摘要
以硫脲作为硫源,在改进的瓦特镀液体系中用电沉积方法获得N i-S合金镀层,系统地研究了硫脲浓度、电流密度、电沉积时间、镀液温度、pH值、有机添加剂等实验条件对N i-S合金电极析氢活性的影响.用重量分析法测定电沉积层中硫的含量,X-射线衍射技术表征镀层的晶形结构,稳态恒流极化法研究N i-S合金层的电催化活性.实验结果表明,电沉积得到的析氢活性较好的镍硫合金为非晶态结构和弱晶结构,硫含量为11.59%(重量比)时,N i-S合金电极具有优良的电催化性能,且在长期电解条件下电极仍有良好的析氢活性.
The coating of nickel-sulfur alloys was obtained by electrodeposition method in a modified Watts bath with thiourea as the sulfur source. The effects of experimental conditions, such as concentration of thiourea, current density, electroplating time, temperature, pH, organic additives, on the catalytic activity of Ni-S alloys for hydrogen evolution reaction were systematically studied. The sulfur content in electrodeposition coatings was analyzed by gravimetric method, the structure of Ni-S alloys was characterized by X-ray diffraction technique, and the electrocatalytic activity of nickel-sulfur electrode was measured by constant current steady polarization method. The results show that Ni-S electro deposits which have better HER activity were amorphous, the Ni-S alloy ele ctrode with sulfur content of 11.59 wt% performed excellent electrocatalytic property and lasts good activity for hydrogen evolution reaction during long-term electrolysis.
出处
《信阳师范学院学报（自然科学版）》
CAS
北大核心
2006年第2期210-213,共4页
Journal of Xinyang Normal University(Natural Science Edition)
基金
教育部留学回国人员科研启动基金资助项目
关键词
电沉积
镍-硫电极
析氢反应
electrodeposition
nickel-sulfur electrode
hydrogen evolution reaction
