Direct Identification of Active Surface Species for the Water-Gas Shift Reaction on a Gold-Ceria Catalyst

doi:10.1021/jacs.8b09306

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Direct Identification of Active Surface Species for the Water-Gas Shift Reaction on a Gold-Ceria Catalyst
	Fu, XP ; Gno, LW ; Wang, WW ; Ma, C ; Jia, CJ ; Wu, K ; Si, R ; Sun, LD ; Yan, CH
刊名	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
	2019
卷号	141 期号:11 页码:4613—4623
关键词	SUPPORTED GOLD CEO2 AU SPECTROSCOPY AU/CEO2 NANOPARTICLES MECHANISM OXIDATION INTERFACE REACTANT
ISSN号	0002-7863
DOI	10.1021/jacs.8b09306
文献子类	期刊论文
英文摘要	The crucial role of the metal-oxide interface in the catalysts of the water-gas shift (WGS) reaction has been recognized, while the precise illustration of the intrinsic reaction at the interfacial site has scarcely been presented. Here, two kinds of gold-ceria catalysts with totally distinct gold species, <2 nm clusters and 3 to 4 nm particles, were synthesized as catalysts for the WGS reaction. We found that the gold cluster catalyst exhibited a superiority in reactivity compared to gold nanoparticles. With the aid of comprehensive in situ characterization techniques, the bridged -OH groups that formed on the surface oxygen vacancies of the ceria support are directly determined to be the sole active configuration among various surface hydroxyls in the gold-ceria catalysts. The isotopic tracing results further proved that the reaction between bridged surface -OH groups and CO molecules adsorbed on interfacial Au atoms contributes dominantly to the WGS reactivity. Thus, the abundant interfacial sites in gold clusters on the ceria surface induced superior reactivity compared to that of supported gold nanoparticles in catalyzing the WGS reaction. On the basis of direct and solid experimental evidence, we have obtained a very clear image of the surface reaction for the WGS reaction catalyzed by the gold-ceria catalyst.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31557]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Shandong Univ, Sch Chem & Chem Engn, Key Lab Special Aggregated Mat, Key Lab Colloid & Interface Chem, Jinan 250100, Shandong, Peoples R China; 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China; 3.Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Hunan, Peoples R China; 4.Peking Univ, PKU HKU Joint Lab Rare Earth Mat & Bioinorgan Che, State Key Lab Rare Earth Mat Chem & Applicat, Beijing Natl Lab Mol Sci, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Fu, XP,Gno, LW,Wang, WW,et al. Direct Identification of Active Surface Species for the Water-Gas Shift Reaction on a Gold-Ceria Catalyst[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2019,141(11):4613—4623.
APA	Fu, XP.,Gno, LW.,Wang, WW.,Ma, C.,Jia, CJ.,...&Yan, CH.(2019).Direct Identification of Active Surface Species for the Water-Gas Shift Reaction on a Gold-Ceria Catalyst.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,141(11),4613—4623.
MLA	Fu, XP,et al."Direct Identification of Active Surface Species for the Water-Gas Shift Reaction on a Gold-Ceria Catalyst".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 141.11(2019):4613—4623.