Synergistic interaction and controllable active sites of nitrogen and sulfur co-doping into mesoporous carbon sphere for high performance oxygen reduction electrocatalysts

2018 ◽  
Vol 440 ◽  
pp. 627-636 ◽  
Author(s):  
Taeseob Oh ◽  
Myeongjin Kim ◽  
Dabin Park ◽  
Jooheon Kim
Keyword(s):  
Oxygen Reduction ◽  
Mesoporous Carbon ◽  
Active Sites ◽  
High Performance ◽  
Synergistic Interaction ◽  
Carbon Sphere ◽  
Co Doping

Atomically dispersed Fe–Nx active sites within hierarchical mesoporous carbon as efficient electrocatalysts for the oxygen reduction reaction

2019 ◽  
Vol 7 (35) ◽  
pp. 20132-20138 ◽  
Author(s):  
Wenling Gu ◽  
Maochun Wu ◽  
Jing Sun ◽  
Jianbo Xu ◽  
Tianshou Zhao
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Mesoporous Carbon ◽  
Active Sites ◽  
High Performance ◽  
Reduction Reaction ◽  
Porous Graphitic Carbon ◽  
Template Removal ◽  
Hierarchically Porous ◽  
Removal Process

A novel protocol for synthesis of high performance N-doped hierarchically porous graphitic carbon electrocatalysts with single Fe atoms by pyrolyzing a mesoporous Fe–polydopamine precursor without an extra template removal process.

Highly doped and exposed Cu(i)–N active sites within graphene towards efficient oxygen reduction for zinc–air batteries

2016 ◽  
Vol 9 (12) ◽  
pp. 3736-3745 ◽  
Author(s):  
Haihua Wu ◽  
Haobo Li ◽  
Xinfei Zhao ◽  
Qingfei Liu ◽  
Jing Wang ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Active Sites ◽  
High Performance ◽  
High Density ◽  
Catalyst Loading ◽  
Zinc Air Batteries

High-density coordination unsaturated copper(i)–nitrogen embedded in graphene demonstrates a high performance and stability in primary zinc–air batteries with ultralow catalyst loading.

Investigation of Carbon Composition for Electrochemical Properties as PEMFC Cathode Catalyst

2019 ◽  
Vol 964 ◽  
pp. 13-18 ◽  
Author(s):  
Vuri Ayu Setyowati ◽  
Diah Susanti ◽  
Lukman Noerochim ◽  
Eriek Wahyu Restu Widodo ◽  
Mohammad Yusuf Sulaiman
Keyword(s):  
Electrochemical Properties ◽  
Oxygen Reduction ◽  
Active Sites ◽  
High Performance ◽  
Reduction Reaction ◽  
Chemical Compositions ◽  
Cathode Catalyst ◽  
Large Area ◽  
X Ray ◽  
Carbon Composition

Nitrogen –doped carbon material using non-precious metal was developed as catalyst fuel cell (PEMFC). In the PEMFC, the cathode reaction occurs three times slower than anode reaction. Oxygen reduction reaction (ORR) in the cathode has major limit performance. Pt/C was used as high-cost catalyst materials but many researchers concerned to improve cathode catalyst performance using high-performance and low-cost materials. Nitrogen based active sites on carbon has important role for oxygen reduction reactions process. In this study, compositions of carbon for Fe-N-C were investigated to understand the electrochemical properties and morphological analysis. Urea and PVP as nitrogen (N) source was mixed with graphite (Gt). The ratio of Gt and N were 1:1, 3:1, and 1:3. The mixture was added to FeCl3.6H2O dissolved in ethanol to produce Fe-N/C catalyst. Subsequently powder was introduced to the furnace for the pyrolysis. The catalyst products were analyzed using Potentiostat to show the electrochemical properties of catalyst, X-Ray Diffractometer (XRD) was used to know the compound or phases after catalyst syntheses, Scanning Electron Microscope – Energy Dispersive X-Ray (SEM-EDX) was used to identify the morphology and the chemical compositions of catalyst. As a result, Fe – Gt : N = 1:3 catalyst had the greatest electrochemical properties which is identified by large area of CV curve. This catalyst also had the highest current density for reduction reaction. The presence of Fe2O3 and FeS caused the degreasing of catalytic activity. As conclusions of this research, carbon composition had the important rule to improve the ORR activity.

Rational design of a highly mesoporous Fe–N–C/Fe3C/C–S–C nanohybrid with dense active sites for superb electrocatalysis of oxygen reduction

2020 ◽  
Vol 8 (44) ◽  
pp. 23436-23454
Author(s):  
Ahmed Al-Shahat Eissa ◽  
Nam Hoon Kim ◽  
Joong Hee Lee
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Active Sites ◽  
High Performance ◽  
Rational Design ◽  
Reduction Reaction ◽  
Single Step

A high-performance and sustainable electrocatalyst for the oxygen reduction reaction is fabricated by a single-step doping/annealing strategy.

The direct growth of highly dispersed CoO nanoparticles on mesoporous carbon as a high-performance electrocatalyst for the oxygen reduction reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (75) ◽  
pp. 70763-70769 ◽  
Author(s):  
Pengxi Li ◽  
Ruguang Ma ◽  
Yao Zhou ◽  
Yongfang Chen ◽  
Qian Liu ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Mesoporous Carbon ◽  
High Performance ◽  
Reduction Reaction ◽  
Electrocatalytic Oxygen Reduction ◽  
Excellent Activity ◽  
Highly Dispersed ◽  
Direct Growth ◽  
Coo Nanoparticles

Highly dispersed CoO nanoparticles on mesoporous carbon show the excellent activity and stability toward the electrocatalytic oxygen reduction reaction with a four-electron reaction path, compared to commercial Pt/C.

Two-Dimensional Mesoporous Carbon Doped with Fe–N Active Sites for Efficient Oxygen Reduction

ACS Catalysis ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 7638-7646 ◽  
Author(s):  
Yifan Ye ◽  
Haobo Li ◽  
Fan Cai ◽  
Chengcheng Yan ◽  
Rui Si ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Mesoporous Carbon ◽  
Active Sites ◽  
Two Dimensional ◽  
Carbon Doped

Two dimensional ZIF-derived ultra-thin Cu–N/C nanosheets as high performance oxygen reduction electrocatalysts for high-performance Zn–air batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (26) ◽  
pp. 14259-14266 ◽  
Author(s):  
Yi Guan ◽  
Nan Li ◽  
Yongliang Li ◽  
Lingna Sun ◽  
Yuan Gao ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Active Sites ◽  
High Performance ◽  
Two Dimensional ◽  
Great Contribution

Cu–N–C active sites make a great contribution to the activity of 2D-ZIF derived electrocatalysts.

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