Chem. Commun., 2025, Advance Article DOI: 10.1039/D5CC04506A, Communication Chi Zhang, Xin Cheng, Qikai Shi, Shengming Li, Yue Shi, Yuying Chen, Zhiyan Yuan, Chengjiao Zhang, Jianfeng Ju, Xiaolei Yuan The PtCoOx/C catalyst with dual interfaces of PtCo–CoOx and PtCo–C achieved a high current density of 18.4 mA cm−2.