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

页码：2054 / 2057

页数：4

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