![]() ![]() The iron is readily substituted for other metal cations, which allows it to mop up toxic caesium and thallium ions in the body. ![]() The pigment’s famously complicated structure features a cubic arrangement of iron and hexacyanoferrate ions. Now, researchers say it could help improve water splitting ‘artificial leaf’ technology, thanks to the catalytic activity of a cobalt-containing derivative. Prussian blue has been used for over 300 years as a pigment in dyes and an antidote to heavy metal poisoning. Read more about how to correctly acknowledge RSC content.The new catalyst (right) has a lattice structure similar to Prussian blue (left) Please go to the Copyright Clearance Center request page. In a third-party publication (excluding your thesis/dissertation for which permission is not required) If you want to reproduce the whole article If you are the author of this article, you do not need to request permission to reproduce figuresĪnd diagrams provided correct acknowledgement is given. Provided correct acknowledgement is given. If you are an author contributing to an RSC publication, you do not need to request permission To request permission to reproduce material from this article, please go to the Further studies concerning the effect of water and surface on these catalysts under mild conditions are essential to gain a better understanding of the mechanism of water oxidation and to advance the development of new catalysts.Įlectrocatalytic water oxidation reaction promoted by cobalt-Prussian blue and its thermal decomposition product under mild conditions This suggests that the different mechanisms and surface effects demonstrated by the Co 3O 4 catalyst are more conducive to efficient water oxidation than those of Prussian blue. Another important observation is that the Co 3O 4 catalyst has the best performance among the considered catalysts with the highest TON and TOF. It is suggested that the water coordinated to Co 2+ in Co–Co PBA 60 can accelerate the reaction and that there is a balance between the thermodynamic and kinetic characteristics for determining the final properties of the catalyst at pH = 7. Although Co–Co PBA 60 has a higher overpotential for water oxidation than Co–Co PBA 200, this catalyst is kinetically faster than Co PBA 200. Finally, Co 3O 4 is a thermal decomposition product obtained from heating cobalt-Prussian blue up to 400 ☌. Co–Co PBA 200 is the same starting material but heated up to 200 ☌ with a low water content. Co–Co PBA 60 refers to cobalt-Prussian blue heated up to 60 ☌ with a high content of water. For these reasons, we have reported herein a comparison of the electrochemical and chemical properties of three catalysts produced from cobalt-Prussian blue. Another important feature to consider is the industrial processability of electrolytic cells for water splitting. Although there are extensive reports in the literature about the application of these catalysts in water oxidation (the limiting step for hydrogen evolution), some limitations must be overcome in terms of improving the turnover frequency, oxygen production, long term stability, and elucidation of the mechanism. Cobalt-Prussian blue analogues are remarkable catalysts for the oxygen evolution reaction (water oxidation) under mild conditions such as neutral pH. ![]()
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