Trimetallic Nanoparticles Encapsulated into Bamboo‐Like N‐Doped Carbon Nanotubes as a Robust Catalyst for Efficient Oxygen Evolution Electrocatalysis. Issue 10 (17th September 2020)

• Record Type: Journal Article
• Authors: Lu, Mengting; Li, Yuwen; Wu, Yuhang; Xu, Hui; Gao, Junkuo; Xu, Shiqing
• Is Part Of: ChemNanoMat. Volume 6:Issue 10(2020)
• Page Start: 1496
• Page End: 1501
• Publication Date: 2020-09-17
• Subjects: Electrocatalysis -- Coordination Polymers -- Trimetallic doping -- Bamboo-like structure -- Oxygen evolution reaction; Nanochemistry -- Periodicals; Nanostructured materials -- Periodicals; Nanochemistry; Nanostructured materials; Periodicals; 541.2
• DOI: 10.1002/cnma.202000365
• Languages: English
• ISSNs: 2199-692X

Abstract

Abstract: High‐efficiency oxygen evolution reaction (OER) electrocatalysts based on transition metal materials are one of the most promising alternatives, but their activity and durability are still far from desirable. Here, we report trimetallic N‐doped carbon nanotubes with rapid electron transport and rapid diffusion of the electrolyte that can significantly enhance the OER. The introduction of a third metal can adjust the electronic structure, thereby causing favorable intermediate adsorption on the catalysts. The optimized catalyst CoFeNi@CNTs exhibits a low overpotential of 287 mV at 10 mA cm −2 and a small Tafel slope of 32 mV dec −1, which are obviously superior to the precious catalyst IrO2 and most previously reported catalysts. The CoFeNi@CNTs also exhibit excellent OER stability with small current density decay after 12 h. The outstanding OER activity is ascribed to the unique carbon nanotube structure and strong synergy between three metals. Abstract : Trimetallic N‐doped carbon nanotubes with rapid electron transport and rapid diffusion of the electrolyte were synthesized through a pyrolysis‐oxidation process. The synergistic cooperation between trimetallic components as well as the unique carbon nanotube structure endow the CoFeNi@CNTs electrocatalysts with excellent OER activity and outstanding durability.