Citation: Xu Jing-Jing, Xiao Chun-Hui, Ding Shu-Jiang. Red-blood-cell like nitrogen-doped carbons with highly catalytic activity towards oxygen reduction reaction[J]. Chinese Chemical Letters, ;2017, 28(4): 748-754. doi: 10.1016/j.cclet.2016.12.006 shu

Red-blood-cell like nitrogen-doped carbons with highly catalytic activity towards oxygen reduction reaction

Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an 710049, China

Corresponding author: Ding Shu-Jiang, dingsj@xjtu.edu.cn
Received Date: 8 August 2016
Revised Date: 2 November 2016
Accepted Date: 29 November 2016
Available Online: 10 April 2016

Figures(5)

A highly active nitrogen-doped catalyst with a unique red-blood-cell(RBC)like structure is reported for oxygen reduction reaction(ORR).The catalyst Fe, N-C@carbon-900 was prepared by pyrolysis of the polyaniline(PANI)and polystyrene(PS)composites with adsorption of ferric ion on the shell of sphere structure at 900 ℃.Fe, N-C@carbon-900 with a unique RBC-like structure provides plenty of catalytic sites combining the electrical conductivity of the carbon sphere with the catalytic activity of the nitrogen-doped layer.The four-electron reduction pathway is selected for the catalyst Fe, N-C@carbon-900.The catalyst exhibit the ORR E_onset at 0.87 V(potentials is versus to reversible hydrogen electrode (RHE)), E_1/2 at 0.78 V and high diffusion-limiting current density(5.20 mA/cm²).Furthermore, this work indicates that both N and Fe accounted for high activity of the catalyst Fe, N-C@carbon-900 toward the oxygen reduction process.It is concluded that Fe and N exhibit synergistically promotion in the ORR activity for the catalyst Fe, N-C@carbon-900.We also provide a rational design of electrocatalysts with high ORR activity to further clarify the essential ORR sites of heteroatom doped carbon materials for fuel cells and metal-air battery applications.
- Nitrogen-doped carbon,
- Red-blood-cell like structure,
- ORR,
- PANI,
- Electrocatalysts,
- Four-electronpathway
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