Synthetic strategy for metallophthalocyanine covalent organic frameworks for electrochemical water oxidation. (December 2022)

• Record Type: Journal Article
• Authors: Jarju, J.J.; Díez, A.M.; Frey, L.; Sousa, V.; Carbó-Argibay, E.; Gonçalves, L.P.L.; Medina, D.D.; Lebedev, O.I.; Kolen'ko, Yu.V.; Salonen, L.M.
• Is Part Of: Materials today chemistry. Volume 26(2022)
• Publication Date: 2022-12
• Subjects: Covalent organic frameworks -- Phthalocyanines -- Earth abundant transition metals -- Electrocatalysis -- Oxygen evolution reaction; Chemistry -- Periodicals; Materials -- Research -- Periodicals; Materials science -- Periodicals; Chemistry; Materials -- Research; Electronic journals; Periodicals; 660.282
• DOI: 10.1016/j.mtchem.2022.101032
• Languages: English
• ISSNs: 2468-5194

Abstract

Abstract: Atomically dispersed metal catalysts are interesting materials for electrocatalysis. To this end, covalent organic frameworks (COFs) offer an excellent opportunity for the periodic placement of catalytically active single metal atoms within a porous framework. We report here a synthetic strategy to a series of imide-linked metal-containing phthalocyanine (Pc) COFs with different metal contents. Electrocatalytic activity of the materials towards oxygen evolution reaction was studied under alkaline conditions and the COF prepared from NiPc showed the best performance with current density j = 10 mA cm −2 being reached at overpotential η 10 ≈ 410 mV and Tafel slope of b = 75 mV/dec. In addition, the material showed excellent long-term stability during the testing time of 100 h. Highlights: Synthetic strategy to imide metal phthalocyanine covalent organic frameworks (COFs). A series of Ni/Fe-containing COFs with different metal ratios was prepared. The COFs were active electrocatalysts towards alkaline oxygen evolution reaction. NiPcCOF reached a current density j of 10 mA cm −2 at overpotential of 410 mV. Electrocatalysts demonstrated stable performance during stability test over 100 h.