Spin Manipulation of Heterogeneous Molecular Electrocatalysts by an Integrated Magnetic Field for Efficient Oxygen Redox Reactions
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 2408461 |
Journal / Publication | Advanced Materials |
Volume | 36 |
Issue number | 45 |
Online published | 17 Sept 2024 |
Publication status | Published - 7 Nov 2024 |
Link(s)
DOI | DOI |
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Attachment(s) | Documents
Publisher's Copyright Statement
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85204007354&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(578e0cd9-3eb1-4653-b76c-f110efe9ea1a).html |
Abstract
Understanding the spin-dependent activity of nitrogen-coordinated single metal atom (M-N-C) electrocatalysts for oxygen reduction and evolution reactions (ORR and OER) remains challenging due to the lack of structure-defined catalysts and effective spin manipulation tools. Herein, both challenges using a magnetic field integrated heterogeneous molecular electrocatalyst prepared by anchoring cobalt phthalocyanine (CoPc) deposited carbon black on polymer-protected magnet nanoparticles, are addressed. The built-in magnetic field can shift the Co center from low- to high-spin (HS) state without atomic structure modification, affording one-order higher turnover frequency, a 50% increased H2O2 selectivity for ORR, and a ≈4000% magnetocurrent enhancement for OER. This catalyst can significantly minimize magnet usage, enabling safe and continuous production of a pure H2O2 solution for 100 h from a 100 cm2 electrolyzer. The new strategy demonstrated here also applies to other metal phthalocyanine-based catalysts, offering a universal platform for studying spin-related electrochemical processes. © 2024 The Author(s). Advanced Materials published by Wiley-VCH GmbH.
Research Area(s)
- heterogeneous molecular catalysts, magnetic enhancement, oxygen evolution reaction (OER), oxygen reduction reaction (ORR), spintronics
Citation Format(s)
Spin Manipulation of Heterogeneous Molecular Electrocatalysts by an Integrated Magnetic Field for Efficient Oxygen Redox Reactions. / Yu, Zixun; Zhang, Di; Wang, Yangyang et al.
In: Advanced Materials, Vol. 36, No. 45, 2408461, 07.11.2024.
In: Advanced Materials, Vol. 36, No. 45, 2408461, 07.11.2024.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review