Tin-Assisted Fully Exposed Platinum Clusters Stabilized on Defect-Rich Graphene for Dehydrogenation Reaction

Jiayun Zhang(University of Science and Technology of China), Yuchen Deng(Peking University), Xiangbin Cai(Hong Kong University of Science and Technology), Yunlei Chen(Institute of Coal Chemistry), Mi Peng(Peking University), Zhimin Jia(University of Science and Technology of China), Zheng Jiang(Chinese Academy of Sciences), Pengju Ren(Institute of Coal Chemistry), Siyu Yao(Peking University), Jinglin Xie(Peking University), Dequan Xiao(University of New Haven), Xiaodong Wen(Institute of Coal Chemistry), Ning Wang(Hong Kong University of Science and Technology), Hongyang Liu(University of Science and Technology of China), Ding Ma(Peking University)
ACS Catalysis
March 27, 2019
10.1021/acscatal.9b00601
Cited by 199

Abstract

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 °C, leading to >98% selectivity toward olefin products, and the turnover frequency (TOF) of a-PtSn/ND@G is ∼3.9 times higher than that of the traditional Pt3Sn alloy catalyst supported on Al2O3 (Pt3Sn/Al2O3).

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