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Single Crystal (Mn,Co)(3)O-4 Octahedra for Highly Efficient Oxygen Reduction Reactions
Liu, Huanying1; Zhu, Xuefeng1; Li, Mingrun1; Tang, Qiwen2; Sun, Gongquan2; Yang, Weishen1
KeywordOrr Selectivity Facet-determined Catalysis Single-crystal Octahedron Spinel Oxides (Mn Co)(3)O-4
Source PublicationELECTROCHIMICA ACTA
2014-10-20
DOI10.1016/j.electacta.2014.08.087
Volume144Pages:31-41
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectElectrochemistry
WOS Research AreaElectrochemistry
WOS KeywordNITROGEN-DOPED CARBON ; 0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1 SPINEL FILMS ; RAY PHOTOELECTRON-SPECTROSCOPY ; CO-O NANOCRYSTALS ; MANGANESE OXIDES ; SPRAY-PYROLYSIS ; ALKALINE MEDIA ; FUEL-CELLS ; ELECTROCATALYTIC ACTIVITY ; HYDROGEN-PEROXIDE
AbstractSingle-crystal (Mn,Co)(3)O-4 octahedra were synthesized through a novel precipitation-aging method. Well-defined single-crystal octahedra can be formed by carefully controlling the precipitation-dissolution equilibrium, oxygen concentration, and solution temperature during synthesis to match the rates of spinel nucleation and octahedra growth. The single-crystal (Mn,Co)(3)O-4 octahedra expose {111} and {011} facets of cubic and tetragonal phases, respectively, depending on the Mn/Co ratio. However, only single-crystal octahedra of Mn2CoO4 and Mn2.5Co0.5O4 with exposed {011} facets show the highest selectivity towards 4e(-) and 2e(-) oxygen reduction reactions (ORR) in alkaline solution, respectively. Furthermore, the single-crystal Mn2CoO4 octahedra with exposed {011} facets shows similar to 30 times higher area specific activity for ORR than that of nanoparticles with random/mixed facets. The high electrocatalytic activity and selectivity towards ORR are correlated with the octahedral shape, the exposed facet, and the ratio of cations on the exposed facets (especially the octahedrally coordinated Mn-4 cations). This facet dependent catalytic performance provides a new route for obtaining highly selective and active ORR electrocatalysts. (C) 2014 Elsevier Ltd. All rights reserved.
Language英语
WOS IDWOS:000343951100005
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/145613
Collection中国科学院大连化学物理研究所
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Direct Alcohol Fuel Cell Lab, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Liu, Huanying,Zhu, Xuefeng,Li, Mingrun,et al. Single Crystal (Mn,Co)(3)O-4 Octahedra for Highly Efficient Oxygen Reduction Reactions[J]. ELECTROCHIMICA ACTA,2014,144:31-41.
APA Liu, Huanying,Zhu, Xuefeng,Li, Mingrun,Tang, Qiwen,Sun, Gongquan,&Yang, Weishen.(2014).Single Crystal (Mn,Co)(3)O-4 Octahedra for Highly Efficient Oxygen Reduction Reactions.ELECTROCHIMICA ACTA,144,31-41.
MLA Liu, Huanying,et al."Single Crystal (Mn,Co)(3)O-4 Octahedra for Highly Efficient Oxygen Reduction Reactions".ELECTROCHIMICA ACTA 144(2014):31-41.
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