Microfabrication and Redox Properties of the Single Microcrystal of Na₃Co(CN)₆/NaCl Solid Solution

Authors

Yi-liang ZHU, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
De-zhi YANG, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Ya-qiong SU, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
De-yin WU, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Zhong-qun TIAN, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
Dong-ping ZHAN, State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;Follow

Corresponding Author

Dong-ping ZHAN(dpzhan@xmu.edu.cn)

Abstract

Although the molecular structures are similar to each other, the redox property of Co(CN)₆^3- at solid/liquid interface is not so good as Fe(CN)₆^3-. In this paper, scanning electrochemical microscopy (SECM) was adopted to construct an electrochemical microsystem with a volume of fL~pL, in which a micropipette with micrometer-sized orifice was employed as the scanning tip. Due to the evaporation of water, the NaCl electrolyte is concentrated to form a microcrystal. During the crystallization, the redox species Co(CN)₆^3- replaced the sites of NaCl₆^5- unit due to their matching lattice parameters, i.e., the solid solution. Single Na₃Co(CN)₆/NaCl microcrystal was assembled in-situ between a pair of gold microelectrodes on a microchip to construct the solid/solid interface, which was found to have good voltammetric behavior.

Graphical Abstract

Keywords

solid solution, solid/solid interface, electrochemical microsystem, scanning electrochemical microscopy

DOI Link

https://doi.org/10.13208/j.electrochem.140320

Publication Date

2014-06-28

Online Available Date

2014-04-05

Revised Date

2014-03-28

Received Date

2014-03-20

Recommended Citation

Yi-liang ZHU, De-zhi YANG, Ya-qiong SU, De-yin WU, Zhong-qun TIAN, Dong-ping ZHAN. Microfabrication and Redox Properties of the Single Microcrystal of Na₃Co(CN)₆/NaCl Solid Solution[J]. Journal of Electrochemistry, 2014 , 20(3): 197-200.
DOI: 10.13208/j.electrochem.140320
Available at: https://jelectrochem.xmu.edu.cn/journal/vol20/iss3/1