Self-assembly porous metal-free electrocatalysts templated from sulfur for efficient oxygen reduction reaction

2018 ◽  
Vol 462 ◽  
pp. 65-72 ◽  
Author(s):  
Qin Xiang ◽  
Sha Li ◽  
Xuefeng Zou ◽  
Yujie Qiang ◽  
Bingbing Hu ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Self Assembly ◽  
Porous Metal ◽  
Reduction Reaction ◽  
Metal Free

NaCl protected synthesis of 3D hierarchical metal-free porous nitrogen-doped carbon catalysts for the oxygen reduction reaction in acidic electrolyte

2019 ◽  
Vol 55 (61) ◽  
pp. 9023-9026 ◽  
Author(s):  
Rui Wu ◽  
Xiaoju Wan ◽  
Jianghai Deng ◽  
Xun Huang ◽  
Siguo Chen ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
High Performance ◽  
Porous Metal ◽  
Reduction Reaction ◽  
Protective Agent ◽  
Metal Free ◽  
Hierarchical Porous ◽  
Carbon Catalysts ◽  
Nitrogen Doped Carbon

A high-performance 3D hierarchical porous metal-free N-doped carbon catalyst for oxygen reduction reaction in acidic medium was synthesized with ZnO as a mesoporous template and NaCl as both a macroporous template and a structure protective agent.

N-Doped holey carbon materials derived from a metal-free macrocycle cucurbit[6]uril assembly as an efficient electrocatalyst for the oxygen reduction reaction

2019 ◽  
Vol 55 (92) ◽  
pp. 13832-13835 ◽  
Author(s):  
Dongshuang Wu ◽  
Minna Cao ◽  
Hanhui You ◽  
Chuan Zhao ◽  
Rong Cao
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Self Assembly ◽  
Carbon Materials ◽  
Reduction Reaction ◽  
Nitrogen Doped ◽  
Metal Free

The first example of the preparation of nitrogen-doped holey carbon (NHC) with abundant in-plane holes derived from a rigid macrocycle cucurbit[6]uril self-assembly is reported.

scholarly journals Biomass Related Highly Porous Metal Free Carbon for Gas Storage and Electrocatalytic Applications

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3488
Author(s):  
Samantha K. Samaniego Andrade ◽  
István Bakos ◽  
Gábor Dobos ◽  
Attila Farkas ◽  
Gábor Kiss ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Electrode Materials ◽  
Gas Adsorption ◽  
Porous Metal ◽  
Reduction Reaction ◽  
Free Carbon ◽  
Metal Free ◽  
Marine Biomass ◽  
Hierarchical Pore

In this paper we report the synthesis of a N, S co-doped metal free carbon cryogel obtained from a marine biomass derived precursor using urea as nitrogen source. Natural carrageenan intrinsically contains S and inorganic salt. The latter also serves as an activating agent during the pyrolytic step. The overall 11.6 atomic % surface heteroatom concentration comprises 5% O, 4.6% N and 1% S. The purified and annealed final carbon (CA) has a hierarchical pore structure of micro-, meso- and macropores with an apparent surface area of 1070 m2/g. No further treatment was applied. The gas adsorption potential of the samples was probed with H2, CO2 and CH4, while the electrocatalytic properties were tested in an oxygen reduction reaction. The atmospheric CO2 and CH4 storage capacity at 0 °C in the low pressure range is very similar to that of HKUST-1, with the CO2/CH4 selectivity below 20 bar, even exceeding that of the MOF, indicating the potential of CA in biogas separation. The electrocatalytic behavior was assessed in an aqueous KOH medium. The observed specific gravimetric capacitance 377 F/g was exceeded only in B, N dual doped and/or graphene doped carbons from among metal free electrode materials. The CA electrode displays almost the same performance as a commercial 20 wt% Pt/C electrode. The oxygen reduction reaction (ORR) exhibits the 4-electron mechanism. The 500-cycle preliminary stability test showed only a slight increase of the surface charge.

scholarly journals Tailored ionic liquid for metal-free carbons toward oxygen reduction reaction

Carbon Trends ◽  
2021 ◽  
Vol 3 ◽  
pp. 100038
Author(s):  
Jian Gao ◽  
Xiujuan Chu ◽  
Xiaoyao Tan ◽  
Hongqi Sun ◽  
Zhen Yin ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Metal Free
Sign in / Sign up

Export Citation Format

Share Document