ic9b02524_si_001.pdf (2.84 MB)

Geometric and Electronic Engineering of Mn-Doped Cu(OH)2 Hexagonal Nanorings for Superior Oxygen Evolution Reaction Electrocatalysis

Download (2.84 MB)
journal contribution
posted on 25.10.2019 by Hui Xu, Hongyuan Shang, Junwei Di, Yukou Du
The research on exploring advanced electrocatalysts that coupled with structural coherence and fast mass/electron transport characteristics, and maximized electrocatalytic redox activity is extremely urgent for the oxygen evolution reaction (OER), a key process for water dissociation, but it still challenging. Herein, we demonstrate a templated-engaged strategy for the fabrication of highly open and defect-rich Mn-doped Cu­(OH)2 hexagonal nanorings (denoted as Mn-doped Cu­(OH)2 HNs) by employing Mn­(OH)2 hexagonal nanoplates as a sacrificial template. As a result of the successful doping of Mn into Cu­(OH)2, the as-prepared Mn-doped Cu­(OH)2 HNs possess rich defects and a modified electronic structure, which contribute to the exceptional property as a catalyst for OER electrocatalysis. More importantly, by coupling nickel foam (NF) supported Mn-doped Cu­(OH)2 HNs as the anode electrode, NFs supported Pt/C as cathode electrode, a potential of only 1.62 V is needed to drive the water electrolysis to reach the current density of 10 mA cm–2, comparable to the commercial IrO2//Pt/C couple.