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In-situ fabrication of noble metal modified (Ce, Zr)O2-delta monolithic catalysts for CO oxidation
Liu, Xiaoyuan; Wang, Ke; Zhou, Yang; Tang, Xinyue; Zhu, Xiuhui; Zhang, Ruishi; Zhang, Xinglai; Jiang, Xin; Liu, Baodan
2019-07-31
Source PublicationAPPLIED SURFACE SCIENCE
ISSN0169-4332
Volume483Pages:721-729
AbstractThe CeO2-ZrO2 solid solution ((Ce, Zr)O-2) has long been utilized in catalytic industry due to its enhanced oxygen storage/release capacity (OSC/ORC) and outstanding thermal stability. In this study, (Ce, Zr)O2-delta monolithic catalysts are successfully in-situ fabricated on flexible titanium mesh through traditional plasma electrolytic oxidation (PEO) method. The surface Ce, Zr atomic percentages (at.%) of the as-prepared catalysts can be widely tailored through the change of the mass ratio of Ce-2(SO4)(3) and Zr(SO4)(2) in the initial electrolyte during PEO process. XRD test in accompany with Raman study reveals the existence of cubic CeO2, stable/metastable tetragonal phases (t, t' phases) and Ce, Zr containing amorphous phase in the catalysts. XPS analysis shows the nonstoichiometric feature of the as-prepared monolithic catalysts while the TEM characterization indicates the nanocrystalline nature of the (Ce, Zr)O2-delta catalysts. After noble metal (Au, PdO) modification, the monolithic catalysts show remarkable CO oxidation activities. The PdO/Ce75Zr25 sample shows the best catalytic activity with a lowest CO oxidation temperature of 135 degrees C. This study establishes an efficient in-situ fabrication strategy toward the preparation of CeO2-ZrO2 solid solution on flexible valve metal substrates with good substrate adherence, which is advantageous and promising for the direct integration of various oxide catalysts toward CO oxidation, TWCs, SCR, etc.
KeywordCeO2-ZrO2 solid solution Plasma electrolytic oxidation In-situ growth Monolithic catalysts Noble metal modification
Indexed BySCI
Language英语
WOS IDWOS:000471105000080
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80889
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Liu, Xiaoyuan,Wang, Ke,Zhou, Yang,et al. In-situ fabrication of noble metal modified (Ce, Zr)O2-delta monolithic catalysts for CO oxidation[J]. APPLIED SURFACE SCIENCE,2019,483:721-729.
APA Liu, Xiaoyuan.,Wang, Ke.,Zhou, Yang.,Tang, Xinyue.,Zhu, Xiuhui.,...&Liu, Baodan.(2019).In-situ fabrication of noble metal modified (Ce, Zr)O2-delta monolithic catalysts for CO oxidation.APPLIED SURFACE SCIENCE,483,721-729.
MLA Liu, Xiaoyuan,et al."In-situ fabrication of noble metal modified (Ce, Zr)O2-delta monolithic catalysts for CO oxidation".APPLIED SURFACE SCIENCE 483(2019):721-729.
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