Catalytic hydrogen evolution reaction on “metal-free” graphene: key role of metallic impurities

Nanoscale ◽  
2019 ◽  
Vol 11 (23) ◽  
pp. 11083-11085 ◽  
Author(s):  
Lu Wang ◽  
Zdeněk Sofer ◽  
Martin Pumera
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Hydrogen ◽  
Energy Strategy ◽  
Metal Free ◽  
Free Graphene ◽  
Catalytic Hydrogen ◽  
Catalytic Hydrogen Evolution ◽  
Metallic Impurities ◽  
Potential Carbon

Molecular hydrogen is widely considered as a potential carbon-free and renewable energy carrier for a sustainable energy strategy. Carbon nanotubes are widely promoted as metal-free catalysts – however, we show that the metallic impurities drive hydrogen production.

scholarly journals Pyridine-decorated carbon nanotubes as a metal-free heterogeneous catalyst for mild CO2 reduction to methanol with hydroboranes

2017 ◽  
Vol 7 (24) ◽  
pp. 5833-5837 ◽  
Author(s):  
G. Tuci ◽  
A. Rossin ◽  
L. Luconi ◽  
C. Pham-Huu ◽  
S. Cicchi ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Heterogeneous Catalyst ◽  
Co2 Reduction ◽  
Catalytic Performance ◽  
Metal Free ◽  
Mild Conditions ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Pyridine decorated multi-walled carbon nanotubes have been employed as heterogeneous metal-free catalysts for CO2 hydroboration to methyl borinate under mild conditions. Mechanistic insights have unveiled the non-innocent role of the nanotube carrier in the catalytic performance.

Residual metallic impurities within carbon nanotubes play a dominant role in supposedly “metal-free” oxygen reduction reactions

2014 ◽  
Vol 50 (84) ◽  
pp. 12662-12664 ◽  
Author(s):  
Lu Wang ◽  
Martin Pumera
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction ◽  
Dominant Role ◽  
Free Carbon ◽  
Free Oxygen ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions ◽  
Metal Free ◽  
Metallic Impurities

ORR electrocatalysis on the supposedly metal-free carbon nanotubes is in fact due to the presence of residual metallic impurities within.

Beyond Demonstration: The Role of Fuel Cells in DoD's Energy Strategy

2011 ◽  
Author(s):  
Thomas J. Gross ◽  
Jr Poche ◽  
Ennis Albert J. ◽  
Kevin C.
Keyword(s):  
Fuel Cells ◽  
Energy Strategy

scholarly journals The role of carbon nanotubes on the sensitivity of composites with polyaniline for ammonia sensors

Carbon Trends ◽  
2021 ◽  
Vol 3 ◽  
pp. 100026
Author(s):  
Marcelo Eising ◽  
Colin O'Callaghan ◽  
Carlos Eduardo Cava ◽  
Ariane Schmidt ◽  
Aldo José Gorgatti Zarbin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Ammonia Sensors

Amine-functionalized multi-walled carbon nanotubes (EDA-MWCNTs) for electrochemical water splitting reactions

2021 ◽  
Author(s):  
Shankar S. Narwade ◽  
Shivsharan M. Mali ◽  
Bhaskar R. Sathe
Keyword(s):  
Carbon Nanotubes ◽  
Water Splitting ◽  
Metal Free ◽  
Overall Water Splitting ◽  
Amine Functionalized ◽  
Multi Walled Carbon Nanotubes ◽  
Electrochemical Water Splitting ◽  
Walled Carbon Nanotubes

A study on the in situ decoration of ethylenediamine (EDA) on acid functionalized multi-walled carbon nanotubes (O-MWCNTs) for overall water splitting reactions at all pH as an efficient and inexpensive metal-free multifunctional electrocatalyst.

scholarly journals Non-purified commercial multiwalled carbon nanotubes supported on electrospun polyacrylonitrile@polypyrrole nanofibers as photocatalysts for water decontamination

RSC Advances ◽  
2021 ◽  
Vol 11 (17) ◽  
pp. 9911-9920
Author(s):  
Gabriele Capilli ◽  
Damian Rodríguez Sartori ◽  
Monica C. Gonzalez ◽  
Enzo Laurenti ◽  
Claudio Minero ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Advanced Oxidation Processes ◽  
Supported Catalyst ◽  
Advanced Oxidation ◽  
Multiwalled Carbon ◽  
Water Decontamination ◽  
Oxidation Processes ◽  
Commercial Carbon ◽  
Metallic Impurities

Under UV-Vis irradiation, the metallic impurities embedded in non-purified commercial carbon nanotubes generate radicals suitable for advanced oxidation processes. Semiconducting PPY membranes enhance the photo activity of a supported catalyst.

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