Rational Designing Microenvironment of Gas-Diffusion Electrodes via Microgel-Augmented CO2 Availability for High-Rate and Selective CO2 Electroreduction to Ethylene
Article
| Article Title | Rational Designing Microenvironment of Gas-Diffusion Electrodes via Microgel-Augmented CO2 Availability for High-Rate and Selective CO2 Electroreduction to Ethylene |
|---|---|
| ERA Journal ID | 210044 |
| Article Category | Article |
| Authors | Rabiee, Hesamoddin, Li, Mengran, Yan, Penghui, Wu, Yuming, Zhang, Xueqin, Dorosti, Fatereh, Zhang, Xi, Ma, Beibei, Hu, Shihu, Wang, Hao, Zhu, Zhonghua and Ge, Lei |
| Journal Title | Advanced Science |
| Journal Citation | 11 (40) |
| Article Number | 2402964 |
| Number of Pages | 14 |
| Year | 2024 |
| Publisher | John Wiley & Sons |
| Place of Publication | Germany |
| ISSN | 2198-3844 |
| Digital Object Identifier (DOI) | https://doi.org/10.1002/advs.202402964 |
| Web Address (URL) | https://onlinelibrary.wiley.com/doi/10.1002/advs.202402964 |
| Abstract | Efficient electrochemical CO2 reduction reaction (CO2RR) requires advanced gas-diffusion electrodes (GDEs) with tunned microenvironment to overcome low CO2 availability in the vicinity of catalyst layer. Herein, for the first time, pyridine-containing microgels-augmented CO2 availability is presented in Cu2O-based GDE for high-rate CO2 reduction to ethylene, owing to the presence of CO2-phil microgels with amine moieties. Microgels as three-dimensional polymer networks act as CO2 micro-reservoirs to engineer the GDE microenvironment and boost local CO2 availability. The superior ethylene production performance of the GDE modified by 4-vinyl pyridine microgels, as compared with the GDE with diethylaminoethyl methacrylate microgels, indicates the bifunctional effect of pyridine-based microgels to enhance CO2 availability, and electrocatalytic CO2 reduction. While the Faradaic efficiency (FE) of ethylene without microgels was capped at 43% at 300 mA cm−2, GDE with the pyridine microgels showed 56% FE of ethylene at 700 mA cm−2. A similar trend was observed in zero-gap design, and GDEs showed 58% FE of ethylene at −4.0 cell voltage (>350 mA cm−2 current density), resulting in over 2-fold improvement in ethylene production. This study showcases the use of CO2-phil microgels for a higher rate of CO2RR-to-C2+, opening an avenue for several other microgels for more selective and efficient CO2 electrolysis. |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 400404. Electrochemical energy storage and conversion |
| Byline Affiliations | University of Southern Queensland |
| University of Melbourne | |
| University of Queensland | |
| Macquarie University |
https://research.usq.edu.au/item/z94x6/rational-designing-microenvironment-of-gas-diffusion-electrodes-via-microgel-augmented-co2-availability-for-high-rate-and-selective-co2-electroreduction-to-ethylene
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| Advanced Science - 2024 - Rabiee - Rational Designing Microenvironment of Gas‐Diffusion Electrodes via Microgel‐Augmented.pdf | ||
| License: CC BY 4.0 | ||
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