Effect of interlayer anions on [NiFe]-LDH nanosheet water oxidation activity

By Bryan M. Hunter, W. Hieringer, J. Winkler, Harry B. Gray, Astrid M. Müller. 2016

364 citations recorded by the source corpus.

We synthesized nickel–iron layered double hydroxide ([NiFe]-LDH) nanosheets with different interlayer anions to probe their role in water oxidation catalysis. In alkaline electrolyte in ambient air, carbonate rapidly replaced other interlayer anions and catalytic activity was highest. Electrocatalytic water oxidation in virtually carbonate-free alkaline electrolyte revealed that activity was a function of anion basicity. Our [NiFe]-LDH nanosheets, prepared by pulsed laser ablation in liquids, were regenerated in carbonate-containing aqueous KOH. Anion binding motifs were assessed by X-ray photoelectron spectroscopy in combination with density functional theory calculations, suggesting that nitrite species bound to edge-site Fe in the precatalyst correlated with higher water oxidation activity.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/8de30e9bfb60bd45101c94e402776b965ae20c2d

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Electrical and Electronic Engineering

In Materials Chemistry

In Renewable Energy, Sustainability and the Environment

Citations in the corpus

Effects of redox-active interlayer anions on the oxygen evolution reactivity of NiFe-layered double hydroxide nanosheets (2018, background): “A recent study by Müller et al [44] showed that the OER activity of the NiFe-LDHs increases with the basicity of the intercalated anions such as BF4, Cl−, SO4, and so on.”