Understanding the effect of thermal treatments on the structure of CuAu/SiO2catalysts and their performance in propene oxidation

文献情報

出版日 2011-01-31

DOI 10.1039/C0CY00003E

インパクトファクター 6.119

著者

Charlotte L. Bracey, Albert F. Carley, Jennifer K. Edwards, Peter R. Ellis, Graham J. Hutchings

原文を見る

要旨

The synthesis and catalytic application of supported CuAu is discussed. Different thermal treatments of a dried precursor of copper nitrate and tetrachloroauric acid on silica lead to catalysts with significantly different structures and properties. Direct calcination gives a catalyst which contains very large gold ensembles with minimal interaction with the copper present. Hydrogen reduction of the dried precursor leads to the formation of copper–gold alloy nanoparticles. Subsequent high temperature calcination de-alloys the copper from the gold to a significant extent. The presence of gold stabilises the formation of Cu+ on this catalyst. The activity and selectivity observed in the oxidation of propene with molecular oxygen, with or without co-fed hydrogen, depends on the pre-treatment, reaction conditions and the ratio of copper to gold in the catalyst. A number of different catalytic active sites are identified and discussed.

掲載誌

Catalysis Science & Technology

CiteScore: 5.91

自己引用率: 4.5%

年間論文数: 600

Catalysis Science & Technology is committed to publishing research reporting high-quality, cutting-edge developments across the catalysis community at large. The journal places equal focus on publications from the heterogeneous, homogeneous, thermo-, electro-, photo-, organo- and biocatalysis communities. Works published in the journal feature a balanced mix of fundamental, technology-oriented, experimental, computational, digital and data-driven original research, thus appealing to catalysis practitioners in both academic and industrial environments. Original research articles published in the journal must demonstrate new catalytic discoveries and/or methodological advances that represent a significant advance on previously published work, from the molecular to the process scales. We welcome rigorous research in a wide range of timely or emerging applications related to the environment, health, energy and materials. Catalysis Science & Technology publishes Communications, Articles, Reviews and Perspectives. More details regarding manuscript types may be found in the Information for Authors section.