Abstract
In this work, Pt nanoparticles were incorporated into SBA-15 to prepare the materials for hydrogen spillover adsorption. We provide a direct modification (DM) strategy to improve the content of Pt nanoparticles inside the channels of SBA-15. In this strategy, the Pt precursor was directly incorporated into as synthesized SBA-15 by a solid-state grinding method. The subsequent calcination in air, then H2/Ar gases was conducted to obtain the resultant materials of PtAS. For the samples of PtAS, Pt nanoparticles up to 5.0 wt% have a high dispersion inside the channels of SBA-15. The size of nanoparticles is in control of 3.7 nm. Although much work so far has focused on modification of SBA-15 with Pt nanoparticles. Here, it is the first time the loading amount of Pt nanoparticles raises up to 5.0 wt%, and the location of the Pt nanoparticles is interior channels of SBA-15. We reveal that the high dispersion behaviors of Pt nanoparticles are ascribed to the nanoconfinement effects provided by as synthesized SBA-15. However, the samples derived from template free SBA-15 (PtCS) show sparsely dispersion of Pt nanoparticles with the size of 7.7 nm. We demonstrate that the PtAS samples show better hydrogen adsorption performance than PtCS.
Highlights
With the vigorous development of new energy technology, significant attention has been paid to hydrogen gas because it is an environmental friendly source and has the potential application in power fuel cells[1,2,3,4]
Contributing to this direct modification (DM) strategy, active sites have a high dispersion on the accepting surface with a high loading content, which guarantees the internal surface of the support could efficiently play the role of accepting hydrogen source
We demonstrate that the obtained materials (PtAS) prepared with the DM strategy exhibit excellent performance on hydrogen storage at room temperature, which is better than the materials derived from template free SBA-15 (PtCS)
Summary
With the vigorous development of new energy technology, significant attention has been paid to hydrogen gas because it is an environmental friendly source and has the potential application in power fuel cells[1,2,3,4]. Mesoporous silica SBA-15 is widely studied in the fields of catalysis[24,25,26], gas separation[27,28,29,30], drug delivery[31, 32], and energy storage[33, 34] It is of great interest for use as a support to disperse heterogeneous noble metal nanoparticles, due to its ordered pore structure, high surface area and large pore volume[35,36,37,38,39]. We provide a direct modification (DM) strategy to prepare noble metal nanoparticles inside the channels of mesoporous silica By use of such a DM strategy, 5.0 wt% of Pt nanoparticles are highly dispersed over the whole inner surface of SBA-15 with the particle size of 3.7 nm. It overcomes the value of 0.21 mmol∙g−1 for the sample of 5.0PtCS
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
