Issue 2, 2024

Synergistic effect of composition gradient and morphology on the catalytic activity of amorphous FeCoNi-LDH

Abstract

The rational design of electrocatalysts with well-designed compositions and structures for the oxygen evolution reaction (OER) is promising and challenging. Herein, we developed a novel strategy – a one-step double-cation etching sedimentation equilibrium strategy – to synthesize amorphous hollow Fe-Co-Ni layered double hydroxide nanocages with an outer surface of vertically interconnected ultrathin nanosheets (Fe-Co-Ni-LDH), which primarily depends on the in situ etching sedimentation equilibrium of the template interface. This unique vertical nanosheet-shell hierarchical nanostructure possesses enhanced charge transfer, increased active sites, and favorable kinetics during electrolysis, resulting in superb electrocatalytic performance for the oxygen evolution reaction (OER). Specifically, the Fe-Co-Ni-LDH nanocages exhibited remarkable OER activity in alkaline electrolytes and achieved a current density of 100 mA cm−2 at a low overpotential of 272 mV with excellent stability. This powerful strategy provides a profound molecular-level insight into the control of the morphology and composition of 2D layered materials.

Graphical abstract: Synergistic effect of composition gradient and morphology on the catalytic activity of amorphous FeCoNi-LDH

Supplementary files

Article information

Article type
Paper
Submitted
01 Nov 2023
Accepted
22 Dec 2023
First published
23 Dec 2023
This article is Open Access
Creative Commons BY-NC license

Nanoscale Adv., 2024,6, 638-647

Synergistic effect of composition gradient and morphology on the catalytic activity of amorphous FeCoNi-LDH

Y. Li, X. N. Fu, L. Zhu, Y. Xie, G. L. Shao, B. Zhou, W. Huang, G. Huang and N. Wang, Nanoscale Adv., 2024, 6, 638 DOI: 10.1039/D3NA00949A

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