scholarly journals Covalent triazine framework/carbon nanotube hybrids enabling selective reduction of CO2 to CO at low overpotential

2020 ◽  
Vol 22 (10) ◽  
pp. 3095-3103
Author(s):  
Andreas Laemont ◽  
Sara Abednatanzi ◽  
Parviz Gohari Derakshandeh ◽  
Florian Verbruggen ◽  
Erika Fiset ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Selective Reduction ◽  
Functionalized Carbon Nanotubes ◽  
Faradaic Efficiency ◽  
Hybrid Catalysts ◽  
Low Overpotential ◽  
Covalent Triazine Framework ◽  
Reduction Of Co2

Nitrogen-rich covalent triazine frameworks (CTFs) were grown in situ onto surface-functionalized carbon nanotubes. These novel hybrid catalysts electrochemically reduce CO2 to CO with a faradaic efficiency up to 81% at an overpotential of 380 mV.

Synthesis and Characterization of Poly(2,5-benzimidazole) (ABPBI) Grafted Carbon Nanotubes

2009 ◽  
Vol 1240 ◽  
Author(s):  
Ji-Ye Kang ◽  
Su-Mi Eo ◽  
Loon-Seng Tan ◽  
Jong-Beom Baek
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Interfacial Adhesion ◽  
Synthesis And Characterization ◽  
Acylation Reaction ◽  
Single Walled Carbon Nanotube ◽  
Mechanical And Electrical Properties ◽  
Multi Walled Carbon Nanotube

AbstractSingle-walled carbon nanotube (SWCNT) and multi-walled carbon nanotube (MWCNT) were functionalized with 3,4-diaminobenzoic acid via “direct” Friedel-Crafts acylation reaction in PPA/P2O5 to afford ortho-diamino-functionalized SWCNT (DIF-SWCNT) and MWCNT (DIF-MWCNT). The resultant DIF-SWCNT and DIF-MWCNT showed improved solubility and dispersibility. To improve interfacial adhesion between CNT and polymer matrix, the grafting of ABPBI onto the surface of DIF-SWCNT (10 wt%) or DIF-MWCNT (10 wt%) was conducted by simple in-situ polymerization of AB monomer, 3,4-diaminobenzoic acid dihydrochloride, in PPA. The resultant ABPBI-g-MWCNT and ABPBI-g-SWCNT showed improved the mechanical and electrical properties.

scholarly journals In situ synthesis of metal embedded nitrogen doped carbon nanotubes as an electrocatalyst for the oxygen reduction reaction with high activity and stability

RSC Advances ◽  
2018 ◽  
Vol 8 (44) ◽  
pp. 25051-25056 ◽  
Author(s):  
Yanhong Yin ◽  
Hengbo Zhang ◽  
Rongzhen Gao ◽  
Aili Wang ◽  
Xinxin Mao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
High Activity ◽  
Reduction Reaction ◽  
In Situ Synthesis ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

In this work, a Co–N doped carbon nanotube (CNT) catalyst was fabricated via a simple pyrolysis approach.

Low-overpotential selective reduction of CO2 to ethanol on electrodeposited Cu Au nanowire arrays

2019 ◽  
Vol 37 ◽  
pp. 176-182 ◽  
Author(s):  
Weiwei Zhu ◽  
Kuangmin Zhao ◽  
Suqin Liu ◽  
Min Liu ◽  
Feng Peng ◽  
...  
Keyword(s):  
Selective Reduction ◽  
Nanowire Arrays ◽  
Au Nanowire ◽  
Low Overpotential ◽  
Reduction Of Co2

Flexible supercapacitors based on a polyaniline nanowire-infilled 10 nm-diameter carbon nanotube porous membrane by in situ electrochemical polymerization

2016 ◽  
Vol 4 (32) ◽  
pp. 12602-12608 ◽  
Author(s):  
Ranran Wang ◽  
Qiang Wu ◽  
Xiaohua Zhang ◽  
Zhaohui Yang ◽  
Lijun Gao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Conducting Polymers ◽  
Electrochemical Polymerization ◽  
Porous Membrane ◽  
Flexible Supercapacitors ◽  
Charge Discharge

Nano-confined channels of carbon nanotubes greatly suppress volumetric changes of conducting polymers during cyclic charge–discharge processes, preventing loss of capacitance and degradation of the electrodes.

