Eggshell-membrane-templated synthesis of C, S Doped Mesoporous NiO for methanol oxidation in alkaline solution

• Published in: Journal of applied electrochemistry 2020-08, Vol.50 (8), p.821-834
• Main Authors: Gu, Yingying, Yu, Zhenzhen, Wu, Siqin, Gao, Pengyu, Hu, Yifen, Zhang, Chuan, Xu, Zhen, Li, Jing, An, Yarui
• Format: Article
• Language: English
• Subjects: Catalysis; Catalysts; Chemistry; Chemistry and Materials Science; Electrochemistry; Electron microscopy; Fuel cells; Gravimetric analysis; High vacuum; Industrial Chemistry/Chemical Engineering; Membranes; Methanol; Microscopy; Nanoparticles; Nickel oxides; Oxidation; Photoelectrons; Physical Chemistry; Pyrolysis; Research Article; Specific surface; Surface area; Thermal decomposition
• ISSN: 0021-891X; 1572-8838
• DOI: 10.1007/s10800-020-01438-9

An interwoven hollow fiber structured mesoporous NiO catalyst doped with C, S was fabricated by the vacuum impregnation and thermal decomposition methods using eggshell membrane as template. The structure of the catalyst was characterized by X-ray diffraction, thermo-gravimetric analysis, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and specific surface area test. Under a high vacuum condition, the synthesized NiO material has a better interwoven fiber and mesoporous structure, which effectively increases the specific surface area of the material. C and S were doped into NiO via eggshell membrane pyrolysis, which then formed C–OH and SO 4 2− species on the surface of the material. The electrocatalytic performance of the catalyst for the oxidation of methanol in alkaline solution was studied by cyclic voltammetry and chronoamperometry. The C, S doped mesoporous NiO material exhibits much higher catalytic efficiency and anti-poisoning ability than that of NiO nanoparticles due to the synergistic catalysis of NiO and doping C–OH and SO 4 2− species. Graphic abstract