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@article{2249866, author = {Van der Verren, Margot and Vykoukal, Vít and Stýskalík, Aleš and Malik, Ali Shan and Aprile, Carmela and Debecker, Damien P.}, article_location = {Washington, D.C.}, article_number = {12}, doi = {http://dx.doi.org/10.1021/acsanm.2c04786}, keywords = {gold nanoparticles; thiol; mesoporous silica; glycerol upgrading; spray drying; MPTMS}, language = {eng}, issn = {2574-0970}, journal = {ACS Applied Nano Materials}, title = {Airborne Preparation of Small Gold Nanoparticles Dispersed on Mesoporous Silica for the Catalytic Oxidation of Glycerol to Dihydroxyacetone}, url = {https://doi.org/10.1021/acsanm.2c04786}, volume = {5}, year = {2022} }
TY - JOUR ID - 2249866 AU - Van der Verren, Margot - Vykoukal, Vít - Stýskalík, Aleš - Malik, Ali Shan - Aprile, Carmela - Debecker, Damien P. PY - 2022 TI - Airborne Preparation of Small Gold Nanoparticles Dispersed on Mesoporous Silica for the Catalytic Oxidation of Glycerol to Dihydroxyacetone JF - ACS Applied Nano Materials VL - 5 IS - 12 SP - 18977-18985 EP - 18977-18985 PB - American Chemical Society SN - 25740970 KW - gold nanoparticles KW - thiol KW - mesoporous silica KW - glycerol upgrading KW - spray drying KW - MPTMS UR - https://doi.org/10.1021/acsanm.2c04786 N2 - Supported gold nanoparticles play a fundamental role in modern material science and particularly in heterogeneous catalysis. Supported gold nanoparticles are known to be excellent catalysts, not only for the total oxidation of various pollutants (CO, VOCs) but also for the selective oxidation of bio-based platform molecules (such as glycerol) to added-value chemicals (dihydroxyacetone, glyceric acid, and glycolic acid). Controlling their fine dispersion however remains a challenge, especially when using silica supports. We report a simple one-pot aerosol route to mesoporous Au–SiO2 catalysts featuring small gold nanoparticles (∼3 nm). To achieve this, we rely on the strong interactions between the gold and thiol functions of a mercapto-silane: (3-mercaptopropyl)-trimethoxysilane (MPTMS). The addition of this gold stabilizer during synthesis enhances the stability of the gold precursor and is the key to controlling the formation of small gold nanoparticles. The dispersion of gold in the material reaches 21% (compared with 3% without the stabilizer). The selective oxidation of glycerol to dihydroxyacetone was employed as a test reaction, of importance in the context of sustainable chemistry. The highly dispersed catalyst obtained via gold stabilization outcompetes benchmark catalysts, reaching a glycerol conversion of 59% after 8 h (vs 5% without stabilization). ER -
VAN DER VERREN, Margot, Vít VYKOUKAL, Aleš STÝSKALÍK, Ali Shan MALIK, Carmela APRILE and Damien P. DEBECKER. Airborne Preparation of Small Gold Nanoparticles Dispersed on Mesoporous Silica for the Catalytic Oxidation of Glycerol to Dihydroxyacetone. \textit{ACS Applied Nano Materials}. Washington, D.C.: American Chemical Society, 2022, vol.~5, No~12, p.~18977-18985. ISSN~2574-0970. Available from: https://dx.doi.org/10.1021/acsanm.2c04786.
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