The Effect of Methanol on the Photodeposition of Pt Nanoparticles on Tungsten Oxide

Kasper Wenderich; Kai Han; Guido Mul

doi:10.1002/ppsc.201700250

The Effect of Methanol on the Photodeposition of Pt Nanoparticles on Tungsten Oxide

Kasper Wenderich
, Kai Han
, Guido Mul^* (Corresponding Author)

^*Corresponding author for this work

Photocatalytic Synthesis

Research output: Contribution to journal › Article › Academic › peer-review

24 Citations (Scopus)

184 Downloads (Pure)

Abstract

Formation of platinum nanoparticles on tungsten oxide by photodeposition from acidic [PtCl₆]^2- solutions in the absence or presence of methanol is studied in detail. Without methanol, [PtCl₆]^2--ions adsorbed on the WO₃ surface are converted to highly dispersed PtO/Pt(OH)₂ particles upon illumination, the maximum achievable amount being limited to 10-30% of [PtCl₆]^2- present in solution. Inclusion of methanol not only promotes adsorption of [PtCl₆]^2- ions, but upon illumination results in a deposited Pt quantity close to 100% of [PtCl₆]^2-. The obtained Pt particles are in the metallic state, large, and often clustered. The limited loading and presence of PtO/Pt(OH)₂ in the absence of methanol is explained by reduction of WO₃-surface sites, accompanied by water oxidation catalyzed by PtO/Pt(OH)₂ deposits. The extensive reduction of Pt in methanol solutions is likely induced by methoxy-radicals, oxidatively formed by reaction of methanol with photogenerated holes. This study provides guidelines for optimization of synthesis procedures of Pt/WO₃ (photo)catalysts.

Original language	English
Article number	1700250
Number of pages	8
Journal	Particle & particle systems characterization
Volume	35
Issue number	1
Early online date	10 Oct 2017
DOIs	https://doi.org/10.1002/ppsc.201700250
Publication status	Published - Jan 2018

Keywords

Nanoparticle engineering
Photocatalysis
Photodeposition
Platinum
WO
platinum
nanoparticle engineering
photocatalysis
photodeposition
2023 OA procedure

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Wenderich_et_al-2018-Particle_%26_Particle_Systems_CharacterizationFinal published version, 2.5 MBLicence: Taverne

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title = "The Effect of Methanol on the Photodeposition of Pt Nanoparticles on Tungsten Oxide",

abstract = "Formation of platinum nanoparticles on tungsten oxide by photodeposition from acidic [PtCl6]2- solutions in the absence or presence of methanol is studied in detail. Without methanol, [PtCl6]2--ions adsorbed on the WO3 surface are converted to highly dispersed PtO/Pt(OH)2 particles upon illumination, the maximum achievable amount being limited to 10-30\% of [PtCl6]2- present in solution. Inclusion of methanol not only promotes adsorption of [PtCl6]2- ions, but upon illumination results in a deposited Pt quantity close to 100\% of [PtCl6]2-. The obtained Pt particles are in the metallic state, large, and often clustered. The limited loading and presence of PtO/Pt(OH)2 in the absence of methanol is explained by reduction of WO3-surface sites, accompanied by water oxidation catalyzed by PtO/Pt(OH)2 deposits. The extensive reduction of Pt in methanol solutions is likely induced by methoxy-radicals, oxidatively formed by reaction of methanol with photogenerated holes. This study provides guidelines for optimization of synthesis procedures of Pt/WO3 (photo)catalysts.",

keywords = "Nanoparticle engineering, Photocatalysis, Photodeposition, Platinum, WO, platinum, nanoparticle engineering, photocatalysis, photodeposition, 2023 OA procedure",

author = "Kasper Wenderich and Kai Han and Guido Mul",

note = "Special Issue: Artificial Photosynthesis – Mimicking Nature for Renewable Energy Production ",

year = "2018",

month = jan,

doi = "10.1002/ppsc.201700250",

language = "English",

volume = "35",

journal = "Particle \& particle systems characterization",

issn = "0934-0866",

publisher = "Wiley-VCH Verlag",

number = "1",

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AU - Wenderich, Kasper

AU - Han, Kai

AU - Mul, Guido

N1 - Special Issue: Artificial Photosynthesis – Mimicking Nature for Renewable Energy Production

PY - 2018/1

Y1 - 2018/1

N2 - Formation of platinum nanoparticles on tungsten oxide by photodeposition from acidic [PtCl6]2- solutions in the absence or presence of methanol is studied in detail. Without methanol, [PtCl6]2--ions adsorbed on the WO3 surface are converted to highly dispersed PtO/Pt(OH)2 particles upon illumination, the maximum achievable amount being limited to 10-30% of [PtCl6]2- present in solution. Inclusion of methanol not only promotes adsorption of [PtCl6]2- ions, but upon illumination results in a deposited Pt quantity close to 100% of [PtCl6]2-. The obtained Pt particles are in the metallic state, large, and often clustered. The limited loading and presence of PtO/Pt(OH)2 in the absence of methanol is explained by reduction of WO3-surface sites, accompanied by water oxidation catalyzed by PtO/Pt(OH)2 deposits. The extensive reduction of Pt in methanol solutions is likely induced by methoxy-radicals, oxidatively formed by reaction of methanol with photogenerated holes. This study provides guidelines for optimization of synthesis procedures of Pt/WO3 (photo)catalysts.

AB - Formation of platinum nanoparticles on tungsten oxide by photodeposition from acidic [PtCl6]2- solutions in the absence or presence of methanol is studied in detail. Without methanol, [PtCl6]2--ions adsorbed on the WO3 surface are converted to highly dispersed PtO/Pt(OH)2 particles upon illumination, the maximum achievable amount being limited to 10-30% of [PtCl6]2- present in solution. Inclusion of methanol not only promotes adsorption of [PtCl6]2- ions, but upon illumination results in a deposited Pt quantity close to 100% of [PtCl6]2-. The obtained Pt particles are in the metallic state, large, and often clustered. The limited loading and presence of PtO/Pt(OH)2 in the absence of methanol is explained by reduction of WO3-surface sites, accompanied by water oxidation catalyzed by PtO/Pt(OH)2 deposits. The extensive reduction of Pt in methanol solutions is likely induced by methoxy-radicals, oxidatively formed by reaction of methanol with photogenerated holes. This study provides guidelines for optimization of synthesis procedures of Pt/WO3 (photo)catalysts.

KW - Nanoparticle engineering

KW - Photocatalysis

KW - Photodeposition

KW - Platinum

KW - WO

KW - platinum

KW - nanoparticle engineering

KW - photocatalysis

KW - photodeposition

KW - 2023 OA procedure

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DO - 10.1002/ppsc.201700250

M3 - Article

AN - SCOPUS:85031097879

SN - 0934-0866

VL - 35

JO - Particle & particle systems characterization

JF - Particle & particle systems characterization

IS - 1

M1 - 1700250

ER -

The Effect of Methanol on the Photodeposition of Pt Nanoparticles on Tungsten Oxide

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