Substrate Effect of Platinum-Decorated Carbon on Enhanced Hydrogen Oxidation in PEMFC
- Authors
- Kim, Taeyoon; Kwon, Yongju; Kwon, Soonchul; Seo, Jeong Gil
- Issue Date
- Oct-2020
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS OMEGA, v.5, no.41, pp.26902 - 26907
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS OMEGA
- Volume
- 5
- Number
- 41
- Start Page
- 26902
- End Page
- 26907
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/32745
- DOI
- 10.1021/acsomega.0c04131
- ISSN
- 2470-1343
- Abstract
- Environmentally sustainable fuel cells with high efficiency have attracted much attention as a promising approach to resolving future energy problems. However, some obstacles must be overcome, such as corrosion, water control, and long-term degradation. Herein, we investigated the improved electrochemical performance and hydrogen oxidation reaction (HOR) mechanism of platinum loaded on carbon nanotube (Pt/CNT) catalyst by conducting experimental and theoretical studies. The Pt/CNT catalyst had a larger active area than the Pt/C (platinum loaded on carbon black) catalyst and also exhibited improved performance due to its long-term stability. In addition, the charge-transfer resistance of Pt/CNT (61.2 Omega cm(2)) is much smaller than that of Pt/C (90.2 Omega cm(2)), indicating that the CNT support offers good electron transfer. To further understand the hydrogen dissociation mechanisms of Pt/CNT and Pt/C, we investigated the adsorption characteristics and electron transfer of the catalysts with optimized geometry using the density functional theory (DFT). Pt/CNT exhibited higher adsorption energy and electron transfer than Pt/C, which leads to improved HOR. The integrated experimental and theoretical study conducted here suggests that Pt/CNT is a promising candidate for maintaining the performance of cathode catalysts in the polymer electrolyte membrane fuel cell.
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