CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Aggregation-Free Gold Nanoparticles in Ordered Mesoporous Carbons: Toward Highly Active and Stable Heterogeneous Catalysts
Wang, Shuai; Zhao, Qingfei; Wei, Huimin; Wang, Jian-Qiang(王建强); Cho, Minhyung; Cho, Hae Sung; Terasaki, Osamu; Wan, Ying
2013
Source PublicationJOURNAL OF THE AMERICAN CHEMICAL SOCIETY
ISSN0002-7863
Volume135Issue:32Pages:CONCATENATE(Sheet1!I26,-Sheet1!J26)
AbstractA coordination-assisted synthetic approach is reported here for the synthesis of highly active and stable gold nanoparticle catalysts in ordered mesoporous carbon materials using triblock copolymer F127 as a structure-directing agent, thiol-containing silane as a coordination agent, HAuCl4 as a gold source, and phenolic resin as a carbon source. Upon carbonization, the gold precursor becomes reduced to form monodispersed Au nanoparticles of ca. 9.0 nm, which are entrapped or confined by the "rigid" mesoporous carbonaceous framework. Nanoparticle aggregation is inhibited even at a high temperature of 600 degrees C. After removal of the silica component, the materials possess the ordered mesostructure, high surface area (similar to 1800 m(2)/g), large pore volume (similar to 1.19 cm(3)/g), and uniform bimodal mesopore size (<2.0 and 4.0 nm). The monodispersed gold nanoparticles are highly exposed because of the interpenetrated bimodal pores in the carbon framework, which exhibit excellent catalytic performance. A completely selective conversion of benzyl alcohol in water to benzoic acid can be achieved at 90 degrees C and 1 MPa oxygen. Benzyl alcohol can also be quantitatively converted to benzoic acid at 60 degrees C even under an atmospheric pressure, showing great advantages in green chemistry. The catalysts are stable, poison resistant, and reusable with little activity loss due to metal leaching. The silane coupling agent played several functions in this approach: (1) coordinating with gold species by the thiol group to benefit formation of monodispersed Au nanopartides; (2) reacting with phenolic resins by silanol groups to form relatively "rigid" composite framework; (3) pore-forming agent to generate secondary pores in carbon pore walls, which lead to higher surface area, larger pore volumes, and higher accessibility to to the gold nanopartides. Complete removal of the silica component proves to have little effect on the catalytic performance of entrapped Au nanoparticles.
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000323241200037
Citation statistics
Cited Times:149[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13666
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Wang, Shuai,Zhao, Qingfei,Wei, Huimin,et al. Aggregation-Free Gold Nanoparticles in Ordered Mesoporous Carbons: Toward Highly Active and Stable Heterogeneous Catalysts[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2013,135(32):CONCATENATE(Sheet1!I26,-Sheet1!J26).
APA Wang, Shuai.,Zhao, Qingfei.,Wei, Huimin.,Wang, Jian-Qiang.,Cho, Minhyung.,...&Wan, Ying.(2013).Aggregation-Free Gold Nanoparticles in Ordered Mesoporous Carbons: Toward Highly Active and Stable Heterogeneous Catalysts.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,135(32),CONCATENATE(Sheet1!I26,-Sheet1!J26).
MLA Wang, Shuai,et al."Aggregation-Free Gold Nanoparticles in Ordered Mesoporous Carbons: Toward Highly Active and Stable Heterogeneous Catalysts".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 135.32(2013):CONCATENATE(Sheet1!I26,-Sheet1!J26).
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