Carbon nanocapsules as an electrocatalyst support for the oxygen reduction reaction in alkaline electrolyte

Y. M. Lin; Y. M. Chang; Pu-Wei Wu; P. Lin; Y. Y. Li; C. Y. Wu; C. F. Tsai; K. Y. Yeh

doi:10.1007/s10800-007-9465-3

Carbon nanocapsules as an electrocatalyst support for the oxygen reduction reaction in alkaline electrolyte

Y. M. Lin, Y. M. Chang, Pu-Wei Wu, P. Lin, Y. Y. Li, C. Y. Wu, C. F. Tsai, K. Y. Yeh

材料科學與工程學系

研究成果: Article › 同行評審

10 引文斯高帕斯（Scopus）

摘要

Carbon Nanocapsules (CNCs) were investigated for their electrocatalytic performances for the oxygen reduction reaction in alkaline electrolyte. With an average diameter of 10-30 nm, the CNCs are composed of graphene layers encapsulating a hollow core. A gas diffusion electrode (GDE) made of CNCs revealed a much enhanced i-V polarization response than that of Vulcan XC72. However, its performance was moderately lower than that of Black Pearls 2000. In addition, the CNCs were impregnated with nanoparticles of Ag, MnO _x and CoO _x . The i-V and galvanostatic results of the catalyzed CNCs indicated significant improvements over that of noncatalyzed CNCs. For example, a Ag-CNC derived GDE was capable of delivering 1.03 and 0.88 V at current densities of 100 and 200 mA cm^-2, respectively. Our study offers direct evidence that the CNCs not only exhibit unique electrocatalytic abilities but also function superbly as an electrocatalyst support.

原文	English
頁（從 - 到）	507-514
頁數	8
期刊	Journal of Applied Electrochemistry
卷	38
發行號	4
DOIs	https://doi.org/10.1007/s10800-007-9465-3
出版狀態	Published - 1 四月 2008

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10.1007/s10800-007-9465-3

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abstract = "Carbon Nanocapsules (CNCs) were investigated for their electrocatalytic performances for the oxygen reduction reaction in alkaline electrolyte. With an average diameter of 10-30 nm, the CNCs are composed of graphene layers encapsulating a hollow core. A gas diffusion electrode (GDE) made of CNCs revealed a much enhanced i-V polarization response than that of Vulcan XC72. However, its performance was moderately lower than that of Black Pearls 2000. In addition, the CNCs were impregnated with nanoparticles of Ag, MnO x and CoO x . The i-V and galvanostatic results of the catalyzed CNCs indicated significant improvements over that of noncatalyzed CNCs. For example, a Ag-CNC derived GDE was capable of delivering 1.03 and 0.88 V at current densities of 100 and 200 mA cm-2, respectively. Our study offers direct evidence that the CNCs not only exhibit unique electrocatalytic abilities but also function superbly as an electrocatalyst support.",

keywords = "Alkaline fuel cell, Carbon nanocapsules, Electrocatalyst, Gas diffusion electrode, Oxygen reduction reaction",

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AU - Lin, Y. M.

AU - Chang, Y. M.

AU - Wu, Pu-Wei

AU - Lin, P.

AU - Li, Y. Y.

AU - Wu, C. Y.

AU - Tsai, C. F.

AU - Yeh, K. Y.

PY - 2008/4/1

Y1 - 2008/4/1

N2 - Carbon Nanocapsules (CNCs) were investigated for their electrocatalytic performances for the oxygen reduction reaction in alkaline electrolyte. With an average diameter of 10-30 nm, the CNCs are composed of graphene layers encapsulating a hollow core. A gas diffusion electrode (GDE) made of CNCs revealed a much enhanced i-V polarization response than that of Vulcan XC72. However, its performance was moderately lower than that of Black Pearls 2000. In addition, the CNCs were impregnated with nanoparticles of Ag, MnO x and CoO x . The i-V and galvanostatic results of the catalyzed CNCs indicated significant improvements over that of noncatalyzed CNCs. For example, a Ag-CNC derived GDE was capable of delivering 1.03 and 0.88 V at current densities of 100 and 200 mA cm-2, respectively. Our study offers direct evidence that the CNCs not only exhibit unique electrocatalytic abilities but also function superbly as an electrocatalyst support.

AB - Carbon Nanocapsules (CNCs) were investigated for their electrocatalytic performances for the oxygen reduction reaction in alkaline electrolyte. With an average diameter of 10-30 nm, the CNCs are composed of graphene layers encapsulating a hollow core. A gas diffusion electrode (GDE) made of CNCs revealed a much enhanced i-V polarization response than that of Vulcan XC72. However, its performance was moderately lower than that of Black Pearls 2000. In addition, the CNCs were impregnated with nanoparticles of Ag, MnO x and CoO x . The i-V and galvanostatic results of the catalyzed CNCs indicated significant improvements over that of noncatalyzed CNCs. For example, a Ag-CNC derived GDE was capable of delivering 1.03 and 0.88 V at current densities of 100 and 200 mA cm-2, respectively. Our study offers direct evidence that the CNCs not only exhibit unique electrocatalytic abilities but also function superbly as an electrocatalyst support.

KW - Alkaline fuel cell

KW - Carbon nanocapsules

KW - Electrocatalyst

KW - Gas diffusion electrode

KW - Oxygen reduction reaction

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