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Facile synthesis of Au embedded CuOx-CeO2 core/shell nanospheres as highly reactive and sinter-resistant catalysts for catalytic hydrogenation of p-nitrophenol
Wu, K; Wang, XY; Guo, LL; Xu, YJ; Zhou, L; Lyu, ZY; Liu, KY; Si, R; Zhang, YW; Sun, LD; Yan, CH
2020
Source PublicationNANO RESEARCH
ISSN1998-0124
Volume13Issue:8Pages:2044-2055
Subtype期刊论文
AbstractExploring cost-effective catalysts with high catalytic performance and long-term stability has always been a general concern for environment protection and energy conversion. Here, Au nanoparticles (NPs) embedded CuOx-CeO2 core/shell nanospheres (Au@CuOx-CeO2 CSNs) have been successfully prepared through a versatile one-pot method at ambient conditions. The spontaneous auto-redox reaction between HAuCl4 and Ce(OH)3 in aqueous solution triggered the self-assembly growth of micro-/ nanostructural Au@CuOx-CeO2 CSNs. Meanwhile, the CuOx clusters in Au@CuOx-CeO2 CSNs are capable of improving the anti-sintering ability of Au NPs and providing synergistic catalysis benefits. As a result, the confined Au NPs exhibited extraordinary thermal stability even at a harsh thermal condition up to 700 degrees C. In addition, before and after the severe calcination process, Au@CuOx-CeO2 CSNs can exhibit enhanced catalytic activity and excellent recyclability towards the hydrogenation of p-nitrophenol compared to previously reported nanocatalysts. The synergistic catalysis path between Au/CuOx/CeO2 triphasic interfaces was revealed by density functional theory (DFT) calculations. The CuOx clusters around the embedded Au NPs can provide moderate adsorption strength of p-nitrophenol, while the adjacent CeO2-supported Au NPs can facilitate the hydrogen dissociation to form H* species, which contributes to achieve the efficient reduction of p-nitrophenol. This study opens up new possibilities for developing high-efficient and sintering-resistant micro-/nanostructural nanocatalysts by exploiting multiphasic systems.
KeywordTOTAL-ENERGY CALCULATIONS GOLD NANOPARTICLES PLATINUM NANOPARTICLES CRYSTAL PLANE REDUCTION CERIA NANOCOMPOSITES CO 4-NITROPHENOL NANOCATALYST
DOI10.1007/s12274-020-2806-9
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/32883
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, PKU HKU Joint Lab Rare Earth Mat & Bioinorgan Che, Beijing 100871, Peoples R China
2.Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
4.Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China
Recommended Citation
GB/T 7714
Wu, K,Wang, XY,Guo, LL,et al. Facile synthesis of Au embedded CuOx-CeO2 core/shell nanospheres as highly reactive and sinter-resistant catalysts for catalytic hydrogenation of p-nitrophenol[J]. NANO RESEARCH,2020,13(8):2044-2055.
APA Wu, K.,Wang, XY.,Guo, LL.,Xu, YJ.,Zhou, L.,...&Yan, CH.(2020).Facile synthesis of Au embedded CuOx-CeO2 core/shell nanospheres as highly reactive and sinter-resistant catalysts for catalytic hydrogenation of p-nitrophenol.NANO RESEARCH,13(8),2044-2055.
MLA Wu, K,et al."Facile synthesis of Au embedded CuOx-CeO2 core/shell nanospheres as highly reactive and sinter-resistant catalysts for catalytic hydrogenation of p-nitrophenol".NANO RESEARCH 13.8(2020):2044-2055.
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