Amorphous‐Crystalline Interfaces on Hollow Nanocubes Derived from Ir‐Doped Ni–Fe–Zn Prussian Blue Analog Enables High Capability of Alkaline/Acidic/Saline Water Oxidations

Development of highly efficient and robust electrocatalysts for oxygen evolution reaction (OER) under specific electrolyte is a key to actualize commercial low‐temperature water electrolyzers. Herein, a rational catalyst design strategy is first reported based on amorphous–crystalline (a–c) interfac...

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Bibliographic Details
Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2023-12, Vol.19 (49), p.e2303912-n/a
Main Authors: Han, HyukSu, Kim, So Jung, Jung, Sun Young, Oh, Dongjo, Nayak, Arpan Kumar, Jang, Jin Uk, Bang, Junghwan, Yeo, Sunghwan, Shin, Tae Ho
Format: Article
Language:English
Subjects:
Acidic oxides
amorphous–crystalline interfaces
Catalysts
Catalytic activity
Durability
Electrocatalysts
Electrolysis
Electrolytes
Iron
Nanotechnology
Nickel
oxygen evolution reaction
Oxygen evolution reactions
Pigments
Prussian blue analogue
Saline water
Zinc
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Summary:Development of highly efficient and robust electrocatalysts for oxygen evolution reaction (OER) under specific electrolyte is a key to actualize commercial low‐temperature water electrolyzers. Herein, a rational catalyst design strategy is first reported based on amorphous–crystalline (a–c) interfacial engineering to achieve high catalytic activity and durability under diverse electrolytes that can be used for all types of low‐temperature water electrolysis. Abundant a–c interface (ACI) is implemented into a hollow nanocubic (pre)‐electrocatalyst which is derived from Ir‐doped Ni–Fe–Zn Prussian blue analogues (PBA). The implemented c–a interface is well maintained during prolonged OER in alkaline, alkalized saline, and acidic electrolytes demonstrating its diverse functionality for water electrolysis. Notably, the final catalyst exhibits superior catalytic activity with excellent durability for OER compared to that of benchmark IrO2 catalyst, regardless of chemical environment of electrolytes. Hence, this work can be an instructive guidance for developing the ACI engineered electroctalyst which can be diversely used for different types of low‐temperature electrolyzers. A high‐performance electrocatalyst derived from an Ir‐doped Ni–Fe–Zn Prussian blue analog with abundant amorphous–crystalline interfaces is developed for the efficient and durable water oxidations in diverse electrolytes, including alkaline, acidic, and alkalized seawater electrolytes.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.202303912