Two routes to formaldehyde from formic acid on TiO2(001) surfaces

Hicham Idriss, V S Lusvardi, M A Barteau

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

Two routes were observed for formaldehyde formation from formic acid on TiO2(001) single crystal surfaces. The first, on reduced surfaces, involves the reduction of formic acid to formaldehyde accompanied by the oxidation of surface Ti cations. Surface oxidation was evident from the increase in the portion of the Ti (2p(3/2)) signal corresponding to Ti4+ and the decrease in that corresponding to Ti-x+(0<x<4) in XPS. XPS after formic acid adsorption on both reduced and oxidized TiO2 surfaces showed the presence of formate species having a C(1s) binding energy of 289.3 eV; these species are formed by dissociative adsorption of formic acid at room temperature. A second route for formaldehyde formation, operative on fully oxidized surfaces, involves bimolecular coupling of two formates. This reaction occurs only on the reconstructed, fully oxidized surface; the {114}-faceted TiO2(001) structure (obtained by annealing at 900 K or above), as previously reported by Kim and Barteau [Langmuir 6 (1990) 1485].

Original languageEnglish
Pages (from-to)39-48
Number of pages10
JournalSurface Science Reports
Volume348
Issue number1-2
DOIs
Publication statusPublished - 1 Mar 1996

Keywords

  • formaldehyde
  • formic acid
  • photoelectron spectroscopy
  • temperature programmed reaction
  • titanium oxides
  • ENERGY-ELECTRON-DIFFRACTION
  • SINGLE-CRYSTAL SURFACES
  • CARBON BOND FORMATION
  • X-RAY PHOTOELECTRON
  • TIO2 RUTILE 001
  • METAL-OXIDES
  • 110 SURFACES
  • SPECTROSCOPY
  • ADSORPTION
  • PHOTOEMISSION

Cite this

Two routes to formaldehyde from formic acid on TiO2(001) surfaces. / Idriss, Hicham; Lusvardi, V S ; Barteau, M A .

In: Surface Science Reports, Vol. 348, No. 1-2, 01.03.1996, p. 39-48.

Research output: Contribution to journalArticle

Idriss, Hicham ; Lusvardi, V S ; Barteau, M A . / Two routes to formaldehyde from formic acid on TiO2(001) surfaces. In: Surface Science Reports. 1996 ; Vol. 348, No. 1-2. pp. 39-48.
@article{ed21ff8116954eff89e81b6863506cad,
title = "Two routes to formaldehyde from formic acid on TiO2(001) surfaces",
abstract = "Two routes were observed for formaldehyde formation from formic acid on TiO2(001) single crystal surfaces. The first, on reduced surfaces, involves the reduction of formic acid to formaldehyde accompanied by the oxidation of surface Ti cations. Surface oxidation was evident from the increase in the portion of the Ti (2p(3/2)) signal corresponding to Ti4+ and the decrease in that corresponding to Ti-x+(0",
keywords = "formaldehyde, formic acid, photoelectron spectroscopy, temperature programmed reaction, titanium oxides, ENERGY-ELECTRON-DIFFRACTION, SINGLE-CRYSTAL SURFACES, CARBON BOND FORMATION, X-RAY PHOTOELECTRON, TIO2 RUTILE 001, METAL-OXIDES, 110 SURFACES, SPECTROSCOPY, ADSORPTION, PHOTOEMISSION",
author = "Hicham Idriss and Lusvardi, {V S} and Barteau, {M A}",
year = "1996",
month = "3",
day = "1",
doi = "10.1016/0039-6028(95)00979-5",
language = "English",
volume = "348",
pages = "39--48",
journal = "Surface Science Reports",
issn = "0167-5729",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - Two routes to formaldehyde from formic acid on TiO2(001) surfaces

AU - Idriss, Hicham

AU - Lusvardi, V S

AU - Barteau, M A

PY - 1996/3/1

Y1 - 1996/3/1

N2 - Two routes were observed for formaldehyde formation from formic acid on TiO2(001) single crystal surfaces. The first, on reduced surfaces, involves the reduction of formic acid to formaldehyde accompanied by the oxidation of surface Ti cations. Surface oxidation was evident from the increase in the portion of the Ti (2p(3/2)) signal corresponding to Ti4+ and the decrease in that corresponding to Ti-x+(0

AB - Two routes were observed for formaldehyde formation from formic acid on TiO2(001) single crystal surfaces. The first, on reduced surfaces, involves the reduction of formic acid to formaldehyde accompanied by the oxidation of surface Ti cations. Surface oxidation was evident from the increase in the portion of the Ti (2p(3/2)) signal corresponding to Ti4+ and the decrease in that corresponding to Ti-x+(0

KW - formaldehyde

KW - formic acid

KW - photoelectron spectroscopy

KW - temperature programmed reaction

KW - titanium oxides

KW - ENERGY-ELECTRON-DIFFRACTION

KW - SINGLE-CRYSTAL SURFACES

KW - CARBON BOND FORMATION

KW - X-RAY PHOTOELECTRON

KW - TIO2 RUTILE 001

KW - METAL-OXIDES

KW - 110 SURFACES

KW - SPECTROSCOPY

KW - ADSORPTION

KW - PHOTOEMISSION

U2 - 10.1016/0039-6028(95)00979-5

DO - 10.1016/0039-6028(95)00979-5

M3 - Article

VL - 348

SP - 39

EP - 48

JO - Surface Science Reports

JF - Surface Science Reports

SN - 0167-5729

IS - 1-2

ER -