20.500.12556/RUL-156322 Understanding platinum-based H2 adsorption/desorption kinetics during catalytic hydrogenation or hydrogen storage-related reactions Hydrogen is among the most promising energy carriers and plays an important role on the way to sustainable technologies. Platinum holds great promise for unlocking the potential of renewable hydrogen, as it is an essential component of proton exchange membrane technologies and in various hydrogenation reactions. For the variety of applications of energy harvesting, conversion, and storage, the optimization and reduction of Pt loading is crucial. In view of this, a platinum catalyst using a stable SiO$_2$ support is synthesized to investigate the adsorption/desorption behavior of hydrogen on platinum nanoparticles of different sizes, obtained by treating the sample at different calcination temperatures. Pulsed chemisorption and subsequent temperature-programmed desorption are described mathematically to obtain kinetic parameters. It is shown that higher adsorption capacities could be obtained using smaller particles. However, for particles smaller than 2.4 nm, higher Pt$^{2+}$ content decreases H$_2$ adsorption. Adsorption inhibition due to the presence of monatomic Pt cannot be excluded. The size of the Pt nanoparticles does not significantly affect the desorption/adsorption energy, but there is evidence that the hydrogen adsorbed per Pt atom at the surface varies with size: about 1 for single crystal planes and 2 for nanoparticles <3 nm. platinum catalyst hydrogen nanoparticle size temperature programmed desorption kinetic modelling kataliza katalizatorji vodik nanodelci platina true false true Angleški jezik Slovenski jezik Članek v reviji 2024-05-20 10:17:48 2024-05-20 10:17:50 2024-05-21 03:46:45 0000-00-00 00:00:00 2024 0 0 9 str. art. 120467 Vol. 226 May 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.3/.4 1879-0682 10.1016/j.renene.2024.120467 194097155 1-s2.0-S0960148124005329-main.pdf 1-s2.0-S0960148124005329-main.pdf 1 FB0056A2BC6F1153F4717AD98294263F 5f9dfb71f1082a970078cecbd55dd8848f7c194fcef8c3dadeea3cc3bcff54b4 dcac8e65-1681-11ef-b600-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183719 https://www.sciencedirect.com/science/article/pii/S0960148124005329 1 71fa798b-1681-11ef-b600-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=183718 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0