PMID- 26674375
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20160517
LR  - 20160113
IS  - 1944-8252 (Electronic)
IS  - 1944-8244 (Linking)
VI  - 8
IP  - 1
DP  - 2016 Jan 13
TI  - Electrochemical Behavior of TiO(x)C(y) as Catalyst Support for Direct Ethanol 
      Fuel Cells at Intermediate Temperature: From Planar Systems to Powders.
PG  - 716-25
LID - 10.1021/acsami.5b09861 [doi]
AB  - To achieve complete oxidation of ethanol (EOR) to CO2, higher operating 
      temperatures (often called intermediate-T, 150-200  degrees C) and appropriate catalysts 
      are required. We examine here titanium oxycarbide (hereafter TiOxCy) as a 
      possible alternative to standard carbon-based supports to enhance the stability 
      of the catalyst/support assembly at intermediate-T. To test this material as 
      electrocatalyst support, a systematic study of its behavior under electrochemical 
      conditions was carried out. To have a clear description of the chemical changes 
      of TiOxCy induced by electrochemical polarization of the material, a special 
      setup that allows the combination of X-ray photoelectron spectroscopy and 
      electrochemical measurements was used. Subsequently, an electrochemical study was 
      carried out on TiOxCy powders, both at room temperature and at 150  degrees C. The 
      present study has revealed that TiOxCy is a sufficiently conductive material 
      whose surface is passivated by a TiO2 film under working conditions, which 
      prevents the full oxidation of the TiOxCy and can thus be considered a stable 
      electrode material for EOR working conditions. This result has also been 
      confirmed through density functional theory (DFT) calculations on a simplified 
      model system. Furthermore, it has been experimentally observed that ethanol 
      molecules adsorb on the TiOxCy surface, inhibiting its oxidation. This result has 
      been confirmed by using in situ Fourier transform infrared spectroscopy (FTIRS). 
      The adsorption of ethanol is expected to favor the EOR in the presence of 
      suitable catalyst nanoparticles supported on TiOxCy.
FAU - Calvillo, Laura
AU  - Calvillo L
AD  - Department of Chemical Sciences, University of Padova , Via Marzolo 1, Padua 
      35131, Italy.
FAU - Garcia, Gonzalo
AU  - Garcia G
AD  - Instituto Universitario de Materiales y Nanotecnologia, Universidad de La Laguna 
      , Astrofisico F. Sanchez s/n, La Laguna, Tenerife 38071, Spain.
FAU - Paduano, Andrea
AU  - Paduano A
AD  - Department of Industrial Engineering, University of Padova , Via Marzolo 9, Padua 
      35131, Italy.
FAU - Guillen-Villafuerte, Olmedo
AU  - Guillen-Villafuerte O
AD  - Instituto Universitario de Materiales y Nanotecnologia, Universidad de La Laguna 
      , Astrofisico F. Sanchez s/n, La Laguna, Tenerife 38071, Spain.
FAU - Valero-Vidal, Carlos
AU  - Valero-Vidal C
AD  - Leopold-Franzens-University Innsbruck, Institute of Physical Chemistry , Innrain 
      52c, Innsbruck 6020, Austria.
FAU - Vittadini, Andrea
AU  - Vittadini A
AD  - CNR-IENI , Via Marzolo 1, Padua 35131, Italy.
FAU - Bellini, Marco
AU  - Bellini M
AD  - CNR-ICCOM , Via Madonna del Piano 10, Sesto Fiorentino, Florence 50019, Italy.
FAU - Lavacchi, Alessandro
AU  - Lavacchi A
AD  - CNR-ICCOM , Via Madonna del Piano 10, Sesto Fiorentino, Florence 50019, Italy.
FAU - Agnoli, Stefano
AU  - Agnoli S
AD  - Department of Chemical Sciences, University of Padova , Via Marzolo 1, Padua 
      35131, Italy.
FAU - Martucci, Alessandro
AU  - Martucci A
AD  - Department of Industrial Engineering, University of Padova , Via Marzolo 9, Padua 
      35131, Italy.
FAU - Kunze-Liebhauser, Julia
AU  - Kunze-Liebhauser J
AD  - Leopold-Franzens-University Innsbruck, Institute of Physical Chemistry , Innrain 
      52c, Innsbruck 6020, Austria.
FAU - Pastor, Elena
AU  - Pastor E
AD  - Instituto Universitario de Materiales y Nanotecnologia, Universidad de La Laguna 
      , Astrofisico F. Sanchez s/n, La Laguna, Tenerife 38071, Spain.
FAU - Granozzi, Gaetano
AU  - Granozzi G
AD  - Department of Chemical Sciences, University of Padova , Via Marzolo 1, Padua 
      35131, Italy.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20151228
PL  - United States
TA  - ACS Appl Mater Interfaces
JT  - ACS applied materials & interfaces
JID - 101504991
OTO - NOTNLM
OT  - DEFCs
OT  - electrochemical stability
OT  - intermediate-T
OT  - support
OT  - titanium oxycarbide
EDAT- 2015/12/18 06:00
MHDA- 2015/12/18 06:01
CRDT- 2015/12/18 06:00
PHST- 2015/12/18 06:00 [entrez]
PHST- 2015/12/18 06:00 [pubmed]
PHST- 2015/12/18 06:01 [medline]
AID - 10.1021/acsami.5b09861 [doi]
PST - ppublish
SO  - ACS Appl Mater Interfaces. 2016 Jan 13;8(1):716-25. doi: 10.1021/acsami.5b09861. 
      Epub 2015 Dec 28.