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Chemisorption
About: Chemisorption is a research topic. Over the lifetime, 16298 publications have been published within this topic receiving 554989 citations.
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TL;DR: In this paper, it was suggested that the decrease in hydrogen chemisorption capacity, hydrogenolysis selectivity, and number of holes in the d-band are related to the change in the structure of the metal-support interface.
175 citations
TL;DR: In this article, reaction rates and saturation values were determined for H2 dissociative chemisorption on positive niobium cluster ions in an FT-ICR apparatus.
Abstract: Reaction rates and saturation values were determined for H2 dissociative chemisorption on positive niobium cluster ions in an FT‐ICR apparatus. Clusters with 8,10,12, and 16 atoms were found to be particularly unreactive, in remarkable agreement with the reactivity patterns observed previously for neutral niobium clusters. Saturation coverage for most clusters was found to occur near a hydrogen/niobium ratio of 1.3, although some clusters (8–12,16, and 19) reached effectively inert compositions at considerably lower coverages. Several examples were found of clusters having two isomeric forms with different reactivities. One form of Nb+19 was found to readily react with H2, whereas a second form representing one‐third of the original sample of 19 atom clusters was completely inert to H2 chemisorption under the same FT‐ICR conditions. The geometrical shape of these niobium clusters must therefore have a critical effect on reactivity.
175 citations
TL;DR: In this paper, the binding energy of CO on the non-defective TiO2(110) surface is 9.9 kcal/mole in the limit of zero coverage, which suggests that CO adsorbs more strongly on lattice Ti sites in the vicinity of anion vacancy sites.
Abstract: CO chemisorption has been studied on TiO2(110) under surface conditions where oxygen anion vacancy sites are not present (oxidized surface), compared to conditions where the vacancy sites are present (annealed surface). The binding energy of CO on the nondefective TiO2(110) surface is 9.9 kcal/mole in the limit of zero coverage. CO...CO repulsive interactions have been observed at higher coverages. When anion vacancy sites are produced under controlled annealing conditions in vacuum at 900 K, a significant increase in the desorption temperature of a portion of the chemisorbed CO is observed. This observation, coupled with measurements showing that defective TiO2(110) does not have enhanced CO chemisorption capacity, suggests that CO adsorbs more strongly on lattice Ti sites in the vicinity of anion vacancy sites. It is postulated that enhanced CO bonding occurs via the interaction of the O moiety of CO with the anion vacancy site while primary adsorbate bonding occurs via the C moiety to Ti lattice sites. Neither CO2 production nor oxygen exchange in CO occurs when CO desorbs from defective TiO2(110).
175 citations
TL;DR: The advantages of nontoxicity, high stability, high As adsorption capacity, low-cost and easy availability confirm the highly promising application of zirconium metal-organic frameworks in As-contaminated wastewater remediation.
175 citations