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Oxidatively Induced...
Oxidatively Induced Exposure of Active Surface Area during Microwave Assisted Formation of Pt3Co Nanoparticles for Oxygen Reduction Reaction
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- Sandström, Robin (author)
- Umeå universitet,Institutionen för fysik
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- Ekspong, Joakim (author)
- Umeå universitet,Institutionen för fysik
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- Gracia-Espino, Eduardo (author)
- Umeå universitet,Institutionen för fysik
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- Wågberg, Thomas, 1971- (author)
- Umeå universitet,Institutionen för fysik
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(creator_code:org_t)
- 2019
- 2019
- English.
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In: RSC Advances. - : Royal Society of Chemistry. - 2046-2069. ; 9:31, s. 17979-17987
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Abstract
Subject headings
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- The oxygen reduction reaction (ORR), the rate-limiting reaction in proton exchange membrane fuel cells, can efficiently be facilitated by properly manufactured platinum catalysts alloyed with late 3d transition metals. Herein we synthesize a platinum:cobalt nanoparticulate catalyst with a 3:1 atomic ratio by reduction of a dry organometallic precursor blend within a commercial household microwave oven. The formed nanoparticles are simultaneously anchored to a carbon black support that enables large Pt surface area. Two separate microwave treatment steps were employed, where step one constitutes a fast oxidative treatment for revealing active surface area while a reductive secondary annealing treatment promotes a Pt rich surface. The resulting Pt3Co/C catalyst (~3.4 nm) demonstrate an enhanced ORR activity directly attributed to incorporated Co with a specific and mass activity of 704 μA cm-2Pt and 352 A g-1Pt corresponding to an increase by 279 % and 66 % respectively compared to a commercial Pt/C (~1.8 nm) catalyst measured under identical conditions. The method´s simplicity, scalability and novelty is expected to further assist in Pt-Co development and bring the catalyst one step closer toward commercialization and utility in fuel cells.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- Proton exchange membrane fuel cell
- platinum cobalt
- Oxygen reduction reaction
- Microwave synthesis
- nanomaterials
- nanomaterial
- nanopartiklar
- nanoparticles
- Materials Science
- materialvetenskap
Publication and Content Type
- ref (subject category)
- art (subject category)
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