Citation: Mei-Rong Liu, Yang-Peng Lin, Kai Wang, Shumei Chen, Fei Wang, Tianhua Zhou. Hierarchical cobalt phenylphosphonate nanothorn flowers for enhanced electrocatalytic water oxidation at neutral pH[J]. Chinese Journal of Catalysis, ;2020, 41(10): 1654-1662. doi: S1872-2067(19)63513-8 shu

Hierarchical cobalt phenylphosphonate nanothorn flowers for enhanced electrocatalytic water oxidation at neutral pH

Mei-Rong Liu ^a,b, ,
Yang-Peng Lin ^a,b ,
Kai Wang ^c ,
Shumei Chen ^a ,
Fei Wang ^b ,
Tianhua Zhou ^b

a College of Chemistry, Fuzhou University, Fuzhou 350108, Fujian, China;
b State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, Fujian, China;
c College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610068, Sichuan, China

Received Date: 25 February 2020
Revised Date: 29 March 2020

Fund Project: This work was supported by the National Natural Science Foundation of China (51772291, 21871050).

Cobalt-based phosphate/phosphonates are a class of promising water oxidation catalysts at neutral pH. Herein, we reported a facile hydrothermal synthesis of various nanostructured cobalt phenylphosphonates. It is found that the number of hydroxyl group of structure-directing reagent is crucial for the construction of 3D hierarchical structures including hierarchical nanosheet flower-like assemblies and nanothorn microsphere. These samples were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, infrared, and X-ray photoelectron spectroscopy techniques. They can act as highly efficient electrocatalysts for the oxygen evolution reaction at neutral pH. Among these, hierarchical cobalt phenylphosphonate nanothorn flowers present excellent performance, affording a current density of 1 mA cm^-2 required a small overpotential of 393 mV. This work offers a new clue to develop high-performance metal phosphonate/phosphate catalysts toward electrochemical water oxidation.
- Phosphate,
- Morphology,
- Electrocatalysis,
- Neutral pH,
- Oxygen evolution reaction,
- Phosphonates
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