TY - JOUR
T1 - Induced electrochemical reduction of nitrates species on interface of Pt/MWCNTS prepared by vapor-phase impregnation-decomposition method
AU - Torres-Santillan, E.
AU - Vargas-Garcia, J. R.
AU - Ramirez-Meneses, E.
AU - Manzo-Robledo, A.
AU - Hernandez-Perez, M. A.
N1 - Publisher Copyright:
© 2019 Revista Mexicana de Ingeniera Quimica. All rights reserved.
PY - 2019
Y1 - 2019
N2 - Pt nanoparticles were supported on multi-wall carbon nanotubes (MWCNTs) and conventional C-Vulcan XC72 by a vaporphase impregnation-decomposition method using platinum acetylacetonate as precursor. Both types of carbon supports were impregnated with the precursor vapors at 180 °C and 3-7 Torr inside a horizontal quartz tube reactor. Then, they were heated at 400 °C to achieve precursor decomposition and subsequent formation of Pt nanoparticles. Carbon supports, and Pt precursor were mixed in several weight ratios. The Pt content was approximately 5, 10 and 25 wt.%. TEM observations revealed Pt particles ranging from 2.4 to 3.3 nm uniformly distributed on either nanotubes or conventional carbon support. The catalytic activity for nitrate electro-reduction (NER) was investigated in NaNO3 + NaOH solutions using Cycling Voltammetry (CV). The CV measurements showed a redox process from -0.7 to -1.0 V/SCE associated to the nitrate reduction process. It was found that Pt/MWCNTs materials display superior nitrate reduction activity than Pt/C-Vulcan XC72, even the comparable Pt decisive features. The superior activity seems to be associated to the inherent structural features of MWCNTs. Thus, Pt/MWCNTs are attractive materials for electrodes on the nitrate reduction process in alkaline medium aqueous.
AB - Pt nanoparticles were supported on multi-wall carbon nanotubes (MWCNTs) and conventional C-Vulcan XC72 by a vaporphase impregnation-decomposition method using platinum acetylacetonate as precursor. Both types of carbon supports were impregnated with the precursor vapors at 180 °C and 3-7 Torr inside a horizontal quartz tube reactor. Then, they were heated at 400 °C to achieve precursor decomposition and subsequent formation of Pt nanoparticles. Carbon supports, and Pt precursor were mixed in several weight ratios. The Pt content was approximately 5, 10 and 25 wt.%. TEM observations revealed Pt particles ranging from 2.4 to 3.3 nm uniformly distributed on either nanotubes or conventional carbon support. The catalytic activity for nitrate electro-reduction (NER) was investigated in NaNO3 + NaOH solutions using Cycling Voltammetry (CV). The CV measurements showed a redox process from -0.7 to -1.0 V/SCE associated to the nitrate reduction process. It was found that Pt/MWCNTs materials display superior nitrate reduction activity than Pt/C-Vulcan XC72, even the comparable Pt decisive features. The superior activity seems to be associated to the inherent structural features of MWCNTs. Thus, Pt/MWCNTs are attractive materials for electrodes on the nitrate reduction process in alkaline medium aqueous.
KW - Carbon Nanotubes
KW - Electroreduction
KW - Nanoparticles
KW - Nitrates
KW - Platinum
UR - http://www.scopus.com/inward/record.url?scp=85070473930&partnerID=8YFLogxK
U2 - 10.24275/uam/izt/dcbi/revmexingquim/2019v18n2/Torres
DO - 10.24275/uam/izt/dcbi/revmexingquim/2019v18n2/Torres
M3 - Artículo
SN - 1665-2738
VL - 18
SP - 431
EP - 439
JO - Revista Mexicana de Ingeniera Quimica
JF - Revista Mexicana de Ingeniera Quimica
IS - 2
ER -