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题名:
The origin of palladium particle size effects in the direct synthesis of H2O2: Is smaller better?
作者: Tian, PF; Ouyang, L; Xu, XY; Ao, C; Xu, XC; Si, R; Shen, XJ; Lin, M; Xu, J; Han, YF
刊名: JOURNAL OF CATALYSIS
出版日期: 2017
卷号: 349, 页码:30-40
关键词: Size effects ; Subnano clusters ; Pd/HAp catalysts ; H2O2 synthesis ; Structure-performance relationship
DOI: 10.1016/j.jcat.2016.12.004
文章类型: 期刊论文
英文摘要: 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.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000401217600004
ISSN号: 0021-9517
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27479
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
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,2017-01-01,349:30-40.
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文件名: The origin of palladium particle size effects in the direct synthesis of H2O2_ Is smaller better_.pdf
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