A Review: Scanning Electrochemical Microscopy (SECM) for Visualizing the Real-Time Local Catalytic Activity
Scanning electrochemical microscopy (SECM) is a powerful scanning probe technique for measuring the <i>in situ</i> electrochemical reactions occurring at various sample interfaces, such as the liquid-liquid, solid-liquid, and liquid-gas. The tip/probe of SECM is usually an ultramicroelec...
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| Format: | Article |
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MDPI AG
2021-05-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/11/5/594 |
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| author | Anant Preet Tzu-En Lin |
| author_facet | Anant Preet Tzu-En Lin |
| author_sort | Anant Preet |
| collection | DOAJ |
| description | Scanning electrochemical microscopy (SECM) is a powerful scanning probe technique for measuring the <i>in situ</i> electrochemical reactions occurring at various sample interfaces, such as the liquid-liquid, solid-liquid, and liquid-gas. The tip/probe of SECM is usually an ultramicroelectrode (UME) or a nanoelectrode that can move towards or over the sample of interest controlled by a precise motor positioning system. Remarkably, electrocatalysts play a crucial role in addressing the surge in global energy consumption by providing sustainable alternative energy sources. Therefore, the precise measurement of catalytic reactions offers profound insights for designing novel catalysts as well as for enhancing their performance. SECM proves to be an excellent tool for characterization and screening catalysts as the probe can rapidly scan along one direction over the sample array containing a large number of different compositions. These features make SECM more appealing than other conventional methodologies for assessing bulk solutions. SECM can be employed for investigating numerous catalytic reactions including the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER), water oxidation, glucose oxidation reaction (GOR), and CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR) with high spatial resolution. Moreover, for improving the catalyst design, several SECM modes can be applied based on the catalytic reactions under evaluation. This review aims to present a brief overview of the recent applications of electrocatalysts and their kinetics as well as catalytic sites in electrochemical reactions, such as oxygen reduction, water oxidation, and methanol oxidation. |
| first_indexed | 2024-03-10T11:42:04Z |
| format | Article |
| id | doaj.art-1550c02eca744ec5a2aa5c1c2fb74841 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T11:42:04Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-1550c02eca744ec5a2aa5c1c2fb748412023-11-21T18:21:16ZengMDPI AGCatalysts2073-43442021-05-0111559410.3390/catal11050594A Review: Scanning Electrochemical Microscopy (SECM) for Visualizing the Real-Time Local Catalytic ActivityAnant Preet0Tzu-En Lin1Institute of Biomedical Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, TaiwanInstitute of Biomedical Engineering, College of Electrical and Computer Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, TaiwanScanning electrochemical microscopy (SECM) is a powerful scanning probe technique for measuring the <i>in situ</i> electrochemical reactions occurring at various sample interfaces, such as the liquid-liquid, solid-liquid, and liquid-gas. The tip/probe of SECM is usually an ultramicroelectrode (UME) or a nanoelectrode that can move towards or over the sample of interest controlled by a precise motor positioning system. Remarkably, electrocatalysts play a crucial role in addressing the surge in global energy consumption by providing sustainable alternative energy sources. Therefore, the precise measurement of catalytic reactions offers profound insights for designing novel catalysts as well as for enhancing their performance. SECM proves to be an excellent tool for characterization and screening catalysts as the probe can rapidly scan along one direction over the sample array containing a large number of different compositions. These features make SECM more appealing than other conventional methodologies for assessing bulk solutions. SECM can be employed for investigating numerous catalytic reactions including the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), hydrogen evolution reaction (HER), water oxidation, glucose oxidation reaction (GOR), and CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR) with high spatial resolution. Moreover, for improving the catalyst design, several SECM modes can be applied based on the catalytic reactions under evaluation. This review aims to present a brief overview of the recent applications of electrocatalysts and their kinetics as well as catalytic sites in electrochemical reactions, such as oxygen reduction, water oxidation, and methanol oxidation.https://www.mdpi.com/2073-4344/11/5/594scanning electrochemical microscopyultramicroelectrodecatalystelectrocatalysis |
| spellingShingle | Anant Preet Tzu-En Lin A Review: Scanning Electrochemical Microscopy (SECM) for Visualizing the Real-Time Local Catalytic Activity Catalysts scanning electrochemical microscopy ultramicroelectrode catalyst electrocatalysis |
| title | A Review: Scanning Electrochemical Microscopy (SECM) for Visualizing the Real-Time Local Catalytic Activity |
| title_full | A Review: Scanning Electrochemical Microscopy (SECM) for Visualizing the Real-Time Local Catalytic Activity |
| title_fullStr | A Review: Scanning Electrochemical Microscopy (SECM) for Visualizing the Real-Time Local Catalytic Activity |
| title_full_unstemmed | A Review: Scanning Electrochemical Microscopy (SECM) for Visualizing the Real-Time Local Catalytic Activity |
| title_short | A Review: Scanning Electrochemical Microscopy (SECM) for Visualizing the Real-Time Local Catalytic Activity |
| title_sort | review scanning electrochemical microscopy secm for visualizing the real time local catalytic activity |
| topic | scanning electrochemical microscopy ultramicroelectrode catalyst electrocatalysis |
| url | https://www.mdpi.com/2073-4344/11/5/594 |
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