Showing papers by "José Maria C. Bueno published in 2021"
TL;DR: In this paper, a spectroscopic and microscopic investigation was made of the dynamics of bimetallic nanoparticles (NPs) in CoNi/MgAl2O4 catalysts used for the steam reforming of ethanol (SRE) reaction.
Abstract: A spectroscopic and microscopic investigation was made of the dynamics of bimetallic nanoparticles (NPs) in Co–Ni/MgAl2O4 catalysts used for the steam reforming of ethanol (SRE) reaction, consideri...
23 citations
TL;DR: In this article, Niobium phosphates with a high L/B molar ratio (L/B ratio between Lewis and Bronsted acid sites) were used as promising catalysts for HMF and furfural production.
Abstract: The direct conversion of glucose and xylose into HMF and furfural is more efficient using a combination of Lewis and Bronsted acids. Herein, niobium phosphates were prepared with different compositions, which affect its surface acidity and, consequently, the catalytic activity. The catalysts with a high P/Nb molar ratio presented a low molar ratio between Lewis and Bronsted acid sites (L/B ratio), while those with low P/Nb molar ratio displayed a high L/B ratio. NbP-2, the sample with the highest L/B ratio, showed the highest reaction rate for both HMF and furfural formation. It was found, indeed, that the reaction rate for monosaccharides conversion and furans formation correlate linearly with the L/B ratio. The results presented not only introduce niobium phosphates with a high L/B molar ratio as promising catalysts for HMF and furfural production but also provide fundamental knowledge that will guide the design of other bifunctional heterogeneous catalysts.
20 citations
TL;DR: In this paper, the authors investigated the influences of Cu content, Si/Al ratio, and sample preparation method on the active Cu species in mordenite (MOR).
5 citations
TL;DR: In this article, one-pot methodologies for the synthesis of copper supported in mesoporous silica was developed, where the Cu loadings affected both the textural properties of the silica support and the Cu nanoparticles.
4 citations
TL;DR: In this article, the Pt/Al 2O3La2O3 catalysts were characterized by in situ X-ray absorption spectroscopy (XAS) and the partial oxidation of methane reaction was used to evaluate catalyst stability.
4 citations