Bimetallic ZIF derived Co nanoparticle anchored N-doped porous carbons for an efficient oxygen reduction reaction

2020 ◽  
Vol 7 (4) ◽  
pp. 946-952 ◽  
Author(s):  
Kaili Li ◽  
Daohao Li ◽  
Liangkui Zhu ◽  
Zhuangzhuang Gao ◽  
Qianrong Fang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
High Performance ◽  
Reduction Reaction ◽  
Porous Carbons ◽  
Wave Potential ◽  
Half Wave Potential ◽  
Half Wave ◽  
Reaction Performance

A high-performance electrocatalytic material was derived from a new bimetallic ZIF precursor, exhibiting excellent oxygen reduction reaction performance with a half-wave potential (E1/2) of 0.849 V, superior to that of commercial Pt/C.

scholarly journals Modified Carbon Nanotubes: Surface Properties and Activity in Oxygen Reduction Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1354
Author(s):  
Vera Bogdanovskaya ◽  
Inna Vernigor ◽  
Marina Radina ◽  
Vladimir Sobolev ◽  
Vladimir Andreev ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Zeta Potential ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Surface Area ◽  
Surface Properties ◽  
Reduction Reaction ◽  
Wave Potential ◽  
Half Wave Potential ◽  
Half Wave

In order to develop highly efficient and stable catalysts for oxygen reduction reaction (ORR) that do not contain precious metals, it is necessary to modify carbon nanotubes (CNT) and define the effect of the modification on their activity in the ORR. In this work, the modification of CNTs included functionalization by treatment in NaOH or HNO3 (soft and hard conditions, respectively) and subsequent doping with nitrogen (melamine was used as a precursor). The main parameters that determine the efficiency of modified CNT in ORR are composition and surface area (XPS, BET), hydrophilic–hydrophobic surface properties (method of standard contact porosimetry (MSP)) and zeta potential (dynamic light scattering method). The activity of CNT in ORR was assessed following half-wave potential, current density within kinetic potential range and the electrochemically active surface area (SEAS). The obtained results show that the modification of CNT with oxygen-containing groups leads to an increase in hydrophilicity and, consequently, SEAS, as well as the total (overall) current. Subsequent doping with nitrogen ensures further increase in SEAS, higher zeta potential and specific activity in ORR, reflected in the shift of the half-wave potential by 150 mV for CNTNaOH-N and 110 mV for CNTHNO3-N relative to CNTNaOH and CNTHNO3, respectively. Moreover, the introduction of N into the structure of CNTHNO3 increases their corrosion stability.

Cobalt decorated nitrogen-doped carbon bowls as efficient electrocatalysts for the oxygen reduction reaction

2020 ◽  
Vol 56 (32) ◽  
pp. 4488-4491 ◽  
Author(s):  
Haobin Zhong ◽  
Changwei Shi ◽  
Jiantao Li ◽  
Ruohan Yu ◽  
Qiang Yu ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Nitrogen Doped ◽  
Wave Potential ◽  
Half Wave Potential ◽  
Half Wave ◽  
Nitrogen Doped Carbon

Cobalt decorated nitrogen-doped carbon bowls (Co@NCB) demonstrate better ORR performance than Pt/C in terms of half-wave potential and stability.

scholarly journals An ultra-dispersive, nonprecious metal MOF–FeZn catalyst with good oxygen reduction activity and favorable stability in acid

2021 ◽  
Vol 56 (14) ◽  
pp. 8600-8612
Author(s):  
Qing Zhao ◽  
Cheng Wang ◽  
Haifeng Wang ◽  
Jianlong Wang
Keyword(s):  
Oxygen Reduction ◽  
High Performance ◽  
Reduction Reaction ◽  
Graphitic Carbon ◽  
Potential Cycling ◽  
Onset Potential ◽  
Wave Potential ◽  
Reduction Activity ◽  
Half Wave Potential ◽  
Half Wave

