Cargando…
Copper Catalysis-Based Amperometric Microsensors for Carbon Dioxide Monitoring
[Image: see text] A fast response microsensor that can detect the distribution of CO(2) at the microscale level is essential for the observation of biophysiological activity, carbon flux, and carbon burial. Inspired by the previous success of Cu catalysis, we attempted to use this metal Cu material...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2023
|
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10688157/ https://www.ncbi.nlm.nih.gov/pubmed/38046328 http://dx.doi.org/10.1021/acsomega.3c06480 |
_version_ | 1785152124472000512 |
---|---|
author | Guo, Mengwen Xun, Yao Kang, Fuxing Revsbech, Niels Peter |
author_facet | Guo, Mengwen Xun, Yao Kang, Fuxing Revsbech, Niels Peter |
author_sort | Guo, Mengwen |
collection | PubMed |
description | [Image: see text] A fast response microsensor that can detect the distribution of CO(2) at the microscale level is essential for the observation of biophysiological activity, carbon flux, and carbon burial. Inspired by the previous success of Cu catalysis, we attempted to use this metal Cu material to develop an amperometric microsensor that can meet the requirements. Specifically, the ambient gases diffuse through a silicone membrane into a trap casing filled with an acidic CrCl(2) solution, where the otherwise interfering O(2) interferent is removed by a redox with Cr(2+). The gases then diffuse through a second silicone membrane into an electrolyte, where CO(2) is selectively reduced to methanol (CH(3)OH) at a Cu cathode through a carbon monoxide (CO) pathway. Due to the use of Cu catalysis at the WE tip, CO(2) can be reduced at a less negative polarization (−470 mV) instead of the previously reported −1200 mV, thus avoiding hydrogen-evolution interference due to water from the byproduct or from water diffusion through the silicone membrane. This moderate polarization results in a stable baseline, making the microsensor suitable for long-term monitoring. Interferences from other gases, such as N(2)O, which may be of much concern in environmental monitoring, can be ignored. Applications and limitations are also discussed with a view to further improvement in the future. |
format | Online Article Text |
id | pubmed-10688157 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-106881572023-12-01 Copper Catalysis-Based Amperometric Microsensors for Carbon Dioxide Monitoring Guo, Mengwen Xun, Yao Kang, Fuxing Revsbech, Niels Peter ACS Omega [Image: see text] A fast response microsensor that can detect the distribution of CO(2) at the microscale level is essential for the observation of biophysiological activity, carbon flux, and carbon burial. Inspired by the previous success of Cu catalysis, we attempted to use this metal Cu material to develop an amperometric microsensor that can meet the requirements. Specifically, the ambient gases diffuse through a silicone membrane into a trap casing filled with an acidic CrCl(2) solution, where the otherwise interfering O(2) interferent is removed by a redox with Cr(2+). The gases then diffuse through a second silicone membrane into an electrolyte, where CO(2) is selectively reduced to methanol (CH(3)OH) at a Cu cathode through a carbon monoxide (CO) pathway. Due to the use of Cu catalysis at the WE tip, CO(2) can be reduced at a less negative polarization (−470 mV) instead of the previously reported −1200 mV, thus avoiding hydrogen-evolution interference due to water from the byproduct or from water diffusion through the silicone membrane. This moderate polarization results in a stable baseline, making the microsensor suitable for long-term monitoring. Interferences from other gases, such as N(2)O, which may be of much concern in environmental monitoring, can be ignored. Applications and limitations are also discussed with a view to further improvement in the future. American Chemical Society 2023-11-13 /pmc/articles/PMC10688157/ /pubmed/38046328 http://dx.doi.org/10.1021/acsomega.3c06480 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Guo, Mengwen Xun, Yao Kang, Fuxing Revsbech, Niels Peter Copper Catalysis-Based Amperometric Microsensors for Carbon Dioxide Monitoring |
title | Copper Catalysis-Based
Amperometric Microsensors for
Carbon Dioxide Monitoring |
title_full | Copper Catalysis-Based
Amperometric Microsensors for
Carbon Dioxide Monitoring |
title_fullStr | Copper Catalysis-Based
Amperometric Microsensors for
Carbon Dioxide Monitoring |
title_full_unstemmed | Copper Catalysis-Based
Amperometric Microsensors for
Carbon Dioxide Monitoring |
title_short | Copper Catalysis-Based
Amperometric Microsensors for
Carbon Dioxide Monitoring |
title_sort | copper catalysis-based
amperometric microsensors for
carbon dioxide monitoring |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10688157/ https://www.ncbi.nlm.nih.gov/pubmed/38046328 http://dx.doi.org/10.1021/acsomega.3c06480 |
work_keys_str_mv | AT guomengwen coppercatalysisbasedamperometricmicrosensorsforcarbondioxidemonitoring AT xunyao coppercatalysisbasedamperometricmicrosensorsforcarbondioxidemonitoring AT kangfuxing coppercatalysisbasedamperometricmicrosensorsforcarbondioxidemonitoring AT revsbechnielspeter coppercatalysisbasedamperometricmicrosensorsforcarbondioxidemonitoring |