Silva, Maíra Vieira daFajardo, Humberto VieiraRodrigues, Thenner SilvaSilva, Felipe A. eBergamaschi, Vanderlei SérgioDias, AndersonSiqueira, Kisla Prislen Félix2021-12-142021-12-142021SILVA, M. V. da et al. Synthesis of NiMoO4 ceramics by proteic sol-gel method and investigation of their catalytic properties in hydrogen production. Materials Chemistry and Physics, v. 262, artigo 124301, 2021. Disponível em: <https://www.sciencedirect.com/science/article/abs/pii/S0254058421000845?via%3Dihub>. Acesso em: 10 jun. 2021.0254-0584http://www.repositorio.ufop.br/jspui/handle/123456789/14216A proteic sol-gel route was used in the production of NiMoO4 catalysts, which used edible gelatin as a precursor. The triple helix structure of a protein in contact with identical structures acquires an unfolded form, which favors the interaction of the reactive groups of the gelatin (NH3 + and COO− ) with the metallic ions (MoO4 2− and Ni2+). The synthesized catalysts were thoroughly characterized using techniques such as X-ray diffraction, thermog ravimetric and differential thermal analysis, Raman scattering, scanning and transmission electron microscopies, UV–Vis spectroscopy, and colorimetry. The results showed that it is possible to prepare the phase-pure α-NiMoO4 polymorph only at temperatures above 700 ◦C, while a mixture of the polymorphs α and β were obtained at lower temperatures. The synthesized materials calcined at 300, 500, and 700 ◦C have their catalytic potentials tested in the ethanol steam reforming reaction aiming the production of hydrogen and presented a good performance. The results indicated that among tested materials, the sample calcined at 700 ◦C exhibited the highest stability, activity, and best selectivity relative to the product of interest.en-USrestritoMolybdatesArtigo publicado em periodicohttps://www.sciencedirect.com/science/article/abs/pii/S0254058421000845?via%3Dihubhttps://doi.org/10.1016/j.matchemphys.2021.124301