Ultra‐Highly Active Ni‐Doped MOF‐5 Heterogeneous Catalysts for Ethylene Dimerization

Author:

Chen Cailing1ORCID,Meng Lingkun2,Alalouni Mohammed R.3,Dong Xinglong1ORCID,Wu Zhi‐Peng1ORCID,Zuo Shouwei4,Zhang Huabin4ORCID

Affiliation:

1. Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Thuwal 23955 Saudi Arabia

2. College of Pharmacy Changchun University of Chinese Medicine Changchun 130012 China

3. Catalyst Center of Excellence (CCoE) Research and Development Center Saudi Aramco Dhahran 31311 Saudi Arabia

4. KAUST Catalysis Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Thuwal 23955 Saudi Arabia

Abstract

AbstractHere, an ultra‐highly active Ni‐MOF‐5 catalyst with high Ni loading for ethylene dimerization is reported. The Ni‐MOF‐5 catalysts are synthesized by a facile one‐pot co‐precipitation method at room temperature, where Ni2+ replaces Zn2+ in MOF‐5. Unlike Zn2+ with tetrahedral coordination in MOF‐5, Ni2+ is coordinated with extra solvent molecules except for four‐oxygen from the framework. After removing coordinated solvent molecules, Ni‐MOF‐5 achieves an ethylene turnover frequency of 352 000 h−1, corresponding to 9040 g of product per gram of catalyst per hour, at 35 °C and 50 bar, far exceeding the activities of all reported heterogeneous catalysts. The high Ni loading and full exposure structure account for the excellent catalytic performance. Isotope labeling experiments reveal that the catalytic process follows the Cossee–Arlman mechanism, rationalizing the high activity and selectivity of the catalyst. These results demonstrate that Ni‐MOF‐5 catalysts are very promising for industrial catalytic ethylene dimerization.

Funder

King Abdullah University of Science and Technology

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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