散到整体金属载体中制备单原子电极，对于推动电化学技术从实验室规模向工业规模转化具有重要意义。在此，我们报道了一种固有的氧化物锚定策略，通过调节电子金属-载体相互作用，将无配体的孤立钌原子固定在整体钛载体的非晶层上。所制备的钌单原子电极表现出优异的电化学析氯活性，质量活性比商业尺寸稳定阳极高三个数量级，并且在-0.3 V时还能将硝酸盐选择性还原为氨，氨产率高达22.2 mol g h，前所未有的高。此外，钌单原子整体电极至少可以从2×2 cm扩大到25×15 cm，从而显示出在工业电催化应用中的巨大潜力。
