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  1. Thesis ; Online: Einfluss von Elektrodenparametern und Cu-Metall-Katalysatoren auf die Elektrochemische CO2-Reduktion an Gasdiffusionselektroden

    Jaster, Theresa

    2023  

    Abstract: Technologien zur stofflichen CO2-Abscheidung und -Nutzung gewinnen zunehmend an Bedeutung, um den Klimawandel zu verlangsamen. Die elektrochemische Umwandlung von CO2 in Wertprodukte ermöglicht nicht nur die chemische Speicherung regenerativer Energie, ... ...

    Abstract Technologien zur stofflichen CO2-Abscheidung und -Nutzung gewinnen zunehmend an Bedeutung, um den Klimawandel zu verlangsamen. Die elektrochemische Umwandlung von CO2 in Wertprodukte ermöglicht nicht nur die chemische Speicherung regenerativer Energie, sondern auch die Nutzung dieser Produkte als Grundstoffe in der chemischen Industrie. In dieser Arbeit wurden Cu-Zn-Ruß-Katalysatoren für Gasdiffusionselektroden (GDEs) entwickelt und die GDEs durch Variation der Herstellungsparameter optimiert. Die Metallbeladung der Katalysatoren zeigte bei 17,5 wt% ein Optimum für die Bildung von Multikohlenstoffprodukten mit Faraday-Effizienzen von 17% bzw. 31% für Ethanol und Ethylen bei 200 mA cm-2 in der CO2-Elektrolyse. Andere Katalysatoren, einschließlich Cu-In, Cu-Ag, Cu-Ni und Cu-Co, wurden in den GDEs untersucht, wobei der Cu-In-Katalysator eine FE von bis zu 37% für HCOOH bei 200 mA cm-2 erreichte. Cu-Ag-Katalysatoren zeigten FEs von bis zu 43% (50 mA cm-2) bzw. 39% (200 mA cm-2) für CO. Trimetallische Katalysatoren (Cu-Ag-In, Cu-Zn-In, Cu-Ag-Zn) zeigten interessante Trends für die CO2-Reduktion, insbesondere in Hinblick auf eine erhöhte CH4-Bildung durch Cu-Ag-In- und Cu-Zn-In-Katalysatoren im Vergleich zu Cu-Ag- und Cu-Zn-Katalysatoren.
    Subject code 660
    Language German
    Publisher Karl Maria Laufen
    Publishing country de
    Document type Thesis ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Electrochemical CO

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

    iScience

    2022  Volume 25, Issue 4, Page(s) 104011

    Abstract: For the efficient electrochemical conversion of ... ...

    Abstract For the efficient electrochemical conversion of CO
    Language English
    Publishing date 2022-03-04
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 2589-0042
    ISSN (online) 2589-0042
    DOI 10.1016/j.isci.2022.104011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  3. Article ; Online: Electrochemical CO

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

    iScience

    2022  Volume 25, Issue 4, Page(s) 104010

    Abstract: Tackling climate change is one of the undoubtedly most important challenges at the present time. This review deals mainly with the chemical aspects of the current status for converting the greenhouse gas ... ...

    Abstract Tackling climate change is one of the undoubtedly most important challenges at the present time. This review deals mainly with the chemical aspects of the current status for converting the greenhouse gas CO
    Language English
    Publishing date 2022-03-03
    Publishing country United States
    Document type Journal Article ; Review
    ISSN 2589-0042
    ISSN (online) 2589-0042
    DOI 10.1016/j.isci.2022.104010
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  4. Article ; Online: Enhancement of CO2RR product formation on Cu-ZnO-based electrodes by varying ink formulation and post treatment methods

    Jaster, Theresa / Albers, Simon / Leonhard, Armin / Kräenbring, Mena-Alexander / Lohmann, Heiko / Zeidler-Fandrich, Barbara / Özcan, Fatih / Segets, Doris / Apfel, Ulf-Peter

    2023  

    Abstract: 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 ... ...

    Abstract 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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    Subject code 660
    Language English
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Book ; Online: Electrochemical CO2 Reduction - The Macroscopic World of Electrode Design, Reactor Concepts & Economic Aspects

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

    2022  

    Abstract: Art. 104011, 36 S. ... For the efficient electrochemical conversion of CO2 into valuable chemical feedstocks, a well-coordinated interaction of all electrolyzer compartments is required. In addition to the catalyst, whose role is described in detail in the ...

    Abstract Art. 104011, 36 S.

    For the efficient electrochemical conversion of CO2 into valuable chemical feedstocks, a well-coordinated interaction of all electrolyzer compartments is required. In addition to the catalyst, whose role is described in detail in the part ""Electrochemical CO2 Reduction towards Multicarbon Alcohols - The Microscopic World of Catalysts & Process Conditions"" of this divided review, the general cell setups, design, and manufacture of the electrodes, membranes used, and process parameters must be optimally matched. The authors' goal is to provide a comprehensive review of the current literature on how these aspects affect the overall performance of CO2 electrolysis. To be economically competitive as an overall process, the framework conditions, i.e., CO2 supply and reaction product treatment, must also be considered. If the key indicators for current density, selectivity, cell voltage, and lifetime of a CO2 electrolyzer mentioned in the techno-economic consideration of this review are met, electrochemical CO2 reduction can make a valuable contribution to the creation of closed carbon cycles and to a sustainable energy economy.

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    Nr.4
    Keywords membrane ; CO2 reduction ; process
    Subject code 660
    Language English
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

    Kategorien

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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