Personal Profile
In recent years, with the rapid growth of fossil energy consumption, large amounts of volatile organic compounds (VOCs) and toxic gases such as carbon monoxide (CO) emitted from mobile sources (vehicles, ships, etc.) and fixed sources (industrial processes such as petroleum refining and petrochemical processing) have become the main air pollutants in China. At present, the main active components of catalysts for industrial purification of toxic gases such as VOCs and CO are precious metals such as Pt and Pd. However, the limited reserves and high prices of precious metals cannot effectively meet the needs of future environmental governance. Therefore, designing and developing efficient non precious metal catalysts is an urgent problem that needs to be solved.
Transition metals and their oxides are expected to become alternative catalysts for precious metals due to their high activity, low cost, and high storage capacity. Among transition metal catalysts, copper based catalysts have strong oxidation catalytic activity, and stable Cu+has long been considered as the active component of oxidation reactions. However, there are few examples that comprehensively explain the sources of stable Cu+in CuO/TiO2 systems. The oxidation of CO is a typical multiphase catalytic reaction that plays a central role in the control of automobile exhaust emissions, the development of industrial oxidation reactions, and the study of reaction mechanisms. We prepared CuO/TiO2 composite catalysts using the most commonly used co precipitation and impregnation methods in industry, and studied the catalytic activity and thermal stability of the composite catalyst using CO catalytic oxidation as a probe reaction. The formation and stability mechanism of highly active Cu (I) in CuO/TiO2 composite catalysts have been demonstrated through experimental and theoretical studies to be attributed to the Cu-O-Ti hybrid CuO (111) interface structure doped with Ti. Further in-depth research has shown that charge transfer (Ti → Cu) in the Cu-O-Ti hybrid system formed at this interface can generate a large amount of stable Cu+. In addition, in-situ infrared experiments have shown that Cu+can serve as an adsorption site for CO in the reaction. CO adsorbed on Cu+directly reacts with activated O atoms caused by Ti doping through the MvK mechanism, thereby improving reaction activity and stability. The relevant research content has been published in the international high-level journal ACS Applied Materials&Interfaces ACS Appl. Mater. Interfaces 2020, 12, 7091−7101
In addition, short alkenes represented by propylene (C3H6) are one of the main types of atmospheric VOCs. Due to its high photochemical ozone generation potential (POCP), propylene accounts for approximately 2.5% of the total VOCs emissions, but contributes 7% of ozone generation, making it one of the most active VOCs that cause photochemical smog. We have designed and synthesized Cu/Ti composite catalysts with low-temperature catalytic activity for propylene, further demonstrating the potential application prospects of Cu/Ti composite catalysts in the field of VOCs catalytic degradation. The relevant research content has been published in the top international journal Environmental Science&Technology.
Copper based non precious metal catalysts are prone to produce sulfates in practical applications, causing sulfur poisoning and catalyst deactivation, which to some extent limits their promotion and application. Single atom catalysts (SACs), as a novel and efficient catalyst, have new characteristics such as rapidly increasing surface free energy, quantum size effect, unsaturated coordination environment, and metal support interaction, which provide ideas for the preparation of high catalytic activity and high sulfur resistance copper based catalysts. Based on this research, we have applied for relevant patent technology (application number: 201811646323.2) and collaborated with the company to complete the pilot test, which has already achieved mass production. The product has been practically applied in the fixed source VOC waste gas treatment project. Meanwhile, we further investigated the sulfur resistance and mechanism of high stability single atom Cu/TiO2 catalysts. The relevant paper for this research work has been written and is awaiting publication.
Participate in the project:
1. National Thousand Talents Program Youth Talent Launch Fund Project: Low temperature catalytic oxidation of motor vehicle exhaust components.
2. National Engineering Laboratory Fund Project for Mobile Source Pollution Emission Control Technology: Design and Development of Low Precious Metal, High Stability Diesel Exhaust Oxidation Catalyst
Research Direction
Exploration of surface activation mechanism and reaction mechanism of non precious metal based catalysts
Degradation of small molecule gas-phase pollutants
Educational Background
From July 2012 to July 2016 , Yangtze University , College of Petroleum Engineering , Bachelor
From September 2016 to July 2021 , Huazhong Normal University , College of Chemistry , Ph.D. candidate
Work Experience
Previously awarded
2018 Huazhong Normal University Graduate Excellent Scholarship (2000 yuan)
2019 Outstanding Doctoral Dissertation Cultivation Program of Central China Normal University (20000)
2020 Excellent Doctoral Dissertation Cultivation Plan of the School of Chemistry, Central China Normal University (20000)
Third Prize of Academic Scholarship from the School of Chemistry, Central China Normal University
Academic report
The 11th National Conference on Environmental Catalysis and Environmental Materials (Shenyang): Performance of Interface Stable Cu (I) and Its CO Low Temperature Catalytic Oxidation (Poster);
The 10th National Conference on Environmental Chemistry (Tianjin): Exploration of the Properties of Cu (I) Active Sites in CuO/TiO2 Low Temperature Catalytic Oxidation of CO (Conference Paper Abstract)
