From a ureidopyrimidinone containing organic precursor to excavated iron-nitrogen codoped hierarchical mesoporous carbon (Ex-FeN-MC) as an efficient bifunctional electrocatalyst

Nanoscale ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 5658-5666 ◽  
Author(s):  
Raheel Akram ◽  
Muhammad Aizaz Ud Din ◽  
Sami Ullah Dar ◽  
Anila Arshad ◽  
Wei Liu ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Iron Nitrate ◽  
Organic Precursor ◽  
Bifunctional Electrocatalyst ◽  
Silica Template

An efficient bifunctional electrocatalyst Ex-FeN-MC prepared from uriedopyrimidinone based organic precursor and iron nitrate in presence of silica template.

Effect of Loading Amount of Glucose Precursor on Mesoporous Carbon Surface Area for Supercapacitor Electrode Application

2016 ◽  
Vol 857 ◽  
pp. 101-105
Author(s):  
Farinaa Md Jamil ◽  
Mohd Ali Sulaiman ◽  
Suhaina Mohd Ibrahim ◽  
Abdul Kadir Masrom ◽  
Muhd Zu Azhan Yahya
Keyword(s):  
Surface Area ◽  
Mesoporous Carbon ◽  
Carbon Surface ◽  
Supercapacitor Electrode ◽  
Carbon Sample ◽  
Large Pore ◽  
Bet Analysis ◽  
Loading Amount ◽  
Silica Template ◽  
Effect Of Glucose

Effect of glucose loading on the synthesis mesoporous carbon had been studied using hard template method where mesoporous silica SBA-15 was used as a template. To obtain a large pore of mesoporous carbon sample, a large pore of silica template was used. A series of mesoporous carbon sample was synthesized by loading different amounts of glucose (2.5g, 5.0g and 10.0g) as a carbon precursor to ensure that the template was fully impregnated with precursor. After treatment process, the surface area of carbon samples were measured with Brunauer-Emmett-Teller (BET) analysis and it shows that higher amount of glucose gives higher surface area due to the large pore of the template used. The samples then were tested with cyclic voltammetry technique at different scan rates (10, 20, 30 and 50 mVs-1) in 6M KOH electrolyte. It reveals that higher surface area samples show a higher specific capacitance with 119 F/g at slow scan rate 10 mVs-1.

Facile one-pot synthesis of a nitrogen-doped mesoporous carbon architecture with cobalt oxides encapsulated in graphitic layers as a robust bicatalyst for oxygen reduction and evolution reactions

2016 ◽  
Vol 4 (43) ◽  
pp. 16920-16927 ◽  
Author(s):  
Wenhui Hu ◽  
Qing Wang ◽  
Shanshan Wu ◽  
Yongmin Huang
Keyword(s):  
Oxygen Reduction ◽  
Mesoporous Carbon ◽  
High Efficiency ◽  
Cobalt Oxides ◽  
One Pot ◽  
Bifunctional Electrocatalyst ◽  
Nitrogen Doped ◽  
One Pot Synthesis

A high efficiency cobalt, nitrogen-codoped bifunctional electrocatalyst for oxygen reduction and evolution reactions.

Nitrile chain reactions for cyano-based ionic liquid derived mesoporous carbon as efficient bifunctional electrocatalyst

2018 ◽  
Vol 280 ◽  
pp. 258-265 ◽  
Author(s):  
Ying Su ◽  
Hao Wang ◽  
Jie Zhao ◽  
Mark H. Rummeli ◽  
Yongqian Gao ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Mesoporous Carbon ◽  
Chain Reactions ◽  
Bifunctional Electrocatalyst

scholarly journals Encapsulating metal organic framework into hollow mesoporous carbon sphere as efficient oxygen bifunctional electrocatalyst

2019 ◽  
Vol 7 (3) ◽  
pp. 609-619 ◽  
Author(s):  
Wanfeng Xiong ◽  
Hongfang Li ◽  
Hanhui You ◽  
Minna Cao ◽  
Rong Cao
Keyword(s):  
Electrical Conductivity ◽  
Hybrid Material ◽  
Mesoporous Carbon ◽  
Metal Organic Framework ◽  
Reduction Reaction ◽  
Carbon Sphere ◽  
Hydrogen Electrode ◽  
Zeolitic Imidazolate Framework ◽  
Bifunctional Electrocatalyst ◽  
Metal Organic