AbstractDevelopment of the more stable nonprecious oxygen reduction reaction (ORR) catalyst is of great significance nowadays. Herein, a high-performance iron-doped integral uniform macrocyclic organic framework (MOF–FeZn) catalyst is synthesized through a combined hydrothermal and pyrolysis process, showing favorable ORR activity and stability in acid. This as-synthesized MOF–FeZn catalyst displays high porous and graphitic structures with sufficient catalytic active dopants of pyridinic N, Fe–N, pyrrolic N, graphitic N, making it a promising ORR candidate catalyst with high electrochemical stability. The onset potential, half-wave potential and limited diffusion current density of MOF–FeZn are 0.93 V @ 0.1 mA cm−2, 0.768 V@ 2.757 mA cm−2 and 5.5 mA cm−2, respectively, which are comparable to the state-of-the-art nonprecious catalyst and commercial Pt/C. ORR catalysis on MOF–FeZn follows the nearly four-electron path. What is more, MOF–FeZn can sustain the 10,000 cycles electrochemical potential cycling process in acid with the half-wave potential changed only 21 mV, superior to the reduction of 149 mV for Pt/C. The well-developed integral uniform structures, homogeneously dispersed carbides and nitrides protected by the highly graphitic carbon layers and the better agglomeration suppression of nanoparticles by the confined graphitic carbon layers on catalyst can significantly enhance the catalytic activity and stability of MOF–FeZn.

Heterogeneous assembly of Pt-clusters on hierarchically structured CoOx@SnPd2@SnO2 quaternary nanocatalysts manifesting oxygen reduction reaction performance

2020 ◽  
Vol 44 (23) ◽  
pp. 9712-9724 ◽  
Author(s):  
Dinesh Bhalothia ◽  
Po-Chun Chen ◽  
Che Yan ◽  
Wei Yeh ◽  
Dai-Ling Tsai ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
High Performance ◽  
Reduction Reaction ◽  
Reaction Performance

Atomic Pt clusters in the heterogeneous interface of CoOx@SnPd2@SnO2 possess high heteroatomic intermixing facilities, oxygen splitting and hydration reactions resulting in high performance ORR.

scholarly journals The influence of pore size distribution on the oxygen reduction reaction performance in nitrogen doped carbon microspheres

2016 ◽  
Vol 4 (7) ◽  
pp. 2581-2589 ◽  
Author(s):  
G. A. Ferrero ◽  
K. Preuss ◽  
A. B. Fuertes ◽  
M. Sevilla ◽  
M.-M. Titirici
Keyword(s):  
Oxygen Reduction Reaction ◽  
Pore Size Distribution ◽  
Oxygen Reduction ◽  
High Performance ◽  
Rational Design ◽  
Reduction Reaction ◽  
Carbon Microspheres ◽  
Nitrogen Doped ◽  
Reaction Performance ◽  
Nitrogen Doped Carbon

High-performance nitrogen-doped carbon electrocatalysts for the oxygen reduction reaction have been synthesized by the rational design of their pore structure.

scholarly journals Template-free preparation of anthracite-based nitrogen-doped porous carbons for high-performance supercapacitors and efficient electrocatalysts for the oxygen reduction reaction

RSC Advances ◽  
2019 ◽  
Vol 9 (42) ◽  
pp. 24344-24356 ◽  
Author(s):  
Jiawei Qi ◽  
Bolin Jin ◽  
Peiyao Bai ◽  
Wendu Zhang ◽  
Lang Xu
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
High Performance ◽  
Reduction Reaction ◽  
Porous Carbons ◽  
Nitrogen Doped ◽  
Template Free

Acting as supercapacitor electrodes and ORR electrocatalysts, anthracite-based nitrogen-doped porous carbons are prepared by one/two-step activation/doping processes.

Out-of-plane FeII–N4 moiety modified Fe–N co-doped porous carbons as high-performance electrocatalysts for the oxygen reduction reaction

2017 ◽  
Vol 7 (18) ◽  
pp. 4017-4023 ◽  
Author(s):  
Zhongjie Qian ◽  
Zhaowen Hu ◽  
Zhengping Zhang ◽  
Zhilin Li ◽  
Meiling Dou ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
High Performance ◽  
Reduction Reaction ◽  
Porous Carbons ◽  
Out Of Plane ◽  
Co Doped

A Fe–N–C electrocatalyst with active FeII–N4 sites was synthesized exhibiting superior oxygen reduction performance in both alkaline and acidic electrolytes.

Fog-like fluffy structured N-doped carbon with a superior oxygen reduction reaction performance to a commercial Pt/C catalyst

Nanoscale ◽  
2015 ◽  
Vol 7 (8) ◽  
pp. 3780-3785 ◽  
Author(s):  
Chenghang You ◽  
Xiaoyuan Zen ◽  
Xiaochang Qiao ◽  
Fangfang Liu ◽  
Ting Shu ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Alkaline Medium ◽  
High Performance ◽  
Reduction Reaction ◽  
Carbon Catalyst ◽  
Reaction Performance

A high-performance N-doped carbon catalyst with a fog-like, fluffy structure was prepared. The catalyst exhibits superior ORR performance to commercial Pt/C catalyst in alkaline medium.

Sign in / Sign up

Export Citation Format

Share Document