Journal
JOURNAL OF POWER SOURCES
Volume 520, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2021.230884
Keywords
Prussian blue analogues (PBAs); Water splitting; Transition metal-based phosphides; Oxygen evolution reaction; Electrocatalysis
Funding
- National Natural Science Foundation of China [21871156]
- Zhejiang Provincial Education Fund of China [Y201737172]
- K.C. Wong Magna Fund in Ningbo University
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In this study, CoFeP nanocube-arrays (NCAs) composite was successfully fabricated and grown on a 3D porous conductive substrate. The material exhibited exciting electrocatalytic performance with extremely low overpotentials and remarkable durability. Outstanding electrocatalytic results were also obtained in overall water splitting experiments.
Exploring the replacement of novel metal-based electrocatalysts based on non-precious metal is still a challenge. Transition metal-based phosphides as a kind of highly efficient oxygen reaction (OER) catalyst is considered as a judicious select for renewable energy conversion and storage. In this work, CoFeP nanocube-arrays (NCAs) composite is successfully fabricated on a 3D porous conductive substrate (nickel foam), namely as CoFeP/NF. The CoFeP/NF material exhibits exciting electrocatalytic performance with extremely low overpotentials of 253 and 290 mV at the current density of 10 and 50 mA cm(-2) in 1 M KOH, respectively. Especially, remarkable durability for 100 h can be observed, which is a key parameter for practical application. CoFeP/NF parallel to Pt/C/NF as a two-electrode system is applied into overall water splitting. A series of outstanding electrocatalytic results are obtained, including a very low voltage of 1.54 V for achieving the current density of 10 mA cm(-2) with remarkable stability in 1 M KOH. These performances have far superior to commercial noble metal of IrO2/NF parallel to Pt/C/NF. Therefore, this work not only provides some practical electrocatalyst materials, more importantly, it opens a feasible and universal strategy for constructing well-defined nanocube-array electrocatalysts for energy storage and conversion.
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