In Situ Transformation of Prussian‐Blue Analogue‐Derived Bimetallic Carbide Nanocubes by Water Oxidation: Applications for Energy Storage and Conversion. Issue 18 (10th September 2019)

• Record Type: Journal Article
• Authors: He, Bowen; Kuang, Panyong; Li, Xiaohe; Chen, Hu; Yu, Jiaguo; Fan, Ke
• Is Part Of: Chemistry. Volume 26:Issue 18(2020)
• Page Start: 4052
• Page End: 4062
• Publication Date: 2019-09-10
• Subjects: in situ Raman -- oxygen evolution reaction -- photoelectrocatalysis -- Prussian blue -- zinc–air batteries; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201902659
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Using bimetallic Prussian blue analogue (PBA) as a precursor is effective for preparing electrocatalysts for the oxygen evolution reaction (OER); however, the role of these PBA‐derived catalysts in the OER is still ambiguous. Herein, by simply controlling synthesis temperature, a bimetallic PBA‐derived O, N‐codoped Ni–Fe carbide, can be well tuned to optimize structure and OER performance. Importantly, by a series of ex situ and in situ investigations, real active species of NiFeO x H y are in situ formed on the surface during the OER, which reveals a "pre‐catalyst" role of O, N‐codoped Ni–Fe carbides. Furthermore, it has been successfully applied to highly efficient Zn–air batteries and outplays its RuO2 counterpart. When applied to photoelectrocatalytic water oxidation as the co‐catalyst, it improves the performance of the BiVO4 photoanode by enhancing hole collecting and transporting ability. We believe this research not only provides a highly efficient and low‐cost electrocatalyst for the OER, but also unveils the "pre‐catalyst" role of PBA‐derived materials in energy‐storage and conversion devices. Abstract : Photoelectrocatalysis : A bimetallic Ni–Fe PBA‐derived O, N‐codoped Ni–Fe carbide, can be well tuned to optimize the structure and OER performance. It is in situ transformed to the real active species of NiFeO x H y on the surface during OER measurement (see figure). Furthermore, this is then successfully applied to highly efficient Zn–air batteries and photoelectrocatalytic water oxidation.