Interconnected Porous Structural Construction of Mn-and N-Doped Carbon Nanosheets for Fuel Cell Application

Shi, Jiawei, Deng, Shibing, Hu, Xinyue, Sun, Xiujuan, Zhou, Shunfa, Fan, Liyuan, Cai, Weiwei, and Li, Jing (2022) Interconnected Porous Structural Construction of Mn-and N-Doped Carbon Nanosheets for Fuel Cell Application. Energy & Fuels, 36 (15). pp. 8432-8438.

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The lack of a cost-effective oxygen reduction reaction (ORR) catalyst is the key technical issue that restricts the large-scale application of proton-exchange membrane fuel cells (PEMFCs). Transition metal–Nx/C has exhibited promising potential to replace the precious Pt-based catalyst, and Mn–Nx/C is becoming the research hotspot as a result of the Fenton-inert property of Mn. To further improve the ORR activity of the Mn–Nx/C catalyst, a three-dimensional (3D) interconnected porous structure is constructed in two-dimensional Mn- and N-doped carbon nanosheets via a “porogen-in-resin” strategy. In combination with a post-adsorption treatment, the so-called 3D Mn–Nx/CS catalyst exhibits great ORR catalytic activity and stability under both acidic and alkaline conditions. The half-wave potential (E1/2) of 3D Mn–Nx/CS is high at 0.918 and 0.720 V under alkaline and acidic conditions, respectively. As a result, the practical PEMFC equipped with 3D Mn–Nx/CS possesses an open circuit voltage above 0.94 V and a maximum power density of 360 mW/cm2, showing a potential application prospect.

Item ID: 76644
Item Type: Article (Research - C1)
ISSN: 1520-5029
Keywords: Catalysts, Electrical properties, Fuel cells, Redox reactions, Transition metals
Copyright Information: © 2022 American Chemical Society
Date Deposited: 31 Oct 2022 06:15
FoR Codes: 40 ENGINEERING > 4004 Chemical engineering > 400404 Electrochemical energy storage and conversion @ 100%
SEO Codes: 17 ENERGY > 1704 Energy transformation > 170401 Fuel cells (excl. solid oxide) @ 100%
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