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Stability of Ceria Supports in Pt-CeOx/C Catalysts
Ou, Ding Rong1,2; Mori, Toshiyuki2; Fugane, Keisuke2,3; Togasaki, Hirotaka2,4; Ye, Fei5; Drennan, John6
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
2011-10-06
DOI10.1021/jp205640k
Volume115Issue:39Pages:19239-19245
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordENERGY-LOSS SPECTROSCOPY ; METHANOL FUEL-CELL ; OXIDE NANOPARTICLES ; CO OXIDATION ; PLATINUM ; ELECTROOXIDATION ; ELECTROCATALYST ; INTERFACE ; CARBON ; BLACK
AbstractPt-CeOx/C (1.5 <= x <= 2) catalysts are promising electrode materials in polymer electrolyte membrane fuel cells (PEMFCs), especially in direct methanol fuel cells. In this study, the chemical and microstructural features of the catalysts before and after electrocatalytic reactions were compared, and then the stability of ceria supports in the catalysts was studied. It was found that, during the impregnation of Pt on ceria, Pt particles will invade into the ceria supports and the ceria will be partly reduced. Subsequently, in an acidic condition that is required in a fuel cell using an Before reactions acid-based polymer electrolyte, the cent supports were instable and easily dissolved into the sulfuric acid solution. As a result, only a small amount of ceria remains around/between the Pt particles. The experimental result suggested that the dissolution of ceria could be due to the partial reduction of the ceria supports in the as-prepared catalysts. Although only a small amount of ceria could remain in the catalysts, it can effectively prevent the growth and sintering of Pt particles and contribute to the CO tolerance and higher catalytic activities of the Pt-CeOx/C catalysts.
Language英语
WOS IDWOS:000295245500042
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/142572
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Lab Fuel Cells, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Natl Inst Mat Sci, Innovat Ctr Nanomat Sci Environm & Energy, Tsukuba, Ibaraki 3050044, Japan
3.Hokkaido Univ, Grad Sch Chem Sci & Engn, Kita Ku, Sapporo, Hokkaido 0608628, Japan
4.Hokkaido Univ, Dept Chem, Grad Sch Sci, Kita Ku, Sapporo, Hokkaido 0608628, Japan
5.Dalian Univ Technol, Key Lab Mat Modificat, Sch Mat Sci & Engn, Dalian 116024, Liaoning, Peoples R China
6.Univ Queensland, Ctr Microscopy & Microanal, St Lucia, Qld 4072, Australia
Recommended Citation
GB/T 7714
Ou, Ding Rong,Mori, Toshiyuki,Fugane, Keisuke,et al. Stability of Ceria Supports in Pt-CeOx/C Catalysts[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2011,115(39):19239-19245.
APA Ou, Ding Rong,Mori, Toshiyuki,Fugane, Keisuke,Togasaki, Hirotaka,Ye, Fei,&Drennan, John.(2011).Stability of Ceria Supports in Pt-CeOx/C Catalysts.JOURNAL OF PHYSICAL CHEMISTRY C,115(39),19239-19245.
MLA Ou, Ding Rong,et al."Stability of Ceria Supports in Pt-CeOx/C Catalysts".JOURNAL OF PHYSICAL CHEMISTRY C 115.39(2011):19239-19245.
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