Assembly of ultrathin NiOOH nanosheets on electrochemically pretreated glassy carbon electrode for electrocatalytic oxidation of glucose and methanol
Assembly of ultrathin NiOOH nanosheets on electrochemically pretreated glassy carbon electrode for electrocatalytic oxidation of glucose and methanol
复制标题
在电化学预处理的玻碳电极上组装超薄 NiOOH 纳米片用于葡萄糖和甲醇的电催化氧化
DOI：
10.1016/j.snb.2016.09.002
复制
发表时间：
2017-03-01
影响因子：
8.4
通讯作者：
Du, Ji-Min
中科院分区：
文献类型：
--
作者：
Li, Su-Juan;Guo, Wei;Du, Ji-Min
以表面活性剂为模板剂，采用水热法在温和的反应条件下合成了水性NiOOH纳米片。利用原子力显微镜（AFM）、X射线衍射（XRD）和扫描电子显微镜（SEM）对产物进行了表征，结果表明制备出了厚度仅为几个纳米的多孔NiOOH纳米片。将所得NiOOH纳米片通过简单的物理浴沉积法组装到电化学预处理的玻碳电极上，制备了NiOOH/EPGC电极。扫描电镜、能谱和电化学阻抗谱分析表明，NiOOH在EPGC表面成功组装。认为EPGC表面存在的较高的比表面积和较高的C-O官能团浓度是NiOOH电催化剂在电极上有效沉积的原因。以葡萄糖和甲醇为模型分子，研究了NIOOH/EPGC电极的电催化性能。电化学实验表明，NiOOH/EPGC电极对葡萄糖和甲醇具有良好的电氧化活性，该传感器对葡萄糖和甲醇具有快速、高灵敏度的响应，有望在医学、生物燃料电池和食品工业中得到应用。(C)2016爱思唯尔B. V.保留所有权利。
The aqueous NiOOH nanosheets were synthesized using a hydrothermal method via a surfactant template under mild reaction conditions. The as-prepared products were characterized by atomic force microscopy (AFM), X-ray diffraction (XRD) and scanning electron microscopy (SEM), the results of which indicated that ultrathin and porous NiOOH nanosheets with a thickness of only several nanometers have been obtained. The obtained NiOOH nanosheets were subsequently assembled on electrochemically pretreated glassy carbon (EPGC) electrode through a simple physical bath deposition method to form NiOOH/EPGC electrode. SEM, energy dispersive X-ray spectroscopy (EDX) and electrochemical impedance spectroscopy (EIS) proved the successful assembly of NiOOH on EPGC surface. The effective deposition of NiOOH electrocatalyst on electrode is believed to result from the higher surface area and higher surface concentration of C-O functional groups existing on EPGC surface. Glucose and methanol were selected as model molecules to investigate the electrocatalytic performance of NIOOH/EPGC electrode. The electrochemical experiments revealed that a favorable activity of the NiOOH/EPGC electrode toward electrooxidation of glucose and methanol has been found. The present NiOOH/EPGC based amperometric sensor exhibited a rapid and highly sensitive response to glucose and methanol, which might find promising applications in medical applications, biological fuel cells and food industries. (C) 2016 Elsevier B.V. All rights reserved.