The reactivity of hydroxyl groups toward ammonia on Ni() surfaces

Thermal chemistry of diiodomethane on Ni(110) surfaces II. Effect of coadsorbed oxygen

“…In fact, hydroxide surface groups have been previously shown to facilitate both oxygen insertion and b-hydride elimination steps [9,35,36,38]. Similar chemistry has also been reported for both water [43,44] and ammonia [73,74] coadsorbed with oxygen on nickel surfaces. In those cases the facilitating role of oxygen in dehydrogenation was explained by the potential formation of hydrogen bonds on the surface.…”

The role of Oad in the decomposition of NH3 adsorbed on Ir(110): a combined TPD and high-energy resolution fast XPS study

“…They found that several forms of oxygen are present on the Cu(110) surface and that they have a different reactivity towards NH 3ad . They report NH 3 dissociation (due to active oxygen) at 80 K. The Zaera group 15,32 studied the effect of O ad and OH ad on NH 3 adsorption and decomposition on Ni(110). They found that both O ad and OH ad enhance NH 3 decomposition and suggest that the H-transfer from NH 3ad to O ad takes place via hydrogen bonding.…”

Should we be using bilateral carotid distal protection devices during the percutaneous closure of patent foramen ovale in patients with a history of paradoxical embolus?

“…This is illustrated by the data in Figure 5, where a direct correlation is indicated between the oxidation state of particular surface nickel atoms and the energy of adsorption of CO on those sites 121. Analogously, ammonia was used as a chemical probe for catalytic surfaces, in that case to characterize the acidity and reactivity of hydrogen atoms around oxygen‐containing sites, and also the ability of those sites to promote HD exchange reactions 124,125…”