Prussian blue analogues as platform materials for understanding and developing oxygen evolution reaction electrocatalysts
| Autor: | Brian M. Tackett, Zhenhua Xie, Jingguang G. Chen, Wenqian Xu, Shyam Kattel, Ji Hoon Lee, Steven R. Denny, Yan Wang, Sooyeon Hwang |
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| Rok vydání: | 2021 |
| Předmět: |
Prussian blue
Activity profile 010405 organic chemistry Binding energy Inorganic chemistry Oxygen evolution Crystal structure 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound chemistry Transition metal Density functional theory Physical and Theoretical Chemistry |
| Zdroj: | Journal of Catalysis. 393:390-398 |
| ISSN: | 0021-9517 |
| DOI: | 10.1016/j.jcat.2020.12.002 |
| Popis: | Transition metal based materials containing Fe have drawn great attention as oxygen evolution reaction (OER) catalysts. The nature of the electrocatalytic active species remains under debate due to the ambiguous physicochemical properties of the catalyst materials, such as the oxidation states and crystal structures. Here, in order to address this issue, transition metal Prussian blue analogues (TM-PBA, Na(TM)(Fe)(CN)6, TM = V, Fe, Co, and Ni) with an isomorphous structure are investigated for OER catalysis. Our combined experimental measurements and density functional theory (DFT) calculations reveal that TM-PBAs exhibit volcano-like OER activity with Ni-PBA located near the top of the volcano. Such a volcano-like activity profile can be attributed to the distinctive binding energy difference between *O and *OH on different TM-PBAs surfaces. This work demonstrates that TM-PBAs can be used as platform materials for understanding structure-property-activity relationships in OER catalysts. |
| Databáze: | OpenAIRE |
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