Three-dimensional porous superaerophobic nickel nanoflower electrodes for high-performance hydrazine oxidation
three-dimensional (3D) porous, Ni nanoflower, electrocatalysis, ultra-high stability
Finding inexpensive electrodes with high activity and stability is key to realize the practical application of fuel cells. Here, we report the fabrication of three-dimensional (3D) porous nickel nanoflower (3D-PNNF) electrodes via an in situ reduction method. The 3D-PNNF electrodes have a high surface area, show tight binding to the electroconductive substrate, and most importantly, have superaerophobic (bubble repellent) surfaces. Therefore, the electrocatalytic hydrazine oxidation performance of the 3D-PNNF electrodes was much higher than that of commercial Pt/C catalysts because of its ultra-weak gas-bubble adhesion and ultra-fast gas-bubble release. Furthermore, the 3D-PNNF electrodes showed ultra-high stability even under a high current density (260 mA/cm2), which makes it promising for practical applications. In addition, the construction of superaerophobic nanostructures could also be beneficial for other gas evolution processes (e.g., hydrogen evolution reaction).
Tsinghua University Press
Guang Feng,Yun Kuang,Yingjie Li,Xiaoming Sun, Three-dimensional porous superaerophobic nickel nanoflower electrodes for high-performance hydrazine oxidation. NanoRes.2015, 8(10): 3365–3371