Fully-exposed Pt clusters stabilized on Sn-decorated nanodiamond/graphene hybrid support for efficient ethylbenzene direct dehydrogenation  

作　　者：Linlin Wang Xuetao Qin Ting Sun Xiangbin Cai Mi Peng Zhimin Jia Xiaowen Chen Ning Wang Jiangyong Diao Hongyang Liu Ding Ma 

机构地区：[1]Department of Chemistry,Northeastern University,Shenyang,110819,China [2]Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,China [3]Beijing National Laboratory for Molecular Engineering,College of Chemistry and Molecular Engineering and College of Engineering,BIC-ESAT,Peking University,Beijing,100871,China [4]Department of Physics,Hong Kong University of Science and Technology,Kowloon,Hong Kong,999077,China [5]School of Materials Science and Engineering,University of Science and Technology of China,Hefei,230026,China

出　　处：《Nano Research》2022年第12期10029-10036,共8页纳米研究（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2021YFA1502802);the National Natural Science Foundation of China(Nos.21961160722,92145301,U21B2092,22072162,and 91845201);the Liaoning Revitalization Talents Program(No.XLYC1907055);Natural Science Foundation of Liaoning Province(No.2021-MS001);IMR Innovation Fund(No.2022-PY05);Dalian National Lab for Clean Energy(No.DNL Cooperation Fund 202001);the Sinopec China.N.W.hereby acknowledges the funding support from the Research Grants Council of Hong Kong(Nos.C6021-14E,N_HKUST624/19,and 16306818);The XAS experiments were conducted in Shanghai Synchrotron Radiation Facility(SSRF)。

摘　　要：The pursuit of energy conservation and environmental protection has always been a hot topic in the catalytic fields,which is inseparable from the rational designing of efficient catalysts and an in-depth understanding of the catalytic reaction mechanism.In this work,fully-exposed Pt clusters were fabricated on the atomically dispersed Sn decorated nanodiamond/graphene(Sn-ND@G)hybrid support and employed for direct dehydrogenation(DDH)of ethylbenzene(EB)to styrene(ST).The detailed structural characterizations revealed the fully-exposed Pt clusters were stabilized on Sn-ND@G,assisted by the spatial separation of atomically dispersed Sn species.The as-prepared Pt/Sn-ND@G catalyst showed enhanced ST yield(136.2 molEB·molpt-1·h-1 EB conversion rate and 99.7%ST selectivity)and robust long-term stability at 500℃for the EB DDH reaction,compared with the traditional ND@G supported Pt nanoparticle catalyst(Pt/ND@G).The ST prefers to desorb from the fully-exposed Pt clusters,resulting in the enhanced DDH catalytic performance of the Pt/Sn-ND@G catalyst.The present work paves a new way for designing highly dispersed and stable supported metal catalysts for DDH reactions.

关 键 词：Pt cluster ethylbenzene dehydrogenation fully-exposed catalyst heterogeneous catalysis 

分 类 号：O64[理学—物理化学]