Microwaves reveal the nanoscale ion intercalation and edge activity of 2D catalyst
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866929546961354752 |
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| author | Awadein, Mohamed Kumar, Abhishek Wang, Yuqing Dong, Mingdong Müllegger, Stefan Gramse, Georg |
| author_facet | Awadein, Mohamed Kumar, Abhishek Wang, Yuqing Dong, Mingdong Müllegger, Stefan Gramse, Georg |
| contents | The accelerated demand for electrochemical energy storage urges the need for new, sustainable, stable and lightweight materials able to store high energy densities rapidly and efficiently. Development of these functional materials requires specialized techniques that can provide a close insight into the electrochemical properties at the nanoscale. For this reason, we have introduced the electrochemical scanning microwave microscopy (EC-SMM) enabling local measurement of electrochemical properties with nanometer spatial resolution and sensitivity down to atto-Ampere electrochemical currents. The exceptional power of EC-SMM operated at radio frequency is exemplified here by the successful detection of the electrochemical activity and dynamics of molecularly thin NiCo(OH)2 flakes with a spatial resolution of 16 +/- 1 nm, uncovering the location of the active sites and providing atomistic details on the catalytic process that controls the electrocatalytic performance. Our results pinpoint the factors required to tune the thermodynamics of ion intercalation and to optimize the surface adsorption. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_12719 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Microwaves reveal the nanoscale ion intercalation and edge activity of 2D catalyst Awadein, Mohamed Kumar, Abhishek Wang, Yuqing Dong, Mingdong Müllegger, Stefan Gramse, Georg Chemical Physics The accelerated demand for electrochemical energy storage urges the need for new, sustainable, stable and lightweight materials able to store high energy densities rapidly and efficiently. Development of these functional materials requires specialized techniques that can provide a close insight into the electrochemical properties at the nanoscale. For this reason, we have introduced the electrochemical scanning microwave microscopy (EC-SMM) enabling local measurement of electrochemical properties with nanometer spatial resolution and sensitivity down to atto-Ampere electrochemical currents. The exceptional power of EC-SMM operated at radio frequency is exemplified here by the successful detection of the electrochemical activity and dynamics of molecularly thin NiCo(OH)2 flakes with a spatial resolution of 16 +/- 1 nm, uncovering the location of the active sites and providing atomistic details on the catalytic process that controls the electrocatalytic performance. Our results pinpoint the factors required to tune the thermodynamics of ion intercalation and to optimize the surface adsorption. |
| title | Microwaves reveal the nanoscale ion intercalation and edge activity of 2D catalyst |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2410.12719 |