3D nanostructured NiMo catalyst electrodeposited on 316L stainless steel for hydrogen generation in industrial applications

Autor:	Esteban A. Franceschini, Gabriela I. Lacconi, Graciela C. Abuin, Liliana A. Diaz, Melisa J. Gómez
Rok vydání:	2019
Předmět:	Materials science Scanning electron microscope General Chemical Engineering technology industry and agriculture chemistry.chemical_element 02 engineering and technology Chronoamperometry engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Electrocatalyst 01 natural sciences 0104 chemical sciences Catalysis chemistry Chemical engineering X-ray photoelectron spectroscopy Coating Molybdenum Plating Materials Chemistry Electrochemistry engineering 0210 nano-technology
Zdroj:	Journal of Applied Electrochemistry. 49:1227-1238
ISSN:	1572-8838 0021-891X
DOI:	10.1007/s10800-019-01361-8
Popis:	Nowadays, massive NiMo alloys are considered highly active catalysts for the hydrogen evolution reaction (HER) in industrial alkaline electrolysers. Thus, it is desirable to study other alternative materials, preserving the specific properties of these alloys. In this study, a NiMo coating on 316L stainless steel with high resistance to the corrosive medium is obtained by electrodeposition process. Properties and structural characteristics of the new synthesized material have been correlated with its efficiency as electrocatalyst. In this study, using a simple plating method, it was possible to obtain a material with a catalytic activity for the HER in alkaline media, which is 37.6 times higher than that of conventional raw Ni catalysts, at a considerably lower cost. The 3D nanostructured NiMo catalyst synthesized presented a highly roughened surface with porous microstructure, which is an essential requirement for obtaining high catalytic activity with this type of systems. The porous microstructure in the coating has been confirmed by X ray diffraction and scanning electron microscopy. Raman spectra of the surface evidenced the formation of superficial species before and after the ageing treatment by prolonged chronoamperometry in alkaline electrolyte. This feature was also confirmed by the analysis of X ray photoelectron spectroscopy measurements.
Databáze:	OpenAIRE
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