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Traditional earth-a...
Traditional earth-abundant coal as new energy materials to catalyze the oxygen reduction reaction in alkaline solution
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- Chen, X. X. (författare)
- University of Science and Technology Liaoning
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- Huang, X. N. (författare)
- University of Science and Technology Liaoning
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- Wang, T. (författare)
- Xinjiang University
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- Barwe, S. (författare)
- Ruhr-Universität Bochum
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- Xie, Kunpeng, 1985 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Kayran, Y. U. (författare)
- Ruhr-Universität Bochum
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- Wintrich, D. (författare)
- Ruhr-Universität Bochum
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- Schuhmann, W. (författare)
- Ruhr-Universität Bochum
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- Masa, J. (författare)
- Ruhr-Universität Bochum
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(creator_code:org_t)
- Elsevier BV, 2016
- 2016
- Engelska.
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Ingår i: Electrochimica Acta. - : Elsevier BV. - 0013-4686. ; 211, s. 568-575
- Relaterad länk:
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http://dx.doi.org/10...
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- Coal is an earth-abundant energy resource, however, its direct combustion results in serious environmental pollution. Therefore, it becomes important to design value-added products from coal and to maximize its value chain. Herein, brown coal was used to develop non-precious metal catalysts for the oxygen reduction reaction (ORR) in fuel cells as green energy conversion systems. The brown coal was first pretreated with different acids, followed by N-doping at 800 degrees C in a stream of NH3. A trace amount of Fe was further added to improve the electrocatalytic performance of the prepared catalyst towards ORR. The prepared coal-derived N-doped carbon further modified with 0.5% Fe exhibited onset potential of 0.92 V vs. RHE at a current density of -0.1 mA cm(-2) and a predominantly 4-electron transfer pathway of oxygen to water in 0.1 M NaOH, which was evaluated by RDE and RRDE. The prepared electrocatalysts were further characterized by elemental analysis, XRD, Raman and XPS. The results suggest that the coal-derived ORR catalyst have convoluted graphitic and amorphous carbon structures. The N-content increased after acid-pretreatment and subsequent functionalization with nitrogen, while it slightly decreased after Fe incorporation apparently due to coordination of Fe with N. ORR activity enhancement after the incorporation of Fe is expected to mainly arise from a synergetic effect involving the interaction of Fe with N groups distributed in the carbon matrix. (C) 2016 Elsevier Ltd. All rights reserved.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
Nyckelord
- N-doping
- fe
- nitrogen
- ash components
- metal-free catalysts
- oxygen reduction reaction
- sensitized solar-cells
- coal
- electrolyte fuel-cell
- Electrochemistry
- fuel cells
- iron
- carbon-black
- xrd analysis
- carbon materials
- n-c electrocatalysts
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Chen, X. X.
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Huang, X. N.
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Wang, T.
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Barwe, S.
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Xie, Kunpeng, 19 ...
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Kayran, Y. U.
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visa fler...
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Wintrich, D.
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Schuhmann, W.
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Masa, J.
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visa färre...
- Om ämnet
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Kemiteknik
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och Kemiska processe ...
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- TEKNIK OCH TEKNOLOGIER
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TEKNIK OCH TEKNO ...
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och Kemiteknik
- Artiklar i publikationen
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Electrochimica A ...
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Chalmers tekniska högskola