Switching between Two Oscillatory States Depending on the Electrical Potential
Switching between Two Oscillatory States Depending on the Electrical Potential
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DOI：
10.1021/acs.jpcb.0c11019
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发表时间：
2021-04-02
影响因子：
3.3
通讯作者：
Nakata, Satoshi
中科院分区：
文献类型：
--
作者：
Kuze, Masakazu;Horisaka, Mad;Nakata, Satoshi
在负载有 Belousov-Zhabotinsky (BZ) 反应催化剂的阳离子交换树脂珠的表面或体内产生了各种时空图案。在之前的论文中观察到全局振荡 (GO) 或行波 (TW) 以及它们之间的切换，但尚不清楚化学物质如何促进 BZ 珠内部/周围的反应。在本文中，我们将电位E从+1 V扫描到-1 V（负扫描），然后从-1 V扫描到+1 V（正扫描）来控制GO和TW之间的切换。我们发现从 TW 到 GO、E-TG 以及从 GO 到 TW、E-GT 的电转换电位取决于 E 的扫描方向和珠子的直径 d。本研究表明，电极诱导的 BZ 珠周围抑制剂 Br- 和激活剂 HBrO2 的增加在确定 E-TG 和 E-GT 中起着重要作用。
Various spatiotemporal patterns were created on the surface or in the body of cation-exchange resin beads which were loaded with the catalyst of the Belousov-Zhabotinsky (BZ) reaction. Either global oscillations (GO) or traveling waves (TW) and the switching between them were observed in the previous papers, but it was not clear how chemicals contribute to the reaction inside/around the BZ bead. In this paper, we scanned the electrical potential, E, from +1 to -1 V (negative scan) and then turned from -1 to +1 V (positive scan) to control the switching between GO and TW. We found that the electrical switching potential from TW to GO, E-TG, and from GO to TW, E-GT, depended on the scanning direction of E and the diameter of the bead, d. The present study suggests that the electrode-induced increase of the inhibitor, Br-, and the activator, HBrO2, around the BZ bead plays an important role in determining E-TG and E-GT.