Interface engineering of hierarchical P-doped NiSe/2H-MoSe2 nanorod arrays for efficient hydrogen evolution. Issue 21 (8th September 2022)

• Record Type: Journal Article
• Authors: Xu, Xiaocheng; Wang, Rui; Chen, Sijie; Trukhanov, Alex; Wu, Yanxue; Shao, Lianyi; Huang, Le; Sun, Zhipeng
• Is Part Of: Inorganic chemistry frontiers. Volume 9:Issue 21(2022)
• Page Start: 5507
• Page End: 5516
• Publication Date: 2022-09-08
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d2qi01498j
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : P-NiSe/MoSe2 exhibits excellent HER properties due to the modulation of the electronic structure by P doping and the synergistic effect arising from the heterostructure. Abstract : Developing non-noble metal-based electrocatalysts with excellent activity and stability for the hydrogen evolution reaction (HER) is crucial for the efficient electrolysis of water. Herein, self-supported three-dimensional (3D) P-doped NiSe/2H-MoSe2 nanorod arrays (denoted as P-NiSe/MoSe2 ) were fabricated by a hydrothermal reaction and subsequent selenization and phosphorization processes. Benefiting from P doping, the synergistic effect of the heterostructures, and abundant active sites, the P-NiSe/MoSe2 electrocatalyst exhibits excellent alkaline HER performance, with only 43 mV required to achieve 10 mA cm −2 with a Tafel slope of 93.1 mV dec −1, even remaining stable at 10 mA cm −2 for 30 hours. In addition, theoretical calculations show that the formation of the heterostructure and P doping optimize the H atom adsorption energies and accelerate electron transport, thus improving its performance in the HER. This work offers a hopeful route for the development of low-cost and efficient electrocatalysts through the simultaneous application of heterostructure engineering and heteroatom doping as well as a 3D structure.