2015
DOI: 10.1126/science.aab0801
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Platinum-based nanocages with subnanometer-thick walls and well-defined, controllable facets

Abstract: A cost-effective catalyst should have a high dispersion of the active atoms, together with a controllable surface structure for the optimization of activity, selectivity, or both. We fabricated nanocages by depositing a few atomic layers of platinum (Pt) as conformal shells on palladium (Pd) nanocrystals with well-defined facets and then etching away the Pd templates. Density functional theory calculations suggest that the etching is initiated via a mechanism that involves the formation of vacancies through th… Show more

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Cited by 905 publications
(821 citation statements)
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References 38 publications
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“…To further prove the formation of the core-shell structure, we etched away Pd cores according to a selective etching method. 33 As shown in Figure S6, the formed nanocage structure further confirms that the core is consisted of Pd. During the process, the reduction rate of Pd reduced gradually as the concentration of Pd precursor sharply decreased.…”
Section: Resultssupporting
confidence: 75%
“…To further prove the formation of the core-shell structure, we etched away Pd cores according to a selective etching method. 33 As shown in Figure S6, the formed nanocage structure further confirms that the core is consisted of Pd. During the process, the reduction rate of Pd reduced gradually as the concentration of Pd precursor sharply decreased.…”
Section: Resultssupporting
confidence: 75%
“…Another notable example is Pt cubic and octahedral nanocages with subnanometer-thick walls, as shown in Fig. 8e, exhibiting distinctive catalytic activities towards ORR [70].…”
Section: Hollow Structurementioning
confidence: 99%
“…d TEM images of Pt 3 Ni nanoframes [69]. e TEM image of Pt octahedral nanocages and HAADF-STEM image of an individual nanocage [70]. f HRTEM images of jagged Pt NWs supported on carbon [71].…”
Section: D Structure With High-index Facetsmentioning
confidence: 99%
“…Comparing with the solid cubes, the open frames can provide larger accessible surfaces and shorter diffusion distances for guest species [25][26][27][28][29][30][31][32][33][34][35][36]. Such an ability of the mesoframes can be highly desirable for hosting guest alkaline ions.…”
Section: Introductionmentioning
confidence: 99%