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Nanomaterials-Based Electrodes for Electrochemical CO2 Reduction and Oxygen Evolution Reaction: from Catalyst Development to Scaling Up
Electrochemical conversion of CO2 into fuels and chemicals offers a pathway to decarbonized industrial processes that are difficult to abate with electricity alone, relying on critical factors like electrocatalytic activity, selectivity, reaction kinetics, and stability. This thesis introduces catalyst materials and systematic approaches to advance electrochemical CO2 reduction reaction (eCO2RR) technologies and syngas (CO+H2) production, offering solutions to environmental and energy-related challenges. Initially, we developed a CuOx/Cu/C-based electrocatalyst via pyrolysis and investigated the impact of various pyrolysis atmospheres on the catalyst's structure and electrocatalytic performance. Correlation between their structure and selectivity revealed that the most active catalyst towards eCO2RR was obtained through pyrolysis in an oxidative environment. The electrode structure was optimized to mitigate electrowetting by mixing the catalyst with polytetrafluoroethylene, favouring eCO2RR. Prolonged electrolysis at current densities (>-200 mA cm-2) demonstrated a relatively constant ethylene production with a 50% selectivity for two hours. Further, to exploit the inherent characteristics of the electrolysis process, where CO2 reduction and H2 evolution reactions can be combined, we developed an electrocatalyst based on transition metal oxide supported on metal-nitrogen-doped carbon MOx/M-N-Cs (M = Fe) via one-step pyrolysis to directly generate suitable syngas, e.g., for the Fischer-Tropsch process. The FeOx/Fe-N-C catalyst embedded in gas diffusion electrodes with optimized hydrophobicity produced industrially relevant syngas compositions at current densities between -20 and -150 mA cm-2, highlighting the potential for industrial-scale syngas production. Scaling up prospective catalyst materials for industrial applications remains a challenge. In the subsequent part of this thesis, we examined the applicability of the CO2 reduction results obtained on an Ag-based gas diffusion electrode in a ...
Nanomaterials-Based Electrodes for Electrochemical CO2 Reduction and Oxygen Evolution Reaction: from Catalyst Development to Scaling Up
Electrochemical conversion of CO2 into fuels and chemicals offers a pathway to decarbonized industrial processes that are difficult to abate with electricity alone, relying on critical factors like electrocatalytic activity, selectivity, reaction kinetics, and stability. This thesis introduces catalyst materials and systematic approaches to advance electrochemical CO2 reduction reaction (eCO2RR) technologies and syngas (CO+H2) production, offering solutions to environmental and energy-related challenges. Initially, we developed a CuOx/Cu/C-based electrocatalyst via pyrolysis and investigated the impact of various pyrolysis atmospheres on the catalyst's structure and electrocatalytic performance. Correlation between their structure and selectivity revealed that the most active catalyst towards eCO2RR was obtained through pyrolysis in an oxidative environment. The electrode structure was optimized to mitigate electrowetting by mixing the catalyst with polytetrafluoroethylene, favouring eCO2RR. Prolonged electrolysis at current densities (>-200 mA cm-2) demonstrated a relatively constant ethylene production with a 50% selectivity for two hours. Further, to exploit the inherent characteristics of the electrolysis process, where CO2 reduction and H2 evolution reactions can be combined, we developed an electrocatalyst based on transition metal oxide supported on metal-nitrogen-doped carbon MOx/M-N-Cs (M = Fe) via one-step pyrolysis to directly generate suitable syngas, e.g., for the Fischer-Tropsch process. The FeOx/Fe-N-C catalyst embedded in gas diffusion electrodes with optimized hydrophobicity produced industrially relevant syngas compositions at current densities between -20 and -150 mA cm-2, highlighting the potential for industrial-scale syngas production. Scaling up prospective catalyst materials for industrial applications remains a challenge. In the subsequent part of this thesis, we examined the applicability of the CO2 reduction results obtained on an Ag-based gas diffusion electrode in a ...
Nanomaterials-Based Electrodes for Electrochemical CO2 Reduction and Oxygen Evolution Reaction: from Catalyst Development to Scaling Up
Chanda, Vimanshu (Autor:in) / Andronescu, Corina
01.03.2024
Hochschulschrift
Elektronische Ressource
Englisch
| British Library Online Contents | 2017
| Wiley | 2018
| British Library Online Contents | 2017
Tangerine peel-derived carbon supported manganese oxides catalyst for oxygen reduction reaction
| British Library Online Contents | 2018