Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 6, Issue 14, Pages 5574-5579Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta00622a
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Funding
- National Natural Science Foundation of China [51771131]
- Recruitment Program of Global Experts 1000 Talents Plan of China [WQ20121200052]
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The development of high-performance earth-abundant bifunctional electrocatalysts for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) is highly desirable, but remains a significant challenge. Herein, a type of content-controllable amorphous Ni-Fe-P catalyst with a bicontinuous nanostructure has been reported to be useful as a bifunctional electrocatalyst for overall water splitting. np-(NixFe1-x)(4)P-5 is prepared simply by an electrochemical dealloying method. Owing to the bicontinuous nanostructure, amorphous atomic arrangement, metallic nature, and the substitution of Ni by Fe, np-(Ni0.67Fe0.33)(4)P-5 exhibits excellent catalytic performance with the overpotentials of 245 mV and 120 mV at the current density of 10 mA cm(-2) for OER and HER in 1 M KOH, respectively. Furthermore, the np-(Ni0.67Fe0.33)(4)P-5 catalyst as both an anode and a cathode shows a high current density of 10 mA cm(-2) at a low potential of 1.62 V in a two-electrode water electrolysis system with excellent stability for 20 h.
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