TY - JOUR
T1 - Study of the azidoacetic acid adsorption in Ag (1 1 1)-C
AU - Dias, António A.
AU - Carrapa, Rodrigo
AU - Barros, M. T.
AU - Gasche, Teresa Almeida
AU - Teodoro, O. M. N. D.
AU - Costa, M. L.
AU - Vasconcelos Cabral, M. H.
AU - Moutinho, Augusto M. C.
N1 - The authors acknowledge the Portuguese Foundation for Science and Technology for the financial support to this work. It was partially supported through the project PRAXIS 2/2.1/QUI/386/94. A.A. Dias and R. Carrapa are grateful for financial support from PRAXIS XXI.
PY - 2002/1
Y1 - 2002/1
N2 - The interaction of the azidoacetic acid, N3CH2COOH, with an Ag (1 1 1) crystal modified by surface carbon has been observed. XPS measurements of C (1 s), O (1 s), N (1 s) and Ag 3d3/2,5/2 as a function of the exposure have been used to follow the predominant species rising with the azide adsorption. Dissociative chemisorption occurs at room temperature leading to the formation of molecular nitrogen followed by NCH2COOH, CHx, NCH2CHO, CO, CO2 and CN. The interaction is coverage dependent. The adsorption occurs preferentially around the carbon sites located on the silver surface. The surface decomposition can be related to studies developed for the same molecule in the gas phase. Measurements of work function changes are consistent with the XPS results and this combination is a promising approach to study adsorption.
AB - The interaction of the azidoacetic acid, N3CH2COOH, with an Ag (1 1 1) crystal modified by surface carbon has been observed. XPS measurements of C (1 s), O (1 s), N (1 s) and Ag 3d3/2,5/2 as a function of the exposure have been used to follow the predominant species rising with the azide adsorption. Dissociative chemisorption occurs at room temperature leading to the formation of molecular nitrogen followed by NCH2COOH, CHx, NCH2CHO, CO, CO2 and CN. The interaction is coverage dependent. The adsorption occurs preferentially around the carbon sites located on the silver surface. The surface decomposition can be related to studies developed for the same molecule in the gas phase. Measurements of work function changes are consistent with the XPS results and this combination is a promising approach to study adsorption.
KW - Adsorption
KW - Azide
KW - Carboxylic acid
KW - Catalysis
KW - Silver
KW - Surface chemical reaction
KW - Work function
KW - X-ray photoelectron spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=0036136415&partnerID=8YFLogxK
U2 - 10.1016/S0042-207X(01)00331-1
DO - 10.1016/S0042-207X(01)00331-1
M3 - Article
AN - SCOPUS:0036136415
SN - 0042-207X
VL - 64
SP - 445
EP - 450
JO - Vacuum
JF - Vacuum
IS - 3-4
ER -