| Title: | Engineering Platinum Catalysts via a Site-Isolation Strategy with Enhanced Chlorine Resistance for the Elimination of Multicomponent VOCs |
| Author(s): | Gao R; Zhang M; Liu Y; Xie S; Deng J; Ke X; Jing L; Hou Z; Zhang X; Liu F; Dai H; |
| Address: | "Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, Department of Environmental Chemical Engineering, Beijing University of Technology, Beijing 100124, China. Beijing Key Laboratory of Microstructure and Properties of Solids, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China. Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC), University of Central Florida, Orlando, Florida 32816, United States" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Linking) |
| Abstract: | "Pt-based catalysts can be poisoned by the chlorine formed during the oxidation of multicomponent volatile organic compounds (VOCs) containing chlorinated VOCs. Improving the low-temperature chlorine resistance of catalysts is important for industrial applications, although it is yet challenging. We hereby demonstrate the essential catalytic roles of a bifunctional catalyst with an atomic-scale metal/oxide interface constructed by an intermetallic compound nanocrystal. Introducing trichloroethylene (TCE) exhibits a less negative effect on the catalytic activity of the bimetallic catalyst for o-xylene oxidation, and the partial deactivation caused by TCE addition is reversible, suggesting that the bimetallic, HCl-etched Pt(3)Sn(E)/CeO(2) catalyst possesses much stronger chlorine resistance than the conventional Pt/CeO(2) catalyst. On the site-isolated Pt-Sn catalyst, the presence of aromatic hydrocarbon significantly inhibits the adsorption strength of TCE, resulting in excellent catalytic stability in the oxidation of the VOC mixture. Furthermore, the large amount of surface-adsorbed oxygen species generated on the electronegative Pt is highly effective for low-temperature C-Cl bond dissociation. The adjacent promoter (Sn-O) possesses the functionality of acid sites to provide sufficient protons for HCl formation over the bifunctional catalyst, which is considered critical to maintaining the reactivity of Pt by removing Cl and decreasing the polychlorinated byproducts" |
| Keywords: | Pt-based bimetallic catalysts chlorine-resistance ability intermetallic compound o-xylene abatement volatile organic compound; |
| Notes: | "PubMed-not-MEDLINEGao, Ruyi Zhang, Manchen Liu, Yuxi Xie, Shaohua Deng, Jiguang Ke, Xiaoxing Jing, Lin Hou, Zhiquan Zhang, Xing Liu, Fudong Dai, Hongxing eng 2022/06/22 Environ Sci Technol. 2022 Jul 5; 56(13):9672-9682. doi: 10.1021/acs.est.2c00437. Epub 2022 Jun 21" |
