A Comparison of the Sensing Behavior for Pt-Mo/C-, Pt-Zr/C-, Pt-Fe-Ir/C-, and Pt/C-Modified Glassy Carbon Electrodes for the Oxidation of Ascorbic Acid and Dopamine
This study compares the sensing performance for platinum-molybdenum-, platinum-zirconium-, platinum-iron-iridium-, and platinum-modified electrodes in terms of the amperometric detection of ascorbic acid (AA) and dopamine (DA). The Pt, Pt-Mo, Pt-Zr, and Pt-Fe-Ir electrocatalysts are fabricated by ch...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Online Access: | https://www.mdpi.com/2073-4344/13/2/337 |
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| author | Yu-Ching Weng Jia-Yi Su-Chen Ting-Yu Yang Chieh-Lin Chiang |
| author_facet | Yu-Ching Weng Jia-Yi Su-Chen Ting-Yu Yang Chieh-Lin Chiang |
| author_sort | Yu-Ching Weng |
| collection | DOAJ |
| description | This study compares the sensing performance for platinum-molybdenum-, platinum-zirconium-, platinum-iron-iridium-, and platinum-modified electrodes in terms of the amperometric detection of ascorbic acid (AA) and dopamine (DA). The Pt, Pt-Mo, Pt-Zr, and Pt-Fe-Ir electrocatalysts are fabricated by chemical reduction on a carbon black support (XC-72) and are further modified on a glassy carbon electrode (GCE) as sensing electrodes. The Pt-Mo/C/GCE exhibits better electrocatalytic activity toward AA and DA than the Pt/C/GCE, Pt-Zr/C/GCE, and Pt-Fe-Ir/C/GCE. The Pt-Mo/C/GCE exhibits a sensitivity of 31.29 µA mM<sup>−1</sup> to AA at 0.3 V vs. Ag/AgCl and a sensitivity of 72.24 µA mM<sup>−1</sup> to DA at 0.6 V vs. Ag/AgCl and is reproducible and stable. This electrode has a respective limit of detection of 7.69 and 6.14 µM for AA and DA. Sucrose, citric acid, tartaric acid, and uric acid do not interfere with AA and DA detection. The diffusion coefficient and kinetic parameters, such as the catalytic rate constant and the heterogeneous rate constant for AA and DA, are determined using electrochemical approaches. |
| first_indexed | 2024-03-11T09:01:56Z |
| format | Article |
| id | doaj.art-616fd492fe174d6e896adc253d59f8d8 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-11T09:01:56Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-616fd492fe174d6e896adc253d59f8d82023-11-16T19:41:43ZengMDPI AGCatalysts2073-43442023-02-0113233710.3390/catal13020337A Comparison of the Sensing Behavior for Pt-Mo/C-, Pt-Zr/C-, Pt-Fe-Ir/C-, and Pt/C-Modified Glassy Carbon Electrodes for the Oxidation of Ascorbic Acid and DopamineYu-Ching Weng0Jia-Yi Su-Chen1Ting-Yu Yang2Chieh-Lin Chiang3Department of Chemical Engineering, Feng Chia University, Taichung 40724, TaiwanDepartment of Chemical Engineering, Feng Chia University, Taichung 40724, TaiwanDepartment of Chemical Engineering, Feng Chia University, Taichung 40724, TaiwanDepartment of Chemical Engineering, Feng Chia University, Taichung 40724, TaiwanThis study compares the sensing performance for platinum-molybdenum-, platinum-zirconium-, platinum-iron-iridium-, and platinum-modified electrodes in terms of the amperometric detection of ascorbic acid (AA) and dopamine (DA). The Pt, Pt-Mo, Pt-Zr, and Pt-Fe-Ir electrocatalysts are fabricated by chemical reduction on a carbon black support (XC-72) and are further modified on a glassy carbon electrode (GCE) as sensing electrodes. The Pt-Mo/C/GCE exhibits better electrocatalytic activity toward AA and DA than the Pt/C/GCE, Pt-Zr/C/GCE, and Pt-Fe-Ir/C/GCE. The Pt-Mo/C/GCE exhibits a sensitivity of 31.29 µA mM<sup>−1</sup> to AA at 0.3 V vs. Ag/AgCl and a sensitivity of 72.24 µA mM<sup>−1</sup> to DA at 0.6 V vs. Ag/AgCl and is reproducible and stable. This electrode has a respective limit of detection of 7.69 and 6.14 µM for AA and DA. Sucrose, citric acid, tartaric acid, and uric acid do not interfere with AA and DA detection. The diffusion coefficient and kinetic parameters, such as the catalytic rate constant and the heterogeneous rate constant for AA and DA, are determined using electrochemical approaches.https://www.mdpi.com/2073-4344/13/2/337Pt/CPt-Mo/CPt-Zr/CPt-Fe-Ir/Cascorbic aciddopamine |
| spellingShingle | Yu-Ching Weng Jia-Yi Su-Chen Ting-Yu Yang Chieh-Lin Chiang A Comparison of the Sensing Behavior for Pt-Mo/C-, Pt-Zr/C-, Pt-Fe-Ir/C-, and Pt/C-Modified Glassy Carbon Electrodes for the Oxidation of Ascorbic Acid and Dopamine Catalysts Pt/C Pt-Mo/C Pt-Zr/C Pt-Fe-Ir/C ascorbic acid dopamine |
| title | A Comparison of the Sensing Behavior for Pt-Mo/C-, Pt-Zr/C-, Pt-Fe-Ir/C-, and Pt/C-Modified Glassy Carbon Electrodes for the Oxidation of Ascorbic Acid and Dopamine |
| title_full | A Comparison of the Sensing Behavior for Pt-Mo/C-, Pt-Zr/C-, Pt-Fe-Ir/C-, and Pt/C-Modified Glassy Carbon Electrodes for the Oxidation of Ascorbic Acid and Dopamine |
| title_fullStr | A Comparison of the Sensing Behavior for Pt-Mo/C-, Pt-Zr/C-, Pt-Fe-Ir/C-, and Pt/C-Modified Glassy Carbon Electrodes for the Oxidation of Ascorbic Acid and Dopamine |
| title_full_unstemmed | A Comparison of the Sensing Behavior for Pt-Mo/C-, Pt-Zr/C-, Pt-Fe-Ir/C-, and Pt/C-Modified Glassy Carbon Electrodes for the Oxidation of Ascorbic Acid and Dopamine |
| title_short | A Comparison of the Sensing Behavior for Pt-Mo/C-, Pt-Zr/C-, Pt-Fe-Ir/C-, and Pt/C-Modified Glassy Carbon Electrodes for the Oxidation of Ascorbic Acid and Dopamine |
| title_sort | comparison of the sensing behavior for pt mo c pt zr c pt fe ir c and pt c modified glassy carbon electrodes for the oxidation of ascorbic acid and dopamine |
| topic | Pt/C Pt-Mo/C Pt-Zr/C Pt-Fe-Ir/C ascorbic acid dopamine |
| url | https://www.mdpi.com/2073-4344/13/2/337 |
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