Abstract Applying metal organic frameworks (MOFs) in electrochemical systems is a currently emerging field owing to the rich metal nodes and highly specific surface area of MOFs. However, the problems for MOFs that need to be solved urgently are poor electrical conductivity and low ion transport. Here we present a facile in situ growth method for the rational synthesis of MOFs@hollow mesoporous carbon spheres (HMCS) yolk–shell-structured hybrid material for the first time. The size of the encapsulated Zeolitic Imidazolate Framework-67 (ZIF-67) is well controlled to 100 nm due to the spatial confinement effect of HMCS, and the electrical conductivity of ZIF-67 is also increased significantly. The ZIF@HMCS-25% hybrid material obtained exhibits a highly efficient oxygen reduction reaction activity with 0.823 V (vs. reversible hydrogen electrode) half-wave potential and an even higher kinetic current density (JK = 13.8 mA cm−2) than commercial Pt/C. ZIF@HMCS-25% also displays excellent oxygen evolution reaction performance and the overpotential of ZIF@HMCS-25% at 10 mA cm−2 is 407 mV. In addition, ZIF@HMCS-25% is further employed as an air electrode for a rechargeable Zn–air battery, exhibiting a high power density (120.2 mW cm−2 at 171.4 mA cm−2) and long-term charge/discharge stability (80 h at 5 mA cm−2). This MOFs@HMCS yolk–shell design provides a versatile method for the application of MOFs as electrocatalysts directly.

In situ growth of spinel CoFe2O4 nanoparticles on rod-like ordered mesoporous carbon for bifunctional electrocatalysis of both oxygen reduction and oxygen evolution

2015 ◽  
Vol 3 (30) ◽  
pp. 15598-15606 ◽  
Author(s):  
Pengxi Li ◽  
Ruguang Ma ◽  
Yao Zhou ◽  
Yongfang Chen ◽  
Zhenzhen Zhou ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Oxygen Evolution ◽  
Mesoporous Carbon ◽  
Ordered Mesoporous Carbon ◽  
In Situ Growth ◽  
Cofe2o4 Nanoparticles ◽  
Bifunctional Electrocatalyst ◽  
Ordered Mesoporous

A bifunctional electrocatalyst for both oxygen reduction and oxygen evolution was prepared by in situ growth of CoFe2O4 nanoparticles on rod-like ordered mesoporous carbon.

MESOPOROUS CARBON POWDER GAS SENSORS FOR DETECTION OF CARBON MONOXIDE

2009 ◽  
Vol 21 (06) ◽  
pp. 399-404 ◽  
Author(s):  
Chih-Cheng Lu ◽  
Kuan-Hsun Liao ◽  
Jeff Tsung-Hui Tsai ◽  
Chueh-Yang Liu ◽  
Jih-Perng Leu
Keyword(s):  
Electric Fields ◽  
Mesoporous Carbon ◽  
Microelectromechanical Systems ◽  
High Specific Surface Area ◽  
Carbon Powder ◽  
Resistance Change ◽  
Sensitive Film ◽  
Silica Template ◽  
Silicon Based ◽  
Hexagonally Ordered

This article reports a new class of silicon-based microgas sensors utilizing hexagonally-ordered mesoporous carbon powders (MCPs) as the sensitive film. The mesoporous carbon powders featuring high-specific surface area are replicated by the SBA-15 silica template and immobilized between Cr electrodes on a 9 × 9 cm silicon chip by using a.c. dielectrophoresis (DEP) process at room temperature. The silicon sensor platform comprises Cr microheaters embedded in a dielectric thin membrane manufactured by microelectromechanical systems back-etching techniques. It is shown that MCPs can be satisfactorily aligned along electric fields and accumulated to the electrode area. Investigations into CO detection are carried out to verify gas-sensitive characteristics of the MCP nanofilm. Our experimental results disclose the mesoporous carbon powders are successfully chemoresistive to CO , and demonstrate distinct resistance change with respect to ppm-level variation. In addition, response time, recovery time, and reproducible sensing behavior are experimentally obtained.

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