Journal
CATALYSIS TODAY
Volume 337, Issue -, Pages 147-154Publisher
ELSEVIER
DOI: 10.1016/j.cattod.2019.04.017
Keywords
Electrocatalysis; Plasma processing and doping; Transition metal hydroxide; Overall water splitting
Funding
- National Natural Science Foundation of China [11665005, 51862001, 51672249, 11505032]
- Zhejiang Natural Science Foundations of China [LY16A050002]
- Natural Science Foundation of Jiangxi Province [20171BAB211012, 20171ACB21049, 20161BAB211026]
- Science and Technology Project of Jiangxi Provincial Department of Education [GJJ170823, GJJ150981, GJJ170843]
- Bidding Project of Gannan Normal University [15zb05]
- Australian Research Council
- Program for Innovative Research Team of Zhejiang Sci-Tech University
- 521 Talent Project of Zhejiang Sci-Tech University
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Transition metal hydroxides play an important role in the development of high-efficiency electrocatalysts for water splitting. Here we report an advanced electrocatalyst made of NiCo layered double hydroxide (NiCo LDH) supported by three-dimensional (3D) NiCo foam (NCF). The microstructure and physicochemical properties of the NiCo LDH are custom-modified by the N-2/Ar radio-frequency (RF) plasma. The plasma enables effective doping of the NiCo LDH catalyst with nitrogen (partial nitridization), leading to the substantial improvement of electrocatalytic performance of the N-doped NiCo LDH (N-NiCo LDH) for overall water splitting in 1 M KOH. The overpotentials required to transfer a current density of 10 mA cm(-2) (eta(10)) in the HER and OER processes are 100 mV and 190 mV, respectively. M this current density, the H-2 and O-2 amounts generated by the N-NiCo LDH catalyst in 1 M KOH electrolyte are about 90 and 48 mu mol h(-1), respectively. The demonstrated electrocatalytic performance is very competitive with other state-of-the-art catalysts based on similar layered double hydroxide materials systems.
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