From a layered iridium(iii)–cobalt(ii) organophosphonate to an efficient oxygen-evolution-reaction electrocatalyst. Issue 92 (4th November 2019)

• Record Type: Journal Article
• Authors: Liao, Chwen-Haw; Fan, Kun; Bao, Song-Song; Fan, Hao; Wang, Xi-Zhang; Hu, Zheng; Kurmoo, Mohamedally; Zheng, Li-Min
• Is Part Of: Chemical communications. Volume 55:Issue 92(2019)
• Page Start: 13920
• Page End: 13923
• Publication Date: 2019-11-04
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c9cc06164a
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Porous layered iridium–cobalt MOF Co II 2 [Ir III (ppy-COOH)2 (ppy-COO)]2 (HOCH2 PO3 )·12H2 O·2.5DMF, calcined under oxygen provides homogeneously distributed metal oxides and phosphate showing efficient catalytic properties for the OER. Abstract : Bimetallic MOF precursors can produce a homogeneous distribution of mixed-metal oxides after calcination, and thus may provide high efficiency as electrocatalysts in the water splitting process. We designed a layered bimetallic-organophosphonate containing Ir, Co and P because the metal-oxides are well-known for their efficiency in the oxygen-evolution reaction (OER), especially when the phosphate acts as a proton carrier. We describe the structure of the MOF and characteristics of the calcined form, which has outstanding OER characteristics in 1.0 M KOH with an overpotential of 317.7 mV at 10 mA cm −2 and a low Tafel slope of 59.1 mV dec −1 .