Cyclodextrin-Assisted Synthesis of Pd/Co/C Nanopolyhedra by ZIF-67 as a Highly Acid Tolerant Catalyst for Hexavalent Chromium Reduction

Lei Bai; Hongxing Zheng; Jie Ma; Jiao Wang; Zhongping Chen; Qiuxiang Huang

doi:10.1021/acs.inorgchem.9b01434

Cyclodextrin-Assisted Synthesis of Pd/Co/C Nanopolyhedra by ZIF-67 as a Highly Acid Tolerant Catalyst for Hexavalent Chromium Reduction

Inorg Chem. 2019 Jul 1;58(13):8884-8889. doi: 10.1021/acs.inorgchem.9b01434. Epub 2019 Jun 19.

Authors

Lei Bai¹, Hongxing Zheng², Jie Ma³, Jiao Wang⁴, Zhongping Chen¹, Qiuxiang Huang¹

Affiliations

¹ College of Chemistry and Materials Engineering , Anhui Science and Technology University , Bengbu , Anhui 233030 , China.
² School of Chemistry and Chemical Engineering , Liaocheng University , Liaocheng , Shandong 252059 , China.
³ College of Mechanical Engineering , Anhui Science and Technology University , Fengyang , Anhui 233100 , China.
⁴ College of Food Engineering , Anhui Science and Technology University , Fengyang , Anhui 233100 , China.

PMID: 31247862
DOI: 10.1021/acs.inorgchem.9b01434

Abstract

The palladium/cobalt/carbon (Pd/Co/C) nanopolyhedra were synthesized by calcinating the precursor prepared by a cyclodextrin (CD) modified palladium acetylacetonate loaded on ZIF-67, hydroxypropyl-β-cyclodextrin (HP-β-CD)-[Pd(acac)₂]/ZIF-67. On one hand, the HP-β-CD was used to increase the solubility of Pd(acac)₂ by supramolecular interactions, and on the other hand, ZIF-67 was employed to provide the Co/C as the magnetic support. The Pd/Co/C nanopolyhedra obtained with the assistance of HP-β-CD have high activity and reusability for the reduction of the dichromate ion in the presence of formic acid without using any buffer solution, and no significant leaching of metallic Co of the catalyst was observed. This could be ascribed to the fact that the presence of HP-β-CD could lead to a more homogeneous distribution of metallic Pd in the Pd/Co/C nanopolyhedra, which could prevent the dissolution of metallic Co by formic acid.