Electrochemical Tuning of Single-Wall Carbon Nanotube Mat and Investigations on Actuator Mechanism

2004 ◽  
Vol 855 ◽  
Author(s):  
S. Gupta ◽  
M. Hughes ◽  
J. Robertson
Keyword(s):  
Carbon Nanotubes ◽  
Charge Transfer ◽  
Carbon Nanotube ◽  
Bond Length ◽  
Upper Bound ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Electrochemical Tuning

ABSTRACTElectrochemical tuning of single-wall carbon nanotubes has been investigated using in situ Raman spectroscopy. We built a linear actuator from single-wall carbon nanotube mat and studied in several alkali metal (Li, Na, and K) and alkaline earth (Ca) halide solutions. The variation of bonding with electrochemical biasing was monitored using in situ Raman. This is since Raman can detect changes in C-C bond length: the radial breathing mode (RBM) at ∼190 cm−1 varies inversely with the nanotube diameter and the G band at ∼1590 cm−1 varies with the axial bond length. In addition, the intensities of both the modes vary significantly in a nonmonotonic manner pointing at the emptying/depleting or filling of the bonding and anti-bonding states - electrochemical charge injection. We discuss the variation of spectroscopic observables (intensity/frequency) of these modes providing valuable information on the charge transfer dynamics on the single-wall carbon nanotubes mat surface. We found the in-plane compressive strain (∼ -0.25%) and the charge transfer per carbon atom (fc ∼ -0.005) as an upper bound for the electrolytes used i.e. CaCl2. These results can be quantitatively understood in terms of the changes in the energy gaps between the one-dimensional van Hove singularities in the electron density of states arising possibly due to the alterations in the overlap integral of π bonds between the p orbitals of the adjacent carbon atoms. Moreover, the extent of variation of the absolute potential of the Fermi level or alternatively modification of band gap is estimated from modeling Raman intensity to be around 0.1 eV as an upper bound for CaCl2.

Poly(3-aminophenylboronic acid)-functionalized carbon nanotubes-based chemiresistive sensors for detection of sugars

The Analyst ◽  
2014 ◽  
Vol 139 (12) ◽  
pp. 3077-3082 ◽  
Author(s):  
Sushmee Badhulika ◽  
Chaker Tlili ◽  
Ashok Mulchandani
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Boronic Acid ◽  
Functionalized Carbon Nanotubes ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Enzymatic Sensor ◽  
Aminophenylboronic Acid ◽  
Poly Aniline

A poly(aniline boronic acid) (PABA)-functionalized single-walled carbon nanotube (SWNT) non-enzymatic sensor was developed for the detection of saccharides.

Confinement effects on the shape and composition of bimetallic nano-objects in carbon nanotubes

2016 ◽  
Vol 52 (11) ◽  
pp. 2362-2365 ◽  
Author(s):  
X. Li ◽  
T. Hungria ◽  
C. Garcia Marcelot ◽  
M. R. Axet ◽  
P.-F. Fazzini ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Confinement Effects ◽  
Molecular Precursors ◽  
Bimetallic Alloys

The shape and the composition of bimetallic alloys prepared by in situ reduction of molecular precursors depends on the carbon nanotube diameter.

Fe, Co, N-functionalized carbon nanotubes in situ grown on 3D porous N-doped carbon foams as a noble metal-free catalyst for oxygen reduction

2015 ◽  
Vol 3 (7) ◽  
pp. 3559-3567 ◽  
Author(s):  
Ruizhong Zhang ◽  
Shuijian He ◽  
Yizhong Lu ◽  
Wei Chen
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction ◽  
Noble Metal ◽  
Carbon Foam ◽  
Functionalized Carbon Nanotubes ◽  
Metal Free ◽  
Electrocatalytic Performance ◽  
Carbon Foams

3D Fe, Co, N-functionalized carbon nanotubes grown on carbon foam were fabricated and the hybrid exhibited high ORR electrocatalytic performance.

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