Stable Pd-Cu Hydride Catalyst for Efficient Hydrogen Evolution

Yanyan Jia, Tzu Hsi Huang, Shuan Lin, Lisheng Guo, Yu Min Yu, Jeng Han Wang, Kuan Wen Wang, Sheng Dai

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Pd has been regarded as one of the alternatives to Pt as a promising hydrogen evolution reaction (HER) catalyst. Strategies including Pd-metal alloys (Pd-M) and Pd hydrides (PdHx) have been proposed to boost HER performances. However, the stability issues, e.g., the dissolution in Pd-M and the hydrogen releasing in PdHx, restrict the industrial application of Pd-based HER catalysts. We here design and synthesize a stable Pd-Cu hydride (PdCu0.2H0.43) catalyst, combining the advantages of both Pd-M and PdHx structures and improving the HER durability simultaneously. The hydrogen intercalation is realized under atmospheric pressure (1.0 atm) following our synthetic approach that imparts high stability to the Pd-Cu hydride structure. The obtained PdCu0.2H0.43 catalyst exhibits a small overpotential of 28 mV at 10 mA/cm2, a low Tafel slope of 23 mV/dec, and excellent HER durability due to its appropriate hydrogen adsorption free energy and alleviated metal dissolution rate.

Original languageEnglish
Pages (from-to)1391-1397
Number of pages7
JournalNano Letters
Volume22
Issue number3
DOIs
StatePublished - 9 Feb 2022

Keywords

  • Pd-Cu hydrides
  • Pd-based catalysts
  • electrocatalysis
  • hydrogen adsorption free energy
  • hydrogen evolution reaction

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