Generic synthesis of bimetallic nitride nanopore arrays as efficient electrocatalysts for hydrogen evolution reaction. (1st December 2020)

• Record Type: Journal Article
• Authors: Tang, Shasha; Ouyang, Bo; Tan, Hua; Zhou, Weiqiang; Ma, Zhaoxia; Zhang, Yongqi
• Is Part Of: Electrochimica acta. Volume 362(2020)
• Publication Date: 2020-12-01
• Subjects: Bimetallic nitride -- Nanopore arrays -- TiO2 nanotube -- Electrocatalyst -- Hydrogen evolution reaction; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2020.137222
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Bimetallic nitrides are regarded as promising electrode material for hydrogen evolution reactions (HER) via electrochemical water splitting. We fabricated two types of bimetallic nitride nanopore arrays based on the anodized TiO2 nanotube array template (NiTiNx @TiN, CoTiNx @TiN). The NiTiNx @TiN composite nanotubes exhibit superior HER performance compared to single metal nitrides, the thin film counterpart, and cobalt titanium nitride nanopore arrays. The enhancement can be attributed to the large electrochemical reactive surfaces and the conductive TiN nanopores as both scaffold and current transporter. The first-principle calculation indicates that the coordination states of Ni–Ti atoms favor the adsorption of the intermediate during the hydrogen production process. Such nanopore arrays should be also useful in OER and supercapacitors. Graphical abstract: HER electrocatalysis: Bimetallic nitride nanopore arrays is synthesized by usingTiO2 nanotube array as template. The prepared NiTiNx@TiN composite nanotubes exhibit superior HER performance, benefited from the large electrochemical reactive surfaces and the conductive TiN nanopores as both scaffold and current transporter. This work provides insights in designing low-cost, stable and high-activity bimetallic nitride electrocatalysts for HER. Image, graphical abstract