Back to Search Start Over

High dispersion Pd nanoclusters modified sulfur-rich vacancies ZnIn2S4 for high-performance hydrogen evolution.

High dispersion Pd nanoclusters modified sulfur-rich vacancies ZnIn2S4 for high-performance hydrogen evolution.

Authors :
Wang, Di
Yang, Hongcen
Tian, Shuhao
Liu, Guo
Wang, Ying
Sun, Xiao
Wang, Zhixia
Hou, Juan
Ma, Fei
Peng, Shanglong
Source :
Applied Surface Science. Nov2023, Vol. 638, pN.PAG-N.PAG. 1p.
Publication Year :
2023

Abstract

[Display omitted] • Small size Pd nanocluters (2–5 nm) can accelerate the reaction kinetics and have superior catalytic effect. • The Pd nanoclusters and the sulfur vacancy on the substrate have synergistic effect to enhance the catalytic ability for HER. • The catalyst in the form of metal-supported achieves low overpotential (25 mV vs. RHE) at 10 mA cm−2 and high stability. Hydrogen energy is regarded as the clean energy alternative for fossil energy. Hydrogen evolution reaction (HER) is a sustainable way for the production of hydrogen energy. However, commercial platinum (Pt) catalysts for HER are expensive and scarce, which will not fully meet the demand of the future market. Therefore, scientists have been actively exploring alternatives to Pt-based catalysts. Studies have shown that palladium (Pd) and Pt have similar catalytic activity in HER. Small molecular Pd nanoclusters can be used as a perfect HER activity center. Herein, anchoring of Pd nanoclusters (Pd NCs) on sulfur-vacancy-enriched ZnIn 2 S 4 nanosheets (Pd/ZIS-T) has been successfully achieved. The zeta potential value for ZnIn 2 S 4 is −59.9 mV, indicating that the surface of ZnIn 2 S 4 is abundant negatively charged in deionized water, thus providing plentiful anchoring sites to absorb Pd2+. The results show that the synergistic effect of Pd NCs and sulfur vacancies will endow the obtained catalyst with excellent electrocatalytic activity and stability. It also managed to reducing costs by reducing noble metal content. In particular, the Pd/ZIS-T electrocatalyst with excellent performance delivered low overpotential of 25 mV at 10 mA cm−2 and small Tafel slope of 33 mV dec-1 in acidic electrolyte. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
01694332
Volume :
638
Database :
Academic Search Index
Journal :
Applied Surface Science
Publication Type :
Academic Journal
Accession number :
171391374
Full Text :
https://doi.org/10.1016/j.apsusc.2023.157926