Atomic Dispersion of Rh on Interconnected Mo₂C Nanosheet Network Intimately Embedded in 3D NixMoOy Nanorod Arrays for pH‐Universal Hydrogen Evolution

Herein, a simple synthetic approach is employed for the atomic dispersion of Rh atoms (Rh SAs) over the surface of interconnected Mo 2 C nanosheets intimately embedded in a three‐dimensional Ni x MoO y nanorod arrays (Ni x MoO y NRs) framework; we found that the introduction of both isolated Rh SAs and Ni x MoO y NRs adjusts the electrocatalytic function of the host Mo 2 C toward the direction of being an advanced and highly stable electrocatalyst for efficient hydrogen evolution at pH‐universal conditions. As a result, the proposed catalyst outperforms most recently reported transition metal‐based catalysts, and its performance even rivals that of commercial Pt/C, as demonstrated by its ultralow overpotentials of 31.7, 109.7, and 95.4 mV at a current density of 10 mA cm −2 , along with its small Tafel slopes of 42.4, 51.2, and 46.8 mV dec −1 in acidic, neutral, and alkaline conditions, respectively. In addition, the catalyst shows remarkable long‐term stability over all pH values with good maintenance of its catalytic activity and structural characteristics after continuous operation.