| Téléchargement | - Voir la version finale : Gold nanocrystals and conjugated polymer-wrapped single-walled carbon nanotube composites for catalyzing CO₂ electroreduction (PDF, 6.1 Mio)
- Voir les données supplémentaires : Gold nanocrystals and conjugated polymer-wrapped single-walled carbon nanotube composites for catalyzing CO₂ electroreduction (PDF, 2.5 Mio)
|
|---|
| Auteur | Rechercher : Li, Yueying1; Rechercher : Dang, Ngoc Kim; Rechercher : Gao, Guorui; Rechercher : Shin, Homin1Identifiant ORCID : https://orcid.org/0000-0001-9300-6898; Rechercher : Sharma, Shriya; Rechercher : Wu, Xiaohua1Identifiant ORCID : https://orcid.org/0000-0002-4206-0103; Rechercher : Kodra, Oltion2; Rechercher : Zborowski, Andre2; Rechercher : Malenfant, Patrick R. L.1Identifiant ORCID : https://orcid.org/0000-0001-5391-2300; Rechercher : Ding, Jianfu1Identifiant ORCID : https://orcid.org/0000-0003-2440-0968; Rechercher : Dinh, Cao-Thang; Rechercher : Ouyang, Jianying1Identifiant ORCID : https://orcid.org/0000-0001-5700-9506 |
|---|
| Affiliation | - Conseil national de recherches du Canada. Quantique et nanotechnologies
- Conseil national de recherches du Canada. Innovations dans les énergies propres
|
|---|
| Format | Texte, Article |
|---|
| Sujet | Au nanocrystals; SWCNTs; bipyridine; in situ reduction; electrochemical CO₂ reduction; high mass activity |
|---|
| Résumé | Metal nanocrystals (NCs) have been synthesized and used as highly efficient electrocatalysts for the electrocatalytic CO₂ reduction reaction (eCO₂RR) in recent years. Electrocatalysts with various metal sizes and morphologies have achieved remarkable improvement in the CO₂ reduction. However, the syntheses are typically energy-demanding and the catalysts exhibit low mass activity. Ultrasmall metal NCs synthesized by a one-step process at room temperature and an ambient environment stand out because of cost-effectiveness in materials and energy. Here, we report a facile synthesis to produce 1 nm gold nanocrystals in ambient conditions, which was realized by an in situ reduction of AuCl₃ on a semiconducting single-walled carbon nanotube (sc-SWCNT) surface. In addition, the bipyridine (BPy) units in tube-wrapped polymers function as chelating sites for anchoring Au3+ and AuNCs. The ultrasmall size of AuNCs was achieved by fast AuCl₃ diffusion and the anchoring function of BPy units. A slow diffusion or absence of BPy units resulted in AuNCs in larger sizes. The NC density was controlled by AuCl₃ feed amounts by varying the Au-to-BPy molar ratios. Density functional theory was applied to simulate the Au-BPy coordination. The fabricated nanocomposites exhibited a high Faradaic CO selectivity up to 86% at 25 mA/cm² and a high mass activity up to 5.61 A/mg (Au) at 100 mA/cm², which is the highest value reported so far in AuNC electrocatalysts for CO₂ reduction. |
|---|
| Date de publication | 2025-04-18 |
|---|
| Maison d’édition | American Chemical Society |
|---|
| Licence | |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Sous presse | Oui |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Identificateur | 10.1021/acsanm.5c01797 |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | 14531f51-424d-41ba-8c8d-9a078dce26ea |
|---|
| Enregistrement créé | 2025-04-30 |
|---|
| Enregistrement modifié | 2025-04-30 |
|---|
