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Absence Of The Metal-Support Interaction For Ni/Tio2 Composites Prepared Using Ion-Exchange Techniques, Hans Conrad Zur Loye, Tanya Faltens, Angelica Stacy
Absence Of The Metal-Support Interaction For Ni/Tio2 Composites Prepared Using Ion-Exchange Techniques, Hans Conrad Zur Loye, Tanya Faltens, Angelica Stacy
Hans Conrad zur Loye
Many recent reports on the surface properties of transition-metalcatalysts dispersed on high surface area oxide supports have shown that the support can alter markedly the intrinsic activity of the metal. In particular, when group 8-10 metals are supported on reducible metal oxides, the surface chemistry and the electronic properties of the composite depend on the reduction temperature used for pretreatment. For example, the chemisorption of H2 at room temperature on metal-TiO2 composites decreases sharply as the reduction temperature used to prepare the catalyst is increased from 573 to 773 K. This change in surface chemistryhas been attributed to a strong …
Surface Chemistry Of Nickel Supported On TiNO2n-1, Hans Conrad Zur Loye, Tanya Faltens, Angelica Stacy
Surface Chemistry Of Nickel Supported On TiNO2n-1, Hans Conrad Zur Loye, Tanya Faltens, Angelica Stacy
Hans Conrad zur Loye
Small metal particles dispersed on inorganic oxides are among the most important heterogeneous catalysts. While the primary function of the oxide support is to increase the metal surface area, these supports can cause pronounced changes in the catalytic and chemisorption properties of the metal. In particular, metals supported on TiO2, have attracted attention due to the observation that activity and selectivity for Fischer-Tropsch synthesis can be altered, depending on the temperature a t which the metal Ti02 composite is reduced. Furthermore, H2 and CO chemisorption are suppressed for composites reduced at higher temperatures. In this paper, we show that the …