Design and Optimization of Anode Catalysts for Direct Ethanol Fuel Cells: Advances and Challenges in C-C Bond Activation and Selective Modulation of the C1 Pathway

Authors

Kai-Chi Qin, Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Faculty of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, PR China.
Meng-Tian Huo, Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Faculty of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, PR China.
Yu Liang, Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Faculty of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, PR China.
Si-Yuan Zhu, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Ave., Singapore 639798, Singapore.
Zi-Hao Xing, Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Faculty of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, PR China.Follow
Jin-Fa Chang, Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Faculty of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun 130024, PR China.Follow

Document Type

Review

Corresponding Author(s)

Zi-Hao Xing(xingzh612@nenu.edu.cn);
Jin-Fa Chang(changjinfa@nenu.edu.cn)

Abstract

Direct ethanol fuel cells (DEFCs) are a promising alternative to conventional energy sources, offering high energy density, environmental sustainability, and operational safety. Compared to methanol fuel cells, DEFCs exhibit lower toxicity and a more mature preparation process. Unlike hydrogen fuel cells, DEFCs provide superior storage and transport feasibility, as well as cost-effectiveness, significantly enhancing their commercial viability. However, the stable C–C bond in ethanol creates a high activation energy barrier, often resulting in incomplete electrooxidation. Current commercial platinum (Pt)- and palladium (Pd)-based catalysts demonstrate low C–C bond cleavage efficiency (< 7.5%), severely limiting DEFC energy output and power density. Furthermore, high catalyst costs and insufficient activity impede large-scale commercialization. Recent advances in DEFC anode catalyst design have focused on optimizing material composition and elucidating catalytic mechanisms. This review systematically examines developments in ethanol electrooxidation catalysts over the past five years, highlighting strategies to improve C1 pathway selectivity and C–C bond activation. Key approaches, such as alloying, nanostructure engineering, and interfacial synergy effects, are discussed alongside their mechanistic implications. Finally, we outline current challenges and future prospects for DEFC commercialization.

Graphical Abstract

Keywords

direct ethanol fuel cells, ethanol electrooxidation, C-C bond cleavage, electrocatalysis, anode catalysts

DOI

10.61558/2993-074X.3565

Online Date

6-3-2025

Recommended Citation

Kai-Chi Qin, Meng-Tian Huo, Yu Liang, Si-Yuan Zhu, Zi-Hao Xing, Jin-Fa Chang. Design and Optimization of Anode Catalysts for Direct Ethanol Fuel Cells: Advances and Challenges in C-C Bond Activation and Selective Modulation of the C1 Pathway[J]. Journal of Electrochemistry, doi: 10.61558/2993-074X.3565.