Photooxidation of formic acid vs formate and ethanol vs ethoxy on TiO 2 and effect of adsorbed water on the rates of formate and formic acid photooxidation

Li Fen Liao, Wen Chun Wu, Chia Yuan Chen, Jong-Liang Lin

Research output: Contribution to journalArticle

112 Citations (Scopus)

Abstract

Comparison of photooxidation rates of formic acid and formate on TiO 2 as well as the effect of adsorbed water on formate and formic acid photodecomposition rates have been investigated by Fourier transformed infrared spectroscopy. Adsorbed formic acid and formate are all photooxidized to CO 2 in O 2 . Formic acid on TiO 2 shows a photoreaction rate that is roughly 53 times that of formate groups for a same surface concentration. The presence of H 2 O can increase formate and formic acid photooxidation rates by a factor close to 2. In addition, photochemistry of adsorbed ethanol and ethoxy is also compared. It is found that ethanol is important for the formation of acetaldehyde, while ethoxy groups are photooxidized to adsorbed acetate, formate, and water. Possible reasons for these differences are discussed.

Original languageEnglish
Pages (from-to)7678-7685
Number of pages8
JournalJournal of Physical Chemistry B
Volume105
Issue number32
DOIs
Publication statusPublished - 2001 Aug 16

Fingerprint

formic acid
Photooxidation
photooxidation
Formic acid
formates
Ethanol
ethyl alcohol
acids
Water
water
Acetaldehyde
Photochemical reactions
photodecomposition
acetaldehyde
Infrared spectroscopy
photochemical reactions
acetates
infrared spectroscopy

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

@article{edb4a48e042a40e08c5f1746da85a7ef,
title = "Photooxidation of formic acid vs formate and ethanol vs ethoxy on TiO 2 and effect of adsorbed water on the rates of formate and formic acid photooxidation",
abstract = "Comparison of photooxidation rates of formic acid and formate on TiO 2 as well as the effect of adsorbed water on formate and formic acid photodecomposition rates have been investigated by Fourier transformed infrared spectroscopy. Adsorbed formic acid and formate are all photooxidized to CO 2 in O 2 . Formic acid on TiO 2 shows a photoreaction rate that is roughly 53 times that of formate groups for a same surface concentration. The presence of H 2 O can increase formate and formic acid photooxidation rates by a factor close to 2. In addition, photochemistry of adsorbed ethanol and ethoxy is also compared. It is found that ethanol is important for the formation of acetaldehyde, while ethoxy groups are photooxidized to adsorbed acetate, formate, and water. Possible reasons for these differences are discussed.",
author = "Liao, {Li Fen} and Wu, {Wen Chun} and Chen, {Chia Yuan} and Jong-Liang Lin",
year = "2001",
month = "8",
day = "16",
doi = "10.1021/jp003541j",
language = "English",
volume = "105",
pages = "7678--7685",
journal = "Journal of Physical Chemistry B Materials",
issn = "1520-6106",
publisher = "American Chemical Society",
number = "32",

}

Photooxidation of formic acid vs formate and ethanol vs ethoxy on TiO 2 and effect of adsorbed water on the rates of formate and formic acid photooxidation . / Liao, Li Fen; Wu, Wen Chun; Chen, Chia Yuan; Lin, Jong-Liang.

In: Journal of Physical Chemistry B, Vol. 105, No. 32, 16.08.2001, p. 7678-7685.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Photooxidation of formic acid vs formate and ethanol vs ethoxy on TiO 2 and effect of adsorbed water on the rates of formate and formic acid photooxidation

AU - Liao, Li Fen

AU - Wu, Wen Chun

AU - Chen, Chia Yuan

AU - Lin, Jong-Liang

PY - 2001/8/16

Y1 - 2001/8/16

N2 - Comparison of photooxidation rates of formic acid and formate on TiO 2 as well as the effect of adsorbed water on formate and formic acid photodecomposition rates have been investigated by Fourier transformed infrared spectroscopy. Adsorbed formic acid and formate are all photooxidized to CO 2 in O 2 . Formic acid on TiO 2 shows a photoreaction rate that is roughly 53 times that of formate groups for a same surface concentration. The presence of H 2 O can increase formate and formic acid photooxidation rates by a factor close to 2. In addition, photochemistry of adsorbed ethanol and ethoxy is also compared. It is found that ethanol is important for the formation of acetaldehyde, while ethoxy groups are photooxidized to adsorbed acetate, formate, and water. Possible reasons for these differences are discussed.

AB - Comparison of photooxidation rates of formic acid and formate on TiO 2 as well as the effect of adsorbed water on formate and formic acid photodecomposition rates have been investigated by Fourier transformed infrared spectroscopy. Adsorbed formic acid and formate are all photooxidized to CO 2 in O 2 . Formic acid on TiO 2 shows a photoreaction rate that is roughly 53 times that of formate groups for a same surface concentration. The presence of H 2 O can increase formate and formic acid photooxidation rates by a factor close to 2. In addition, photochemistry of adsorbed ethanol and ethoxy is also compared. It is found that ethanol is important for the formation of acetaldehyde, while ethoxy groups are photooxidized to adsorbed acetate, formate, and water. Possible reasons for these differences are discussed.

UR - http://www.scopus.com/inward/record.url?scp=0035899166&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035899166&partnerID=8YFLogxK

U2 - 10.1021/jp003541j

DO - 10.1021/jp003541j

M3 - Article

AN - SCOPUS:0035899166

VL - 105

SP - 7678

EP - 7685

JO - Journal of Physical Chemistry B Materials

JF - Journal of Physical Chemistry B Materials

SN - 1520-6106

IS - 32

ER -