Comparative study on the photocatalytic decomposition of methanol on TiO 2 modified by N and promoted by metals

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The photo-induced vapor-phase reaction of methanol was investigated on Pt metals deposited on pure and N-doped TiO 2. Infrared spectroscopic measurements revealed that illumination of the CH 3OH-TiO 2 and CH 3OH-M/TiO 2 systems led to the conversion of adsorbed methoxy species into adsorbed formate. In the case of metal-promoted TiO 2 catalysts CO bonded to the metals was also detected. Pure titania exhibited very little photoactivity, its efficiency, however, increased with the narrowing of its bandgap by N-doping, a feature attributed to the prevention of electron-hole recombination. Deposition of Pt metals on pure and N-doped TiO 2 dramatically enhanced the extent of photoreaction of methanol even in visible light: hydrogen and methyl formate with selectivities of 83-90% were the major products. The most active metal was Pt followed by Pd, Ir, Rh, and Ru. The effect of metal was explained by a better separation of charge carriers induced by illumination and by enhanced electronic interaction between metal nanoparticles and TiO 2.

Original languageEnglish
Pages (from-to)199-206
Number of pages8
JournalJournal of Catalysis
Volume294
DOIs
Publication statusPublished - Oct 2012

Fingerprint

Methanol
methyl alcohol
Metals
Decomposition
decomposition
metals
formic acid
formates
Lighting
illumination
methylidyne
Metal nanoparticles
Carbon Monoxide
Charge carriers
Hydrogen
Energy gap
Titanium
Vapors
Doping (additives)
charge carriers

Keywords

  • N-doped TiO
  • Photodecomposition of methanol
  • Pt metals deposited on TiO
  • TiO photocatalyst

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

@article{b99fb5fb15fc426595ce79a192147ad7,
title = "Comparative study on the photocatalytic decomposition of methanol on TiO 2 modified by N and promoted by metals",
abstract = "The photo-induced vapor-phase reaction of methanol was investigated on Pt metals deposited on pure and N-doped TiO 2. Infrared spectroscopic measurements revealed that illumination of the CH 3OH-TiO 2 and CH 3OH-M/TiO 2 systems led to the conversion of adsorbed methoxy species into adsorbed formate. In the case of metal-promoted TiO 2 catalysts CO bonded to the metals was also detected. Pure titania exhibited very little photoactivity, its efficiency, however, increased with the narrowing of its bandgap by N-doping, a feature attributed to the prevention of electron-hole recombination. Deposition of Pt metals on pure and N-doped TiO 2 dramatically enhanced the extent of photoreaction of methanol even in visible light: hydrogen and methyl formate with selectivities of 83-90{\%} were the major products. The most active metal was Pt followed by Pd, Ir, Rh, and Ru. The effect of metal was explained by a better separation of charge carriers induced by illumination and by enhanced electronic interaction between metal nanoparticles and TiO 2.",
keywords = "N-doped TiO, Photodecomposition of methanol, Pt metals deposited on TiO, TiO photocatalyst",
author = "Gyula Halasi and G{\'a}bor Schubert and Frigyes Solymosi",
year = "2012",
month = "10",
doi = "10.1016/j.jcat.2012.07.020",
language = "English",
volume = "294",
pages = "199--206",
journal = "Journal of Catalysis",
issn = "0021-9517",
publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Comparative study on the photocatalytic decomposition of methanol on TiO 2 modified by N and promoted by metals

AU - Halasi, Gyula

AU - Schubert, Gábor

AU - Solymosi, Frigyes

PY - 2012/10

Y1 - 2012/10

N2 - The photo-induced vapor-phase reaction of methanol was investigated on Pt metals deposited on pure and N-doped TiO 2. Infrared spectroscopic measurements revealed that illumination of the CH 3OH-TiO 2 and CH 3OH-M/TiO 2 systems led to the conversion of adsorbed methoxy species into adsorbed formate. In the case of metal-promoted TiO 2 catalysts CO bonded to the metals was also detected. Pure titania exhibited very little photoactivity, its efficiency, however, increased with the narrowing of its bandgap by N-doping, a feature attributed to the prevention of electron-hole recombination. Deposition of Pt metals on pure and N-doped TiO 2 dramatically enhanced the extent of photoreaction of methanol even in visible light: hydrogen and methyl formate with selectivities of 83-90% were the major products. The most active metal was Pt followed by Pd, Ir, Rh, and Ru. The effect of metal was explained by a better separation of charge carriers induced by illumination and by enhanced electronic interaction between metal nanoparticles and TiO 2.

AB - The photo-induced vapor-phase reaction of methanol was investigated on Pt metals deposited on pure and N-doped TiO 2. Infrared spectroscopic measurements revealed that illumination of the CH 3OH-TiO 2 and CH 3OH-M/TiO 2 systems led to the conversion of adsorbed methoxy species into adsorbed formate. In the case of metal-promoted TiO 2 catalysts CO bonded to the metals was also detected. Pure titania exhibited very little photoactivity, its efficiency, however, increased with the narrowing of its bandgap by N-doping, a feature attributed to the prevention of electron-hole recombination. Deposition of Pt metals on pure and N-doped TiO 2 dramatically enhanced the extent of photoreaction of methanol even in visible light: hydrogen and methyl formate with selectivities of 83-90% were the major products. The most active metal was Pt followed by Pd, Ir, Rh, and Ru. The effect of metal was explained by a better separation of charge carriers induced by illumination and by enhanced electronic interaction between metal nanoparticles and TiO 2.

KW - N-doped TiO

KW - Photodecomposition of methanol

KW - Pt metals deposited on TiO

KW - TiO photocatalyst

UR - http://www.scopus.com/inward/record.url?scp=84865771716&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865771716&partnerID=8YFLogxK

U2 - 10.1016/j.jcat.2012.07.020

DO - 10.1016/j.jcat.2012.07.020

M3 - Article

AN - SCOPUS:84865771716

VL - 294

SP - 199

EP - 206

JO - Journal of Catalysis

JF - Journal of Catalysis

SN - 0021-9517

ER -