Covalent organic polymer assisted synthesis of bimetallic electrocatalysts with multicomponent active dopants for efficient oxygen evolution reaction. (20th October 2019)

• Record Type: Journal Article
• Authors: Ma, Dong-Dong; Cao, Changsheng; Li, Xiaofang; Cheng, Jin-Tian; Zhou, Li-Li; Wu, Xin-Tao; Zhu, Qi-Long
• Is Part Of: Electrochimica acta. Volume 321(2019)
• Publication Date: 2019-10-20
• Subjects: Covalent organic polymer -- Bimetallic electrocatalyst -- Multiple components -- Oxygen evolution reaction; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2019.134679
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: The development of highly active and stable electrocatalysts for the oxygen evolution reaction is of great importance for renewable-energy. Herein, a novel hybrid nanomaterial with multicomponent active dopants was conveniently fabricated by pyrolytic conversion from a bimetallic ion-decorated heteroatom-rich (P, S and N) covalent organic polymer (COP) composite. The unique nanostructure with innumerable Co9- x Ni x S8 and CoNiP nanoparticles anchored on P/S/N multi-doped carbon/carbon nanotubes, through in situ electrochemical reconstruction effectively provides substantial active sites and promotes charge transfer, and hence affords outstanding activity with a low overpotential of 270 mV at 10 mA cm −2 and excellent stability for oxygen evolution reaction based on two runs of 10-h durability test in alkaline solution, which much outperformed the fewer-component counterparts. Graphical abstract: Image 1 Highlights: A new heteroatom-rich (P, S and N) covalent organic polymer was designed and synthesized. P/S/N multi-doped carbon/carbon nanotubes anchored with Co9- x Ni x S8 and CoNiP nanoparticles was fabricated. The optimized catalyst showed efficient and long-term stable electrocatalytic oxygen evolution.