Porous dendritic platinum nanotubes with extremely high activity and stability for oxygen reduction reaction.

Porous dendritic platinum nanotubes with extremely high activity and stability for oxygen reduction reaction.

Scientific reports (2013-03-26)

Gaixia Zhang, Shuhui Sun, Mei Cai, Yong Zhang, Ruying Li, Xueliang Sun

ZUSAMMENFASSUNG

Controlling the morphology of Pt nanostructures can provide opportunities to greatly increase their activity and stability. Porous dendritic Pt nanotubes were successfully synthesized by a facile, cost-effective aqueous solution method at room temperature in large scale. These unique structures are porous, hollow, hierarchical, and single crystalline, which not only gives them a large surface area with high catalyst utilization, but also improves mass transport and gas diffusion. These novel Pt structures exhibited significantly improved catalytic activity (4.4 fold) for oxygen reduction reaction (ORR) and greatly enhanced durability (6.1 fold) over that of the state-of-the-art commercial Pt/C catalyst. This work provides a promising approach to the design of highly efficient next-generation electrocatalysts.

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

205915

Sigma-Aldrich

Platinschwarz, black, powder, ≤20 μm, ≥99.95% trace metals basis

327492

Sigma-Aldrich

Platin, wire, diam. 1.0 mm, 99.9% trace metals basis

267244

Sigma-Aldrich

Platin, foil, thickness 0.025 mm, 99.9% trace metals basis

267228

Sigma-Aldrich

Platin, wire, diam. 0.5 mm, 99.9% trace metals basis

267201

Sigma-Aldrich

Platin, wire, diam. 0.5 mm, 99.99% trace metals basis

298107

Sigma-Aldrich

Platin, gauze, 52 mesh, 99.9% trace metals basis

204013

Sigma-Aldrich

Platin, powder, 99.995% trace metals basis

349402

Sigma-Aldrich

Platin, wire, diam. 0.25 mm, 99.9% trace metals basis

298093

Sigma-Aldrich

Platin, gauze, 100 mesh, 99.9% trace metals basis

520780

Sigma-Aldrich

Platinschwarz, ≥99.9% trace metals basis

349356

Sigma-Aldrich

Platin, foil, thickness 0.05 mm, 99.99% trace metals basis

685453

Sigma-Aldrich

Platin, nanopowder, <50 nm particle size (TEM)

444685

Sigma-Aldrich

Platin, wire, diam. 2.0 mm, 99.9% trace metals basis

357375

Sigma-Aldrich

Platin, wire, diam. 0.076 mm, ≥99.99% trace metals basis

357367

Sigma-Aldrich

Platin, wire, diam. 0.10 mm, 99.99% trace metals basis

520799

Sigma-Aldrich

Platinschwarz, low bulk density, ≥99.9% trace metals basis

267171

Sigma-Aldrich

Platin, wire, diam. 0.25 mm, 99.99% trace metals basis

267163

Sigma-Aldrich

Platin, wire, diam. 0.127 mm, 99.99% trace metals basis

267155

Sigma-Aldrich

Platin, sponge, ≥99.9% trace metals basis

373265

Sigma-Aldrich

Platin, wire, diam. 0.25 mm, thermocouple grade

349321

Sigma-Aldrich

Platin, foil, thickness 0.25 mm, 99.99% trace metals basis

349372

Sigma-Aldrich

Platin, foil, thickness 1.0 mm, 99.99% trace metals basis

327484

Sigma-Aldrich

Platin, shot, ≤3 mm, ≥99.9% trace metals basis

204048

Sigma-Aldrich

Platin, powder (coarse), 99.99% trace metals basis

349399

Sigma-Aldrich

Platin, wire, diam. 1.5 mm, ≥99.9% trace metals basis

349380

Sigma-Aldrich

Platin, foil, thickness 0.1 mm, 99.9% trace metals basis

303798

Sigma-Aldrich

Platin, foil, thickness 0.05 mm, ≥99.9% trace metals basis

267260

Sigma-Aldrich

Platin, foil, thickness 0.5 mm, 99.99% trace metals basis

327433

Sigma-Aldrich

Platin, foil, thickness 0.125-0.135 mm, 99.9% trace metals basis

349364

Sigma-Aldrich

Platin, foil, thickness 0.025 mm, 99.99% trace metals basis