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Ultrafine platinum/iron oxide nanoconjugates confined in silica nanoshells for highly durable catalytic oxidation
Zhao, Hongyu; Wang, Dawei; Gao, Chuanbo; Liu, Hongyang; Han, Lu; Yin, Yadong; gaochuanbo@mail.xjtu.edu.cn; liuhy@imr.ac.cn; yadong.yin@ucr.edu
2016
发表期刊JOURNAL OF MATERIALS CHEMISTRY A
ISSN2050-7488
卷号4期号:4页码:1366-1372
摘要Noble metal/transition metal (hydr) oxide interfaces are often highly active catalytic sites for many oxidation reactions. One of the challenges in such catalyst systems especially in high-temperature reactions is the lack of an effective mechanism to stabilize the catalysts against sintering over time and to maintain the metal/oxide interfaces. Herein, we report an alloying-dealloying process for the production of ultrafine Pt/FeOx nanoconjugates (similar to 1.8 nm) with confinement in silica nanoshells for effective stabilization. The synthesis started with coating of ultrasmall Pt/Fe precursor nanoparticles in reverse micelles by a microporous silica shell, which served as a nanoreactor to allow the subsequent transformation of the precursor nanoparticles into the target Pt/FeOx nanoconjugates. Thanks to the ultrasmall size of the nanoconjugates and their effective protection by the silica shells, the resulting Pt/FeOx@SiO2 yolk/shell nanospheres showed high catalytic activity and remarkable durability in preferential CO oxidation in H-2 (PROX). This synthesis strategy may represent a general approach in rational design of highly stable catalysts with complex nanostructures for a broad range of catalysis.
部门归属[zhao, hongyu ; gao, chuanbo] xi an jiao tong univ, frontier inst sci & technol, ctr mat chem, xian 710054, shaanxi, peoples r china ; [wang, dawei ; yin, yadong] univ calif riverside, dept chem, riverside, ca 92521 usa ; [liu, hongyang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china ; [han, lu] shanghai jiao tong univ, sch chem & chem engn, shanghai 200240, peoples r china
资助者National Natural Science Foundation of China [21301138, 91545110, 21573254]; Fundamental Research Funds for the Central Universities [xjj2013033]; Center for Materials Chemistry from Xi'an Jiaotong University; Youth Innovation Promotion Association Chinese Academy of Sciences; U.S. Department of Energy, Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences, & Biosciences (CSGB) Division [DE-SC0002247]
收录类别sci
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/75232
专题中国科学院金属研究所
通讯作者gaochuanbo@mail.xjtu.edu.cn; liuhy@imr.ac.cn; yadong.yin@ucr.edu
推荐引用方式
GB/T 7714
Zhao, Hongyu,Wang, Dawei,Gao, Chuanbo,et al. Ultrafine platinum/iron oxide nanoconjugates confined in silica nanoshells for highly durable catalytic oxidation[J]. JOURNAL OF MATERIALS CHEMISTRY A,2016,4(4):1366-1372.
APA Zhao, Hongyu.,Wang, Dawei.,Gao, Chuanbo.,Liu, Hongyang.,Han, Lu.,...&yadong.yin@ucr.edu.(2016).Ultrafine platinum/iron oxide nanoconjugates confined in silica nanoshells for highly durable catalytic oxidation.JOURNAL OF MATERIALS CHEMISTRY A,4(4),1366-1372.
MLA Zhao, Hongyu,et al."Ultrafine platinum/iron oxide nanoconjugates confined in silica nanoshells for highly durable catalytic oxidation".JOURNAL OF MATERIALS CHEMISTRY A 4.4(2016):1366-1372.
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