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Temperature-dependent reactions of phthalic acid on Ag(100)

Adsorption and temperature-dependent reactions of phthalic acid on Ag(100) in the temperature range 110–700 K were investigated by synchrotron radiation XPS, TPD and NEXAFS.

  Franke et al.,  Journal of Physical Chemistry C 119(2015) 23580-23585.


We have investigated the adsorption and temperature-dependent reactions of phthalic acid on Ag(100), in the temperature range 110–700 K, by synchrotron radiation X-ray photoelectron spectrocopy (SR-XPS), temperature-programmed desorption (TPD) and near-edge X-ray absorption fine structure (NEXAFS). Phthalic acid adsorbs intact at 110 K, but decomposes to phthalic anhydride and polyanhdride at 150 K. When heated further, phthalic anhydride desorbs at 250 K, leaving only polyanhydride on the surface, which at 350 K decomposes into a carboxylate, through desorption of phthalic anhydride and water. The carboxylate is stable until 500 K, after which it decomposes, through desorption of CO2 and benzene, into carbon; the latter diffuses into the bulk, leaving only a little carbon on the Ag(100) surface at 600 K.

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Temperature-dependent reactions of phthalic acid on Ag(100)
M. Franke, F. Marchini, L. Zhang, Q. Tariq, N. Tsud, M. Vorokhta, M. Vondráček, K.C. Prince, M. Röckert, F.J. Williams, H.-P. Steinrück, O. Lytken
Journal of Physical Chemistry C 119(2015) 23580-23585

DOI: 10.1021/acs.jpcc.5b07858
Last Updated on Saturday, 23 April 2016 16:28