Spherical Ni/Ni3Se2 Heterostructure for Efficient Electrochemical Oxidation Reactions. Issue 2 (13th December 2022)

• Record Type: Journal Article
• Authors: Yang, Shujiao; Chen, Dandan; Cui, Xiaohai; Zhang, Jing; Zhang, Wei; Cao, Rui
• Is Part Of: ChemNanoMat. Volume 9:Issue 2(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-12-13
• Subjects: nickel selenide -- electrocatalysis -- oxygen evolution reaction -- electrochemistry -- sulfonamide degradation; Nanochemistry -- Periodicals; Nanostructured materials -- Periodicals; Nanochemistry; Nanostructured materials; Periodicals; 541.2
• DOI: 10.1002/cnma.202200509
• Languages: English
• ISSNs: 2199-692X

Abstract

Abstract: A Ni/Ni3 Se2 metal‐semiconductor heterojunction catalyst with a sphere structure was prepared by a hydrothermal and hydrogen reduction method. The results showed that the heterostructure Ni/Ni3 Se2 exhibits better performance than Ni3 Se2 and Ni counterparts for electrochemical oxidation reactions. During electrocatalytic water oxidation, the overpotential is 340 mV to reach a catalytic current density of 10 mA cm −2 in 1.0 M KOH solution. The heterogeneous interface formed between the metal Ni and Ni3 Se2 in the Ni/Ni3 Se2 catalyst can accelerate the electron transfer in the electrochemical oxidation process. Moreover, the as‐prepared material is also applied for sulfonamide degradation, with the aid from hydroxyl radicals generated during water oxidation. This application is meaningful since the product from water oxidation is not desired in hydrogen production from water electrolysis. The material with heterojunctions delivered degradation efficiency up to 80% of sulfonamide antibiotics within 2 h. Therefore, the Ni/Ni3 Se2 material might have application prospects in electrochemical sustainability research. Abstract : A Ni/Ni3 Se2 metal‐semiconductor heterojunction catalyst with a 3D flower sphere structure exhibits better performance than the Ni3 Se2 and Ni counterparts. The heterogeneous interface formed between the metal Ni and Ni3 Se2 in the catalyst can accelerate the electron transfer. The heterojunction sample delivered a high activity of electrocatalytic water oxidation and electrochemical degradation of sulfonamide antibiotics.