摘要
The surface properties of GCE treated by anodic polarization in strong alkaline solutions are makedly different from that of polished GCE. XPS results show thta more oxygenic groups as carbonyl and accid anhydride are formed on the electrode surface, the ratio of O/C increases, C1s and O1s peaks shift to higher binding energies. Moreover, the adsorptivity of the treated GCE decreases and shows no obvious adsorption for Fe2+ in H2SO4 solution. On the other hand, behaviour of the electrode reaction is also prominently improved. The background current is less, the electron transfer rate is greatly speeded up and the reverse of the electrode reaction for Fe3+/2+, Eu3+/2+ is effectively enhanced for treated GCE.
The surface properties of GCE treated by anodic polarization in strong alkaline solutions are makedly different from that of polished GCE. XPS results show thta more oxygenic groups as carbonyl and accid anhydride are formed on the electrode surface, the ratio of O/C increases, C1s and O1s peaks shift to higher binding energies. Moreover, the adsorptivity of the treated GCE decreases and shows no obvious adsorption for Fe2+ in H2SO4 solution. On the other hand, behaviour of the electrode reaction is also prominently improved. The background current is less, the electron transfer rate is greatly speeded up and the reverse of the electrode reaction for Fe3+/2+, Eu3+/2+ is effectively enhanced for treated GCE.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1996年第7期649-653,共5页
Acta Physico-Chimica Sinica
关键词
玻碳电极
阳极极化
XPS
强碱溶液
GCE, Anodic polarization, XPS, Strong alkaline solutions
