期刊
NANOSCALE
卷 13, 期 15, 页码 7134-7139出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nr00795e
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资金
- National Natural Science Foundation of China [22075211, 51971157, 21601136]
- Tianjin Science Fund for Distinguished Young Scholars [19JCJQJC61800]
- Science and Technology Development Fund of Tianjin Education Commission for Higher Education [2018KJ126]
Pt-SA/MXene catalyst shows efficient hydrogen evolution reaction (HER) activity in alkaline electrolytes with low overpotential and long-term stability. It has competitive mass activity and improved catalytic performance due to its unique structure and polarized electric field effect.
Herein, we reported a kind of single Pt site (Pt-SA) stabilized on an MXene support (Pt-SA/MXene) via the formation of Pt-O and Pt-Ti bonds to effectively catalyze the hydrogen evolution reaction (HER). Due to the local electric field polarization derived from its unique asymmetric coordination, Pt-SA/MXene displays remarkably higher catalytic HER activity in an alkaline electrolyte. In detail, the Pt-SA/MXene electrocatalyst only needs a low overpotential of 33 mV to reach a current density of 10 mA cm(-2) and maintains the performance over 27 h. Besides, Pt-SA/MXene also has a competitive mass activity, 23.5 A mg(Pt)(-1), at an overpotential of 100 mV, which is 29.4 times greater than that of the commercial Pt/C counterpart. Density functional theory (DFT) calculations revealed that the polarized electric field could efficiently tailor the electronic structure of Pt-SA/MXene and reduce the energy barrier of adsorption/desorption of the H* intermediate step, further improving its HER catalytic activity.
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