Ni-Co hydroxide nanosheets on plasma-reduced Co-based metal-organic nanocages for electrocatalytic water oxidation
Author(s)
Chen, Wenxia
Zhang, Yiwei
Huang, Rong
Zhou, Yuming
Wu, Yangjin
Hu, Yingjie
Ostrikov, Kostya Ken
Griffith University Author(s)
Year published
2019
Metadata
Show full item recordAbstract
Development of highly efficient and low-cost electrocatalysts for the oxygen evolution reaction (OER) with high electrical conductivity and chemical stability is critical for various energy conversion devices and systems, yet still remains a formidable challenge. Herein, we develop a novel porous 3D hybrid nanostructure decorated with nickel cobalt layered double hydroxides (NiCo LDHs) on the surface of the functional ZIF-67 template with rich oxygen vacancies (VO) etched by O2–Ar radio frequency (RF) plasma. The as-prepared NiCo LDH@ZIF-67-VO/NF hybrid materials exhibit excellent OER performance evidenced by the competitive ...
View more >Development of highly efficient and low-cost electrocatalysts for the oxygen evolution reaction (OER) with high electrical conductivity and chemical stability is critical for various energy conversion devices and systems, yet still remains a formidable challenge. Herein, we develop a novel porous 3D hybrid nanostructure decorated with nickel cobalt layered double hydroxides (NiCo LDHs) on the surface of the functional ZIF-67 template with rich oxygen vacancies (VO) etched by O2–Ar radio frequency (RF) plasma. The as-prepared NiCo LDH@ZIF-67-VO/NF hybrid materials exhibit excellent OER performance evidenced by the competitive potential of 1.52 V at the current density of 10 mA cm−2 in alkaline medium. Moreover, the Tafel slope of 58 mV dec−1 is much lower compared to that of noble metal oxide and other counterpart catalysts. Our experimental and theoretical calculation results reveal that incorporation of VO into the NiCo LDH@ZIF-67-VO/NF composite can efficiently tune the electronic structure and also increase the water adsorption energy, ultimately accelerating the OER process. The work presents a novel strategy for designing highly efficient composite electrode materials with rich oxygen vacancies for the effective, scalable electrocatalytic water oxidation.
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View more >Development of highly efficient and low-cost electrocatalysts for the oxygen evolution reaction (OER) with high electrical conductivity and chemical stability is critical for various energy conversion devices and systems, yet still remains a formidable challenge. Herein, we develop a novel porous 3D hybrid nanostructure decorated with nickel cobalt layered double hydroxides (NiCo LDHs) on the surface of the functional ZIF-67 template with rich oxygen vacancies (VO) etched by O2–Ar radio frequency (RF) plasma. The as-prepared NiCo LDH@ZIF-67-VO/NF hybrid materials exhibit excellent OER performance evidenced by the competitive potential of 1.52 V at the current density of 10 mA cm−2 in alkaline medium. Moreover, the Tafel slope of 58 mV dec−1 is much lower compared to that of noble metal oxide and other counterpart catalysts. Our experimental and theoretical calculation results reveal that incorporation of VO into the NiCo LDH@ZIF-67-VO/NF composite can efficiently tune the electronic structure and also increase the water adsorption energy, ultimately accelerating the OER process. The work presents a novel strategy for designing highly efficient composite electrode materials with rich oxygen vacancies for the effective, scalable electrocatalytic water oxidation.
View less >
Journal Title
Journal of Materials Chemistry A
Volume
7
Issue
9
Subject
Macromolecular and materials chemistry
Materials engineering
Science & Technology
Physical Sciences
Technology
Chemistry, Physical
Energy & Fuels