Journal
ACS CATALYSIS
Volume 9, Issue 7, Pages 5998-6005Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.9b00601
Keywords
atomic dispersion; defect-rich graphene; Pt nanocluster; dehydrogenation; heterogeneous catalysis
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Funding
- MOST [2016YFA0204100, 2017YFB0602200]
- NSFC of China [91845201, 21573254, 91545110, 21725301, 91645115, 21473003, 21821004]
- Youth Innovation Promotion Association, Chinese Academy of Science (CAS)
- Research Grants Council of Hong Kong [C6021-14E, 16306818]
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Tin-assisted fully exposed Pt clusters are fabricated on the core-shell nanodiamond@graphene (ND@G) hybrid support (a-PtSn/ND@G). The obtained atomically dispersed Pt clusters, with an average Pt atom number of 3, were anchored over the ND@G support by the assistance of Sn atoms as a partition agent and through the Pt-C bond between Pt clusters and defect-rich graphene nanoshell. The atomically dispersed Pt clusters guaranteed a full metal availability to the reactants, a high thermal stability, and an optimized adsorption/desorption behavior. It inhibits the side reactions and enhances catalytic performance in direct dehydrogenation of n-butane at a low temperature of 450 degrees C, leading to >98% selectivity toward olefin products, and the turnover frequency (TOF) of a-PtSn/ND@G is similar to 3.9 times higher than that of the traditional Pt3Sn alloy catalyst supported on Al2O3 (Pt3Sn/Al2O3).
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