▎ 摘　　要

Emerging demands for the highly active, durable, and cost-effective trifunctional catalysts for overall water splitting and metal-air batteries in the scientific community. Herein, a novel strategy is demonstrated for the rational design of hierarchical iron cobalt molybdenum sulfide nanoflower encapsulated in nitrogen doped graphene (FeCoMoS@NG) through a facile, cost-effective, and single-step in-situ hydrothermal process. Owing to its hierarchical nanostructures, larger specific surface area, and exclusive porous networks, the optimal FeCoMoS@NG shows excellent catalytic activities for OER eta 10 = 238 mV, HER eta 10 = 137 mV, and ORR (0.83 V vs RHE). Most significantly, PeCoMoS@NG parallel to FeCoMoS@NG water splitting device achieves a cell voltage of 1.58 V at 10 mA cm(-2). Furthermore, FeCoMoS@NG based zinc-air battery endows a high power density of 118 mW cm(-2), and overall water splitting was successfully driven by FeCoMoS@NG based zinc-air battery. This work provides new pathway for designing highly active and durable multifunctional catalysts for energy conversion and storage applications.