| DOI | Resolve DOI: https://doi.org/10.1039/c4ta06250g |
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| Author | Search for: Zhang, Xuefeng1; Search for: Guan, Pengfei; Search for: Malic, Lidija2; Search for: Trudeau, Michel; Search for: Rosei, Federico; Search for: Veres, Teodor2 |
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| Affiliation | - National Research Council of Canada. Aerospace
- National Research Council of Canada. Medical Devices
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| Format | Text, Article |
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| Subject | Catalytic oxidation; Decomposition; Electrooxidation; Energy efficiency; Palladium; Platinum; Catalytic performance; Decomposition strategy; Low coordination; Structure/function relationships; Sustainable materials; Theoretical simulation; Catalyst activity |
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| Abstract | Growing needs for highly efficient energy storage devices have prompted increasing research efforts in energy-efficient and sustainable materials. In this context, nanoporous noble metals have been studied extensively because of their extraordinary properties. However, existing electrochemical/chemical dealloying approaches for their synthesis largely lack the ability to optimize their structure/function relationships. To overcome this limitation, we developed a thermal-decomposition strategy for the synthesis of component-controllable nanoporous PtPd alloys composed of ∼2 nm sawtooth-like ligaments induced by a high density of twinning boundaries (boundary spacing ∼ 1 nm). Such twinned and ultrathin ligaments exhibit large curvatures between concave and convex regions, associated with abundant low-coordination surface atomic steps and kinks. These low-coordination atoms are sites of high catalytic activity, as confirmed by theoretical simulations. The optimized Pt25Pd75 sample exhibits the best catalytic performance among all the currently reported catalysts, and has a mass activity of 1110 mA mg-1Pt-1 and high stability for the electro-oxidation of methanol. |
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| Publication date | 2015-02-07 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21275760 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | e29d7dd7-5c99-4212-a434-06e885d79b70 |
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| Record created | 2015-07-14 |
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| Record modified | 2020-04-22 |
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