A unified intermediate and mechanism for soot combustion on potassium-supported oxides

	A unified intermediate and mechanism for soot combustion on potassium-supported oxides
	Li, Q; Wang, X; Xin, Y; Zhang, ZL; Zhang, YX; Hao, C; Meng, M; Zheng, LR; Zheng, L;郑黎荣; Zheng L(郑雷)
刊名	SCIENTIFIC REPORTS
	2014
卷号	4 页码:4725
英文摘要	The soot combustion mechanism over potassium-supported oxides (MgO, CeO2 and ZrO2) was studied to clarify the active sites and discover unified reaction intermediates in this typical gas-solid-solid catalytic reaction. The catalytically active sites were identified as free K+ rather than K2CO3, which can activate gaseous oxygen. The active oxygen spills over to soot and forms a common intermediate, ketene, before it was further oxidized into the end product CO2. The existence of ketene species was confirmed by density functional theory (DFT) calculations. The oxygen spillover mechanism is proposed, which is explained as an electron transfer from soot to gaseous oxygen through the active K+ sites. The latter mechanism is confirmed for the first time since it was put forward in 1950, not only by ultraviolet photoelectron spectroscopy (UPS) results but also by semi-empirical theoretical calculations.
学科主题	Science & Technology - Other Topics
收录类别	SCI
WOS记录号	WOS:000334401600007
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/225368]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Li, Q,Wang, X,Xin, Y,et al. A unified intermediate and mechanism for soot combustion on potassium-supported oxides[J]. SCIENTIFIC REPORTS,2014,4:4725.
APA	Li, Q.,Wang, X.,Xin, Y.,Zhang, ZL.,Zhang, YX.,...&郑雷.(2014).A unified intermediate and mechanism for soot combustion on potassium-supported oxides.SCIENTIFIC REPORTS,4,4725.
MLA	Li, Q,et al."A unified intermediate and mechanism for soot combustion on potassium-supported oxides".SCIENTIFIC REPORTS 4(2014):4725.