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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
关键词Orr Selectivity Facet-determined Catalysis Single-crystal Octahedron Spinel Oxides (Mn Co)(3)O-4
刊名ELECTROCHIMICA ACTA
2014-10-20
DOI10.1016/j.electacta.2014.08.087
144页:31-41
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Electrochemistry
研究领域[WOS]Electrochemistry
关键词[WOS]NITROGEN-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
英文摘要Single-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.
语种英语
WOS记录号WOS:000343951100005
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/145613
专题中国科学院大连化学物理研究所
作者单位1.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
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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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