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Modulating metal-support interaction between Pt3Ni and unsaturated WOx to selectively regulate the ORR performance
Jinli Chen, Shouquan Feng, Tianqi Yu, Yongjin Zou, Huan Wen*, Shibin Yin* Submit a Manuscript
Ni nanoparticles anchoring on vacuum treated Mo2TiC2Tx MXene for enhanced hydrogen evolution activity

Xiangyuan Zhao, Jinjin Wang, Jinzhao Kang, Xiaomei Wang, Hong Yu, Cheng-Feng Du*

Chin. J. Struct. Chem., 2023, 42: 100159. DOI: 10.1016/j.cjsc.2023.100159

October 15, 2023

Nickel nanoparticles; MXene; Hybrid; Electrocatalysts; Hydrogen evolution reaction

ABSTRACT

MXenes with metal nanoparticles (NPs) immobilized on their surface are greatly desired for high-performance electrocatalysts, while the homogeneous nucleation and growth of NPs are still challenging. Herein, a new method has been proposed for uniformly anchoring Ni NPs on the altered surficial MXene. The pre-vacuum treatment on Mo2TiC2Tx (oMX) not only removes the surficial terminal groups but also induces surface oxidation defects. Meanwhile, the nucleation and growth behaviors of Ni NPs on the oMX are altered in the hydrothermal reaction, which results in a grain-size reduction of more than 50% as well as homogeneous coverage. Eventually, the oxidized surface contributes a strong coupling between oMX and Ni NPs via Ni−O binging, which endows the Ni@oMX hybrid with the lowest overpotential and high durability over 75 h in 1 M KOH solution for electrocatalytic hydrogen evolution reaction (HER).

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