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Received July 19, 2022
Revised December 9, 2022
Accepted January 31, 2023
- Acknowledgements
- This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (2021M3 H4A1A02042948, 2021M3H4A3A02086681). This work was also supported by the New & Renewable Energy Core Technology Program of KETEP (20203020030010) in Korea
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Current progress of electrocatalysts for anion exchange membrane fuel cells
1Hydrogen Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Korea 2Division of Energy & Environmental Technology, KIST School, University of Science and Technology (UST), Daejeon 34113, Korea 3KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Korea 4Energy and Environment Laboratory, Korea Electric Power Corp. Research Institute, Daejeon 34056, Korea
ysj@kist.re.kr
Korean Journal of Chemical Engineering, July 2023, 40(7), 1549-1562(14), 10.1007/s11814-023-1444-9
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Abstract
The transition from a carbon-centered economy to an era of renewable energy has led to global attention
on hydrogen energy, ultimately leading to the development of fuel cells using hydrogen as a fuel. In response to global
demand, overall fuel cell technology has grown remarkably over the past few years; yet, commercialization remains
sluggish owing to cost. As the cathode of a proton exchange membrane fuel cell (PEMFC), which is the most commercialized fuel cell, is markedly dependent on platinum (Pt), anion exchange membrane fuel cells (AEMFCs), which can
utilize non-precious materials as cathode catalysts, have emerged as a promising alternative. Earth-abundant metals are
used as cathode catalysts, and metal-free materials are used to achieve comparable performance to Pt. Compared to the
single-cell performance of Pt catalysts, a gap still exists; however, the applicability of non-noble metals has been extensively evaluated. If catalyst development is accompanied by efficient electrode structure design, a significant part of the
cost problem can be overcome. AEMFCs have advantages in the ORR of cathodes compared to PEMFCs; however, the
HOR kinetics are quite sluggish. Therefore, the design of HOR catalysts requires another approach, not only to
enhance their intrinsic activity, but also consider the poisoning induced by the use of ionomers besides PEMFCs.
Therefore, a strategy based on the HOR pathway is required to lower the barrier of the rate-determining step. In this
review, catalysts for AEMFCs were introduced based on their classification, and information on recent trends and issues
related to catalysts was presented.
Keywords
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