Yu, J., Yong, X. orcid.org/0000-0003-1674-754X and Lu, S. orcid.org/0000-0003-4538-7846 (2024) p‐d orbital hybridization engineered single‐atom catalyst for electrocatalytic ammonia synthesis. Energy & Environmental Materials, 7 (2). e12587. ISSN 2575-0356
Abstract
The rational design of metal single-atom catalysts (SACs) for electrochemical nitrogen reduction reaction (NRR) is challenging. Two-dimensional metal–organic frameworks (2DMOFs) is a unique class of promising SACs. Up to now, the roles of individual metals, coordination atoms, and their synergy effect on the electroanalytic performance remain unclear. Therefore, in this work, a series of 2DMOFs with different metals and coordinating atoms are systematically investigated as electrocatalysts for ammonia synthesis using density functional theory calculations. For a specific metal, a proper metal-intermediate atoms p-d orbital hybridization interaction strength is found to be a key indicator for their NRR catalytic activities. The hybridization interaction strength can be quantitatively described with the p−/d- band center energy difference (∆d-p), which is found to be a sufficient descriptor for both the p-d hybridization strength and the NRR performance. The maximum free energy change (ΔGmax) and ∆d-p have a volcanic relationship with OsC4(Se)4 located at the apex of the volcanic curve, showing the best NRR performance. The asymmetrical coordination environment could regulate the band structure subtly in terms of band overlap and positions. This work may shed new light on the application of orbital engineering in electrocatalytic NRR activity and especially promotes the rational design for SACs.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 The Authors. Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University. This is an open access article under the terms of the Creative Commons Attribution License (CC BY), which permits use, distribution and reproduction in any medium, provided the original work is properly cited (https://creativecommons.org/licenses/by/4.0/). |
Keywords: | first-principle calculations; Nitrogen reduction; p-d orbital hybridization; single-atom catalysts |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 21 Mar 2023 15:11 |
Last Modified: | 01 Oct 2024 14:28 |
Published Version: | http://dx.doi.org/10.1002/eem2.12587 |
Status: | Published |
Publisher: | Wiley |
Refereed: | Yes |
Identification Number: | 10.1002/eem2.12587 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:197525 |