Hollow Zn/Co ZIF Particles Derived from Core-Shell ZIF-67@ZIF-8 as Selective Catalyst for the Semi-Hydrogenation of Acetylene

Jian Yang; Fengjun Zhang; Haiyuan Lu; Xun Hong; Hailong Jiang; Yuen Wu; Yadong Li

doi:10.1002/anie.201504242

Hollow Zn/Co ZIF Particles Derived from Core-Shell ZIF-67@ZIF-8 as Selective Catalyst for the Semi-Hydrogenation of Acetylene

Angew Chem Int Ed Engl. 2015 Sep 7;54(37):10889-93. doi: 10.1002/anie.201504242.

Authors

Jian Yang¹, Fengjun Zhang¹, Haiyuan Lu^{2

3}, Xun Hong^{2

3}, Hailong Jiang⁴, Yuen Wu^{5

6}, Yadong Li^{7

8}

Affiliations

¹ Center of Advanced Nanocatalysis, University of Science and Technology of China (CAN-USTC), Anhui Key Laboratory of Advanced Building Materials, Anhui Jianzhu University, Hefei, Anhui 230026 (P.R. China).
² Center of Advanced Nanocatalysis, University of Science and Technology of China (CAN-USTC), Hefei, Anhui 230026 (P.R. China).
³ Department of Chemistry, Tsinghua University, Beijing 100084 (P.R. China).
⁴ Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026 (P.R. China).
⁵ Center of Advanced Nanocatalysis, University of Science and Technology of China (CAN-USTC), Hefei, Anhui 230026 (P.R. China). yuenwu@ustc.edu.cn.
⁶ Department of Chemistry, Tsinghua University, Beijing 100084 (P.R. China). yuenwu@ustc.edu.cn.
⁷ Center of Advanced Nanocatalysis, University of Science and Technology of China (CAN-USTC), Hefei, Anhui 230026 (P.R. China). ydli@mail.tsinghua.edu.cn.
⁸ Department of Chemistry, Tsinghua University, Beijing 100084 (P.R. China). ydli@mail.tsinghua.edu.cn.

PMID: 26333054
DOI: 10.1002/anie.201504242

Abstract

The rational design of metal-organic frameworks (MOFs) with hollow features and tunable porosity at the nanoscale can enhance their intrinsic properties and stimulates increasing attentions. In this Communication, we demonstrate that methanol can affect the coordination mode of ZIF-67 in the presence of Co(2+) and induces a mild phase transformation under solvothermal conditions. By applying this transformation process to the ZIF-67@ZIF-8 core-shell structures, a well-defined hollow Zn/Co ZIF rhombic dodecahedron can be obtained. The manufacturing of hollow MOFs enables us to prepare a noble metal@MOF yolk-shell composite with controlled spatial distribution and morphology. The enhanced gas storage and porous confinement that originate from the hollow interior and coating of ZIF-8 confers this unique catalyst with superior activity and selectivity toward the semi-hydrogenation of acetylene.

Keywords: core-shell particles; metal-organic frameworks; semi-hydrogenation of acetylene; zeolite imidazolate frameworks.