Constructing nickel sulfide heterojunctions by W-doping-induced structural transition for enhanced oxygen evolution. Issue 7 (7th February 2022)

• Record Type: Journal Article
• Authors: Xue, Ziqian; Liu, Yawen; Liu, Qinglin; Zhang, Yawei; Yu, Meng; Liang, Qianwei; Hu, Jianqiang; Li, Guangqin
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 7(2022)
• Page Start: 3341
• Page End: 3345
• Publication Date: 2022-02-07
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta00149g
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A W-doping-induced phase transition strategy was reported to construct heterojunctions. W doping can not only regulate the morphology of the catalysts but also induce to form W-Ni3 S2 /Ni7 S6 heterojunction which is a promising OER catalyst. Abstract : Developing highly effective non-noble metal-based electrocatalysts is essential for real device applications but remains a challenge. Herein, we report a W-doping-induced phase transition strategy to synthesize W-Ni3 S2 /Ni7 S6 heterojunctions. The W doping not only regulates the morphology of as-prepared catalysts to construct uniform nanorod arrays but also can induce the appearance of the Ni7 S6 crystal phase to form W-Ni3 S2 /Ni7 S6 heterojunctions which can enhance the intrinsic activity of the electrocatalyst. Consequently, W-Ni3 S2 /Ni7 S6 shows a low overpotential ( η 1 = 202 mV and η 2 = 285 mV in 1.0 M KOH for reaching a current density of 100 and 200 mA cm −2, respectively), and good stability, and is a promising noble-metal-free OER catalyst.