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Synthesis and characterization of platinum nanoparticle catalysts capped with isolated zinc species in SBA-15 channels: the wall effect
Authors:
Elizabeth
Raine
(University of Oxford)
,
Adam
Clark
(University College London (UCL))
,
Glen
Smales
(University College London (UCL))
,
Andrew
Smith
(Diamond Light Source)
,
Diego
Gianolio
(Diamond Light Source)
,
Tong
Li
(Ruhr-Universität Bochum)
,
Jianwei
Zheng
(University of Oxford)
,
Benjamin
Griffith
(University of Warwick)
,
Timothy I.
Hyde
(Johnson Matthey)
,
Mark
Feaviour
(Johnson Matthey)
,
Paul
Collier
(Johnson Matthey)
,
John V.
Hanna
(University of Warwick)
,
Gopinathan
Sankar
(University College London)
,
Shik Chi Edman
Tsang
(University of Oxford)
Co-authored by industrial partner:
Yes
Type:
Journal Paper
Journal:
Acs Applied Nano Materials
State:
Published (Approved)
Published:
November 2018
Diamond Proposal Number(s):
16316
,
16583
Abstract: The strong directing effects and difficulties in the removal of organic based surfactants makes the templated synthesis of nanoparticles in solid porous structures of defined molecular sizes such as SBA-15, without the use of surfactants, considerably attractive. However, the effects of their internal surface structures, adsorption affinities and lattice mis-match on the particle morphology grown therein have not been fully appreciated. Here, we report the internal surface of the silica preferentially hosts isolated tetrahedrally coordinated oxidic Zn species on the molecular walls of the SBA-15 channels from wet impregnated Zn2+ and Pt2+ species. This leads to less thermodynamic stable but kinetic controlled configuration of atomic zinc deposition on core platinum nanoparticles with unique confined lattice changes and surface properties to both host and guest structures at the interface upon reduction of the composite. This method for the formation templated nanoparticles may generate interests to form new tunable materials as dehydrogenation catalysts.
Journal Keywords: Nanoparticle; SBA-15; Single atom; Decoration; Support; Wall effect; Catalyst
Subject Areas:
Chemistry,
Materials
Instruments:
B18-Core EXAFS
,
I22-Small angle scattering & Diffraction
Added On:
19/11/2018 10:31
Discipline Tags:
Physical Chemistry
Catalysis
Chemistry
Materials Science
Nanoscience/Nanotechnology
Technical Tags:
Scattering
Spectroscopy
Small Angle X-ray Scattering (SAXS)
Wide Angle X-ray Scattering (WAXS)
X-ray Absorption Spectroscopy (XAS)