Cr‐Doped Ni 3 S 2 Nanosheet Arrays as Efficient and Stable Electrocatalysts for Alkaline Hydrogen Evolution Reaction
Year: 2026
Type: article
Abstract: ABSTRACT Developing efficient and stable non‐precious metal electrocatalysts for hydrogen evolution reaction (HER) is of great significance for advancing water electrolysis hydrogen production technology. This paper presents a Cr‐doped Ni 3 S 2 nanosheet array catalyst prepared on nickel foam via a one‐step hydrothermal method. Experimental results show that the introduction of Cr effectively improves conductivity and accelerates interfacial electron transfer, resulting in the catalyst exhibiting excellent hydrogen evolution performance in a 1.0 M KOH electrolyte, achieving a current density of 10 mA cm −2 with only a 122 mV overpotential, and maintaining long‐term operational stability for over 20 h. Furthermore, XPS and Raman results show that Cr doping not only optimizes the electronic structure of Ni 3 S 2 but also induces the formation of a surface oxygen sulfide layer thereby promoting the dissociation of water. This study provides a new approach for designing superior hydrogen evolution catalysts by synergistically controlling electronic structure and surface reconstruction through doping engineering.
Source: ChemCatChem
Authors: Tingting Li, Xiyu Tan, Longquan Li, Binhua Zhou, JingJing Huang, Pengxu Chen, Pengfei Tan, Jun Pan
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W7160144701