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
ISSN0021-9517
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
DOI10.1016/j.jcat.2016.12.004
收录类别SCI
语种英语
WOS记录号WOS:000401217600004
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
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
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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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