Engineering Cu2O/Cu@CoO hierarchical nanospheres: synergetic effect of fast charge transfer cores and active shells for enhanced oxygen evolution reaction. Issue 7 (21st May 2019)

• Record Type: Journal Article
• Authors: Zhong, Xia; Zhang, Yuan; Geng, Zhibin; Shi, Fangbing; Jiang, Mengpei; Sun, Yu; Wu, Xiaofeng; Huang, Keke; Feng, Shouhua
• Is Part Of: Inorganic chemistry frontiers. Volume 6:Issue 7(2019)
• Page Start: 1660
• Page End: 1666
• Publication Date: 2019-05-21
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c9qi00400a
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : An OER catalyst that has a high conductivity Cu2 O/Cu core and a strong bonding interface with the active CoO shell was constructed. Abstract : A novel hollow core–shell Cu2 O/Cu@CoO nanosphere composed of a Cu2 O/Cu core and CoO shell was produced via a facile soft template method and a post-thermal annealing process. The formation of the Cu2 O/Cu metal/semiconductor core structure played a key role in increasing the conductivity and facilitated the fast charge transfer process during the electrochemical reaction. Engineering the chemical coupling of the active CoO shell provided a large surface roughness to the benefit of abundant adsorbed active OH − species for the OER. The synergetic effect of the fast charge transfer cores and active shells enhanced the OER. By adjusting the raw ratio of Cu/Co to 1/2, Cu2 O/Cu@CoO exhibited the lowest overpotential of 330 mV at 10 mA·cm −2 . This facile chemical method, which coupled CoO nanoparticles with Cu2 O/Cu hollow spheres, could pave the way for controlling the fabrication of other core–shell binary transition metal oxide heterogeneous catalysts in electrochemical applications.