Highly-dispersed Ni, N-doped Mo2C nanoparticles prepared from organic-derived polyoxomolybdates for efficient electrocatalytic hydrogen evolution. (5th August 2022)

• Record Type: Journal Article
• Authors: Li, Jincheng; Wang, Xingyue; Wang, Yu; Zhao, Yanchao; Ma, Chunhui; Zhan, Taozhu; Chen, Lihong; Zhao, Chenqi; Lan, Jin; Xiao, Zicheng; Wu, Pingfan
• Is Part Of: International journal of hydrogen energy. Volume 47:Number 67(2022)
• Page Start: 28915
• Page End: 28923
• Publication Date: 2022-08-05
• Subjects: Hydrogen evolution reaction -- Atoms doping -- Polyoxometalates; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2022.06.241
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Molybdenum carbide is regarded as a noble metal-free and highly efficient electrocatalyst for hydrogen evolution reaction (HER) owing to its appropriate intermediate binding energy and Pt-like d orbital structure. It's an advanced method doping Ni, Zn, N, P and other atoms to further enhance the electrocatalytic performance of Mo2 C, but the content of general doping elements is uncontrollable and cannot be accurately measured. In this work, we employ a unilateral Tris-functionalized Anderson polyoxomolybdate [H3 NiMo6 O21 {(CH2 O)3 CNH3 }] 3- as a precursor for the first time to prepare Mo2 C nanoparticles. The POMs were mixed with chitosan (CS) in aqueous solution and carbonized at high temperature to abtain highly dispersed N, Ni-doped Mo2 C nanoparticles. The final electrocatalyst shows enhanced HER performance and good electrochemical stability. This article offers a feasible preparation of doped catalytic materials and extends the application of polyoxometalates. Graphical abstract: Image 1 Highlights: Highly dispersed nanocomposite is prepared using a unilateral Tris-functionalized Anderson polyoxomolybdate precursor. The Mo/Ni ratio is precise in the Ni/N Mo2 C@C nanocomposite. Ni/N Mo2 C@C shows a better activity for electrocatalytic HER than commercial Pt/C and remains stable after 5000 cycles.