Decomposition of formic acid on nickel

The decomposition of formic acid on nickel single crystals showed unusual features not observed on Cu(llO), Fe(lOO), Ag(110), or W(100) surfaces. Adsorption of isotopically labeled formic acid, HCCOD, or Ni(llO)... 

The role of the formate ion as an essential intermediate in the decomposition of formic acid on nickel metal [1-5] has not been quantitatively characterized, but its participation is consistent with the observations. It is probable, therefore, that the rate limiting steps for the catalytic reaction and the solid state decomposition of nickel formate are comparable. Further work is required to clarify the details of both reaction mechanisms. 

In a static decomposition of formic acid on nickel, in the zero-order pressure region, the reaction rate may be expected to remain constant as long as the formic acid pressure remains high enough and full coverage is maintained. Hence, in such a case the pressure in the reaction vessel will be observed to rise in linear relation to time. 

It was of course interesting to see if the same conclusions could be drawn [Fahrenfort et al. (12)] from the static decomposition of formic acid on nickel. Formic acid vapor was to this end brought into contact with a 13% Ni-on-silica catalyst, and the reaction products were analyzed after a long contact time and also after they had been rapidly removed from the catalyst by flushing with formic acid. The results are given in Table X. 

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See also in sourсe #XX -- [ ]

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