Lanthanum-Induced Gradient Fields in Asymmetric Heterointerface Catalysts for Enhanced Oxygen Electrocatalysis.

ABSTRACT: Metal-nitrogen-carbon (M-N-C) catalysts display considerable potential as cost-effective alternatives to noble metals in oxygen electrocatalysis. However, uncontrolled atomic migration and random structural rearrangement during pyrolysis often lead to disordered coordination environments and sparse active sites, fundamentally limiting their intrinsic catalytic activities and long-term durability. Herein, a novel strategy is reported for use in directionally regulating atomic migration pathways via the incorporation of a foreign metal (La). By exploiting the differences in the atomic migration priorities via the Kirkendall effect, directional control of atomic diffusion is achieved to fabricate a well-defined asymmetric multiphase heterointerface catalyst (LaN/LaFe-NC). The presence of high

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC12759245 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature