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Rabiee H, Li M, Yan P, Wu Y, Zhang X, Dorosti F, Zhang X, Ma B, Hu S, Wang H, Zhu Z, Ge L. Rational Designing Microenvironment of Gas-Diffusion Electrodes via Microgel-Augmented CO 2 Availability for High-Rate and Selective CO 2 Electroreduction to Ethylene. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2402964. [PMID: 39206751 DOI: 10.1002/advs.202402964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 06/14/2024] [Indexed: 09/04/2024]
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.
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Affiliation(s)
- Hesamoddin Rabiee
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia
- Centre for Future Materials, University of Southern Queensland, Springfield, QLD, 4300, Australia
| | - Mengran Li
- Department of Chemical Engineering, The University of Melbourne, Melbourne, VIC, 3052, Australia
| | - Penghui Yan
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Yuming Wu
- School of Engineering, Macquarie University, Sydney, NSW, 2109, Australia
| | - Xueqin Zhang
- Australian Centre for Water and Environmental Biotechnology (ACWEB), The University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Fatereh Dorosti
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Xi Zhang
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Beibei Ma
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Shihu Hu
- Australian Centre for Water and Environmental Biotechnology (ACWEB), The University of Queensland, St. Lucia, QLD, 4072, Australia
| | - Hao Wang
- Centre for Future Materials, University of Southern Queensland, Springfield, QLD, 4300, Australia
| | - Zhonghua Zhu
- School of Chemical Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Lei Ge
- Centre for Future Materials, University of Southern Queensland, Springfield, QLD, 4300, Australia
- School of Engineering, University of Southern Queensland, Springfield, QLD, 4300, Australia
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Nagasawa A, Watanabe K, Suga K, Nagao D. Independent control over sizes and surface properties of polystyrene-based particles using multiple comonomers. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2022.130376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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From Polyethyleneimine Hydrogels to Pickering-like Smart “On/Off” Emulgels Switched by pH and Temperature. J Colloid Interface Sci 2022; 628:807-819. [DOI: 10.1016/j.jcis.2022.07.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/27/2022] [Accepted: 07/28/2022] [Indexed: 11/13/2022]
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Zhang L, Zhang G, Ge J, Jiang P, Ding L. pH- and thermo-responsive Pickering emulsion stabilized by silica nanoparticles and conventional nonionic copolymer surfactants. J Colloid Interface Sci 2022; 616:129-140. [DOI: 10.1016/j.jcis.2022.02.067] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 02/11/2022] [Accepted: 02/16/2022] [Indexed: 11/30/2022]
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