Efficiency of bimetallic PtPd on polydopamine modified on various carbon supports for alcohol oxidations

© 2016 In this work, the preparation, characterization, and electrocatalytic analysis of the catalysts on various carbon substrates for direct alcohol fuel cells were studied. Selected carbons were modified with/without polydopamine (labelled as PDA-C and C) and further metal electrodeposited incorp...

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Main Authors: Pinithchaisakula A., Ounnunkad K., Themsirimongkon S., Promsawan N., Waenkaew P., Saipanya S.
Format: Journal
Published: 2017
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/40752
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spelling th-cmuir.6653943832-407522017-09-28T04:11:13Z Efficiency of bimetallic PtPd on polydopamine modified on various carbon supports for alcohol oxidations Pinithchaisakula A. Ounnunkad K. Themsirimongkon S. Promsawan N. Waenkaew P. Saipanya S. © 2016 In this work, the preparation, characterization, and electrocatalytic analysis of the catalysts on various carbon substrates for direct alcohol fuel cells were studied. Selected carbons were modified with/without polydopamine (labelled as PDA-C and C) and further metal electrodeposited incorporated onto the glassy carbon (labelled as 5Pt1Pd/PDA-C and 5Pt1Pd/C). Four various carbon materials were used e.g. graphite (G), carbon nanotube (CNT), graphene (GP) and graphene oxide (GO) and the carbons were modified with PDA denoted as PDA-G, PDA-CNT, PDA-GP and PDA-GO, respectively. The transmission electron microscopy (TEM) and scanning electron microscopy (SEM) experimental observation showed narrow size distribution of metal anchored on the PDA-C and C materials. Chemical compositions and oxidation states of the catalysts were determined by X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDX). The catalytic performances for small organic electro-oxidation (e.g. methanol and ethanol) were measured by cyclic voltammetry (CV). Among different PDA-C and C catalysts, monometallic Pt showed less activity than the bimetallic catalysts. Among catalysts with PDA, the 5Pt1Pd/PDA-GO catalyst facilitated methanol and ethanol oxidations with high oxidation currents and If/Ib value and stability with low potentials while among catalysts without PDA, the 5Pt1Pd/CNT provides highest activity and stability. It was found that the catalysts with PDA provided high activity and stability than the catalysts without PDA. The improved catalytic performance of the prepared catalysts could be related to the higher active surface area from polymer modification and bimetallic catalyst system in the catalyst composites. 2017-09-28T04:11:13Z 2017-09-28T04:11:13Z Journal 03010104 2-s2.0-84997207060 10.1016/j.chemphys.2016.11.010 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84997207060&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/40752
institution Chiang Mai University
building Chiang Mai University Library
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description © 2016 In this work, the preparation, characterization, and electrocatalytic analysis of the catalysts on various carbon substrates for direct alcohol fuel cells were studied. Selected carbons were modified with/without polydopamine (labelled as PDA-C and C) and further metal electrodeposited incorporated onto the glassy carbon (labelled as 5Pt1Pd/PDA-C and 5Pt1Pd/C). Four various carbon materials were used e.g. graphite (G), carbon nanotube (CNT), graphene (GP) and graphene oxide (GO) and the carbons were modified with PDA denoted as PDA-G, PDA-CNT, PDA-GP and PDA-GO, respectively. The transmission electron microscopy (TEM) and scanning electron microscopy (SEM) experimental observation showed narrow size distribution of metal anchored on the PDA-C and C materials. Chemical compositions and oxidation states of the catalysts were determined by X-ray photoelectron spectroscopy (XPS) and energy-dispersive X-ray spectroscopy (EDX). The catalytic performances for small organic electro-oxidation (e.g. methanol and ethanol) were measured by cyclic voltammetry (CV). Among different PDA-C and C catalysts, monometallic Pt showed less activity than the bimetallic catalysts. Among catalysts with PDA, the 5Pt1Pd/PDA-GO catalyst facilitated methanol and ethanol oxidations with high oxidation currents and If/Ib value and stability with low potentials while among catalysts without PDA, the 5Pt1Pd/CNT provides highest activity and stability. It was found that the catalysts with PDA provided high activity and stability than the catalysts without PDA. The improved catalytic performance of the prepared catalysts could be related to the higher active surface area from polymer modification and bimetallic catalyst system in the catalyst composites.
format Journal
author Pinithchaisakula A.
Ounnunkad K.
Themsirimongkon S.
Promsawan N.
Waenkaew P.
Saipanya S.
spellingShingle Pinithchaisakula A.
Ounnunkad K.
Themsirimongkon S.
Promsawan N.
Waenkaew P.
Saipanya S.
Efficiency of bimetallic PtPd on polydopamine modified on various carbon supports for alcohol oxidations
author_facet Pinithchaisakula A.
Ounnunkad K.
Themsirimongkon S.
Promsawan N.
Waenkaew P.
Saipanya S.
author_sort Pinithchaisakula A.
title Efficiency of bimetallic PtPd on polydopamine modified on various carbon supports for alcohol oxidations
title_short Efficiency of bimetallic PtPd on polydopamine modified on various carbon supports for alcohol oxidations
title_full Efficiency of bimetallic PtPd on polydopamine modified on various carbon supports for alcohol oxidations
title_fullStr Efficiency of bimetallic PtPd on polydopamine modified on various carbon supports for alcohol oxidations
title_full_unstemmed Efficiency of bimetallic PtPd on polydopamine modified on various carbon supports for alcohol oxidations
title_sort efficiency of bimetallic ptpd on polydopamine modified on various carbon supports for alcohol oxidations
publishDate 2017
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84997207060&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/40752
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