纳米针阵列多孔材料3D CoP@CC的制备与电催化析氢性能研究  

Preparation and Electrocatalytic Hydrogen Evolution Reaction Properties of Porous 3D CoP@CC Material with Arrays of Nano-Needle Structure

作　　者：周传仓[1] 张飞鹏 吴红玉[1] 苗义高 冯巧 杜玲枝 秦国强 张光磊 ZHOU Chuancang;ZHANG Feipeng;WU Hongyu;MIAO Yigao;FENG Qiao;DU Lingzhi;QIN Guoqiang;ZHANG Guanglei(College of Engineering,Lishui University,Lishui 323000,China;Henan Provincial Engineering Laboratory of Building-Photovoltaics,Institute of Sciences,Henan University of Urban Construction,Pingdingshan 467036,China;School of Materials Sciences and Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]丽水学院工学院,丽水323000 [2]河南城建学院数理学院,建筑光伏一体化河南省工程实验室,平顶山467036 [3]石家庄铁道大学材料科学与工程学院,石家庄050043

出　　处：《人工晶体学报》2020年第9期1673-1677,共5页Journal of Synthetic Crystals

基　　金：浙江省科技计划公益类项目(2017C31108);河南省高等学校重点科研项目(19B430001);河南省自然科学基金(162300410007);国家自然科学基金(51572066)。

摘　　要：采用水热法在碳布基底上沉积了前驱体,然后在Ar气气氛中加热并用次磷酸钠在300~350℃磷化得到了纳米针阵列多孔材料3D CoP@CC,并分析了所得样品的物相、微观结构和电催化性能。XRD分析结果表明所得材料本体为正交结构的CoP,SEM分析结果表明所得阵列结构纳米针的直径在100 nm以下,长度约为10μm。电催化性能分析结果表明,制备所得该3D CoP@CC作为催化材料在0.5 mol/L硫酸溶液中表现出优异的电催化析氢性能,当电流密度为10 mA·cm-2时,过电位为124 mV。Tafel斜率为84.9 mV/dec,说明该3D CoP-CC电催化析氢的控速步为Volmer反应。从阻抗图谱可以看出有两个不完整的半圆弧,表明其具有两个时间常数,CPE2-P=0.5019意味着粗糙和多孔的电极表面产生了双层电容,电荷较难穿透,表明了阻抗的来源主要是传质与传荷。The precursor was precipitated by hydrothermal method on the carbon cloth matrix,and the porous 3D CoP@CC material with arrays of nano-needle structure was prepared by heating the precursor in the atmosphere of Ar and sodium hypophosphiteat at 300-350℃.Its phase composition,microstructure and electrocatalytic performances were analyzed.XRD results indicate the sample is CoP with orthorhombic structure;SEM results indicate the diameter for the arrays of nano-needle structure is less than 100 nm and length is about 10μm.The electrocatalytic performance results show that the 3D CoP@CC as catalytic materials exhibit excellent electrocatalytic hydrogen evolution reaction(HER)property in the 0.5 mol/L solution of H 2SO 4.The overpotential reaches 124 mV when the current density is 10 mA·cm-2.The slope of Tafel is 84.9 mV/dec,which indicates that the key reaction is Volmer reaction.There are two half circles of the EIS spectrum,which indicates that there should be two time constants.The value of 0.5019 for CPE2-P indicates that double layer capacity should be produced on the roughly porous surface of the electrode,which is hard for carriers to transit;this also shows that the main resistivity is originating from mass transition and carrier transition.

关 键 词：CoP@CC 多孔材料 纳米针阵列 水热法 电催化析氢 

分 类 号：TQ139.2[化学工程—无机化工] O643.36[理学—物理化学]