How to Build Prussian Blue Based Water Oxidation Catalytic Assemblies: Common Trends and Strategies

• Published in: Chemistry : a European journal Vol. 27; no. 11; pp. 3638 - 3649
• Main Authors: Ulusoy Ghobadi, T. Gamze, Ozbay, Ekmel, Karadas, Ferdi
• Format: Journal Article
• Language: English
• Published: Germany Wiley Subscription Services, Inc 19.02.2021
• Subjects: Assemblies; Catalysts; Catalytic activity; Chemistry; Cobalt; CoFe-PBA; Electrochemistry; Electronics industry; Morphology; Oxidation; Photocatalysis; photosensitizers (PS); Pigments; Prussian blue; PS-WOC assemblies; Reviews; robust photoelectrodes; water oxidation catalysts (WOC); PS-WOC assemblies; Prussian blue; photosensitizers (PS); robust photoelectrodes; CoFe-PBA; water oxidation catalysts (WOC)
• ISSN: 0947-6539; 1521-3765
• DOI: 10.1002/chem.202004091

Prussian blue (PB) and its analogues (PBAs) have at least a three‐century‐long history in coordination chemistry. Recently, cobalt‐based PBAs have been acknowledged as efficient and robust water oxidation catalysts. Given the flexibility in their synthesis, the structure and morphology of cobalt‐based PBAs have been modified for enhanced catalytic activity under electrochemical (EC), photocatalytic (PC), and photoelectrochemical (PEC) conditions. Here, in this review, the work on cobalt‐based PBAs is presented in four sections: i) electrocatalytic water oxidation with bare PBAs, ii) photocatalytic processes in the presence of a photosensitizer (PS), iii) photoelectrochemical water oxidation by coupling PBAs to proper semiconductors (SCs), and iv) the utilization of PBA‐PS assemblies coated on SCs for the dye‐sensitized photoelectrochemical water oxidation. This review will guide readers through the structure and catalytic activity relationship in cobalt‐based PBAs by describing the role of each structural component. Furthermore, this review aims to provide insight into common strategies to enhance the catalytic activity of PBAs. Blue is the color: Cobalt‐based Prussian blue analogues (CoFe PBAs) have been established as one of the well‐known non‐oxide bulk water oxidation catalysts, which can operate even under harsh acidic conditions. This review presents the common synthetic strategies to enhance their catalytic activities and general trends in Prussian blue based photocatalytic, photoelectrocatalytic, and dye‐sensitized photoelectrochemical assemblies.