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Small palladium isl...
Small palladium islands embedded in palladium-tungsten bimetallic nanoparticles form catalytic hotspots for oxygen reduction
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- Hu, Guangzhi (author)
- Umeå universitet,Institutionen för fysik,Umeå University
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- Nitze, Florian, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Gracia-Espino, Eduardo (author)
- Umeå universitet,Institutionen för fysik,Kemiska institutionen,Umeå University
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- Ma, Jingyuan (author)
- Chinese Academy of Sciences
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- Barzegar, Hamid Reza (author)
- Umeå universitet,Institutionen för fysik,Umeå University
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- Sharifi, Tiva (author)
- Umeå universitet,Institutionen för fysik,Umeå University
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- Jia, Xueen (author)
- Umeå universitet,Umeå University
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- Shchukarev, Andrey (author)
- Umeå universitet,Kemiska institutionen,Technical Chemistry,Umeå University
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- Lu, Lu (author)
- Xi'an Jiaotong University
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- Ma, Chuansheng (author)
- Xi'an Jiaotong University
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- Yang, Guang (author)
- Xi'an Jiaotong University
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- Wågberg, Thomas (author)
- Umeå universitet,Institutionen för fysik,Umeå University
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(creator_code:org_t)
- 2014-10-13
- 2014
- English.
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In: Nature Communications. - : Macmillan Publishers Ltd.. - 2041-1723. ; 5, s. Article number: 5253-
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Abstract
Subject headings
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- The sluggish kinetics of the oxygen reduction reaction at the cathode side of proton exchange membrane fuel cells is one major technical challenge for realizing sustainable solutions for the transportation sector. Finding efficient yet cheap electrocatalysts to speed up this reaction therefore motivates researchers all over the world. Here we demonstrate an efficient synthesis of palladium-tungsten bimetallic nanoparticles supported on ordered mesoporous carbon. Despite a very low percentage of noble metal (palladium: tungsten = 1:8), the hybrid catalyst material exhibits a performance equal to commercial 60% platinum/Vulcan for the oxygen reduction process. The high catalytic efficiency is explained by the formation of small palladium islands embedded at the surface of the palladium-tungsten bimetallic nanoparticles, generating catalytic hotspots. The palladium islands are similar to 1 nm in diameter, and contain 10-20 palladium atoms that are segregated at the surface. Our results may provide insight into the formation, stabilization and performance of bimetallic nanoparticles for catalytic reactions.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Annan teknik -- Övrig annan teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies -- Other Engineering and Technologies not elsewhere specified (hsv//eng)
Keyword
- chemical sciences
- catalysis
- materials science
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Hu, Guangzhi
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Nitze, Florian, ...
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Gracia-Espino, E ...
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Ma, Jingyuan
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Barzegar, Hamid ...
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Sharifi, Tiva
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show more...
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Jia, Xueen
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Shchukarev, Andr ...
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Lu, Lu
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Ma, Chuansheng
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Yang, Guang
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Wågberg, Thomas
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Other Engineerin ...
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and Other Engineerin ...
- Articles in the publication
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Nature Communica ...
- By the university
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Umeå University
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Chalmers University of Technology