Citation: Yifan LIU, Zhan ZHANG, Rongmei ZHU, Ziming QIU, Huan PANG. A three-dimensional flower-like Cu-based composite and its low-temperature calcination derivatives for efficient oxygen evolution reaction[J]. Chinese Journal of Inorganic Chemistry, ;2024, 40(5): 979-990. doi: 10.11862/CJIC.20240008 shu

A three-dimensional flower-like Cu-based composite and its low-temperature calcination derivatives for efficient oxygen evolution reaction

School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China

Corresponding author: Zhan ZHANG, zhanzhang@yzu.edu.cn Huan PANG, panghuan@yzu.edu.cn
Received Date: 5 January 2024
Revised Date: 6 March 2024

Figures(6)

A novel Cu-based composite with unique three-dimensional (3D) nanoflower-like morphology and mesoporous structure (abbreviated as Cu-NF) was developed, using zeolitic imidazolate framework-67 (ZIF-67) as precursor via facile Cu ion etching, followed by low-temperature calcination strategy. The mass ratio of Cu²⁺ to ZIF-67 played a key role in morphology control. Additionally, low-temperature calcination changed the chemical components of the active sites and improved the porosity for mass transportation with the original morphology preserved. Sample Cu-NF-300, calcined at 300 ℃ displayed the best oxygen evolution reaction (OER) performance among all the samples, with a small overpotential of 347 mV in 1.0 mol·L^-1 KOH and a low Tafel slope of 93 mV·dec^-1 for OER. Significant improvement in the electrochemical activity is attributed to the 3D superstructure and low-temperature calcination activation, which offer a simple synthetic strategy for the fabrication of Cu-based electrocatalysts for OER.
- three-dimensional morphology,
- Cu-based nanocomposite,
- facile synthesis,
- low-temperature calcination,
- oxygen evolution reaction
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