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Mechanism insight into the N-C polar bond and Pd-Co heterojunction for improved hydrogen evolution activity

Authors :
Chenliang Zhou
Shaoyuan Shi
Xingyu Zhang
Yuting Sun
Guan Peng
Wenjing Yuan
Source :
iScience, Vol 27, Iss 5, Pp 109620- (2024)
Publication Year :
2024
Publisher :
Elsevier, 2024.

Abstract

Summary: Constructing platinum-like materials with excellent catalytic activity and low cost has great significance for hydrogen evolution reaction (HER) during electrolysis of water. Herein, palladium nanoparticles (NPs) deposition on the surface of Co NPs using nitrogen-doped carbon (NC) as substrate, denoted as N-ZIFC/CoPd-30, are manufactured and served as HER electrocatalysts. Characterization results and density functional theory calculations validate that Pd-Co heterojunctions with NC acting as “electron donators” promote the Pd species transiting to the electron-rich state based on an efficient electron transfer mechanism, namely the N-C polar bonds induced strong metal-support interaction effect. The electron-rich Pd sites are beneficial to HER. Satisfactorily, N-ZIFC/CoPd-30 have only low overpotentials of 16, 162, and 13 mV@-10 mA cm−2 with the small Tafel slopes of 98 mV/decade, 126 mV/decade, and 72 mV/decade in pH of 13, 7, and 0, respectively. The success in fabricating N-ZIFC/CoPd opens a promising path to constructing other platinum-like electrocatalysts with high HER activity.

Details

Language :
English
ISSN :
25890042
Volume :
27
Issue :
5
Database :
Directory of Open Access Journals
Journal :
iScience
Publication Type :
Academic Journal
Accession number :
edsdoj.be39b50ea87440899b9cf216287e98a3
Document Type :
article
Full Text :
https://doi.org/10.1016/j.isci.2024.109620