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Engineering the Electronic Structure of Submonolayer Pt on Intermetallic Pd3Pb via Charge Transfer Boosts the Hydrogen Evolution Reaction.
Journal of the American Chemical Society ( IF 14.612 ) Pub Date : 2019-12-10 , DOI: 10.1021/jacs.9b09391
Yancai Yao,Xiang-Kui Gu,Dongsheng He,Zhijun Li,Wei Liu,Qian Xu,Tao Yao,Yue Lin,Hui-Juan Wang,Changming Zhao,Xiaoqian Wang,Peiqun Yin,Hai Li,Xun Hong,Shiqiang Wei,Wei-Xue Li,Yadong Li,Yuen Wu

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.
更新日期:2019-12-10

 

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