Citation: Xinran Li, Changli Wang, Yang-Yi Liu, Huaiguo Xue, Huan Pang, Qiang Xu. Cu-alanine complex-derived CuO electrocatalysts with hierarchical nanostructures for efficient oxygen evolution[J]. Chinese Chemical Letters, ;2021, 32(7): 2239-2242. doi: 10.1016/j.cclet.2020.12.037 shu

Cu-alanine complex-derived CuO electrocatalysts with hierarchical nanostructures for efficient oxygen evolution

Xinran Li ^a ,
Changli Wang ^a ,
Yang-Yi Liu ^a ,
Huaiguo Xue ^{a, *,} ,
Huan Pang ^{a, *,} ,
Qiang Xu ^{a, b, *,}

a.
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225009, China
b.
AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), National Institute of Advanced Industrial Science and Technology (AIST), Kyoto 606-8501, Japan

chhgxue@yzu.edu.cn

panghuan@yzu.edu.cn

xu.qiang@icems.kyoto-u.ac.jp

Received Date: 19 November 2020
Revised Date: 17 December 2020
Accepted Date: 18 December 2020
Available Online: 25 December 2020

Figures(4)

Nowadays, Cu-based materials have attracted extensive attention as electrocatalysts, while the inherent reason of the filling of high anti-bonding state of Cu d band (3d¹⁰4s¹) makes it difficult to hybridize with O 2p band of oxygen intermediates during the adsorption process of oxygen evolution reaction (OER). To increase the efficiency of Cu-based electrocatalysts, efforts have been made to optimize the electronic structures and to create surface defects and hierarchical nanostructures with more exposed accessible active sites. Herein, we report a facile method for preparing CuO electrocatalysts with hierarchical nanostructures using the Cu-alanine complex as a precursor through room-temperature chemical precipitation and subsequent calcination in air. Investigations of products obtained at different calcination temperatures reveal the relationship between OER activities and the material characteristics such as specific surface areas, crystal growth orientations, and element components. The product obtained at 500 ℃ exhibits the smallest overpotential of 290 mV in 1.0 mol/L KOH for electrocatalyzing OER. Combining with various characterizations of CuO electrocatalysts after OER activities, the possible catalytic mechanism and the influence factors of their OER performance are also discussed.
- Copper complex precursor,
- Copper oxide,
- Hierarchical nanostructure,
- Electrocatalysis,
- Oxygen evolution reaction
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