TY - JOUR
T1 - Atomic layer deposited Pt/Cu bimetallic catalysts for use in high-performance fuel cell cathodes
AU - Kim, Seong Ji
AU - Seo, Beum Geun
AU - Jeong, Heon Jun
AU - Shim, Joon Hyung
N1 - Funding Information:
This research was supported by the program of Future Hydrogen Original Technology Development (2021M3I3A1084842), through the National Research Foundation of Korea (NRF), funded by the Korean government. (Ministry of Science and ICT[MSIT]).
Funding Information:
Korean government. (Ministry of Science and ICT[MSIT]); National Research Foundation of Korea (NRF); Future Hydrogen Original Technology Development Funding information
Publisher Copyright:
© 2022 John Wiley & Sons Ltd.
PY - 2022/10/10
Y1 - 2022/10/10
N2 - In this study, the performance and durability of a Pt/Cu bimetallic catalyst membrane electrode assembly (MEA) for use in polymer electrolyte membrane fuel cells (PEMFCs)—fabricated via plasma-enhanced atomic layer deposition and sputtering—were investigated. The high production costs of Pt-based catalysts limit the commercialization of PEMFCs. Therefore, research to dramatically reduce the loadings of noble metal catalysts, such as Pt, has steadily progressed. Atomic layer deposition may considerably reduce the amount of supported catalyst by precisely controlling the composition and thickness of the catalyst via a self-limiting reaction. According to D-band theory, the Cu catalyst of the Pt/Cu MEA weakened the bonds between the Pt catalyst and oxygen species and improved the oxygen reduction reaction compared to those of the existing Pt MEA. The performance and electrochemical surface area (ECSA) of the Pt/Cu MEA were determined using I-V measurements and cyclic voltammetry, and the durability of the Pt/Cu MEA was analyzed using electrochemical impedance spectroscopy and the accelerated stress test. Thus, when the Pt/Cu MEA was used, the performance and ECSA were improved, and the impedance decreased, compared to those of the Pt MEA.
AB - In this study, the performance and durability of a Pt/Cu bimetallic catalyst membrane electrode assembly (MEA) for use in polymer electrolyte membrane fuel cells (PEMFCs)—fabricated via plasma-enhanced atomic layer deposition and sputtering—were investigated. The high production costs of Pt-based catalysts limit the commercialization of PEMFCs. Therefore, research to dramatically reduce the loadings of noble metal catalysts, such as Pt, has steadily progressed. Atomic layer deposition may considerably reduce the amount of supported catalyst by precisely controlling the composition and thickness of the catalyst via a self-limiting reaction. According to D-band theory, the Cu catalyst of the Pt/Cu MEA weakened the bonds between the Pt catalyst and oxygen species and improved the oxygen reduction reaction compared to those of the existing Pt MEA. The performance and electrochemical surface area (ECSA) of the Pt/Cu MEA were determined using I-V measurements and cyclic voltammetry, and the durability of the Pt/Cu MEA was analyzed using electrochemical impedance spectroscopy and the accelerated stress test. Thus, when the Pt/Cu MEA was used, the performance and ECSA were improved, and the impedance decreased, compared to those of the Pt MEA.
KW - electrochemical surface area
KW - gas diffusion layer
KW - oxygen reduction reaction
KW - plasma-enhanced atomic layer deposition
KW - polymer electrolyte membrane fuel cell
UR - http://www.scopus.com/inward/record.url?scp=85133771218&partnerID=8YFLogxK
U2 - 10.1002/er.8381
DO - 10.1002/er.8381
M3 - Article
AN - SCOPUS:85133771218
SN - 0363-907X
VL - 46
SP - 17180
EP - 17188
JO - International Journal of Energy Research
JF - International Journal of Energy Research
IS - 12
ER -
