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Titolo:
In situ STM study of surface catalytic reactions on TiO2(110) relevant to catalyst design
Autore:
Iwasawa, Y; Onishi, H; Fukui, K;
Indirizzi:
Univ Tokyo, Grad Sch Sci, Dept Chem, Bunkyo Ku, Tokyo 1130033, Japan Univ Tokyo Tokyo Japan 1130033 ept Chem, Bunkyo Ku, Tokyo 1130033, Japan
Titolo Testata:
TOPICS IN CATALYSIS
fascicolo: 1-4, volume: 14, anno: 2001,
pagine: 163 - 172
SICI:
1022-5528(2001)14:1-4<163:ISSSOS>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
SCANNING-TUNNELING-MICROSCOPY; ATOMIC-FORCE MICROSCOPE; ELECTRON-STIMULATED DESORPTION; SINGLE-CRYSTAL SURFACES; OXIDE SURFACES; RESOLVED OBSERVATION; FORMATE; ADSORPTION; TIO2; VISUALIZATION;
Keywords:
scanning tunneling microscopy (STM); non-contact atomic force microscopy (AFM); surface structures; catalytic reaction mechanisms; formic acid; TiO2(110);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Iwasawa, Y Univ Tokyo, Grad Sch Sci, Dept Chem, Bunkyo Ku, Tokyo 1130033, Japan Univ Tokyo Tokyo Japan 1130033 unkyo Ku, Tokyo 1130033, Japan
Citazione:
Y. Iwasawa et al., "In situ STM study of surface catalytic reactions on TiO2(110) relevant to catalyst design", TOP CATAL, 14(1-4), 2001, pp. 163-172

Abstract

This paper briefly summarizes our recent work on the characterization of atom-resolved surface images of TiO2(110) composed of Ti atoms, O atoms, defects and hydroxyls by scanning tunneling microscopy (STM) and non-contact atomic force microscopy (NC-AFM). The paper also presents new kinetic aspects in the catalytic dehydration and dehydrogenation of formic acid on the characterized surface. Switchover of the reaction path from the dehydration to the dehydrogenation occurred by the presence of formic acid undetectable at the surface, where acidic formic acid molecules opened the basic catalysis. In situ STM observation revealed that the dehydrogenation reaction at 400-450 K was strongly suppressed in the vicinity of single-atom height steps. The suppressive effect of step ranged over 2.4 nm into terrace. It is likely that the catalyst with flat surfaces larger than 5 nm is active for the dehydrogenation of formic acid.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/11/20 alle ore 10:46:04