Electrochemical CO2 reduction toward multicarbon alcohols - The microscopic world of catalysts &amp; process conditions

Jaster, Theresa; Gawel, Alina; Siegmund, Daniel; Holzmann, Johannes; Lohmann, Heiko; Klemm, Elias; Apfel, Ulf‐Peter

doi:10.1016/j.isci.2022.104010

Cited by 42 publications

(36 citation statements)

References 183 publications

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“…Currently, few materials have achieved a direct transition from homogeneous catalysis to industrially relevant gas diffusion electrodes (GDEs) [19,67]. Concretely, GDEs shorten the diffusion pathways of CO 2 to the catalytic centers compared to H-type cells involving liquid electrolytes, achieving current densities greater than 50 mA cm −2 under aqueous conditions [68]. Since Ag4 has proven pristine catalytic activity and stability towards the generation of CO 2 R products when employed homogeneously in high water content solvents, it was selected for preliminary studies on gas diffusion electrodes in a 1 M KHCO 3 electrolyte.…”

Section: Heterogeneous Electrocatalysismentioning

confidence: 99%

Tuning the Electronic Properties of Homoleptic Silver(I) bis-BIAN Complexes towards Efficient Electrocatalytic CO2 Reduction

et al. 2022

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We report herein the preparation and characterization of six readily assembled bis-coordinated homoleptic silver(I) N,N′-bis(arylimino)acenaphthene (BIAN) complexes of general structure [Ag(I)(BIAN)2]BF4 and the influence of the electronic properties of the ligand substitution pattern on their performance in electrochemical CO2 reduction (CO2R). All the explored catalysts displayed substantial current enhancements in carbon-dioxide-saturated solvents dependent on the ligated BIAN and no significant concurrent H2 evolution when utilizing 2% H2O as a proton source. Additionally, preliminary studies, employing a drop-casted ink of 0.4 mg cm−2 [Ag(I)(4-OMe-BIAN)2]BF4 (Ag4) immobilized onto carbon paper gas diffusion electrodes in a flow cell with 1M KHCO3 aqueous electrolyte, resulted in a propitious Faradaic efficiency of 51% for CO at a current density of 50 mA cm−2.

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Section: Heterogeneous Electrocatalysismentioning

confidence: 99%

Tuning the Electronic Properties of Homoleptic Silver(I) bis-BIAN Complexes towards Efficient Electrocatalytic CO2 Reduction

et al. 2022

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“…Among the large variety of reported catalysts, especially combinations of copper and zinc were shown to support the formation of C-C coupling products such as ethylene, ethanol, acetic acid, or propanol [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of CO₂RR product formation on Cu-ZnO-based electrodes by varying ink formulation and post-treatment methods

et al. 2023

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Numerous catalysts have been reported with enhanced performance, e.g. longer lifetime and improved selectivity, for the electrochemical CO2 reduction reaction (CO2RR). Respectively little is, however, known about the influence of the electrode structuring and pre-treatment on this reaction for catalytic layers. Thus, we herein report on the modification of the catalyst environment of a Cu-ZnO-carbon black catalyst by variation of the ink composition and subsequent electrode treatment before performing CO2RR. We furthermore provide insight into the impact of solvents used for the ink preparation, ionomer and additives like pore forming agents as well as post treatment steps in terms of pressing and sintering of electrodes on the CO2RR performance. Although using the same catalyst for all electrodes, remarkable differences in hydrophobicity, surface morphology and electrochemical performance with respect to stability and product distribution are observed. Our study reveals the critical role of the catalytic layer assembly aside using proper catalysts. We furthermore show that the parasitic hydrogen formation and flooding behavior can be lowered and C2+ product formation enhanced when operated in optimized gas diffusion electrodes (GDE).

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“…5 Over the Cu-CuI catalyst, the optimum partial current density of C 2+ alcohols could reach 299 mA cm −2 with a moderate selectivity of 33.4%. 6 Several catalyst design strategies have also been developed, [9][10][11] including precipitation, electrodeposition, sputtering, evaporation, defect engineering, hybridization, surface modications and reconstructions. However, the CO 2 to C 2+ alcohol electrocatalytic system still remains limited by the low productivity rates at high product selectivity, making it difficult to meet the commercial demand.…”

Section: Introductionmentioning

confidence: 99%

A crystal growth kinetics guided Cu aerogel for highly efficient CO₂electrolysis to C₂₊alcohols

Liu

et al. 2023

Chem. Sci.

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Electrochemical CO2 reduction toward multicarbon alcohols - The microscopic world of catalysts & process conditions

Cited by 42 publications

References 183 publications

Tuning the Electronic Properties of Homoleptic Silver(I) bis-BIAN Complexes towards Efficient Electrocatalytic CO2 Reduction

Tuning the Electronic Properties of Homoleptic Silver(I) bis-BIAN Complexes towards Efficient Electrocatalytic CO2 Reduction

Enhancement of CO₂RR product formation on Cu-ZnO-based electrodes by varying ink formulation and post-treatment methods

A crystal growth kinetics guided Cu aerogel for highly efficient CO₂electrolysis to C₂₊alcohols

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Electrochemical CO2 reduction toward multicarbon alcohols - The microscopic world of catalysts & process conditions

Cited by 42 publications

References 183 publications

Tuning the Electronic Properties of Homoleptic Silver(I) bis-BIAN Complexes towards Efficient Electrocatalytic CO2 Reduction

Tuning the Electronic Properties of Homoleptic Silver(I) bis-BIAN Complexes towards Efficient Electrocatalytic CO2 Reduction

Enhancement of CO2RR product formation on Cu-ZnO-based electrodes by varying ink formulation and post-treatment methods

A crystal growth kinetics guided Cu aerogel for highly efficient CO2electrolysis to C2+alcohols

Contact Info

Product

Resources

About

Enhancement of CO₂RR product formation on Cu-ZnO-based electrodes by varying ink formulation and post-treatment methods

A crystal growth kinetics guided Cu aerogel for highly efficient CO₂electrolysis to C₂₊alcohols