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Zhu, Jian ; Hu, Jing ; Wang, Zhenyu ; Lu, Zhou-Guang ; Das, Shoubhik ; Cool, Pegie:
Design of a new Ni@NCNT/Graphene Hybrid Structured Catalyst for High-performance Electrochemical CO2 Reduction : Unravelling the Role of N-doping.
In: Chemical Science.
(2025)
.
ISSN 2041-6539
DOI: https://doi.org/10.1039/D4SC07354A
Abstract
Doping strategies have been recognized as effective approaches for developing cost-effective and durable catalysts with enhanced reactivity and selectivity in the electrochemical synthesis of value-added compounds directly from CO2. However, the reaction mechanism and the specific role of heteroatom doping, such as N doping, in advancing the CO2 reduction reaction is still very challenging based on the lack of precise control of catalyst surface microenvironments. In this study, we investigated the effects of N doping on the performances of electrochemically converting CO2 to CO over Ni@NCNT/Graphene hybrid structured catalysts (Ni@NCNT/Gr). Ni nanoparticles (Ni NPs) were encapsulated in N doped carbon nanotubes (NCNT) which were in-situ generated from g-C3N4 during the annealing process due to the thermal catalysis of the existing Ni NPs. Our results show that optimized pyrrolic N doping levels at the NCNT/Ni interface, coupled with stable NCNT/Gr hybrid structures, high electrochemical active surface area, rich abundant active sites, and reduced Ni NP size synergistically contribute to distinguished electrocatalytic performance. The as-prepared Ni@NCNT/Gr-R catalyst demonstrated a high CO Faradaic efficiency (>90%) with negligible differences in CO FEs across a wide potential range (−0.71 ~ −0.91 V vs RHE) in an H-cell while maintaining magnificent stability with negligible current density loss for 24 hours at −0.71 V (vs RHE). Our findings provide evidence and insight into the optimization of pyrrolic N doping levels together with reducing NP size within stable NCNT/Gr heterostructures for designing efficient CO2 reduction catalysts.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Organische Chemie I - Photo- und Elektrokatalyse für Nachhaltigkeit > Lehrstuhl Organische Chemie I - Photo- und Elektrokatalyse für Nachhaltigkeit - Univ.-Prof. Dr. Shoubhik Das |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Eingestellt am: | 14 Jan 2025 07:45 |
| Letzte Änderung: | 14 Jan 2025 07:45 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/91569 |