Acid-base reactions on solid surfaces: The reactions of HCOOH, H2CO, and HCOOCH3 with oxygen on Ag(110)

Mechanism and active sites for the partial oxidation of methanol to formaldehyde over an electrolytic silver catalyst

“…Formic acid is produced through reaction between the surface HCOO (a) and H (a) species formed in Eq. (13) [54,55]. Schubert et al [14] found that selectivity to HCOOH increased with CH 3 OH/O 2 ratio, in good accord with our findings.…”

A microkinetic model of the methanol oxidation over silver

“…It is therefore reasonable to assume that methoxy decomposition is a slow process on silver. TPR studies of the decomposition of formic acid, formaldehyde, methanol and methyl formate have shown that CO 2 and H 2 desorbs simultaneously around 400 K [10,17,61,62]. The decompositions of all the above species are believed to go through the same formate intermediate [10,17].…”

“…(3)) as proposed by some investigators [8,11]. The methoxy and formate intermediates have been identified and studied with in situ Raman, HREELS, XPS, UPS, and TPR on both single crystals and polycrystalline silver catalysts [10,[12][13][14][15][16][17]. Surface science and density functional theory (DFT) calculations indicates that the mechanistic scheme of Wachs and Madix is general for the oxidation of alcohols on silver and other metal surfaces [12,[18][19][20].…”

Catalyst design for enhanced sustainability through fundamental surface chemistry

“…For instance, the principles defined for the reaction of alcohols on Au surfaces can be generalized further to fundamental concepts of acid-base chemistry [45][46][47]. Adsorbed O acts as a Brønsted base to abstract a hydrogen from a species BH, generating a negatively polarized species, B − .…”