Surfactant Removal for Colloidal Nanocrystal Catalysts Mediated by N-Heterocyclic Carbenes

Autor:	Perrin Godbold, Sooyeon Hwang, Robert J. Gilliard, Grayson Johnson, Rebecca Brown, Sen Zhang, Akachukwu D. Obi
Rok vydání:	2021
Předmět:	Ligand Chemistry Protonation General Chemistry 010402 general chemistry 01 natural sciences Biochemistry Combinatorial chemistry Catalysis 0104 chemical sciences Colloid Colloid and Surface Chemistry Nanocrystal Pulmonary surfactant
Zdroj:	Journal of the American Chemical Society. 143:2644-2648
ISSN:	1520-5126 0002-7863
DOI:	10.1021/jacs.0c12278
Popis:	We report the facile removal of surfactants from colloidally synthesized nanocrystals via ligand exchange with N-heterocyclic carbenes (NHCs). Subsequent protonation of the NHC ligands in acid efficiently cleans the nanocrystals' surface while preserving their uniform morphology and structure for catalysis. The broad efficacy of this strategy is validated using monodisperse Pt, Pd, and Au nanocrystals, each prepared with strongly bound phosphine stabilizers. The surface-activated nanocrystals exhibit significantly improved catalytic activities, superior to those obtained with other surface cleaning methods, as demonstrated in two centrally important electrochemical reactions (glycerol oxidation and CO
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d15f3225db338083e8537451d17b83d https://doi.org/10.1021/jacs.0c12278 Zobrazit plný text záznamu