Eye-Readable Detection and Oxidation of CO with a Platinum-Based Catalyst and a Binuclear Rhodium Complex

Jiafu Qu; Yueqiang Cao; Xuezhi Duan; Najun Li; Qingfeng Xu; Hua Li; Jinghui He; Dongyun Chen; Jianmei Lu

doi:10.1002/anie.201905567

Eye-Readable Detection and Oxidation of CO with a Platinum-Based Catalyst and a Binuclear Rhodium Complex

Angew Chem Int Ed Engl. 2019 Aug 26;58(35):12258-12263. doi: 10.1002/anie.201905567. Epub 2019 Jul 22.

Authors

Jiafu Qu¹, Yueqiang Cao², Xuezhi Duan², Najun Li¹, Qingfeng Xu¹, Hua Li¹, Jinghui He¹, Dongyun Chen¹, Jianmei Lu¹

Affiliations

¹ College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, 215123, P. R. China.
² State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China.

PMID: 31197913
DOI: 10.1002/anie.201905567

Abstract

Toxic gases that are colorless and odorless, such as CO, are a major environmental concern and require early detection to prevent serious toxicological effects. In this study, a unique system (Pt/HMSs-BRC) was fabricated by combining a catalyst (Pt/hollow mesoporous silica spheres, Pt/HMSs) with a silica gel containing an adsorbed chromogenic probe (binuclear rhodium complex, BRC). The process is a simple method to prepare well-dispersed and uniform Pt nanoparticles. The Pt/HMSs-BRC materials demonstrated early CO detection and excellent catalytic performance for CO oxidation. The probe exhibited remarkable color modulation from gray-violet to light-yellow when exposed to CO concentration levels above 50 ppm, and the color of the chromogenic probe was fully recoverable. By a kinetics-assisted discrimination method and DFT calculations, it was found that the corner Pt sites are the dominant active sites for CO oxidation.

Keywords: CO oxidation; binuclear rhodium complexes; heterogeneous catalysis; platinum; sensors.

Publication types

Review
Research Support, Non-U.S. Gov't