Flow-Through Hollow Fiber Gas Diffusion Electrodes with Morphology-Controlled In Situ Galvanic Grown Silver Catalysts for Enhanced CO Selectivity in CO2 Electroreduction
Article
| Article Title | Flow-Through Hollow Fiber Gas Diffusion Electrodes with Morphology-Controlled In Situ Galvanic Grown Silver Catalysts for Enhanced CO Selectivity in CO2 Electroreduction |
|---|---|
| ERA Journal ID | 212373 |
| Article Category | Article |
| Authors | Chen, Guoliang, Ma, Beibei, Kuang, Yizhu, Rabiee, Hesamoddin, Dorosti, Fatereh, Nanjundan, Ashok Kumar, Zhu, Zhonghua, Wang, Hao and Ge, Lei |
| Journal Title | Energy and Environmental Materials |
| Number of Pages | 9 |
| Year | 2026 |
| Publisher | Wiley-Blackwell |
| Place of Publication | United Kingdom |
| ISSN | 2575-0348 |
| 2575-0356 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1002/eem2.70205 |
| Web Address (URL) | https://onlinelibrary.wiley.com/doi/10.1002/eem2.70205 |
| Abstract | Electrochemical reduction of CO2 (CO2RR) into value-added products offers a promising strategy to reduce dependence on fossil fuels, particularly when powered by renewable electricity. However, CO2RR faces challenges, including high activation energy barriers, competing side reactions, and limited CO2 mass transport. Addressing these limitations requires not only the development of advanced electrocatalysts to enhance CO2RR activity but also the design of electrodes to optimize gas-catalyst-electrolyte interfaces and facilitate efficient mass transport, thereby advancing CO2RR toward industrial-scale applications. Herein, we developed flow-through hollow fiber gas diffusion electrodes (HFGDEs) featuring in situ galvanic growth of flower-like silver structures. The abundant ultrathin 2D nanosheets enhance active sites and CO2RR activity, and the resulting electrode achieves a high Faradaic efficiency of CO of 91% at −1.2 (V vs RHE). Furthermore, the HFGDE configuration ensured sufficient CO2 delivery to the active sites, enabling a partial current density of CO of 280.8 mA cm−2. In situ Raman spectroscopy revealed that the in situ-grown silver flower structure promotes the adsorption of *COOH intermediate, thereby accelerating CO2RR kinetics. Moreover, the robust CO2 supply afforded by the HFGDE configuration is crucial to suppress competitive hydrogen evolution reaction (HER) and maintain high CO2RR activity under industrially relevant current densities. |
| Contains Sensitive Content | Does not contain sensitive content |
| ANZSRC Field of Research 2020 | 400404. Electrochemical energy storage and conversion |
| 340601. Catalysis and mechanisms of reactions | |
| Byline Affiliations | Centre for Future Materials (Research) |
| University of Queensland | |
| Centre for Future Materials | |
| University of Bern, Switzerland | |
| School of Engineering |
https://research.usq.edu.au/item/100xz3/flow-through-hollow-fiber-gas-diffusion-electrodes-with-morphology-controlled-in-situ-galvanic-grown-silver-catalysts-for-enhanced-co-selectivity-in-co2-electroreduction
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| Energy Environ Materials - 2026 - Chen - Flow‐Through Hollow Fiber Gas Diffusion Electrodes with Morphology‐Controlled In.pdf | ||
| License: CC BY 4.0 | ||
| File access level: Anyone | ||
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