Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (9): 20260146.doi: 10.7503/cjcu20260146

• Physical Chemistry • Previous Articles     Next Articles

Synthesis of Two-dimensional PdIr2 Alloy Nanosheets for Enhanced Alkaline Hydrogen Evolution Reaction Performance

TAO Qingmei, CHENG Hao, DENG Peifeng, ZHANG Weichen, WANG Yunxing, LIU Jialun, CAO Xuye, YANG Zhenzhen(), ZHANG Genlei()   

  1. School of Chemistry and Chemical Engineering,Hefei University of Technology,Hefei 230009,China
  • Received:2026-04-08 Online:2026-09-10 Published:2026-05-17
  • Contact: YANG Zhenzhen E-mail:zzyang@hfut.edu.cn;genleizhang@hfut.edu.cn
  • Supported by:
    the Natural Science Foundation of Anhui Province, China(JZ2023AKZR0560, JZ2024AKZR0546)

Abstract:

In recent years, the electrochemical hydrogen evolution reaction(HER) has emerged as a promising approach for sustainable hydrogen production. Among various catalysts, Pd-based materials are regarded as one kind of the most promising alternatives to Pt-based counterparts. However, the excessively strong adsorption of hydrogen intermediates on Pd surfaces limits their HER efficiency. In this study, the two-dimensional PdIr2 alloy nanosheets was synthesized via an organic-precursor decomposition method. The formation of the alloy structure effectively modulates the electronic configuration of Pd, thereby enhancing its alkaline HER performance. Electrochemical measurements show that the PdIr2 alloy nanosheet catalyst achieves an overpotential of only 19 mV at a current density of 10 mA/cm2 and a Tafel slope of 51.4 mV/dec, significantly outperforming commercial Pt/C and commercial Pd/C catalysts. In addition, the catalyst exhibits excellent long-term stability, with a voltage decay of only 63 mV over 136 h(average decay rate of 0.46 mV/h). Notably, the decay voltage remains within 10 mV over the final 116 h, demonstrating superior stability compared to the reference catalysts.

Key words: Pd-based catalyst, PdIr Alloy, Two-dimensional nanosheet, Hydrogen evolution reaction(HER) in alkaline

CLC Number: 

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