PMID- 23108295
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20140415
LR  - 20121106
IS  - 1463-9084 (Electronic)
IS  - 1463-9076 (Linking)
VI  - 14
IP  - 46
DP  - 2012 Dec 14
TI  - Quantitative DEMS study of ethanol oxidation: effect of surface structure and Sn 
      surface modification.
PG  - 16115-29
LID - 10.1039/c2cp42520c [doi]
AB  - Using the dual thin layer flow through cell, a semi-quantitative analysis of the 
      volatile products during the electrooxidation of adsorbed and bulk solution of 
      0.01 M ethanol at polycrystalline platinum, smooth, roughened and Sn modified 
      Pt(11,1,1), Pt(311) electrodes has been done by on-line differential 
      electrochemical mass spectroscopy (DEMS). In addition to the current efficiency 
      of CO(2), that of acetaldehyde was determined as a function of the flow rate. At 
      polycrystalline platinum, ethanol oxidation produces only acetaldehyde; the 
      amount of acetaldehyde further oxidized to acetic acid is negligible due to 
      convection conditions. For comparison and for calibration purposes, i-propanol 
      oxidation was examined for which acetone is the only oxidation product. At 
      Pt(11,1,1), the main oxidation product is acetaldehyde. At Pt(311), in addition 
      to acetaldehyde, acetic acid was also formed. Surface modification with Sn did 
      not increase the reactivity of Pt(11,1,1) instead it led to inhibition of the 
      ethanol oxidation. In the case of Pt(311), the onset potential of oxidation was 
      shifted negatively by 0.2 V in the presence of Sn. The results of the 
      potentiostatic measurements showed that this shift is not associated with the 
      production of CO(2); rather acetic acid and acetaldehyde are the main oxidation 
      products.
FAU - Mostafa, Ehab
AU  - Mostafa E
AD  - Institute of Physical and Theoretical Chemistry, University of Bonn, Germany.
FAU - Abd-El-Latif, Abd-El-Aziz A
AU  - Abd-El-Latif AE
FAU - Ilsley, Richard
AU  - Ilsley R
FAU - Attard, Gary
AU  - Attard G
FAU - Baltruschat, Helmut
AU  - Baltruschat H
LA  - eng
PT  - Journal Article
PL  - England
TA  - Phys Chem Chem Phys
JT  - Physical chemistry chemical physics : PCCP
JID - 100888160
EDAT- 2012/10/31 06:00
MHDA- 2012/10/31 06:01
CRDT- 2012/10/31 06:00
PHST- 2012/10/31 06:00 [entrez]
PHST- 2012/10/31 06:00 [pubmed]
PHST- 2012/10/31 06:01 [medline]
AID - 10.1039/c2cp42520c [doi]
PST - ppublish
SO  - Phys Chem Chem Phys. 2012 Dec 14;14(46):16115-29. doi: 10.1039/c2cp42520c.