title: Vertically Aligned Porous Nickel(II) Hydroxide Nanosheets Supported on Carbon Paper with Long-Term Oxygen Evolution Performance.
abstract: Vertically aligned Ni(OH)2nanosheets were grown on carbon paper (CP) current collectors through a simple and cost-effective hydrothermal approach. The as-grown nanosheets are porous and highly crystallized. If used as a monolithic electrode for electrochemical water oxidation in alkaline solution, the carbon paper supported Ni(OH)2nanosheets [CP@Ni(OH)2] exhibit high electrocatalytic activity and excellent long-term stability. The electrode can attain an anodic current density of 20 mA cm-2at a low overpotential of 338 mV, comparable to that of state-of-the-art RuO2nanocatalysts supported on CP (CP/RuO2) with the same catalyst loading. Significantly, CP@Ni(OH)2shows much better long-term stability than CP/RuO2upon continuous galvanostatic electrolysis, particularly at a high industry-relevant current density such as 100 mA cm-2. CP@Ni(OH)2can sustain water oxidation at 100 mA cm-2for 50 h without any degradation, whereas the performance of CP/RuO2is much poorer and deteriorates gradually over time. CP@Ni(OH)2electrodes hold substantial promise for use as low-costing water oxidation anodes in electrolyzers.
authors.affiliation: International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330, Braga, Portugal.|State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, P.R. China.
authors.forename: Dehua
authors.initials: D
authors.lastname: Xiong
authors.affiliation: International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330, Braga, Portugal.
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.affiliation: International Iberian Nanotechnology Laboratory (INL), Av. Mestre Jose Veiga, 4715-330, Braga, Portugal.
authors.forename: Lifeng
authors.identifier: http://orcid.org/0000-0003-2732-7399
authors.initials: L
authors.lastname: Liu
keywords: electrocatalysis; nanostructures; nickel; oxygen evolution reaction; water splitting