Environmental Engineering Reference
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Figure 11.10 Single potential alteration infrared (SPAIR) spectra of the species coming from
ethanol adsorption and oxidation on a Pt-Sn (90 : 10)/C electrode (0.1 M HClO
4
þ
0.1 M
C
2
H
5
OH, 25 8C). The reference spectrum was taken at 50 mV vs. RHE.
or
Pt
þ
CH
3
CH
2
OH
!
Pt
(CHOH-CH
3
)
ads
þ
e
þ
H
þ
(11
:
14)
Pt
(OCH
2
CH
3
)
ads
!
Pt
þ
CHO-CH
3
þ
e
þ
H
þ
(11
:
15)
or
!
Pt
þ
CHO-CH
3
þ
e
þ
H
þ
Pt
(CHOH-CH
3
)
ads
(11
:
16)
TABLE 11.2 Chemical Yields in Acetic Acid, Acetaldehyde, and CO
2
for
Pt/C and Pt-Sn (9 : 1)/C Catalysts during Ethanol Electro-oxidation under
DEFC Operating Conditions at 80 8C for 4 Hours
a
Acetic Acid/Products/%
Acetaldehyde/Products/%
2
/Products/%
Pt/C 60 wt%
32.5
47.5
20
Pt-Sn (9 : 1)/
C 60 wt%
76.9
15.4
7.7
a
Experimental conditions are described in Rousseau et al. [2006].
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