Substrate Effect of Platinum-Decorated Carbon on Enhanced Hydrogen Oxidation in PEMFC
- Title
- Substrate Effect of Platinum-Decorated Carbon on Enhanced Hydrogen Oxidation in PEMFC
- Author
- 서정길
- Keywords
- MEMBRANE FUEL-CELLS; DENSITY-FUNCTIONAL THEORY; TUNGSTEN CARBIDE; NANOTUBES; CATALYST; ELECTROCATALYSTS; REDUCTION; MECHANISM; METHANOL; SUPPORT
- Issue Date
- 2020-10
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS OMEGA, v. 5, no. 41, page. 26902-26907
- 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.
- URI
- https://pubs.acs.org/doi/10.1021/acsomega.0c04131https://repository.hanyang.ac.kr/handle/20.500.11754/171875
- ISSN
- 2470-1343
- DOI
- 10.1021/acsomega.0c04131
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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