Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 52, Issue 7, Pages 4244-4255Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.7b05996
Keywords
-
Categories
Funding
- National Key R&D Program of China [2016YFA0203102]
- National Natural Science Foundation of China [21577157, 21777177]
- Strategic Priority Research Program of the CAS [XDB14020101]
- Youth Innovation Promotion Association of CAS
Ask authors/readers for more resources
AuPd bimetallic nanocatalysts exhibit superior catalytic performance in the cleavage of carbon halogen bonds (C-X) in the hazardous halogenated pollutants. A better understanding of how Au atoms promote the reactivity of Pd sites rather than vaguely interpreting as bimetallic effect and determining which type of Pd sites are necessary for these reactions are crucial factors for the design of atomically precise nanocatalysts that make full use of both the Pd and Au atoms. Herein, we systematically manipulated the coordination number of Pd Pd, d-orbital occupation state, and the Au-Pd interface of the Pd reactive centers and studied the structure activity relationship of Au Pd in the catalyzed cleavage of C-X bonds. It is revealed that Au enhanced the activity of Pd atoms primarily by increasing the occupation state of Pd d-orbitals. Meanwhile, among the Pd sites formed on the Au surface, five to seven contiguous Pd atoms, three or four adjacent Pd atoms, and isolated Pd atoms were found to be the most active in the cleavage of C-Cl, C-Br, and C-I bonds, respectively. Besides, neighboring Au atoms directly contribute to the weakening of the C-Br/C-I bond. This work provides new insight into the rational design of bimetallic metal catalysts with specific catalytic properties.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available