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Conference Paper: Electrochemica Co-generation of Ozone and Hydrogen Peroxidel
Title | Electrochemica Co-generation of Ozone and Hydrogen Peroxidel |
---|---|
Authors | |
Issue Date | 2009 |
Publisher | Electrochemical Society. |
Citation | The 215th ECS Meeting, San Francisco, CA, 24 - 29 May 2009, p. Abstract no. 1021 How to Cite? |
Abstract | Both ozone and hydrogen peroxide are powerful green
oxidants. Ozone found applications in oxidation of
organic and inorganic compounds, disinfection,
sterilization, deodorization and decoloration processes1-2.
Hydrogen peroxide has been applied to the organic
synthesis, wastewater treatment, bleaching of paper pulp
and textiles3
. Furthermore, ozone can react with hydrogen
peroxide and generate more powerful oxidant hydroxyl
radicals via the peroxone process as formula (1) shows
H2O2+2O3→2OH·
+ 3O2 (1)
Hydroxyl radical with oxidation potential of 2.8 V can
oxidize some chemicals in wastewater even ozone and
hydrogen peroxide individually can not4
. In-situ cogeneration
of ozone and hydrogen peroxide in
electrochemical flow cell can eliminate transportation
costs. It is a safe way to electro-chemically generate
ozone and hydrogen peroxide on-site, so its application
will be largely simplified5
. The current efficiency for
electrochemical ozone generation of 36.3% could be
obtained on the antimony- and nickel- doped tin oxide
electrode6-7. There were efforts to co-generate ozone and
hydrogen peroxide in electrochemical cell8-9, but the
current efficiency for ozone generation was lower than
20% and the current efficiency for hydrogen peroxide
generation was less than 4%. We reported here that cogeneration
of ozone at doped tin oxide anode and
hydrogen peroxide at reticulated vitreous carbon (RVC)
cathode in a proton-exchange-membrane electrochemical
micro flow cell. The current efficiency for ozone and
hydrogen peroxide co-generation was largely improved.
References
1. U.V. Gunten, Water res., 37, 1469(2003)
2. L.M. Da Silva, L. A. De Faria and J. F. C Boodts, Pure
Appl. Chem., 73, 1871(2001)
3. A. D. Pozzo, L. D. Palma, C. Merli and E. Petrucci, J.
Appl. Electrochem.,35, 413(2005)
4. C. D. Adams, P. A. Scanlan and N. D. Secrist, Environ.
Sci. Technol., 28, 1812 (1994)
5. Z. Qiang, J. H. Chang and C. P. Huang, Water Res., 36,
85(2002)
6. Y. H. Wang, S.A. Cheng, K.Y. Chan and X.Y. Li, J.
Electrochem. Soc., 152, D197 (2005)
7. Y. H. Wang, S.A. Cheng, K.Y. Chan, Green Chem.,
8,568(2006)
8. P. Tatapudi and J.M. Fenton, J. Electrochem. Soc., 141,
1174(1994)
9. O.J. Murphy and G. D. Hitchens, US005972196A,
(1999)
Fig. 2 SEM image of freshly prepared doped tin oxide
electrode
Fig. 1 Illustration of the co-generation of ozone and hydrogen
peroxide in electrochemical cell
Nafion 324
Doped tin oxide electrode
O2 +2H+
+2e-
H2O2
E0
= 0.682 V
3 H2O O3 + 6 H+
+6eE0
=1.51 V
Cathodic compartment H2O2
Anodic compartment O3
Ag/AgCl electrode
RVC
215th ECS Meeting, Abstract #1021, © The Electrochemical Society
Downloaded on 2016-03-31 to IP 147.8 |
Persistent Identifier | http://hdl.handle.net/10722/224388 |
ISBN |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Zhou, H | - |
dc.contributor.author | Chan, GKY | - |
dc.date.accessioned | 2016-04-01T07:01:04Z | - |
dc.date.available | 2016-04-01T07:01:04Z | - |
dc.date.issued | 2009 | - |
dc.identifier.citation | The 215th ECS Meeting, San Francisco, CA, 24 - 29 May 2009, p. Abstract no. 1021 | - |
