Carbon-supported silver (Ag/C) catalysts with different Ag contents are prepared using the Ag (I) coordination polymer, [Ag(C7H6NO2)(C6H12N4)(H2O)]n. The mechanism and activity of the oxygen reduction reaction (ORR) on these Ag/C catalysts are investigated by the cyclic voltammetry and the rotating ring disk electrode (RRDE) in alkaline solutions. The test results indicate that, under the same Ag crystallite sizes, the activities increase with increasing Ag contents from 5 to 20 wt.% and the ORR proceeds by a four-electron pathway on Ag/C catalysts, but with decreasing Ag contents, the ORR is catalyzed via the four-electron pathway and the two-electron pathway simultaneously.

References

References
1.
Wiberg
,
G. K. H.
,
Mayrhofer
,
K. J. J.
, and
Arenz
,
M.
,
2010
, “
Investigation of the Oxygen Reduction Activity on Silver—A Rotating Disc Electrode Study
,”
Fuel Cells
,
10
(
4
), pp.
575
581
.10.1002/fuce.200900136
2.
Kucernak
,
A.
,
Bidault
,
F.
, and
Smith
,
G.
,
2012
, “
Membrane Electrode Assemblies Based on Porous Silver Electrodes for Alkaline Anion Exchange Membrane Fuel Cells
,”
Electrochim. Acta
,
82
, pp.
284
290
.10.1016/j.electacta.2012.03.027
3.
Lu
,
Y. Z.
, and
Chen
,
W.
,
2012
, “
Size Effect of Silver Nanoclusters on Their Catalytic Activity for Oxygen Electro-Reduction
,”
J. Power Sources.
,
197
(
1
), pp.
107
110
.10.1016/j.jpowsour.2011.09.033
4.
Garcia
,
A. C.
,
Gasparotto
,
L. H. S.
,
Gomes
,
J. F.
,
Tremiliosi-Filho
,
G.
,
2012
, “
Straightforward Synthesis of Carbon-Supported Ag Nanoparticles and Their Application for the Oxygen Reduction Reaction
,”
Electrocatalysis
,
3
, pp.
147
152
.10.1007/s12678-012-0096-z
5.
Yi
,
Q. F.
, and
Song
,
L. H.
,
2012
, “
Polyaniline-Modified Silver and Binary Silver-Cobalt Catalysts for Oxygen Reduction Reaction
,”
Electroanalysis
,
24
, pp.
1655
1663
.10.1002/elan.201200154
6.
Alia
,
S. M.
,
Duong
,
K.
,
Liu
,
T.
,
Jensen
,
K.
, and
Yan
,
Y.
,
2012
, “
Supportless Silver Nanowires as Oxygen Reduction Reaction Catalysts for Hydroxide-Exchange Membrane Fuel Cells
,”
ChemSusChem
,
5
(
8
), pp.
1619
1624
.10.1002/cssc.201100684
7.
Kostowskyj
,
M. A.
,
Gilliam
,
R. J.
, and
Kirk
,
D. W.
,
2008
, “
Silver Nanowire Catalysts for Alkaline Fuel Cells
,”
Int. J. Hydrogen Energy
,
33
, pp.
5773
5778
.10.1016/j.ijhydene.2008.05.040
8.
Lima
,
F. H. B.
,
Sanches
,
C. D.
, and
Ticianelli
,
E. A.
,
2005
, “
Physical Characterization and Electrochemical Activity of Bimetallic Platinum-Silver Particles for Oxygen Reduction in Alkaline Electrolyte
,”
J. Electrochem. Soc.
,
152
, pp.
A1466
A1473
.10.1149/1.1933514
9.
Demarconnay
,
L.
,
Coutanceau
,
C.
, and
Leger
,
J. M.
,
2004
, “
Electroreduction of Dioxygen (ORR) in Alkaline Medium on Ag/C and Pt/C Nanostructured Catalysts—Effect of the Presence of Methanol
,”
Electrochim. Acta
,
49
, pp.
4513
4521
.10.1016/j.electacta.2004.05.009
10.
Coutanceau
,
C.
,
Demarconnay
,
L.
, and
Lamy
,
C.
,
2006
, “
Development of Electrocatalysts for Solid Alkaline Fuel Cell (SAFC)
,”
J. Power Sources
,
156
, pp.
14
19
.10.1016/j.jpowsour.2005.08.035
11.
Guo
,
J. S.
,
Hsu
,
A.
, and
Chu
,
D.
,
2010
, “
Improving Oxygen Reduction Reaction Activities on Carbon-Supported Ag Nanoparticles in Alkaline Solutions
,”
J. Phys. Chem.
,
114
, pp.
4324
4330
.
12.
Yang
,
Y. F.
,
Zhou
,
Y. H.
, and
Cha
,
C. S.
,
1995
, “
Improving Oxygen Reduction Reaction Activities on Carbon-Supported Ag Nanoparticles in Alkaline Solutions
,”
Electrochim. Acta
,
40
, pp.
2579
2586
.10.1016/0013-4686(95)00247-C
13.
Han
,
J. J.
, and
Li
,
N.
,
2007
, “
Catena-Poly[[(2-Amino-3,5-Dimethylbenzenesulfonato-κO)Silver(I)]-μ-1-1’-(Butane-1,4-diyl)Diimidazole-κ2N3:N3′]
,”
Acta Crystallogr., Sect. E: Struct. Rep. Online
,
E63
, pp.
M1622
M1633
.10.1107/S1600536807021897
14.
Han
,
J. J.
,
Li
,
N.
, and
Liu
,
D. L.
,
2009
, “
Preparation of Ag/C Catalysts for the O2 Electrode by the Ag(I) SCRM
,”
Mater. Chem. Phys.
,
115
, pp.
685
689
.10.1016/j.matchemphys.2009.02.013
15.
Han
,
J. J.
,
Li
,
N.
, and
Zhang
,
T. Y.
,
2009
, “
Ag/C Nanoparticles as an Cathode Catalyst for a Zinc-Air Battery With a Flowing Alkaline Electrolyte
,”
J. Power Sources
,
193
, pp.
885
889
.10.1016/j.jpowsour.2009.02.082
16.
Han
,
J. J.
,
Zhang
,
T. Y.
, and
Geng
,
L.
,
2010
, “
Catena-Poly[[(4-Aminobenzoato) aquasilver(I)]-μ-Hexamethylenetetramine]
,”
Acta Crystallogr., Sect. E: Struct. Rep. Online
,
66
, pp.
M111
U277
.10.1107/S1600536809055044
17.
Jiang
,
R. Z.
, and
Anson
,
F. C.
,
1991
, “
The Origin of Inclined Plateau Currents in Steady-State Voltammograms for Electrode Processes Involving Electrocatalysis
J. Electroanal. Chem.
305
, pp.
171
184
.10.1016/0022-0728(91)85516-R
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