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

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL AIChE Journal Pub Date : 2025-02-24 DOI:10.1002/aic.18763

Chunzhu Bao, Bolong Yang, Lingling Zhai, Zhonghua Xiang

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Abstract

Proton exchange membrane fuel cells (PEMFCs) are regarded as a cornerstone of next-generation energy conversion technologies due to zero emission and high energy efficiency. However, the high cost and scarcity of conventional Pt-based electrocatalysts hinder its commercialization. Herein, we successfully developed a platinum and cobalt bimetallic covalent organic polymer (Pt-CoNC) electrocatalyst with low Pt loading (0.96 wt%) for the oxygen reduction reaction (ORR) by integrating Pt sites with carbon materials featuring Co-N₄ active centers. This unique structural design not only effectively mitigates the high cost associated with Pt-based catalysts but also notably boosts the activity and stability of non-precious metal catalysts. The results verified that the half-wave potential of Pt-CoNC in the acidic ORR was increased by 105 mV as compared with pure cobalt phthalocyanine-based covalent organic polymer (COP-Co). Furthermore, the as-assembled PEMFC device achieved a peak power density of 1.14 W cm⁻² under an H₂-O₂ atmosphere, which is comparable to commercialized 20% Pt/C catalysts.

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.