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Peer-reviewedCC BY-NC-ND 4.0ACS Omega

Elucidating the Action Mechanism of the Carbon Substrate in Pt/C-Catalyzed Alkaline Hydrogen Evolution Reaction

  • Chao Shuai1,2
  • Yanxia Han1,2
  • Lijie Hou1,2
  • Yingying Li1,2
  • Chao Kong1,2
  1. 1Longdong University , , ,
  2. 2Gansu Key Laboratory of Efficient Utilization of Oil and Gas Resources in Longdong , ,
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Abstract

In the alkaline hydrogen evolution reaction (HER), loading Pt on a carbon substrate can markedly enhance its activity. Electrochemical tests show that the Tafel slopes of Pt/C and Pt mesh are 73 and 171 mV dec–1, respectively, which indicate the HER mechanisms on Pt/C and Pt are different. In alkaline media, the HER on Pt is limited by H2O dissociation. Therefore, in this paper, the effect of the carbon substrate on the H2O dissociation process on a Pt cluster was systematically studied by density functional theory (DFT) calculations. The results indicate that the electron redistribution of the Pt cluster caused by the carbon substrate can enhance the Lewis acidity of the active site, thereby accelerating H2O dissociation step on the Pt cluster. Therefore, promoting the H2O dissociation step on Pt by the carbon substrate is one of the prime reasons for the eminent activity of Pt/C in the alkaline HER.

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Cite

BibTeXRIS
BibTeX
@article{shuai2026elucidating,
  title = {{Elucidating the Action Mechanism of the Carbon Substrate in Pt/C-Catalyzed Alkaline Hydrogen Evolution Reaction}},
  author = {Chao Shuai and Yanxia Han and Lijie Hou and Yingying Li and Chao Kong},
  journal = {ACS Omega},
  year = {2026},
  month = oct,
  doi = {10.1021/acsomega.6c08990},
  url = {https://pubs.acs.org/acsodf/article/11/42/65729/5450174/Elucidating-the-Action-Mechanism-of-the-Carbon},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - JOUR
TI  - Elucidating the Action Mechanism of the Carbon Substrate in Pt/C-Catalyzed Alkaline Hydrogen Evolution Reaction
AU  - Chao Shuai
AU  - Yanxia Han
AU  - Lijie Hou
AU  - Yingying Li
AU  - Chao Kong
PY  - 2026
DA  - 2026/10/13
JO  - ACS Omega
DO  - 10.1021/acsomega.6c08990
UR  - https://pubs.acs.org/acsodf/article/11/42/65729/5450174/Elucidating-the-Action-Mechanism-of-the-Carbon
AB  - In the alkaline hydrogen evolution reaction (HER), loading Pt on a carbon substrate can markedly enhance its activity. Electrochemical tests show that the Tafel slopes of Pt/C and Pt mesh are 73 and 171 mV dec–1, respectively, which indicate the HER mechanisms on Pt/C and Pt are different. In alkaline media, the HER on Pt is limited by H2O dissociation. Therefore, in this paper, the effect of the carbon substrate on the H2O dissociation process on a Pt cluster was systematically studied by density functional theory (DFT) calculations. The results indicate that the electron redistribution of the Pt cluster caused by the carbon substrate can enhance the Lewis acidity of the active site, thereby accelerating H2O dissociation step on the Pt cluster. Therefore, promoting the H2O dissociation step on Pt by the carbon substrate is one of the prime reasons for the eminent activity of Pt/C in the alkaline HER.
SN  - 2470-1343
ER  -