Room-temperature Synthesis and Oxygen-reduction Catalytic Performance of Hollow ZnMn2O4 Nanospheres and Nanocubes

Chem. J. Chinese Universities ›› 2011, Vol. 32 ›› Issue (3): 595.

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Room-temperature Synthesis and Oxygen-reduction Catalytic Performance of Hollow ZnMn2O4 Nanospheres and Nanocubes

WANG Hong-Bo, CHENG Fang-Yi, TAO Zhan-Liang, LIANG Jing*, CHEN Jun

Key Laboratory of Advanced Energy Materials Chemistry, Ministry of Education, Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, China

Received:2010-10-22 Revised:2010-12-06 Online:2011-03-10 Published:2011-02-23
Contact: Jing LIANG E-mail:liangjing@nankai.edu.cn
Supported by:
国家自然科学基金(批准号: 20701021)、国家“九七三”计划项目(批准号: 2009CB220003)、教育部创新团队项目(批准号: IRT0927)、天津市应用基础及前沿技术研究项目(批准号: 08JCZDJC21300, 10SYSYJC27600)和中央高校基本科研业务费专项资金资助.

Abstract

Abstract: This paper reports on the room-temperature synthesis of ZnMn2O4 spinels. The formation of hollow ZnMn2O4 with nanospheres and nanocubes structures is accomplished by reduction of amorphous MnO2 precursors using NaBH4 in aqueous solution containing Zn2+. The structure, morphology, composition and surface properties of the as-prepared products are characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Brunauer-Emmett-Teller (BET) measurements. It is found that the size of as-prepared hollow ZnMn2O4 nanospheres and nanocubes is about 400?600 nm with wall thickness of 40nm, and that the walls of the hollow ZnMn2O4 nanostructures are densely aggregated by tiny particles with diameter of 5?6 nm. Furthermore, the activities of for oxygen reduction reaction (ORR) in alkaline media of the as-prepared hollow ZnMn2O4 nanospheres and nanocubes are also investigated. The experimental results show that the hollow ZnMn2O4 nanospheres exhibits better electrocatalysis performance with a high current density and an electron transferred number of 3.5, indicating their promising application as low-cost catalysts for ORR.

Key words: Room-temperature synthesis, Hollow nanostructures, ZnMn2O4, Oxygen reduction

CLC Number:

O611.4

TrendMD:

WANG Hong-Bo, CHENG Fang-Yi, TAO Zhan-Liang, LIANG Jing*, CHEN Jun. Room-temperature Synthesis and Oxygen-reduction Catalytic Performance of Hollow ZnMn2O4 Nanospheres and Nanocubes[J]. Chem. J. Chinese Universities, 2011, 32(3): 595.

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Room-temperature Synthesis and Oxygen-reduction Catalytic Performance of Hollow ZnMn2O4 Nanospheres and Nanocubes

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