Correlation between pore size and reactivity of macro/mesoporous iron and copper hexacyanoferrates for H2O2 electrocatalysis
The effect of pore size to H2O2 detection by macroporous and mesoporous Prussian blue type electrocatalysts is reported in the present paper. The macroporous electrocatalysts were prepared employing spherical colloidal particles of different sizes (300, 460, 600 and 800 nm) as sacrificial templates...
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2013
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_15726657_v706_n_p48_Goncales https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_15726657_v706_n_p48_Goncales_oai |
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I28-R145-paper_15726657_v706_n_p48_Goncales_oai2024-08-16 Gonçales, V.R. Gaitán, M.H. Bragatto, A.D.O.P. Soler-Illia, G.J.A.A. Baraldo, L.M. Córdoba De Torresi, S.I. 2013 The effect of pore size to H2O2 detection by macroporous and mesoporous Prussian blue type electrocatalysts is reported in the present paper. The macroporous electrocatalysts were prepared employing spherical colloidal particles of different sizes (300, 460, 600 and 800 nm) as sacrificial templates to synthesize a copper hexacyanoferrate/polypyrrole (CuHCNFe/Ppy) hybrid material. Surprisingly, macroporous and non-porous CuHCNFe/Ppy displayed very similar results, which led to a discussion that application of macroporous platforms in sensors must consider the material wettability and the influence of electrochemical kinetics on analyte detection. In order to evaluate the effect of smaller pores, the performance of the macroporous H2O2 sensors was also compared to electrocatalysts synthesised through the immobilization of Prussian blue and CuHCNFe layers inside the cavities of mesoporous TiO2 films with diameters of 13, 20 and 40 nm. In this scale, the results were superior than those achieved with the non-porous sensors, demonstrating the possibility of controlling the performance of H2O2 sensors according to the pore diameter and the amount of immobilized material. Among the tested porous materials, the H2O2 sensor with better performance was achieved using the 20-nm diameter TiO2 platform functionalized with Prussian blue, which presented a sensitivity of (930 ± 50) μA cm-2 mmol-1 L, detection limit of (0.49 ± 0.08) μmol L-1, response time of (6 ± 2) seconds and linear range up to (1.3 ± 0.1) mmol L-1. This performance was extremely satisfactory considering sensors operating by chronoamperometry. © 2013 Elsevier Ltd. All rights reserved. Fil:Soler-Illia, G.J.A.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Baraldo, L.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. application/pdf http://hdl.handle.net/20.500.12110/paper_15726657_v706_n_p48_Goncales info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar J Electroanal Chem 2013;706:48-54 Copper hexacyanoferrate Hydrogen peroxide Polypyrrole Porous Prussian blue Template Chronoamperometry Complexation Copper Electrocatalysis Electrocatalysts Electrolysis Hybrid materials Hydrogen peroxide Intermetallics Polypyrroles Pore size Porous materials Titanium dioxide Better performance Copper hexacyanoferrate Electrochemical kinetics Porous Prussian blue Sacrificial templates Spherical colloidal particles Template Sensors Correlation between pore size and reactivity of macro/mesoporous iron and copper hexacyanoferrates for H2O2 electrocatalysis info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_15726657_v706_n_p48_Goncales_oai |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-145 |
| collection |
Repositorio Digital de la Universidad de Buenos Aires (UBA) |
| topic |
Copper hexacyanoferrate Hydrogen peroxide Polypyrrole Porous Prussian blue Template Chronoamperometry Complexation Copper Electrocatalysis Electrocatalysts Electrolysis Hybrid materials Hydrogen peroxide Intermetallics Polypyrroles Pore size Porous materials Titanium dioxide Better performance Copper hexacyanoferrate Electrochemical kinetics Porous Prussian blue Sacrificial templates Spherical colloidal particles Template Sensors |
| spellingShingle |
