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Lignin‐Metal Supramolecular Framework Strategy of Self‐Healing Carbon‐Coated CoRu Alloy Nanocatalyst for Efficient Overall Water Splitting.
- Source :
-
Advanced Energy Materials . 8/23/2024, Vol. 14 Issue 32, p1-11. 11p. - Publication Year :
- 2024
-
Abstract
- Common precursors for carbon materials typically include petroleum‐based polymers or MOF materials. However, these materials often encounter challenges such as metal aggregation, high cost, and metals leaching. In this work, a novel of approach lignin‐metal supramolecular framework complex (MSF@Lignin) is introduced. These complexes are formed through oxidative ammonolysis of lignin (OAL) to synthesize a nitrogen‐doped carbon‐encapsulated CoRu nanocatalyst (CoRu@OALC) via in situ carbonization. CoRu@OALC exhibited exceptional performance in both HER (90 mV) and OER (200 mV) at the current density of 10 mA cm−2, with an overall water splitting voltage of 1.5 V and outstanding stability under high density. During the pyrolysis process, metal became encapsulated by lignin‐derived carbon, occurring within the temperature range of 600–700 °C. In the catalytic process, active sites are primarily located within the defects in lignin‐derived carbon, showcasing a unique "self‐healing" phenomenon within the carbon layer. Oxygen‐containing intermediates (*OH, *O, and *OOH) facilitated the reconstruction of defects on the carbon layer, while the hydrogen‐containing intermediates (*H) contributed to the reappearance of a defect‐rich structure. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CARBON-based materials
*NANOPARTICLES
*AMMONOLYSIS
*CARBONIZATION
*METALS
Subjects
Details
- Language :
- English
- ISSN :
- 16146832
- Volume :
- 14
- Issue :
- 32
- Database :
- Academic Search Index
- Journal :
- Advanced Energy Materials
- Publication Type :
- Academic Journal
- Accession number :
- 179239420
- Full Text :
- https://doi.org/10.1002/aenm.202303442