Heterojunction-Based Electron Donators to Stabilize and Activate Ultrafine Pt Nanoparticles for Efficient Hydrogen Atom Dissociation and Gas Evolution

Lu Han Sun, Qi Yuan Li, Shi Nan Zhang, Dong Xu, Zhong Hua Xue, Hui Su, Xiu Lin, Guang Yao Zhai, Peng Gao, Shin Ichi Hirano, Jie Sheng Chen, Xin Hao Li*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

Platinum (Pt) is the most effective bench-marked catalyst for producing renewable and clean hydrogen energy by electrochemical water splitting. There is demand for high HER catalytic activity to achieve efficient utilization and minimize the loading of Pt in catalysts. In this work, we significantly boost the HER mass activity of Pt nanoparticles in Ptx/Co to 8.3 times higher than that of commercial Pt/C by using Co/NC heterojunctions as a heterogeneous version of electron donors. The highly coupled interfaces between Co/NC and Pt metal enrich the electron density of Pt nanoparticles to facilitate the adsorption of H+, the dissociation of Pt−H bonds and H2 release, giving the lowest HER overpotential of 6.9 mV vs. RHE at 10 mA cm−2 in acid among reported HER electrocatalysts. Given the easy scale-up synthesis due to the stabilization of ultrafine Pt nanoparticles by Co/NC solid ligands, Ptx/Co can even be a promising substitute for commercial Pt/C for practical applications.

Original languageEnglish (US)
Pages (from-to)25766-25770
Number of pages5
JournalAngewandte Chemie - International Edition
Volume60
Issue number49
DOIs
StatePublished - Dec 1 2021

Keywords

  • heterogeneous catalysis
  • hydrogen evolution
  • Schottky barrier
  • ultrafine Pt nanoparticles

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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