Abstrakti
Co-based catalysts are promising alternatives to precious metals for the selective and effective oxidation of 5-hydroxymethylfurfural (HMF) to the higher value-added 2,5-furandicarboxylic acid (FDCA). However, these catalysts still suffer from unsatisfactory activity and poor selectivity. A series of N-doped carbon-supported Co-based dual-metal nanoparticles (NPs) have been designed, among which the Co-Cu1.4-CNx exhibits enhanced HMF oxidative activity, achieving FDCA formation rates 4 times higher than that of pristine Co-CNx, with 100% FDCA selectivity. Density functional theory (DFT) calculations evidenced that the increased electron density on Co sites induced by Cu can mediate the positive electronegativity offset to downshift the d-band center of Co-Cu1.4-CNx, thus reducing the energy barriers for the conversion of HMF to FDCA. Such findings will support the development of superior non-precious metal catalysts for HMF oxidation. [Figure not available: see fulltext.]
Alkuperäiskieli | Englanti |
---|---|
Sivut | 6670-6678 |
Sivumäärä | 9 |
Julkaisu | Nano Research |
Vuosikerta | 16 |
Numero | 5 |
DOI - pysyväislinkit | |
Tila | Julkaistu - toukok. 2023 |
OKM-julkaisutyyppi | A1 Julkaistu artikkeli, soviteltu |