材料科学
过电位
钻石
微观结构
多孔性
化学气相沉积
化学工程
电化学
电极
硼
纳米技术
复合数
复合材料
有机化学
化学
物理化学
工程类
作者
Zhiyuan Lu,Nan Huang,Zhaofeng Zhai,Bin Chen,Lusheng Liu,Haozhe Song,Zhengqiu Yuan,Chuyan Zhang,Bing Yang,Xin Jiang
标识
DOI:10.1016/j.jmst.2021.07.020
摘要
Three-dimensional (3D) porous boron-doped diamond (BDD) film is an attractive electrode material but tough to synthesize. Herein, the 3D porous BDD films were constructed in a facile and template-free way. The BDD/non-diamond carbon (NDC) composite films were firstly fabricated by hot filament chemical vapor deposition (HFCVD) technique, and then the porous BDD films with 3D interconnected porous microstructure, different pore size and NDC-free diamond were achieved by selective removal of NDC. It is manifested that higher electrochemical response, large double layer capacitance (17.54 mF/cm2) in diamond electrodes, wide electrochemical window of 2.6 V and superior long-term stability were achieved for 3D porous BDD film. This derives from the synergistic effect of microstructure and phase composition of the porous films. 3D interconnected structure possesses prominent improvement of effective surface area and accessible porous channel, significantly enhancing the species adsorption and mass transfer. The 3D porous BDD films, composed of NDC-free diamond, exhibit excellent structural stability and corrosion resistance, which favor the enhancement of long-term stability and water splitting overpotential. The facile fabricating approach and excellent structure/electrochemical character demonstrate the appealing application in many electrochemical fields for 3D porous BDD films, such as energy storage and conversion, wastewater treatment and purification.
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