期刊
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
卷 -, 期 -, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.202200590
关键词
mass activity; NiO; oxygen evolution reaction; pulsed laser ablation in liquid; Rutherford backscattering spectrometry
Electrochemical water-splitting using renewable energy is aimed at producing green H-2. Efficient and sustainable electrocatalysts, such as Ni oxyhydroxides, are needed for a proper energy transition. Optimizing the intrinsic properties and synthesis procedure is still necessary.
Electrochemical water-splitting, sustained by renewable energy, is aimed at green H-2 production. Efficient and sustainable electrocatalysts are required for a proper energy transition. Oxygen evolution reaction (OER) in alkaline electrolyte can be pursued by using earth-abundant elements-based catalysts, such as Ni oxyhydroxides. A proper optimization of intrinsic properties and synthesis procedure is still needed. Herein, the synthesis of Ni/NiO nanoparticles (NPs) through a physical and green technique, pulsed laser ablation in liquid (PLAL), is presented. Ablating a Ni target in deionized water, at different ablation times, leads to NP dispersions used for realization of OER electrode onto graphene paper. Ion-beam analysis of catalysts amount and homogeneity of NP-based electrode is performed for the electrode optimization in terms of electrochemical performances. An overpotential at 10 mA cm(-2) of 306 mV is achieved for 40 mu g cm(-2) of catalyst, while lowering the catalyst amount to 8 mu g cm(-2), unprecedented turnover frequency of 0.20 s(-1) and mass activity of approximate to 1.3 A mg(-1) are reached. These data show that Ni/NiO NPs produced by PLAL are highly effective for OER in alkaline media and encourage the use of PLAL as a green and efficient technique for electrocatalyst production.
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