@article {Millar:1994:0003-7028:827,
	author = "Millar, Graeme J. and Newton, David and Bowmaker, Graham A. and Cooney, Ralph P.",
	title = "In Situ FT-IR Investigation of Formic Acid Adsorption on Reduced and Reoxidized Copper Catalysts",
	journal = "Applied Spectroscopy",
	volume = "48",
	number = "7",
	year = "1994",
	abstract = "An <I>in situ</I> infrared cell capable of studying reactions over heterogeneous catalysts in the temperature range 77 to 773 K has been designed. In particular, the adsorption of formic acid on a model Cu/SiO<SUB>2</SUB> methanol synthesis catalyst was investigated. Exposure of a reduced copper surface to formic acid at 300 K resulted in the formation of both formic acid molecules, which were ligated to the copper catalyst, and chemisorbed bidentate copper formate species. Under temperature-programming conditions, the bidentate species displayed a maximum rate of desorption at 433 K, which correlates to a desorption activation energy of 120 kJ mol<SUP>-1</SUP>. In contrast, on the reoxidized catalyst, unidentate formate species were preferentially formed. These exhibited a maximum rate of desorption at a temperature of 408 K, and a desorption activation energy of 113 kJ mol<SUP>-1</SUP>. A mechanism was postulated to explain this behavior, and evidence was presented to show that useful kinetic data can be obtained for desorption from a catalyst in the form of a pressed disk.",
	pages = "827-832",
	url = "http://www.ingentaconnect.com/content/sas/sas/1994/00000048/00000007/art00010",
	doi = "doi:10.1366/0003702944029893",
	keyword = "In situ infrared, Copper catalyst, Formate adsorption"
}