Copper hexacyanoferrate Hydrogen peroxide Polypyrrole Porous Prussian blue Template Chronoamperometry Complexation Copper Electrocatalysis Electrocatalysts Electrolysis Hybrid materials Hydrogen peroxide Intermetallics Polypyrroles Pore size Porous materials Titanium dioxide Better performance Copper hexacyanoferrate Electrochemical kinetics Porous Prussian blue Sacrificial templates Spherical colloidal particles Template Sensors Gonçales, V.R. Gaitán, M.H. Bragatto, A.D.O.P. Soler-Illia, G.J.A.A. Baraldo, L.M. Córdoba De Torresi, S.I. Correlation between pore size and reactivity of macro/mesoporous iron and copper hexacyanoferrates for H2O2 electrocatalysis |
| topic_facet |
Copper hexacyanoferrate Hydrogen peroxide Polypyrrole Porous Prussian blue Template Chronoamperometry Complexation Copper Electrocatalysis Electrocatalysts Electrolysis Hybrid materials Hydrogen peroxide Intermetallics Polypyrroles Pore size Porous materials Titanium dioxide Better performance Copper hexacyanoferrate Electrochemical kinetics Porous Prussian blue Sacrificial templates Spherical colloidal particles Template Sensors |
| description |
The effect of pore size to H2O2 detection by macroporous and mesoporous Prussian blue type electrocatalysts is reported in the present paper. The macroporous electrocatalysts were prepared employing spherical colloidal particles of different sizes (300, 460, 600 and 800 nm) as sacrificial templates to synthesize a copper hexacyanoferrate/polypyrrole (CuHCNFe/Ppy) hybrid material. Surprisingly, macroporous and non-porous CuHCNFe/Ppy displayed very similar results, which led to a discussion that application of macroporous platforms in sensors must consider the material wettability and the influence of electrochemical kinetics on analyte detection. In order to evaluate the effect of smaller pores, the performance of the macroporous H2O2 sensors was also compared to electrocatalysts synthesised through the immobilization of Prussian blue and CuHCNFe layers inside the cavities of mesoporous TiO2 films with diameters of 13, 20 and 40 nm. In this scale, the results were superior than those achieved with the non-porous sensors, demonstrating the possibility of controlling the performance of H2O2 sensors according to the pore diameter and the amount of immobilized material. Among the tested porous materials, the H2O2 sensor with better performance was achieved using the 20-nm diameter TiO2 platform functionalized with Prussian blue, which presented a sensitivity of (930 ± 50) μA cm-2 mmol-1 L, detection limit of (0.49 ± 0.08) μmol L-1, response time of (6 ± 2) seconds and linear range up to (1.3 ± 0.1) mmol L-1. This performance was extremely satisfactory considering sensors operating by chronoamperometry. © 2013 Elsevier Ltd. All rights reserved. |
| format |
Artículo Artículo publishedVersion |
| author |
Gonçales, V.R. Gaitán, M.H. Bragatto, A.D.O.P. Soler-Illia, G.J.A.A. Baraldo, L.M. Córdoba De Torresi, S.I. |
| author_facet |
Gonçales, V.R. Gaitán, M.H. Bragatto, A.D.O.P. Soler-Illia, G.J.A.A. Baraldo, L.M. Córdoba De Torresi, S.I. |
| author_sort |
Gonçales, V.R. |
| title |
Correlation between pore size and reactivity of macro/mesoporous iron and copper hexacyanoferrates for H2O2 electrocatalysis |
| title_short |
Correlation between pore size and reactivity of macro/mesoporous iron and copper hexacyanoferrates for H2O2 electrocatalysis |
| title_full |
Correlation between pore size and reactivity of macro/mesoporous iron and copper hexacyanoferrates for H2O2 electrocatalysis |
| title_fullStr |
Correlation between pore size and reactivity of macro/mesoporous iron and copper hexacyanoferrates for H2O2 electrocatalysis |
| title_full_unstemmed |
Correlation between pore size and reactivity of macro/mesoporous iron and copper hexacyanoferrates for H2O2 electrocatalysis |
| title_sort |
correlation between pore size and reactivity of macro/mesoporous iron and copper hexacyanoferrates for h2o2 electrocatalysis |
| publishDate |
2013 |
| url |
http://hdl.handle.net/20.500.12110/paper_15726657_v706_n_p48_Goncales https://repositoriouba.sisbi.uba.ar/gsdl/cgi-bin/library.cgi?a=d&c=artiaex&d=paper_15726657_v706_n_p48_Goncales_oai |
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