Activation of Surface Lattice Oxygen in Ceria Supported Pt/Al2O3 Catalyst for Low-Temperature Propane Oxidation

被引：30
|
作者：
Wang, Chengxiong [1 ,2 ]
Feng, Feng [2 ]
Du, Junchen [1 ,2 ]
Zheng, Tingting [1 ,2 ]
Pan, Zaifu [2 ]
Zhao, Yunkun [1 ,2 ]
机构：
[1] Kunming Inst Precious Met, State Key Lab Adv Technol Comprehens Utilizat Pla, Kunming 650106, Yunnan, Peoples R China
[2] Kunming Sino Platinum Met Catalysts Co Ltd, State Local Joint Engn Lab Precious Met Catalyt T, Kunming 650106, Yunnan, Peoples R China
来源：
CHEMCATCHEM | 2019年 / 11卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Pt; ceria interfaces; oxidative redispersion; C-H bond activation; RAY PHOTOELECTRON-SPECTROSCOPY; COMBUSTION ACTIVITY; PLATINUM; IR; BEHAVIOR; XPS; CO; DEACTIVATION;
D O I：
10.1002/cctc.201900190
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：
The synergy between active Pt species and ceria results in the presence of more coordinately unsaturated Pt2+ and Pt4+ species, which were found to be critical to drive C- and C-H bonds activation and enhance propane oxidation. Surface lattice oxygen on ceria in the vicinity of electron-deficient Pt species provides the enhanced reactivity for low-temperature propane oxidation. The reducibility and amount of activated surface oxygen species play a significant role in improving the reaction rates of propane oxidation in the 150 similar to 300 degrees C temperature range. Ceria effectively promotes oxidative redispersion of platinum crystallites supported on alumina during propane oxidation in O-2-rich conditions, due to the unique ability to trap and stabilize ionic platinum.
引用
收藏
页码：2054 / 2057
页数：4
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