A Pt Catalyst with Enhanced Three-Way Catalytic Activity Supported on CeO2 Modified with Al2O3 for Natural Gas Vehicles

被引：0

作者：

Wang, Xingmei ^{[1
]}

Huang, Chengsong ^{[1
]}

Wu, Bingcheng ^{[2
]}

Yang, Wenhu ^{[2
]}

Zhang, Yaliu ^{[2
]}

Xu, Yang ^{[1
]}

Jiao, Yi ^{[3
]}

Zhong, Lin ^{[1
]}

Wang, Jianli ^{[2
]}

机构：

[1] Sichuan Univ, Coll Chem Engn, Chengdu 610064, Sichuan, Peoples R China

[2] Sichuan Univ, Coll Chem, Key Lab Green Chem & Technol, Minist Educ, Chengdu 610064, Sichuan, Peoples R China

[3] Sichuan Univ, Inst New Energy & Low Carbon Technol, Chengdu 610064, Sichuan, Peoples R China

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2025年

基金：

中国国家自然科学基金;

关键词：

LOW-TEMPERATURE; CO OXIDATION; PD CATALYSTS; CERIA; PERFORMANCE; PT/AL2O3; METHANE; SURFACE; OXYGEN; PT/CEO2-AL2O3;

D O I：

10.1021/acs.iecr.4c04269

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Pt supported on CeO2 is a potential three-way catalyst (TWC) used in the aftertreatment of natural gas vehicle (NGV) exhaust emissions. However, the sintering of CeO2 occurs under harsh operating conditions (>600 degrees C). Herein, a series of Pt/Al2O3-CeO2 were prepared from the perspective of support modification to enhance the stability in CeO2 and the catalytic performance of the samples. XRD showed that the addition of 20 wt % Al2O3 (20AlCeO) improved the sintering resistance of CeO2. When the increase in the content of Al2O3 was continued, the crystal size of CeO2 remained nearly unchanged. The differences in CeO2 particle size and relative cerium content together affect the interaction between Pt and CeO2. The three-way catalytic performance was estimated under an NGV emission. It was found that Pt/20AlCeO exhibited the best TWC performances. According to H-2-TPR results, the addition of 20 wt % Al2O3 enhanced the redox performance of the Pt/20AlCeO sample compared with Pt/CeO2. However, with further increased Al2O3 content (>20 wt %), the interaction between Pt and CeO2 weakened, resulting in measurable degradation of the catalytic redox performance. XPS further showed that the Pt/20AlCeO sample has the highest oxygen vacancy and Pt4+ content. Therefore, the improvement in the activity of Pt/20AlCeO can be attributed to its excellent redox properties, abundant oxygen vacancies, and unique electronic properties. These results indicate an avenue to design an advanced Pt-based three-way catalyst with high activity and stability.

引用

页码：5854 / 5863

页数：10

共 56 条

[1] Jiang F., Yuan X., Hu L., Xie G., Zhang Z., Li X., Hu J., Wang C., Wang H., A comprehensive review of energy storage technology development and application for pure electric vehicles, J. Energy Storage, 86, (2024)
[2] Hou Y., Xu X., Optimized scheduling of energy-transport coupling systems considering uncertain traffic flow, J. Phys.: Conf. Ser., 2728, 1, (2024)
[3] Chen S., Li G., Competition between New Energy and Fuel Vehicles with Behavior-Based Pricing Strategies When Considering Environmental Concerns and Green Innovation, Sustainability, 16, 10, (2024)
[4] Thiruvengadam A., Besch M., Padmanaban V., Pradhan S., Demirgok B., Natural gas vehicles in heavy-duty transportation-A review, Energy Policy, 122, pp. 253-259, (2018)
[5] Qiu R.S., Wang W., Wang Z., Wang H.W., Advancement of modification engineering in lean methane combustion catalysts based on defect chemistry, Catal. Sci. Technol., 13, 8, pp. 2566-2584, (2023)
[6] Cargnello M., Jaen J.J.D., Garrido J.C.H., Bakhmutsky K., Montini T., Gamez J.J.C., Gorte R.J., Fornasiero P., Exceptional activity for methane combustion over modular Pd@CeO2 subunits on functionalized Al2O3, Science, 337, 6095, pp. 713-717, (2012)
[7] Feng Y.B., Zhu H.J., Dong Z.M., Simultaneous and Global Optimizations of LNG-Fueled Hybrid Electric Ship for Substantial Fuel Cost, CO2, and Methane Emission Reduction, IEEE Trans. Transp. Electrif., 9, 2, pp. 2282-2295, (2023)
[8] Lott P., Casapu M., Grunwaldt J.D., Deutschmann O., A review on exhaust gas after-treatment of lean-burn natural gas engines-From fundamentals to application, Appl. Catal. B., 340, (2024)
[9] Sverdrup H.U., Ragnarsdottir K.V., A system dynamics model for platinum group metal supply, market price, depletion of extractable amounts, ore grade, recycling and stocks-in-use, Resour. Conserv. Recycl., 114, pp. 130-152, (2016)
[10] Gelin P., Urfels L., Primet M., Tena E., Complete oxidation of methane at low temperature over Pt and Pd catalysts for the abatement of lean-burn natural gas fuelled vehicles emissions: influence of water and sulphur containing compounds, Catal. Today, 83, 1-4, pp. 45-57, (2003)

← 1 2 3 4 5 6 →