dc.identifier.isbn | 9781615672509 | - |
dc.identifier.uri | http://hdl.handle.net/10722/224388 | - |
dc.description.abstract | Both ozone and hydrogen peroxide are powerful green oxidants. Ozone found applications in oxidation of organic and inorganic compounds, disinfection, sterilization, deodorization and decoloration processes1-2. Hydrogen peroxide has been applied to the organic synthesis, wastewater treatment, bleaching of paper pulp and textiles3 . Furthermore, ozone can react with hydrogen peroxide and generate more powerful oxidant hydroxyl radicals via the peroxone process as formula (1) shows H2O2+2O3→2OH· + 3O2 (1) Hydroxyl radical with oxidation potential of 2.8 V can oxidize some chemicals in wastewater even ozone and hydrogen peroxide individually can not4 . In-situ cogeneration of ozone and hydrogen peroxide in electrochemical flow cell can eliminate transportation costs. It is a safe way to electro-chemically generate ozone and hydrogen peroxide on-site, so its application will be largely simplified5 . The current efficiency for electrochemical ozone generation of 36.3% could be obtained on the antimony- and nickel- doped tin oxide electrode6-7. There were efforts to co-generate ozone and hydrogen peroxide in electrochemical cell8-9, but the current efficiency for ozone generation was lower than 20% and the current efficiency for hydrogen peroxide generation was less than 4%. We reported here that cogeneration of ozone at doped tin oxide anode and hydrogen peroxide at reticulated vitreous carbon (RVC) cathode in a proton-exchange-membrane electrochemical micro flow cell. The current efficiency for ozone and hydrogen peroxide co-generation was largely improved. References 1. U.V. Gunten, Water res., 37, 1469(2003) 2. L.M. Da Silva, L. A. De Faria and J. F. C Boodts, Pure Appl. Chem., 73, 1871(2001) 3. A. D. Pozzo, L. D. Palma, C. Merli and E. Petrucci, J. Appl. Electrochem.,35, 413(2005) 4. C. D. Adams, P. A. Scanlan and N. D. Secrist, Environ. Sci. Technol., 28, 1812 (1994) 5. Z. Qiang, J. H. Chang and C. P. Huang, Water Res., 36, 85(2002) 6. Y. H. Wang, S.A. Cheng, K.Y. Chan and X.Y. Li, J. Electrochem. Soc., 152, D197 (2005) 7. Y. H. Wang, S.A. Cheng, K.Y. Chan, Green Chem., 8,568(2006) 8. P. Tatapudi and J.M. Fenton, J. Electrochem. Soc., 141, 1174(1994) 9. O.J. Murphy and G. D. Hitchens, US005972196A, (1999) Fig. 2 SEM image of freshly prepared doped tin oxide electrode Fig. 1 Illustration of the co-generation of ozone and hydrogen peroxide in electrochemical cell Nafion 324 Doped tin oxide electrode O2 +2H+ +2e- H2O2 E0 = 0.682 V 3 H2O O3 + 6 H+ +6eE0 =1.51 V Cathodic compartment H2O2 Anodic compartment O3 Ag/AgCl electrode RVC 215th ECS Meeting, Abstract #1021, © The Electrochemical Society Downloaded on 2016-03-31 to IP 147.8 | - |
dc.language | eng | - |
dc.publisher | Electrochemical Society. | - |
dc.relation.ispartof | Abstract of the 215th ECS Meeting | - |
dc.rights | Abstract of the 215th ECS Meeting. Copyright © Electrochemical Society. | - |
dc.title | Electrochemica Co-generation of Ozone and Hydrogen Peroxidel | - |
dc.type | Conference_Paper | - |
dc.identifier.email | Chan, GKY: hrsccky@hku.hk | - |
dc.identifier.authority | Chan, GKY=rp00662 | - |
dc.description.nature | link_to_OA_fulltext | - |
dc.identifier.hkuros | 180330 | - |
dc.identifier.spage | Abstract no. 1021 | - |
dc.identifier.epage | Abstract no. 1021 | - |
dc.publisher.place | San Francisco, CA | - |