Tailoring the hetero-structure of iron oxides in the framework of nitrogen doped carbon for the oxygen reduction reaction and zinc–air batteries

2020 ◽  
Vol 8 (48) ◽  
pp. 25791-25804
Author(s):  
Zhourong Xiao ◽  
Chan Wu ◽  
Wei Wang ◽  
Lun Pan ◽  
Jijun Zou ◽  
...  
Keyword(s):  
Peak Power ◽  
Thermal Reduction ◽  
Reduction Reaction ◽  
Hetero Structure ◽  
Reduction Strategy ◽  
Nitrogen Doped ◽  
Carbon Framework ◽  
Air Battery ◽  
Nitrogen Doped Carbon ◽  
Zinc Air Batteries

We report a H2-thermal-reduction strategy to fabricate FeOx/Fe NPs dispersed on a porous N-doped carbon framework. The optimal hybrid exhibited high ORR performance with an E1/2 of 0.838 V and remarkable Zn–air battery performance with a peak power density of 156.6 mW cm−2.

Highly dispersed γ-Fe2O3 embedded in nitrogen doped carbon for the efficient oxygen reduction reaction

2019 ◽  
Vol 9 (17) ◽  
pp. 4581-4587 ◽  
Author(s):  
Zhourong Xiao ◽  
Guoqiang Shen ◽  
Fang Hou ◽  
Rongrong Zhang ◽  
Yueting Li ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Power Density ◽  
Reduction Reaction ◽  
Sacrificial Template ◽  
Nitrogen Doped ◽  
Highly Dispersed ◽  
Air Battery ◽  
Nitrogen Doped Carbon

A sacrificial template strategy is developed to synthesize highly dispersed γ-Fe2O3 embedded in porous N-doped carbon. The as-synthesized catalyst exhibits high ORR performance and presents a power density of 112 mW cm−2 in zinc–air battery.

scholarly journals Cobalt Nanoparticles on Plasma-Controlled Nitrogen-Doped Carbon as High-Performance ORR Electrocatalyst for Primary Zn-Air Battery

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 223 ◽  
Author(s):  
Seonghee Kim ◽  
Hyun Park ◽  
Oi Lun Li
Keyword(s):  
High Performance ◽  
Synergetic Effect ◽  
Carbon Support ◽  
Reduction Reaction ◽  
Cobalt Nanoparticles ◽  
Limiting Current ◽  
Onset Potential ◽  
Nitrogen Doped ◽  
Air Battery ◽  
Nitrogen Doped Carbon

Metal–air batteries and fuel cells have attracted much attention as powerful candidates for a renewable energy conversion system for the last few decades. However, the high cost and low durability of platinum-based catalysts used to enhance sluggish oxygen reduction reaction (ORR) at air electrodes prevents its wide application to industry. In this work, we applied a plasma process to synthesize cobalt nanoparticles catalysts on nitrogen-doped carbon support with controllable quaternary-N and amino-N structure. In the electrochemical test, the quaternary-N and amino-N-doped carbon (Q-A)/Co catalyst with dominant quaternary-N and amino-N showed the best onset potential (0.87 V vs. RHE) and highest limiting current density (−6.39 mA/cm2). Moreover, Q-A/Co was employed as the air catalyst of a primary zinc–air battery with comparable peak power density to a commercial 20 wt.% Pt/C catalyst with the same loading, as well as a stable galvanostatic discharge at −20 mA/cm2 for over 30,000 s. With this result, we proposed the synergetic effect of transitional metal nanoparticles with controllable nitrogen-bonding can improve the catalytic activity of the catalyst, which provides a new strategy to develop a Pt-free ORR electrocatalyst.

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