Effect of MnOx phase on Pt-based catalyst for enhancing CO/C3H6/NO oxidation performance

被引：7
|
作者：
Liang, Yanli [1 ]
He, Darong [2 ]
Ding, Xinmei [2 ]
Wang, Jianli [2 ]
Zhao, Ming [2 ]
Chen, Yaoqiang [2 ]
机构：
[1] Sichuan Univ Sci & Engn, Sch Chem Engn, Zigong 643000, Peoples R China
[2] Sichuan Univ, Coll Chem, Key Lab Green Chem & Technol, Minist Educ, Chengdu 610064, Sichuan, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2022年 / 47卷 / 71期
基金：
中国国家自然科学基金;
关键词：
MnOx phase; Pt; Interface; Low-temperature performance; CO OXIDATION; PT/AL2O3; NO; SPECTROSCOPY; IMPROVE; IMPACT; ATOMS;
D O I：
10.1016/j.ijhydene.2022.07.041
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
To improve the fuel economy, it is crucial to promote the low-temperature performance in eliminating diesel emissions. The work investigates the impact of different MnO2/Mn2O3 phase ratio on the low-temperature performance of Pt-based monolithic diesel oxidation catalyst. Near equal ratio of MnOx phase could form the three-phase (platinum, MnO2, Mn2O3) interfacial structure, leading to the smaller platinum particle size and exhibiting the higher interface rate (1.6-11.1 times) than other mono-manganese oxide with plat-inum. Besides, the higher oxygen mobility and more active oxygen species could be contributed to the positive effect of Pt/MnOx interface, which are prevalent to activate the reactant and greatly enhance the TOF value (1.4-20.8 times). The results imply that the modification of multi-phase metal/oxide interface is potential in dispersing platinum for greatly enhancing the catalytic efficiency. (C) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：30722 / 30731
页数：10
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