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Prussian Blue Analogues–Derived CoFe–B Nanocubes with Increased Specific Surface Area and Modulated Electronic Structure as Enhanced Oxygen Evolution Electrocatalysts
Author(s) -
Yang Yu Xian,
Li Bang Lin,
Zhang Qing,
Guo Wan Hui,
Wang Xiao Hu,
Li Ling Jie,
Luo Hong Qun,
Li Nian Bing
Publication year - 2021
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202000178
Subject(s) - tafel equation , prussian blue , electrocatalyst , oxygen evolution , calcination , catalysis , materials science , nanomaterials , chemical engineering , electrochemistry , nanotechnology , water splitting , specific surface area , aqueous solution , inorganic chemistry , chemistry , electrode , photocatalysis , organic chemistry , engineering
Questing for efficient and inexpensive catalysts for electrochemical water splitting is vital for energy conversion and storage. Herein, Prussian blue analogues (PBA)‐derived CoFe‐based nanomaterials with increased specific surface area and abundant catalytic active sites are utilized as efficient and durable electrocatalysts for oxygen evolution reaction (OER). Due to the adjustable chemical conformation and controllable 3D morphology, CoFe–B nanocubes exhibit an ultrathin nanosheets–wrapped nanocube structure with excellent electrocatalytic performance and remarkable reaction kinetics in 1.0 m KOH aqueous solution. In addition, CoFe–B nanocubes cost overpotentials of 261 and 338 mV at corresponding current densities of 10 and 200 mA cm −2 , respectively, with small Tafel slope of 61 mV dec −1 for OER, which displays higher catalytic capability than the reported commercial RuO 2 . The outstanding electrocatalytic performance can be mainly attributed to the unique ultrathin nanosheets–wrapped nanocube structure which is generated from calcination. This work not only provides a new way for the application of PBA but also obtains an alternative for efficient electrocatalysis.