journal article·2003-05-02

Size‐Controlled Synthesis and Catalytic Performance of Pt Nanoparticles in Micro‐ and Mesoporous Silica Prepared Using Supercritical Solvents

H. Wakayama, N. Setoyama, Y. Fukushima

Advanced Materials· Volume 15· Issue 9
Publisher page

Abstract

A novel impregnation process using a supercritical fluid (SCF) solvent to generate size‐controlled Pt nanoparticles in micro‐ and mesoporous silica hosts with a uniform pore size (see Figure) is presented. The size of the Pt nanoparticles decreases with the pore size of silica hosts, and the SCFs are shown to be excellent solvents for the introduction of nanoparticles into fine spaces on a nanometer scale.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Mesoporous Materials and Catalysis · Catalytic Processes in Materials Science · Catalysis and Oxidation Reactions

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

References (23)

Show source-provided references
1. 10.1039/fd993950021910.1039/fd9939500219 ↗
2. 10.1007/BF0065782610.1007/BF00657826 ↗
3. 10.1126/science.272.5270.192410.1126/science.272.5270.1924 ↗
4. 10.1021/j100129a00810.1021/j100129a008 ↗
5. 10.1021/jp983478m10.1021/jp983478m ↗
6. 10.1016/S0920-5861(00)00601-510.1016/S0920-5861(00)00601-5 ↗
7. 10.1039/C3995000228310.1039/C39950002283 ↗
8. 10.1021/cm001055310.1021/cm0010553 ↗
9. Cho S.J. · J. Phys. Chem. B · 2001 · 105 · 129310.1021/jp0022959 ↗
10. 10.1039/a901924c10.1039/a901924c ↗
11. 10.1039/a904681j10.1039/a904681j ↗
12. 10.1021/cr970036i10.1021/cr970036i ↗
13. 10.1039/a808255c10.1039/a808255c ↗
14. 10.1021/jp984649q10.1021/jp984649q ↗
15. 10.1021/cm990487e10.1021/cm990487e ↗
16. 10.1021/ie000148r10.1021/ie000148r ↗
17. 10.1021/cm001408y10.1021/cm001408y ↗
18. 10.1111/j.1151-2916.2002.tb00059.x10.1111/j.1151-2916.2002.tb00059.x ↗
19. 10.1126/science.106414810.1126/science.1064148 ↗
20. 10.1023/A:101606002291410.1023/A:1016060022914 ↗
21. Assuming a hexagonal arrangement of the porous structures of the micro‐ and meso‐porous silica matrices FSM‐16 as indicated in the XRD and TEM results Equation 1 can be derived from a geometrical consideration ${ {W_0} = {{(a-t)}^2 \over {4\rho}} \cdot {{1} \over {[a(t/2)-(t/2)^2]}} }$(1)whereW0is the pore volume per unit weight ais the lattice constant from the XRD result tis the thickness of the pore wall and ρ is the density of the pore wall which is assumed to be 2.2 g mL–1. The thickness of the pore wall t can be obtained as a constant value of 0.9 nm from the plot ofW0as a function ofa. The pore diameter d can be estimated asa–t.
22. Hruk M. · J. Phys. Chem. B · 1997 · 101 · 58310.1021/jp962000k ↗
23. 10.1246/bcsj.69.144910.1246/bcsj.69.1449 ↗