Journal
CHEMICAL ENGINEERING JOURNAL
Volume 437, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.135281
Keywords
Nitride; N-doped carbon; Electrocatalysts; Water splitting; Zn-air batteries
Categories
Funding
- National Natural Science Foundation of China [51971182, 51871119, 22075141, 2210011636]
- Science and Technology Projects of Suzhou City [SYG201938, SYG202025]
- Jiangsu Provincial Founds for Natural Science Foundation [BK20210311]
- China Postdoctoral Science Foundation [2021M691561, 2021T140319]
- Jiangsu Postdoctoral Research Fund [2021K547C]
Ask authors/readers for more resources
A novel synthesis strategy was developed to prepare hierarchically porous cobalt nitride hybrid nano sheets, which exhibited remarkable catalytic activity. The CoN@NC electrode showed excellent catalytic performance in oxygen evolution reaction, hydrogen evolution reaction, and oxygen reduction reaction, making it a promising material for electrocatalysis and energy storage applications.
Compositional and structural engineering of high-performance catalysts is vital for electrochemical catalysis, but challenges remain in their facile synthesis and efficient controls. Herein, a novel vaporization-nitridation synthesis strategy with simple operation is developed to prepare hierarchically porous cobalt nitride hybrid nano sheets grown on Ni foam by coupling cobalt nitride with N-doped carbon (CoN@NC). Benefitting from the highly open 3D hierarchical porous architecture and strong coupling effect between CoN and NC, the obtained CoN@NC electrode possesses accelerated ion and electron transfer. Moreover, the transform from CoN to CoOOH during water oxidation is confirmed by in-situ Raman characterizations, which together with NC and CoN species afford multiple active sites. The optimized CoN@NC-300 exhibits remarkable trifunctional catalytic activity towards OER, HER and ORR. Consequently, a two-electrode electrolyzer based on CoN@NC-300 needs only a voltage of 1.53 V to achieve the current density of 10 mA cm(-2). Moreover, the flexible Zn-air battery assembled with CoN@NC exhibits high performance and superior durability. This work offers a novel method for designing metal nitride hybrids as highly efficient multifunctional electrocatalysts towards electrocatalysis and energy storage.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available