CoN₄ active sites coupled with low‐loading Pt as advanced oxygen electrocatalyst for proton exchange membrane fuel cells

AIChE Journal, Год журнала: 2025, Номер unknown

Опубликована: Фев. 24, 2025

Abstract Proton exchange membrane fuel cells (PEMFCs) are regarded as a cornerstone of next‐generation energy conversion technologies due to zero emission and high efficiency. However, the cost scarcity conventional Pt‐based electrocatalysts hinder its commercialization. Herein, we successfully developed platinum cobalt bimetallic covalent organic polymer (Pt‐CoNC) electrocatalyst with low Pt loading (0.96 wt%) for oxygen reduction reaction (ORR) by integrating sites carbon materials featuring Co‐N 4 active centers. This unique structural design not only effectively mitigates associated catalysts but also notably boosts activity stability non‐precious metal catalysts. The results verified that half‐wave potential Pt‐CoNC in acidic ORR was increased 105 mV compared pure phthalocyanine‐based (COP‐Co). Furthermore, as‐assembled PEMFC device achieved peak power density 1.14 W cm −2 under an H 2 ‐O atmosphere, which is comparable commercialized 20% Pt/C

Язык: Английский

First-principles calculations insight into non-noble-metal bifunctional electrocatalysts for zinc–air batteries

Applied Energy, Год журнала: 2025, Номер 391, С. 125925 - 125925

Опубликована: Апрель 13, 2025

Язык: Английский