Light-driven assembly of Pt clusters on Mo-NiOx nanosheets to achieve Pt/Mo-NiOx hybrid with dense heterointerfaces and optimized charge redistribution for alkaline hydrogen evolution

Wei Liu; Yaxuan Li; Yuanxin Dou; Nuo Xu; Jiajia Wang; Jiangtao Xu; Chuanming Li; Jingquan Liu

doi:10.1016/j.jcis.2023.11.065

Light-driven assembly of Pt clusters on Mo-NiO_x nanosheets to achieve Pt/Mo-NiO_x hybrid with dense heterointerfaces and optimized charge redistribution for alkaline hydrogen evolution

J Colloid Interface Sci. 2024 Feb:655:800-808. doi: 10.1016/j.jcis.2023.11.065. Epub 2023 Nov 11.

Authors

Wei Liu¹, Yaxuan Li², Yuanxin Dou³, Nuo Xu³, Jiajia Wang³, Jiangtao Xu³, Chuanming Li³, Jingquan Liu⁴

Affiliations

¹ School of Materials Science and Engineering, Linyi University, Linyi 276000, Shandong, China. Electronic address: liuweicl@lyu.edu.cn.
² School of Chemistry & Chemical Engineering, Linyi University, Linyi 276000, Shandong, China.
³ School of Materials Science and Engineering, Linyi University, Linyi 276000, Shandong, China.
⁴ School of Materials Science and Engineering, Linyi University, Linyi 276000, Shandong, China. Electronic address: jliu@qdu.edu.cn.

PMID: 37979286
DOI: 10.1016/j.jcis.2023.11.065

Abstract

Designing cost-effective alkaline hydrogen evolution reaction (HER) catalysts with high water dissociation ability, enhanced hydroxyl transfer rate and optimized hydrogen adsorption free energy (ΔG_H*) by a time and energy efficient strategy is pivotal, but still challenging for alkaline water electrolysis. Herein, Pt/Mo-NiO_x hybrid consisting of Pt clusters assembled on Mo-doped NiO_x nanosheet arrays is prepared on the surface of raw NiMo foam (NMF) by a light-driven strategy to address this challenge. Benefitting from the electronic interaction between Mo-NiO_x and Pt, the Pt/Mo-NiO_x composite owns optimized ΔG_H* and is beneficial for accelerating water dissociation and hydroxyl transfer. As a result, the optimized Pt/Mo-NiO_x/NMF electrode displays an exceptional alkaline HER activity with a low overpotential of 62 mV to obtain 100 mA cm^-2 and a high Pt mass activity (13.2 times as high as that of commercial 20 wt% Pt/C). Furthermore, the assembled two-electrode cell of Pt/Mo-NiO_x/NMF||NiFe-LDH/NF requires a voltage of only 1.549 V to deliver 100 mA cm^-2, along with negligible activity decay after 70 h stability test. The present study provides a promising strategy for exploiting high-performance electrocatalysts towards alkaline HER.

Keywords: Charge redistribution; Heterointerface structure; Hydrogen evolution reaction; Mo-NiO(x) nanosheet arrays; Pt clusters.