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Updated: May 25, 2026

Synthesis and Catalytic Performance of Gold Intercalated in the Walls of Mesoporous Silica
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在模型 Al2O3 和 TiO2 支持的金纳米粒子上进行水气转移催化作用的尺寸和支效应

Mayank Shekhar1, Jun Wang, Wen-Sheng Lee

  • 1School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, United States.

Journal of the American Chemical Society
|February 10, 2012
PubMed
概括

黄金纳米粒子大小显著影响水气转移反应速率和动力学. 低协调的黄金矿床被确定为最活跃的,支持互动对水激活至关重要.

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相关概念视频

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
Catalysis02:50

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the surface of...