Structure Evolution and Associated Catalytic Properties of PtSn Bimetallic Nanoparticles. Issue 34 (14th July 2015)

• Record Type: Journal Article
• Authors: Rong, Hongpan; Niu, Zhiqiang; Zhao, Yafan; Cheng, Hao; Li, Zhi; Ma, Lei; Li, Jun; Wei, Shiqiang; Li, Yadong
• Is Part Of: Chemistry. Volume 21:Issue 34(2015)
• Page Start: 12034
• Page End: 12041
• Publication Date: 2015-07-14
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201501442
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Bimetallic nanoparticles (NPs) often show new catalytic properties that are different from those of the parent metals. Carefully exploring the structures of bimetallic NPs is a prerequisite for understanding the structure‐associated properties. Herein, binary PtSn NPs with tunable composition are prepared in a controllable manner. X‐ray characterizations reveal that their structures evolve from SnO_{2−<italic>x</italic>}‐patched PtSn alloys to SnO_{2−<italic>x</italic>}‐patched Pt clusters when more tin is incorporated. An obvious composition‐dependent catalytic performance is observed for the hydrogenation of α, β‐unsaturated aldehydes: the selectivity to unsaturated alcohol increases substantially at high tin content, whereas the reaction rate follows a volcano shape. Furthermore, Pt sites are responsible for hydrogen dissociation, whereas oxygen vacancy (O_vac) sites, provided by SnO_{2−<italic>x</italic>}, drastically enhance the adsorption of carbonyl group.</p> </abstract>