Morphology changes and mechanistic aspects of the electrochemically-induced reversible solid-solid transformation of microcrystalline TCNQ into Co TCNQ 2-based materials (TCNQ= 7, 7, 8, 8-Tetracyanoquinodimethane)
Morphology changes and mechanistic aspects of the electrochemically-induced reversible solid-solid transformation of microcrystalline TCNQ into Co TCNQ 2-based materials (TCNQ= 7, 7, 8, 8-Tetracyanoquinodimethane)
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DOI：
10.1021/cm060852j
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发表时间：
2006-08
影响因子：
8.6
通讯作者：
A. Nafady;A. O’Mullane;A. Bond;A. Neufeld
中科院分区：
文献类型：
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作者：
A. Nafady;A. O’Mullane;A. Bond;A. Neufeld
在含有Co2+（aq）的电解质存在下，TCNQ修饰的玻璃碳、氧化铟锡或金属电极向Co[TCNQ]2（H2O）2材料的化学可逆的固-固相转化已被诱导和电化学监测。伏安数据表明，TCNQ/Co[TCNQ]2（H2O）2的相互转化过程与电极材料和电解液中钴离子的性质无关。循环伏安法和双电位阶跃计时电流法研究表明，Co[TCNQ]2（H2O）2的形成是通过一个速率控制的成核和生长过程，该过程首先涉及Co 2+（aq）离子在TCNQ晶格中的掺入|电极|电解质界面类似地，逆（氧化）过程，其中涉及固体Co[TCNQ]2（H2O）2转化回母体TCNQ Cr…
The chemically reversible solid−solid phase transformation of a TCNQ-modified glassy carbon, indium tin oxide, or metal electrode into Co[TCNQ]2(H2O)2 material in the presence of Co2+(aq) containing electrolytes has been induced and monitored electrochemically. Voltammetric data reveal that the TCNQ/Co[TCNQ]2(H2O)2 interconversion process is independent of electrode material and identity of cobalt electrolyte anion. However, a marked dependence on electrolyte concentration, scan rate, and method of electrode modification (drop casting or mechanical attachment) is found. Cyclic voltammetric and double potential step chronoamperometric measurements confirm that formation of Co[TCNQ]2(H2O)2 occurs through a rate-determining nucleation and growth process that initially involves incorporation of Co2+(aq) ions into the reduced TCNQ crystal lattice at the TCNQ|electrode|electrolyte interface. Similarly, the reverse (oxidation) process, which involves transformation of solid Co[TCNQ]2(H2O)2 back to parent TCNQ cr...