Structural Regulation of a Multi‐Component Co2P2O7‐MoN/NC Electrocatalyst for Efficient Oxygen Evolution Reaction.

Realizing efficient and durable non‐precious metal‐based electrocatalysts for oxygen evolution reaction (OER) still remains a great challenge. Here, a multi‐component composite of Co2P2O7‐MoN/NC containing pyrophosphate, nitride, and nitrogen‐doped carbon is successfully prepared via a facile two‐step synthesis method. Combining the structural regulation between the active metal‐ and non‐metal‐based species, Co2P2O7‐MoN/NC demonstrates superior activity and durability for OER, requiring an overpotential of 278 mV at a current density of 10 mA cm−2, a Tafel slope of 83.3 mV dec−1, and long‐term stability over 100 h in an alkaline solution. Post‐characterizations reveal that synergistic effect among stable Co2P2O7, partially dissolved MoN, N‐doped carbon, and new‐formed CoOOH nanosheets enable structural reconstruction, fast charge transfer, and formation of oxygen‐containing intermediates, promoting the OER performance significantly. This work provides a promising pathway to tune multi‐components to fabricate efficient transition‐metal‐based electrocatalysts in energy conversion applications. [ABSTRACT FROM AUTHOR]