Cargando…
Electrosynthesis of >20 g/L H(2)O(2) from Air
[Image: see text] Hydrogen peroxide (HP) production via electrochemical oxygen reduction reaction (ORR-HP) is a critical reaction for energy storage and environmental remediation. The onsite production of high-concentration H(2)O(2) using gas diffusion electrodes (GDEs) fed by air is especially attr...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
|
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8845047/ https://www.ncbi.nlm.nih.gov/pubmed/35178529 http://dx.doi.org/10.1021/acsestengg.1c00366 |
_version_ | 1784651595381735424 |
---|---|
author | Li, Huihui Quispe-Cardenas, Estefanny Yang, Shasha Yin, Lifeng Yang, Yang |
author_facet | Li, Huihui Quispe-Cardenas, Estefanny Yang, Shasha Yin, Lifeng Yang, Yang |
author_sort | Li, Huihui |
collection | PubMed |
description | [Image: see text] Hydrogen peroxide (HP) production via electrochemical oxygen reduction reaction (ORR-HP) is a critical reaction for energy storage and environmental remediation. The onsite production of high-concentration H(2)O(2) using gas diffusion electrodes (GDEs) fed by air is especially attractive. However, many studies indicate that the air–GDE combination could not produce concentrated H(2)O(2), as the [H(2)O(2)] leveled off or even decreased with the increasing reaction time. This study proves that the limiting factors are not the oxygen concentration in the air but the anodic and cathodic depletion of the as-formed H(2)O(2). We proved that the anodic depletion could be excluded by adopting a divided electrolytic cell. Furthermore, we demonstrated that applying poly(tetrafluoroethylene) (PTFE) as an overcoating rather than a catalyst binder could effectively mitigate the cathodic decomposition pathways. Beyond that, we further developed a composite electrospun PTFE (E-PTFE)/carbon black (CB)/GDE electrode featuring the electrospun PTFE (E-PTFE) nanofibrous overcoating. The E-PTFE coating provides abundant triphase active sites and excludes the cathodic depletion reaction, enabling the production of >20 g/L H(2)O(2) at a current efficiency of 86.6%. Finally, we demonstrated the efficacy of the ORR-HP device in lake water remediation. Cyanobacteria and microcystin-LR were readily removed along with the onsite production of H(2)O(2). |
format | Online Article Text |
id | pubmed-8845047 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-88450472022-02-15 Electrosynthesis of >20 g/L H(2)O(2) from Air Li, Huihui Quispe-Cardenas, Estefanny Yang, Shasha Yin, Lifeng Yang, Yang ACS ES T Eng [Image: see text] Hydrogen peroxide (HP) production via electrochemical oxygen reduction reaction (ORR-HP) is a critical reaction for energy storage and environmental remediation. The onsite production of high-concentration H(2)O(2) using gas diffusion electrodes (GDEs) fed by air is especially attractive. However, many studies indicate that the air–GDE combination could not produce concentrated H(2)O(2), as the [H(2)O(2)] leveled off or even decreased with the increasing reaction time. This study proves that the limiting factors are not the oxygen concentration in the air but the anodic and cathodic depletion of the as-formed H(2)O(2). We proved that the anodic depletion could be excluded by adopting a divided electrolytic cell. Furthermore, we demonstrated that applying poly(tetrafluoroethylene) (PTFE) as an overcoating rather than a catalyst binder could effectively mitigate the cathodic decomposition pathways. Beyond that, we further developed a composite electrospun PTFE (E-PTFE)/carbon black (CB)/GDE electrode featuring the electrospun PTFE (E-PTFE) nanofibrous overcoating. The E-PTFE coating provides abundant triphase active sites and excludes the cathodic depletion reaction, enabling the production of >20 g/L H(2)O(2) at a current efficiency of 86.6%. Finally, we demonstrated the efficacy of the ORR-HP device in lake water remediation. Cyanobacteria and microcystin-LR were readily removed along with the onsite production of H(2)O(2). American Chemical Society 2021-12-14 2022-02-11 /pmc/articles/PMC8845047/ /pubmed/35178529 http://dx.doi.org/10.1021/acsestengg.1c00366 Text en © 2021 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Li, Huihui Quispe-Cardenas, Estefanny Yang, Shasha Yin, Lifeng Yang, Yang Electrosynthesis of >20 g/L H(2)O(2) from Air |
title | Electrosynthesis of >20 g/L H(2)O(2) from Air |
title_full | Electrosynthesis of >20 g/L H(2)O(2) from Air |
title_fullStr | Electrosynthesis of >20 g/L H(2)O(2) from Air |
title_full_unstemmed | Electrosynthesis of >20 g/L H(2)O(2) from Air |
title_short | Electrosynthesis of >20 g/L H(2)O(2) from Air |
title_sort | electrosynthesis of >20 g/l h(2)o(2) from air |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8845047/ https://www.ncbi.nlm.nih.gov/pubmed/35178529 http://dx.doi.org/10.1021/acsestengg.1c00366 |
work_keys_str_mv | AT lihuihui electrosynthesisof20glh2o2fromair AT quispecardenasestefanny electrosynthesisof20glh2o2fromair AT yangshasha electrosynthesisof20glh2o2fromair AT yinlifeng electrosynthesisof20glh2o2fromair AT yangyang electrosynthesisof20glh2o2fromair |