Metal-organic framework derived hybrid co3O4-Carbon porous nanowire arrays as reversible oxygen evolution electrodes

Ma, Tian Yi, Dai, Sheng, Jaroniec, Mietek and Qiao, Shi Zhang (2014) Metal-organic framework derived hybrid co3O4-Carbon porous nanowire arrays as reversible oxygen evolution electrodes. Journal of the American Chemical Society, 136 39: 13925-13931. doi:10.1021/ja5082553


Author Ma, Tian Yi
Dai, Sheng
Jaroniec, Mietek
Qiao, Shi Zhang
Title Metal-organic framework derived hybrid co3O4-Carbon porous nanowire arrays as reversible oxygen evolution electrodes
Journal name Journal of the American Chemical Society   Check publisher's open access policy
ISSN 0002-7863
1520-5126
Publication date 2014-10-01
Year available 2014
Sub-type Article (original research)
DOI 10.1021/ja5082553
Open Access Status Not yet assessed
Volume 136
Issue 39
Start page 13925
End page 13931
Total pages 7
Place of publication Washington, DC United States
Publisher American Chemical Society
Language eng
Abstract Hybrid porous nanowire arrays composed of strongly interacting Co3O4 and carbon were prepared by a facile carbonization of the metal-organic framework grown on Cu foil. The resulting material, possessing a high surface area of 251 m(2) g(-1) and a large carbon content of 52.1 wt %, can be directly used as the working electrode for oxygen evolution reaction without employing extra substrates or binders. This novel oxygen evolution electrode can smoothly operate in alkaline solutions (e.g., 0.1 and 1.0 M KOH), affording a low onset potential of 1.47 V (vs reversible hydrogen electrode) and a stable current density of 10.0 mA cm(-2) at 1.52 V in 0.1 M KOH solution for at least 30 h, associated with a high Faradaic efficiency of 99.3%. The achieved ultrahigh oxygen evolution activity and strong durability, with superior performance in comparison to the state-of-the-art noble-metal/transition-metal and nonmetal catalysts, originate from the unique nanowire array electrode configuration and in situ carbon incorporation, which lead to the large active surface area, enhanced mass/charge transport capability, easy release of oxygen gas bubbles, and strong structural stability. Furthermore, the hybrid Co3O4-carbon porous nanowire arrays can also efficiently catalyze oxygen reduction reaction, featuring a desirable four electron pathway for reversible oxygen evolution and reduction, which is potentially useful for rechargeable metal-air batteries, regenerative fuel cells, and other important clean energy devices.
Formatted abstract
Hybrid porous nanowire arrays composed of strongly interacting Co3O4 and carbon were prepared by a facile carbonization of the metal–organic framework grown on Cu foil. The resulting material, possessing a high surface area of 251 m2 g–1 and a large carbon content of 52.1 wt %, can be directly used as the working electrode for oxygen evolution reaction without employing extra substrates or binders. This novel oxygen evolution electrode can smoothly operate in alkaline solutions (e.g., 0.1 and 1.0 M KOH), affording a low onset potential of 1.47 V (vs reversible hydrogen electrode) and a stable current density of 10.0 mA cm–2 at 1.52 V in 0.1 M KOH solution for at least 30 h, associated with a high Faradaic efficiency of 99.3%. The achieved ultrahigh oxygen evolution activity and strong durability, with superior performance in comparison to the state-of-the-art noble-metal/transition-metal and nonmetal catalysts, originate from the unique nanowire array electrode configuration and in situ carbon incorporation, which lead to the large active surface area, enhanced mass/charge transport capability, easy release of oxygen gas bubbles, and strong structural stability. Furthermore, the hybrid Co3O4-carbon porous nanowire arrays can also efficiently catalyze oxygen reduction reaction, featuring a desirable four-electron pathway for reversible oxygen evolution and reduction, which is potentially useful for rechargeable metal–air batteries, regenerative fuel cells, and other important clean energy devices.
Keyword Chemistry, Multidisciplinary
Chemistry
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID DP140104062
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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