Electrospun P–Mo–W–Ni multicomponent composite oxides for hydrogen evolution reaction. (16th October 2017)

• Record Type: Journal Article
• Authors: Li, Chuang; Zhu, Mengxuan; Chen, Yang; Lü, Wei; Shan, Yuping; Yang, Guocheng; He, Jin
• Is Part Of: Materials research express. Volume 4:Number 10(2017)
• Publication Date: 2017-10-16
• Subjects: electrospinning -- heteropoly acid -- P–Mo–W–Ni multicomponent composites -- hydrogen evolution reaction; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aa8d5d
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Novel crystalline Ni10 W12 Mo12 P2 O87 multicomponent composite oxides were synthesized through electrospinning heteropoly acid H3 PMo12 O40 (PMo12 ), H3 PW12 O40 (PW12 ) and NiAc2 -contained polyvinyl alcohol aqueous solution with a PMo12 :PW12 :NiAc2 ratio of 1:1:10. Then, calcination is performed under mild conditions. The characterization results of the structure, composition and morphology observed from x-ray powder diffraction, thermogravimetric analysis, field-emission high-resolution transmission electron microscopy, scanning electron microscopy, Raman spectroscopy and Fourier transform infrared illustrated that multicomponent composite oxides consisted of MoO3, WO3, NiWO4, NiMoO4 and P2 O5 . The electrochemical method could explain that the crystalline Ni10 W12 Mo12 P2 O87 presented better hydrogen evolution properties than those fabricated from PMo12 to NiAc2 or PW12 to NiAc2 equaling to 1:5, individually, and the corresponding Tafel slope was 40 mV/decade. In addition, the presence of NiMoO4 and NiWO4 compounds was crucial to improve the electrocatalytic hydrogen evolution properties of the catalyst.