Electrocatalysts for environmental mitigation: Synthesis, characterization and application
Notice bibliographique
Résumé
The growing environmental crisis has strengthened interest in conversion technologies within the chemical industry, particularly in the reducing of greenhouse gases and minimizing toxic chemicals. To combat these issues, research and developmental technologies have focused on sustainable and environmentally friendly practices capable of reducing harm to humans and the environment. At the heart of these technologies is electrochemistry, which uses renewable energy sources and allows tuneable, selective, and scalable reactions. Electrochemical conversion provides a sustainable route to the production of essential fuels and commodity chemicals required globally. Due to its simplicity, electrochemistry can thus be applied to many synthetic reactions. The primary goal of this research is to contribute to the ever-growing challenge observed in energy conversion and storage by synthesizing, characterizing, analysing, and evaluating electrocatalytic materials for carbon dioxide, CO2 electrocatalysis and 4-nitrophenol, 4NP electrocatalysis. These two processes are pivotal in environmental remediation and eradication of toxic chemicals. Thus, developing a path free of fossil fuel for the production of commodity chemicals is the core of this research. Electrocatalysts consisting of metal nanoparticles (Au, Pd, Cu), metal oxide (TiO2), layered double hydroxide, LDH (NiFe, CuFe) and graphene oxide, GO were synthesized and extensively characterized. Their activity was explored and compared for electrocatalytic applications (CO2 and 4NP). All electrocatalysts synthesized in this work showed significant catalytic performance: Au/rGO being the most active for CO2 electrocatalysis in non-aqueous solvents and Pd/TiO2 the most active for 4NP electrocatalysis. Ternary catalysts (Cu-TiO2/rGO) also displayed improved catalytic activity for electrochemical reduction of carbon dioxide, ERCO2 in aqueous media. The enhanced performance of catalyst materials was linked to the synergy between the pure metals (Au, Pd, and Cu) and the multifunctional support (TiO2, rGO). This research also demonstrates the qualitative development of electrochemical analytical techniques for the selective detection of CO2 reduction product. A rotating ring-disc electrode, RRDE was used as a quick analytical tool for the detection of acetic acid, AA, a product formed during ERCO2 on the ternary Cu-TiO2/rGO catalyst. Traditional characterization techniques such as nuclear magnetic resonance, NMR spectroscopy and high-performance liquid chromatography, HPLC were further employed to confirm the detection of acetic acid. Finally, the outcome of this research demonstrate that electrochemical techniques are a promising method for detection and conversion of CO2 (and other toxic chemicals) to value added products in both academic laboratories and industries. This serves as a solid foundation in improving conversion technologies.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».