The origin of palladium particle size effects in the direct synthesis of H2O2: Is smaller better?

doi:10.1016/j.jcat.2016.12.004

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	The origin of palladium particle size effects in the direct synthesis of H2O2: Is smaller better?
	Tian, PF; Ouyang, L; Xu, XY; Ao, C; Xu, XC; Si, R; Shen, XJ; Lin, M; Xu, J; Han, YF
	2017
发表期刊	JOURNAL OF CATALYSIS
ISSN	0021-9517
卷号	349 页码:30-40
文章类型	期刊论文
摘要	A series of size-controlled Pd/hydroxyapatite (HAp) catalysts ranging from single sites (Pd clusters) to nanoparticles (dpd: similar to 30 nm) was prepared and examined for the H2O2 synthesis directly from H-2 and O-2. A Pd/HAp (dpd: similar to 1.4 nm) showed a high selectivity of 94% toward H2O2 under mild conditions (283 K and atmospheric pressure). The crystal phase, morphology, surface electronic states and coordination number of Pd particles from atomic level to nano scale were characterized in detail using multiple techniques such as X-ray diffraction, scanning transmission electron microscopy, and extended X-ray absorption fine structure. Density functional theory calculations indicated that Pd clusters of subnano size have the most effective active sites for the selective activation of oxygen hydrogenation, thus resulting in high catalytic efficiency for H2O2 synthesis. This work elucidates why those smaller Pd particles in a proper size range show the best catalytic performance for H2O2 synthesis. (C) 2016 Elsevier Inc. All rights reserved.
关键词	Size Effects Subnano Clusters Pd/hap Catalysts H2o2 Synthesis Structure-performance Relationship
DOI	10.1016/j.jcat.2016.12.004
收录类别	SCI
语种	英语
WOS记录号	WOS:000401217600004
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/27479
专题	中科院上海应用物理研究所2011-2018年
推荐引用方式 GB/T 7714	Tian, PF,Ouyang, L,Xu, XY,et al. The origin of palladium particle size effects in the direct synthesis of H2O2: Is smaller better?[J]. JOURNAL OF CATALYSIS,2017,349:30-40.
APA	Tian, PF.,Ouyang, L.,Xu, XY.,Ao, C.,Xu, XC.,...&Han, YF.(2017).The origin of palladium particle size effects in the direct synthesis of H2O2: Is smaller better?.JOURNAL OF CATALYSIS,349,30-40.
MLA	Tian, PF,et al."The origin of palladium particle size effects in the direct synthesis of H2O2: Is smaller better?".JOURNAL OF CATALYSIS 349(2017):30-40.

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