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Zhu, Jian ; Li, Guangchao ; Rokicińska, Anna ; Wang, Zhenyu ; Kuśtrowski, Piotr ; Lu, Zhouguang ; Das, Shoubhik ; Cool, Pegie:
Strategic Modulation of CO Intermediate Desorption Dynamics on Bimetallic NiₓCuᵧ@NC Catalyst : Synergistic Electrocatalysis for Sustainable CO₂ Conversion.
In: Small.
(2025)
.
- 2505306.
ISSN 1613-6829
DOI: https://doi.org/10.1002/smll.202505306
Abstract
Bimetallic catalysts are appealing for electrochemical CO2 reduction reaction (ECO2RR), yet the introduction of bimetallic sites leads to an incomprehensive understanding of the metal atom interaction and catalytic mechanism. In this study, a series of bimetallic NixCuy@NC catalysts with varied Ni to Cu weight ratios are prepared. The as-prepared Ni2Cu1@NC catalyst shows high carbon monoxide (CO) Faradaic efficiencies (FECO) over 90% in a broad potential range of −0.7 to −1.1 V (vs reversible hydrogen electrode (RHE)) with an exceptional durability of CO selectivity over 80% and a high partial current density of −44 mA cm−2 at an extremely high potential of −1.3 V (vs RHE). The distinguished CO selectivity and activity are primarily attributed to the integration of Ni and Cu, which lowers the d-band center position and reconstructs the electronic structure according to the valence band spectra. More specifically, the downshifted d-band center position weakens the interaction strength with the *CO intermediate on the Ni2Cu1@NC catalyst's surface during the ECO2RR process, resulting in fast *CO desorption and high CO selectivity. This study provides researchers with a new insight for designing and optimizing the electrocatalysts for ECO2RR.
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: | 13 Jun 2025 11:04 |
| Letzte Änderung: | 13 Jun 2025 11:04 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/93921 |