Dual‐Site Synergistic Ultrathin Pt‐Based High‐Entropy Alloy Nanosheets Enabling High‐Performance Industrial Alkaline HER
Abstract
ABSTRACT Two‐dimensional (2D) Pt‐based high‐entropy alloys (HEAs) are promising electrocatalysts due to fully exposed active surfaces and tunable multi‐element synergy. However, synthesizing such ultrathin, homogeneous nanostructures remains a formidable challenge, as conventional methods struggle to overcome the intrinsic anisotropic growth tendencies of Pt‐based systems. Herein, we develop a nucleation‐controlled strategy using Pd as structural template to achieve ultrathin PtPdRuNiInSn HEA nanosheets with atomic homogeneity. This structure combines maximized surface accessibility with multi‐element synergy, delivering exceptional alkaline hydrogen evolution activity of 16.5 A mg −1 at −70 mV versus RHE, a 19.6‐fold enhancement over Pt/C. Operando spectroscopy and DFT calculations reveal that Pt/Pd/Ru sites optimize H* adsorption while Ni/In/Sn sites facilitate OH* activation, synergistically lowering the reaction barriers. The entropy‐stabilized configuration demonstrates outstanding durability (negligible activity loss after 50000 cycles) and industrial viability, enabling anion‐exchange membrane electrolyzers to operate steadily for 2500 hours at 1 A cm −2 . This work establishes a general paradigm for designing advanced Pt‐based 2D high‐entropy electrocatalysts.
Article Details
Authors (16)
Rui Li
Yixuan Li
Yaohui Zhao
Interdisciplinary Research Center of Frontier Science and Technology Xi'an Jiaotong University Xi'an Shaanxi China
Yaming Liu
Mamutjan Tursun
College of Chemistry and Environmental Science Kashgar University Kashgar China
Yanan Li
NHC Key Laboratory of Biotechnology for Microbial Drugs
Yuan Ren
Zixin Ge
Frontier Institute of Science and Technology and State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an China
Qian Wang
Junhao Lu
Frontier Institute of Science and Technology and State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an China
Anyu Feng
Interdisciplinary Research Center of Frontier Science and Technology Xi'an Jiaotong University Xi'an Shaanxi China
Chenyao Xiao
Interdisciplinary Research Center of Frontier Science and Technology Xi'an Jiaotong University Xi'an Shaanxi China
Yangzi Zheng
Frontier Institute of Science and Technology and State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an China
Shangdong Ji
Frontier Institute of Science and Technology and State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an China
Qi Zhan
State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu
Mingshang Jin
Frontier Institute of Science and Technology and State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an China