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Insights into Chlorobenzene Catalytic Oxidation over Noble Metal Loading {001}-TiO2: The Role of NaBH4 and Subnanometer Ru Undergoing Stable Ru0 <-> Ru4+Circulation
Sun, Bohua; Li, Qianqian; Su, Guijin; Meng, Bowen; Wu, Mingge; Zhang, Qifan; Meng, Jing; Shi, Bin
2022-09-20
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN0013-936X
Issue0Pages:1-11
AbstractCatalytic combustion of ubiquitous chlorinated volatile organic compounds (CVOCs) encounters bottlenecks regarding catalyst deactivation by chlorine poisoning and generation of toxic polychlorinated byproducts. Herein, Ru, Pd, and Rh were loaded on {001}-TiO2 for thermal catalytic oxidation of chlorobenzene (CB), with Ru/{001}-TiO2 representing superior reactivity, CO2 selectivity, and stability in the 1000 min on-stream test. Interestingly, both acid sites and reactive active oxygen species (ROS) were remarkably promoted via adding NaBH4. But merely enhancing these active sites of the catalyst in CVOC treatment is insufficient. Continuous deep oxidation of CB with effective Cl desorption is also a core issue successfully tackled through the steady Ru0 <-> Ru4+ circulation. This circulation was facilitated by the observed higher subnanometer Ru dispersion on {001}-TiO2 than the other two noble metals that was supported by single atom stability DFT calculation. Nearly 88 degradation products in off-gas were detected, with Ru/{001}-TiO2 producing the lowest polychlorinated benzene byproducts. An effective and sustainable CB degradation mechanism boosted by the cooperation of NaBH4 enhanced active sites and Ru circulation was proposed accordingly. Insights gained from this study open a new avenue to the rational design of promising catalysts for the treatment of CVOCs.
Department环境纳米技术与健康效应重点实验室 ; 环境纳米技术与健康效应重点实验室
KeywordSINGLE-ATOM 001 FACETS TIO2 DEGRADATION FORMALDEHYDE COMBUSTION PERFORMANCE ACTIVATION ADSORPTION REDUCTION
Document Type期刊论文
Identifierhttps://ir.rcees.ac.cn/handle/311016/47660
Collection环境纳米技术与健康效应重点实验室
Corresponding AuthorSu, Guijin
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Environm Nanotechnol & Hlth Effects, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Sun, Bohua,Li, Qianqian,Su, Guijin,et al. Insights into Chlorobenzene Catalytic Oxidation over Noble Metal Loading {001}-TiO2: The Role of NaBH4 and Subnanometer Ru Undergoing Stable Ru0 <-> Ru4+Circulation[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022(0):1-11.
APA Sun, Bohua.,Li, Qianqian.,Su, Guijin.,Meng, Bowen.,Wu, Mingge.,...&Shi, Bin.(2022).Insights into Chlorobenzene Catalytic Oxidation over Noble Metal Loading {001}-TiO2: The Role of NaBH4 and Subnanometer Ru Undergoing Stable Ru0 <-> Ru4+Circulation.ENVIRONMENTAL SCIENCE & TECHNOLOGY(0),1-11.
MLA Sun, Bohua,et al."Insights into Chlorobenzene Catalytic Oxidation over Noble Metal Loading {001}-TiO2: The Role of NaBH4 and Subnanometer Ru Undergoing Stable Ru0 <-> Ru4+Circulation".ENVIRONMENTAL SCIENCE & TECHNOLOGY .0(2022):1-11.
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