| Title: | A vicinal effect for promoting catalysis of Pd(1)/TiO(2): supports of atomically dispersed catalysts play more roles than simply serving as ligands |
| Author(s): | Liu P; Zhao Y; Qin R; Gu L; Zhang P; Fu G; Zheng N; |
| Address: | "Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China. Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. Department of Chemistry, Dalhousie University, Halifax, NS B3H4R2, Canada. Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China. Electronic address: nfzheng@xmu.edu.cn" |
| DOI: | 10.1016/j.scib.2018.03.002 |
| ISSN/ISBN: | 2095-9281 (Electronic) 2095-9273 (Linking) |
| Abstract: | "Atomically dispersing metal atoms on supports has been emerging as an effective strategy to maximize the atom utilization of metals for catalysis. However, due to the lack of effective tools to characterize the detailed structure of metal-support interface, the chemical functions of supports in atomically dispersed metal catalysts are hardly elucidated at the molecular level. In this work, an atomically dispersed Pd(1)/TiO(2) catalyst with Ti(III) vicinal to Pd is prepared and used to demonstrate the direct involvement of metal atoms on support in the catalysis of dispersed metal atoms. Systematic studies reveal that the Ti(III)-O-Pd interface facilitates the activation of O(2) into superoxide (O(2)(-)), thus promoting the catalytic oxidation. The catalyst exhibits the highest CO turn-over frequency among ever-reported Pd-based catalysts, and enhanced catalysis in the combustion of harmful volatile organic compound (i.e., toluene) and green-house gas (i.e., methane). The demonstrated direct involvement of metal atoms on oxide support suggests that the real active sites of atomically dispersed metal catalysts can be far beyond isolated metal atoms themselves. Metal atoms on oxide supports in the vicinity serve as another vector to promote the catalysis of atomically dispersed metal catalysts" |
| Keywords: | Ligand effect Oxidation reaction Single-atom catalyst Superoxide Support effect; |
| Notes: | "PubMed-not-MEDLINELiu, Pengxin Zhao, Yun Qin, Ruixuan Gu, Lin Zhang, Peng Fu, Gang Zheng, Nanfeng eng Netherlands 2018/06/15 Sci Bull (Beijing). 2018 Jun 15; 63(11):675-682. doi: 10.1016/j.scib.2018.03.002. Epub 2018 Mar 10" |
