title: Platinum-nickel frame within metal-organic framework fabricated in situ for hydrogen enrichment and molecular sieving.
abstract: Developing catalysts that provide the effective activation of hydrogen and selective absorption of substrate on metal surface is crucial to simultaneously improve activity and selectivity of hydrogenation reaction. Here we present an unique in situ etching and coordination synthetic strategy for exploiting a functionalized metal-organic framework to incorporate the bimetallic platinum-nickel frames, thereby forming a frame within frame nanostructure. The as-grown metal-organic framework serves as a 'breath shell' to enhance hydrogen enrichment and activation on platinum-nickel surface. More importantly, this framework structure with defined pores can provide the selective accessibility of molecules through its one-dimensional channels. In a mixture containing four olefins, the composite can selectively transport the substrates smaller than its pores to the platinum-nickel surface and catalyse their hydrogenation. This molecular sieve effect can be also applied to selectively produce imines, which are important intermediates in the reductive imination of nitroarene, by restraining further hydrogenation via cascade processes.
authors.affiliation: Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Li
authors.affiliation: Beijing National Center for Electron Microscopy, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Yu
authors.affiliation: Beijing National Center for Electron Microscopy, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Jinglu
authors.initials: J
authors.lastname: Huang
authors.affiliation: Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Yusheng
authors.initials: Y
authors.lastname: Shi
authors.affiliation: Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Diyang
authors.initials: D
authors.lastname: Zhang
authors.affiliation: Beijing National Center for Electron Microscopy, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Zhong
authors.affiliation: Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing 100084, China.
authors.forename: Dingsheng
authors.initials: D
authors.lastname: Wang
authors.affiliation: Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing 100084, China.|Center of Advanced Nanocatalysis (CAN-USTC), University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Yuen
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Department of Chemistry and Collaborative Innovation Center for Nanomaterial Science and Engineering, Tsinghua University, Beijing 100084, China.|Center of Advanced Nanocatalysis (CAN-USTC), University of Science and Technology of China, Hefei, Anhui 230026, China.
authors.forename: Yadong
authors.initials: Y
authors.lastname: Li