1D Coaxial Platinum/Titanium Nitride Nanotube Arrays with Enhanced Electrocatalytic Activity for the Oxygen Reduction Reaction: Towards Li–Air Batteries

Abstract

CAT ON A HOT TIN SUPPORT: Coaxial Pt/TiN nanotube arrays are used to achieve a superior electrocatalytic activity of platinum towards the oxygen reduction reaction (ORR). Compared to a commercial Pt/C catalyst, the Pt/TiN NTA materials delivers a higher mass activity and specific activity for the ORR. Hence, these materials are useful as cathodes for hybrid electrolyte Li-air batteries, as demonstrated.

Electrocatalysis on Shape‐Controlled Titanium Nitride Nanocrystals for the Oxygen Reduction Reaction

“…The corresponding Koutecky-Levich (K-L) plots [28] (Figure 4 B) showed good linearity with parallelism over the potential range from À0.45 to À0.65 V, which suggested a similar electron-transfer number per O 2 molecule involved and first-order dependence of O 2 kinetics in the ORR. [26,28] The electron transfer number (n) involved in the oxygen reduction at each of the TiN electrodes was analyzed by RDE and calculated on the basis of the K-L equations given below [Eqs. To better understand the electrocatalytic performance of TiN catalysts during the ORR process, linear sweep voltammetry (LSV) curves were measured using RDE in O 2 -saturated 0.1 m KOH solution at a rotation rate of 1600 rpm.…”

A Carbon‐ and Binder‐Free Nanostructured Cathode for High‐Performance Nonaqueous Li‐O2 Battery

“…Among them, titanium nitride (TiN), which has been widely used as cathode support for the electrocatalyst of oxygen reduction in aqueous electrolyte, has also attracted extensive attention 20, 21, 22. However, the reported TiN carbon‐free cathode was fabricated with nanoparticles and only exhibited poor capacities with serious polarization 15, 19.…”

Facile synthesis and magnetic study of Ni@polyamide 66 coaxial nanotube arrays

“…For example, Ding et al prepared the Ni/Pt core/shell nanotube arrays showing remarkably enhanced electrocatalytic activity and stability for methanol oxidation [12]. Coaxial Pt/NiN nanotube arrays were synthesized and they showed improved electrocatalytic performance for the oxygen reduction reaction in Li-air batteries [13]. TiO 2 /PbS (ZnS) coaxial nanotubes showed improved photocatalytic properties and analysis [14].…”