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

Autor:	Li YY; School of Sciences, Henan University of Technology Zhengzhou 450001 China 85liyuanyuan@haut.edu.cn.; Institute of Physical Properties for Quantum Functional Materials, School of Sciences, Henan University of Technology Zhengzhou 450001 China., Fu XN; School of Sciences, Henan University of Technology Zhengzhou 450001 China 85liyuanyuan@haut.edu.cn., Zhu L; School of Sciences, Henan University of Technology Zhengzhou 450001 China 85liyuanyuan@haut.edu.cn., Xie Y; School of Sciences, Henan University of Technology Zhengzhou 450001 China 85liyuanyuan@haut.edu.cn., Shao GL; Interdisciplinary Research Center for Sustainable Energy Science and Engineering (IRC4SE2), School of Chemical Engineering, Zhengzhou University Zhengzhou 450001 China., Zhou BX; School of Materials Science and Engineering, Henan Polytechnic University Jiaozuo 454003 China., Huang WQ; Department of Applied Physics, School of Physics and Electronics, Hunan University Changsha 410082 China., Huang GF; Department of Applied Physics, School of Physics and Electronics, Hunan University Changsha 410082 China., Wang N; School of Sciences, Henan University of Technology Zhengzhou 450001 China 85liyuanyuan@haut.edu.cn.
Jazyk:	angličtina
Zdroj:	Nanoscale advances [Nanoscale Adv] 2023 Dec 23; Vol. 6 (2), pp. 638-647. Date of Electronic Publication: 2023 Dec 23 (Print Publication: 2024).
DOI:	10.1039/d3na00949a
Abstrakt:	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. Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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