2026-10-09T12:26:16Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34040619 2026-10-01T07:11:15Z category_1 category_146 category_873 category_39 category_69 portal_63 item_type_6 month_year_10_2026

Controlled Pt Doping of Silica-Supported Ni Nanoparticles through Surface Organometallic Chemistry on Metals: Applications as Catalysts for Selective Hydrogenation Reactions Alejandra Zuluaga (21836534) Smitkriti Smitkriti (25153779) Laurent Vanoye (1434100) Régis Philippe (1434097) Laurent Veyre (1301364) Romain Réocreux (2795908) Clément Camp (1346961) Chloé Thieuleux (1301370) Biophysics Space Science Chemical Sciences not elsewhere classified Ecology Inorganic Chemistry including infrared spectroscopy exhibit remarkable selectivity enhancing catalytic performance density functional theory 500 ° c surface organometallic chemistry targeted bimetallic nanoparticles controlled pt doping efficient bimetallic catalysts grafted ni nps surface pt ligands selective pt doping pt distribution within 2 </ sub pt centers onto supported ni nanoparticles ni nps ni nanoparticles supported ni pt nanoparticles via </ uniform distribution selective grafting nickel nanoparticles also supported pt onto pt loading pt atoms versatile approach successful incorporation resulting solids resulting materials precise control original approach key parameters experimental observations Silica-supported Ni/Pt nanoparticles were synthesized through the selective Pt doping of silica-supported Ni nanoparticles using an original approach that can be considered as a Surface OrganoMetallic Chemistry on Metals (SOMC@M). The targeted bimetallic nanoparticles were obtained <i>via</i> the selective grafting of Pt(COD)Me₂ onto the surface of the nickel nanoparticles. The resulting solids were fully characterized using several techniques, including infrared spectroscopy, HAADF-STEM, and HRTEM with EDX, confirming the successful incorporation and uniform distribution of Pt centers onto the Ni nanoparticles without side deposition of Pt onto the silica support. These experimental observations were also supported by Density Functional Theory (DFT) calculations. Further H₂ treatments at 500 °C were applied to the Pt-grafted Ni NPs to enable the removal of surface Pt ligands and the diffusion of Pt atoms into the Ni nanoparticles. This SOMC@M methodology was able to secure the precise control over Pt loading and Pt distribution within the Ni NPs, key parameters for enhancing catalytic performance. The resulting materials were found to exhibit remarkable selectivity in both the hydrogenation of 4-nitrostyrene and the semihydrogenation of hex-3-yn-1-ol, demonstrating the potential of SOMC@M as a versatile approach for the design of tunable and efficient bimetallic catalysts. 2026-10-01T00:00:00Z Text Journal contribution 10.1021/acsmaterialsau.6c00132.s001 https://figshare.com/articles/journal_contribution/Controlled_Pt_Doping_of_Silica-Supported_Ni_Nanoparticles_through_Surface_Organometallic_Chemistry_on_Metals_Applications_as_Catalysts_for_Selective_Hydrogenation_Reactions/34040619 CC BY-NC 4.0