Heterogeneous Bimetallic Mo‐NiPx/NiSy as a Highly Efficient Electrocatalyst for Robust Overall Water Splitting. (13th June 2021)

• Record Type: Journal Article
• Authors: Wang, Jin; Zhang, Mengke; Yang, Guanglong; Song, Wenwu; Zhong, Weiting; Wang, Xunyue; Wang, Minmin; Sun, Tongming; Tang, Yanfeng
• Is Part Of: Advanced functional materials. Volume 31:Number 33(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-06-13
• Subjects: doping engineering -- electrocatalyst -- heterogeneous interfaces -- Mo‐NiPx/NiSy heterojunction -- water splitting; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202101532
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Highly efficient electrocatalysts composed of earth‐abundant elements are desired for water‐splitting to produce clean and renewable chemical fuel. Herein, a heteroatomic‐doped multi‐phase Mo‐doped nickel phosphide/nickel sulfide (Mo‐NiP x /NiS y ) nanowire electrocatalyst is designed by a successive phosphorization and sulfuration method for boosting overall water splitting (both oxygen and hydrogen evolution reactions (HER)) in alkaline solution. As expected, the Mo‐NiP x /NiS y electrode possesses low overpotentials both at low and high current densities in HER, while the Mo‐NiP x /NiS y heterostructure exhibits high active performance with ultra‐low overpotentials of 137, 182, and 250 mV at the current density of 10, 100, and 400 mA cm −2 in 1 m KOH solution, respectively, in oxygen evolution reaction. In particular, the as‐prepared Mo‐NiP x /NiS y electrodes exhibit remarkable full water splitting performance at both low and high current densities of 10, 100, and 400 mA cm −2 with 1.42, 1.70, and 2.36 V, respectively, which is comparable to commercial electrolysis. Abstract : A heteroatomic‐doped multi‐phase Mo‐doped nickel phosphide/nickel sulfide (Mo‐NiP x /NiS y ) electrocatalyst with abundant heterogeneous interfaces is designed and applied for robust full water splitting, which delivers 10 mA cm −2 at cell voltage of 1.42 V and 400 mA cm −2 at 2.36 V. Furthermore, the electrode exhibits high stability in overall water splitting without decay even after 50 h testing, which provides great potential for commercial applications.