Journal
INORGANIC CHEMISTRY
Volume 54, Issue 17, Pages 8639-8643Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.5b01278
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Funding
- 973 Program [2014CB239303]
- NSFC [21273035]
- Specialized Research Fund for the Doctoral Program of Higher Education [20123514110002]
- Independent Research Project of State Key Laboratory of Photocatalysis on Energy and Environment [2014A03]
- Award Program for Minjiang Scholar Professorship
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Different amounts of Co-substituted Ni-MOF-74 have been prepared via a post-synthetic metal exchange. Inductively coupled plasma mass spectrometry, powder X-ray diffraction (XRD), N-2 adsorption/desorption, and extended X-ray absorption fine structure (EXAFS) analyses indicated the successful metathesis between Co and Ni in Ni-MOF-74 to form the solid-solution-like mixed-metal Co/NiMOF-74. It was found that introduction of active Co into the Ni-MOF-74 framework enabled the inert Ni-MOF-74 to show activity for cyclohexene oxidation. Since Co was favorably substituted at positions more accessible to the substrate, the mixed-metal Co! Ni-MOF-74 showed superior catalytic performance, compared with pure Co-MOF-74 containing a similar amount of Co. This study provides a facile method to develop solid-solution-like MOFs for heterogeneous catalysis and highlights the great potential of this mixed-metal strategy in the development of MOFs with specific endowed functionalities.
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