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Title |
Ultrathin-Polyaniline-Coated Pt-Ni Alloy Nanooctahedra for the Electrochemical MethanolOxidation Reaction |
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Author list |
Kyung Soo Kim, Youngmin Hong, Heon Chul Kim, Sang-Il Choi, Jong Wook Hong* |
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Publication date |
2019.3.27 |
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Citation information |
Chemistry A European Journal, 25, 7185 (2019) |
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DOI |
10.1002/chem.201900238 |
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Graphical Abstract |
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Abstract |
Controlling the morphology and composition of nanocatalystsconstructed from metals and conductive polymers has attracted attention owing to their great potential for the development of high-efficiency catalysts forvarious catalytic applications. Herein, a facile synthetic approach forultrathin-polyaniline-coated Pt-Ni nanooctahedra(Pt-Ni@PANIhybrids) with controllable PANI shell thicknesses is presented. Pt-Ni nanooctahedra/Ccatalysts enclosed by PANI shells with thicknesses from 0.6 to 2.4 nm wereobtained by fine control over the amount of aniline. The various Pt-Ni@PANI hybrids exhibited electrocatalytic activity toward the methanol oxidationreaction that is highly dependent on the thickness of the PANI shell. Pt-Ni@PANI hybrids with the thinnest PANI shells (0.6 nm) showed markedly improvedelectrocatalytic performance for the methanol oxidation reaction compared with Pt-Ni@PANIhybrids with thicker PANI shells, Pt-Ni nanooctahedra/C,and commercial Pt/C due to synergistic benefits of ultrathin PANI shells and Pt-Ni alloy.
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