摘要
通过原位还原将金属钴(Co)粒子负载于氧化石墨烯(GO)合成钴/还原氧化石墨烯(RGO)(Co/RGO),在氩气保护条件下与次磷酸钠(NaH2PO2)混合加热反应制得磷化钴(CoP)/RGO(CoP/RGO)复合材料,并对样品进行了表征,在0. 5mol/L的硫酸溶液中采用线性扫描法测试了材料的电催化析氢性能。结果表明:负载于石墨烯上的CoP纳米颗粒形貌单一,晶格间距0. 24nm,Co和P的比例约1∶1,复合材料做成的电极其催化析氢过电位显著减小为116mV,经过500次循环后性能略有衰减,析氢过电位为130mV,性能衰减率为12%。与单一材料相比具有较高的催化活性,有效提高了电催化析氢性能。
The CoP/RGO composite materials were synthesized by in-situ reduction in the argon protection environment. The compositions,structures,and morphologies of the composites were characterized by Raman spectra. The hydrogen evolution reaction was tested by linear scanning in 0. 5 mol/L sulfuric acid solution. The results showed that the nanosized particles of the CoP were relatively dispersed on the graphene,the lattice spacing of CoP was 0. 24 nm and the ratio of Co and P was approximately 1∶ 1. It was found that the CoP/RGO composite showed an enhanced catalytic activity with the over potential 116 mV. The performance degradation rate was about 12%(from 116 mV to 130 mV) after 500 cycles. Compared with the single material,the composite had higher catalytic activity,which effectively increased the activity of electrocatalytic hydrogenation.
作者
李俊莉
杨玉琴
皇甫鑫强
陈选欣
Li Junli;Yang Yuqin;Huangfu Xinqiang;Chen Xuanxin(College of Chemistry and Environmental Science,Qujing Normal University,Qujing 655011)
出处
《化工新型材料》
CAS
CSCD
北大核心
2019年第11期141-144,共4页
New Chemical Materials
基金
云南省大学生创新创业训练项目(2077360150)
