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Organic-inorganic hybrid PtCo nanoparticle with high electrocatalytic activity and durability for oxygen reduction

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dc.contributor.author Jung, Namgee
dc.contributor.author Bhattacharjee, Satadeep
dc.contributor.author Gautam, Sanjeev
dc.contributor.author Park, Hee-Young
dc.contributor.author Ryu, Jaeyune
dc.contributor.author Chung, Young-Hoon
dc.contributor.author Lee, Sang-Young
dc.contributor.author Jang, Injoon
dc.contributor.author Jang, Jong Hyun
dc.contributor.author Park, Sae Hum
dc.contributor.author Chung, Dong Young
dc.contributor.author Sung, Yung-Eun
dc.contributor.author Chae, Keun-Hwa
dc.contributor.author Waghmare, Umesh V.
dc.contributor.author Lee, Seung-Cheol
dc.contributor.author Yoo, Sung Jong
dc.date.accessioned 2017-01-24T06:50:12Z
dc.date.available 2017-01-24T06:50:12Z
dc.date.issued 2016
dc.identifier.citation Jung, N.; Bhattacharjee, S.; Gautam, S.; Park, H. Y.; Ryu, J.; Chung, Y. H.; Lee, S. Y.; Jang, I.; Jang, J. H.; Park, S. H.; Chung, D. Y.; Sung, Y. E.; Chae, K. H.; Waghmare, U. V.; Lee, S. C.; Yoo, S. J., Organic-inorganic hybrid PtCo nanoparticle with high electrocatalytic activity and durability for oxygen reduction. Npg Asia Materials 2016, 8, 10 http://dx.doi.org/10.1038/am.2015.143 en_US
dc.identifier.citation NPG Asia Materials en_US
dc.identifier.citation 8 en_US
dc.identifier.issn 1884-4049
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/2261
dc.description Open Access en_US
dc.description.abstract In Pt-transition metal (TM) alloy catalysts, the electron transfer from the TM to Pt is retarded owing to the inevitable oxidation of the TM surface by oxygen. In addition, acidic electrolytes such as those employed in fuel cells accelerate the dissolution of the surface TM oxide, which leads to catalyst degradation. Herein, we propose a novel synthesis strategy that selectively modifies the electronic structure of surface Co atoms with N-containing polymers, resulting in highly active and durable PtCo nanoparticle catalysts useful for the oxygen reduction reaction (ORR). The polymer, which is functionalized on carbon black, selectively interacts with the Co precursor, resulting in Co-N bond formation on the PtCo nanoparticle surface. Electron transfer from Co to Pt in the PtCo nanoparticles modified by the polymer is enhanced by the increase in the difference in electronegativity between Pt and Co compared with that in bare PtCo nanoparticles with the TM surface oxides. In addition, the dissolution of Co and Pt is prevented by the selective passivation of surface Co atoms and the decrease in the O-binding energy of surface Pt atoms. As a result, the catalytic activity and durability of PtCo nanoparticles for the ORR are significantly improved by the electronic ensemble effects. The proposed organic/inorganic hybrid concept will provide new insights into the tuning of nanomaterials consisting of heterogeneous metallic elements for various electrochemical and chemical applications. en_US
dc.description.uri 1884-4057 en_US
dc.description.uri http://dx.doi.org/10.1038/am.2015.143 en_US
dc.language.iso English en_US
dc.publisher Nature Publishing Group en_US
dc.rights @Nature Publishing Group, 2016 en_US
dc.subject Materials Science en_US
dc.subject Carbon-Supported Platinum en_US
dc.subject Mixed-Ligand Complexes en_US
dc.subject Fuel-Cell Catalysts en_US
dc.subject Ptxni1-X Nanoparticles en_US
dc.subject Electronic-Structure en_US
dc.subject Alloy Nanoparticles en_US
dc.subject Surface-Composition en_US
dc.subject Charge-Transfer en_US
dc.subject Skin Surfaces en_US
dc.subject Pt3Co Alloy en_US
dc.title Organic-inorganic hybrid PtCo nanoparticle with high electrocatalytic activity and durability for oxygen reduction en_US
dc.type Article en_US


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