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| A three-dimensional flower-like Cu-based composite and its low-temperature calcination derivatives for efficient oxygen evolution reaction |
| Author Name | Affiliation | E-mail | | LIU Yifan | School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | | | ZHANG Zhan | School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | zhanzhang@yzu.edu.cn | | ZHU Rongmei | School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | | | QIU Ziming | School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | | | PANG Huan | School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China | panghuan@yzu.edu.cn |
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| Abstract: 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 lowtemperature calcination activation, which offer a simple synthetic strategy for the fabrication of Cu-based electrocatalysts for OER. |
| Keywords: three-dimensional morphology Cu-based nanocomposite facile synthesis low-temperature calcination oxygen evolution reaction |
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| LIU Yifan,ZHANG Zhan,ZHU Rongmei,QIU Ziming,PANG Huan.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. |
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