PMID- 18563225
OWN - NLM
STAT- MEDLINE
DCOM- 20080922
LR  - 20161124
IS  - 1463-9076 (Print)
IS  - 1463-9076 (Linking)
VI  - 10
IP  - 25
DP  - 2008 Jul 7
TI  - CoPt nanoparticles and their catalytic properties in electrooxidation of CO and 
      CH(3)OH studied by in situ FTIRS.
PG  - 3645-54
LID - 10.1039/b802047g [doi]
AB  - CoPt nanoparticles supported on a glassy carbon electrode (denoted as CoPt/GC) 
      were prepared by galvanic replacement reaction between electrodeposited Co 
      nanoparticles and K(2)PtCl(6) solution. Scanning electron microscope (SEM) and 
      transmission electron microscope (TEM) were both employed to characterize the 
      CoPt nanoparticles. It was shown that the CoPt nanoparticles have irregular 
      shapes and most of them exhibit a core-shell structure with a porous Co core and 
      a shell of Pt tiny particles. The composition of the CoPt nanoparticles was 
      analyzed by energy-dispersive X-ray spectroscopy (EDX), which depicts a Co : Pt 
      ratio of ca. 21 : 79. Studies of cyclic voltammetry (CV) demonstrated that 
      CoPt/GC possesses a much higher catalytic activity towards CO and methanol 
      electrooxidation than a nanoscale Pt thin film electrode. In situ FTIR 
      spectroscopic studies have revealed for the first time, that a CoPt nanoparticles 
      electrode exhibits abnormal IR effects (AIREs) for IR absorption of CO adsorbed 
      on it. In comparison with the IR features of CO adsorbed on a bulk Pt electrode, 
      the direction of the IR bands of CO adsorbed on the CoPt/GC electrode is inverted 
      completely, and the intensity of the IR bands has been enhanced up to 15.4 times. 
      The AIREs is significant in detecting the adsorbed intermediate species involved 
      in electrocatalytic reactions. The results demonstrated a reaction mechanism of 
      CH(3)OH oxidation on CoPt/GC in alkaline solutions through evidencing CO(L), 
      CO(M), HCOO(-), CO(3)(2-), HCO(3)(-) and CO(2) as intermediate and product 
      species by in situ FTIRS.
FAU - Chen, Qing-Song
AU  - Chen QS
AD  - State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of 
      Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, 
      Xiamen, 361005, China.
FAU - Sun, Shi-Gang
AU  - Sun SG
FAU - Zhou, Zhi-You
AU  - Zhou ZY
FAU - Chen, Yan-Xin
AU  - Chen YX
FAU - Deng, Shi-Bin
AU  - Deng SB
LA  - eng
PT  - Journal Article
DEP - 20080508
PL  - England
TA  - Phys Chem Chem Phys
JT  - Physical chemistry chemical physics : PCCP
JID - 100888160
RN  - 0 (Alloys)
RN  - 0 (Bicarbonates)
RN  - 0 (Carbonates)
RN  - 0 (Formates)
RN  - 0 (cobalt platinum alloy)
RN  - 0YIW783RG1 (formic acid)
RN  - 142M471B3J (Carbon Dioxide)
RN  - 7U1EE4V452 (Carbon Monoxide)
RN  - Y4S76JWI15 (Methanol)
SB  - IM
MH  - Alloys/chemical synthesis/*chemistry
MH  - Bicarbonates/chemistry
MH  - Carbon Dioxide/chemistry
MH  - Carbon Monoxide/*chemistry
MH  - Carbonates/chemistry
MH  - Catalysis
MH  - Electric Power Supplies
MH  - Electrochemistry
MH  - Electrodes
MH  - Electron Probe Microanalysis
MH  - Electroplating
MH  - Formates/chemistry
MH  - Methanol/*chemistry
MH  - Microscopy, Electron, Scanning
MH  - Microscopy, Electron, Transmission
MH  - Oxidation-Reduction
MH  - *Spectroscopy, Fourier Transform Infrared
MH  - Surface Properties
EDAT- 2008/06/20 09:00
MHDA- 2008/09/23 09:00
CRDT- 2008/06/20 09:00
PHST- 2008/06/20 09:00 [pubmed]
PHST- 2008/09/23 09:00 [medline]
PHST- 2008/06/20 09:00 [entrez]
AID - 10.1039/b802047g [doi]
PST - ppublish
SO  - Phys Chem Chem Phys. 2008 Jul 7;10(25):3645-54. doi: 10.1039/b802047g. Epub 2008 
      May 8.