New PtRu catalyst anodes for methanol oxidation were prepared by a thermal decomposition method on titanium mesh supports. The supports employed were: Single layer (titanium mesh), double layer (two layers of titanium mesh were spot-welded together), and triple layer (two layers of titanium mesh with carbon paper between were spot-welded together). The catalytic activity of such anodes for the oxidation of methanol was characterized using galvanostatic measurements and electrochemical impedance spectroscopy in combination with scanning electron microscopy. The results showed that the PtRu catalyst thermally decomposed on the double-layer mesh support exhibited a higher catalytic activity for methanol electro-oxidation than those supported on carbon powders. Preliminary direct methanol fuel cell (DMFC) data show that the power density of the DMFC with the new anode is higher than that with carbon-supported anodes. A further increase in power density for the DMFC with the new anodes is expected with optimization of the mesh support with regard to structure, mesh material, and catalyst coating methods.

1.
Scott
,
K.
,
Taama
,
W. M.
, and
Argyropoulos
,
P.
, 1999, “
Engineering Aspects of the Direct Methanol Fuel Cell System
,”
J. Power Sources
0378-7753,
79
(
1
), pp.
43
59
.
2.
Scott
,
K.
,
Argyropoulos
,
P.
,
Yiannopoulos
,
P.
, and
Taama
,
W. M.
, 2001, “
Electrochemical and Gas Evolution Characteristics of Direct Methanol Fuel Cells with Stainless-Steel Mesh Flow Beds
,”
J. Appl. Electrochem.
0021-891X,
31
(
8
), pp.
823
832
.
3.
Takasu
,
Y.
, and
Murakami
,
Y.
, 2000, “
Design of oxide electrodes with large surface area
,”
Electrochim. Acta
0013-4686,
45
(
25–26
), pp.
4135
4141
.
4.
Beer
,
H. B
, 1980, “
The Invention and Industrial Development of Metal Anodes
,”
J. Electrochem. Soc.
0013-4651,
127
(
8
), pp.
303c
307c
.
5.
Yu
,
E. H.
, and
Scott
,
K.
, 2004, “
Direct Methanol Alkaline Fuel Cell with Catalysed Metal Mesh Anodes
,”
Electrochem. Commun.
,
6
(
4
), pp.
361
365
.
6.
Trasatti
,
S.
, 1991, “
Physical Electrochemistry of Ceramic Oxides
,”
Electrochim. Acta
0013-4686,
36
(
2
), pp.
225
241
.
7.
Argyropoulos
,
P.
,
Scott
,
K.
,
Shukla
,
A. K.
, and
Jackson
,
C.
, 2003, “
A Semiempirical Model of the Direct Methanol Fuel Cell Performance. Part I: Model Development and Verification
,”
J. Power Sources
0378-7753,
123
(
2
), pp.
190
199
.
8.
Gasteiger
,
H. A.
,
Ross
, Jr.,
P. N.
, and
Cairns
,
E. J.
, 1993, “
LEIS and AES on Sputtered and Annealed Polycrystalline Pt-Ru Bulk Alloys
,”
Surf. Sci.
0039-6028,
293
(
1–2
), pp.
67
80
.
9.
Nanni
,
L.
,
Polozzi
,
S.
,
Benedetti
,
A.
, and
DeBatti
,
A.
, 1999, “
Morphology, Microstructure, and Electrocatalytic Properties of RuO2–SnO2 Thin Films
,”
J. Electrochem. Soc.
0013-4651,
146
(
1
), pp.
220
225
.
10.
Ito
,
M.
,
Murakami
,
Y.
,
Kaji
,
H.
,
Yahikozawa
,
K.
, and
Takasu
,
Y.
, 1996, “
Surface Characterization of RuO2–SnO2 Coated Titanium Electrodes
,”
J. Electrochem. Soc.
0013-4651,
143
(
1
), pp.
32
36
.
11.
Yang
,
L. X.
,
Bock
,
C.
,
MacDougall
,
B.
, and
Park
,
J.
, 2004, “
The Role of the WOx Ad-Component to Pt and PtRu Catalysts in the Electrochemical CH3OH Oxidation Reaction
,”
J. Appl. Electrochem.
0021-891X,
34
(
4
), pp.
427
438
.
12.
Hammond
,
C. R.
, “
2003-2004, Section 4: Properties of the Elements and Inorganic Compounds
,” in
CRC Handbook of Chemistry and Physics
,
84th Ed.
edited by
D. R.
Lide
,
CRC Press
, Boston, pp.
4
23
.
13.
Hogarth
,
M. P.
, 1995, “
The Development of the Direct Methanol Fuel Cell
,” Ph.D thesis, University of Newcastle upon Tyne, Newcastle upon Tyne.
14.
Gojkovic
,
S. L.
,
Vidakovic
,
T. R.
, and
Durovic
,
D. R.
, 2003, “
Kinetic Study of Methanol Oxidation on Carbon-Supported PtRu Electrocatalyst
,”
Electrochim. Acta
0013-4686,
48
(
24
), pp.
3607
3614
.
15.
Gojkovic
,
S. L.
, and
Vidakovic
,
T. R.
, 2001, “
Methanol Oxidation on an Ink Type Electrode using Pt Supported on High Area Carbons
,”
Electrochim. Acta
0013-4686,
47
(
4
), pp.
633
642
.
16.
Nordlund
,
J.
, 2003, “
The Anode in the Direct Methanol Fuel Cell
,” Doctoral thesis, KTH Chemical Engineering and Technology, Stockholm, Sweden.
17.
Rheaume
,
J. M.
,
Muller
,
B.
, and
Schulze
,
M.
, 1998, “
XPS Analysis of Carbon-Supported Platinum Electrodes and Characterization of CO Oxidation on PEM Fuel Cell Anodes by Electrochemical Half Cell Methods
,”
J. Power Sources
0378-7753,
76
(
1
), pp.
60
68
.
18.
Muller
,
J. T.
,
Urban
,
P. M.
, and
Holderich
,
W. F.
, 1999, “
Impedance Studies on Direct Methanol Fuel Cell Anodes
,”
J. Power Sources
0378-7753,
84
(
2
), pp.
157
160
.
19.
Shukla
,
A. K.
,
Jackson
,
C. L.
,
Scott
,
K.
, and
Murgia
,
G.
, 2002, “
A Solid-Polymer Electrolyte Direct Methanol Fuel Cell with a Mixed Reactant and Air Anode
,”
J. Power Sources
0378-7753,
111
(
1
), pp.
43
51
.
20.
Ren
,
X.
,
Zelenay
,
P.
,
Thomas
,
S.
,
Davey
,
J.
, and
Gottesfeld
,
S.
, 2000, “
Recent Advances in Direct Methanol Fuel Cells at Los Alamos National Laboratory
,”
J. Power Sources
0378-7753,
86
(
1–2
), pp.
111
116
.
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