Engineering the Electronic Structure of Submonolayer Pt on Intermetallic Pd3Pb via Charge Transfer Boosts the Hydrogen Evolution Reaction
Journal of the American Chemical Society 141(51):19964-19968 Dec 2019 

Yao, Yancai; Gu, Xiang-Kui; He, Dongsheng; Li, Zhijun; Liu, Wei; Xu, Qian; Yao, Tao; Lin, Yue; Wang, Hui-Juan; Zhao, Changming; Wang, Xiaoqian; Yin, Peiqun; Li, Hai; Hong, Xun; Wei, Shiqiang; Li, Wei-Xue; Li, Yadong; Wu, Yuen


The efficient electrochemical hydrogen evolution reaction (HER) plays a key role in accelerating sustainable H2 production from water electrolysis, but its large-scale applications are hindered by the high cost of the state-of-the-art Pt catalyst. In this work, submonolayer Pt was controllably deposited on an intermetallic Pd3Pb nanoplate (AL-Pt/Pd3Pb). The atomic efficiency and electronic structure of the active surface Pt layer were largely optimized, greatly enhancing the acidic HER. AL-Pt/Pd3Pb exhibits an outstanding HER activity with an overpotential of only 13.8 mV at 10 mA/cm2 and a high mass activity of 7834 A/gPd+Pt at -0.05 V, both largely surpassing those of commercial Pt/C (30 mV, 1486 A/gPt). In addition, AL-Pt/Pd3Pb shows excellent stability and robustness. Theoretical calculations show that the improved activity is mainly derived from the charge transfer from Pd3Pb to Pt, resulting in a strong electrostatic interaction that can stabilize the transition state and lower the barrier. 

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