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author:

Yang, Sen (Yang, Sen.) [1] | Huang, Zong-Xiong (Huang, Zong-Xiong.) [2] | Hou, Xiao-Heng (Hou, Xiao-Heng.) [3] | Cheng, Fang-Fang (Cheng, Fang-Fang.) [4] | Wu, Shao-Hua (Wu, Shao-Hua.) [5] | Sun, Jian-Jun (Sun, Jian-Jun.) [6]

Indexed by:

EI

Abstract:

A model is established for understanding the temperature change of an alternate hot and cold micro-band graphite electrode. It consists of two symmetrically placed thermoelectric coolers with an embedded graphite sheet as interlayer. By measuring the open circuit behaviors of a standard redox couple, the electrode surface temperature can be detected. And the electrode surface temperature can be regulated from 40 °C to - 10 °C in aqueous solution without freezing. The model is described as Qh = γh ΔT, Qc = γc ΔT, where the temperature change (ΔT) of electrode surface is assumed to be proportional to power of heating (Qh) or cooling (Qc). In addition, the diffusion activation energy of ferricyanide ion is firstly achieved by extending the temperature range from above zero degree down to the supercooled temperature (- 10 °C) with this specially designed electrode. Diffusion coefficient of ferricyanide ion is ca. 0.22 × 10- 5 cm2 s- 1 at - 10 °C, and activation energy is 23.2 kJ mol- 1. The experimental data are consistent with data obtained by Stokes-Einstein equation for the determination of diffusion coefficient and activation energy. © 2016 Elsevier B.V.

Keyword:

Activation energy Atmospheric temperature Diffusion Graphite Graphite electrodes Models Supercooling Surface properties Thermoelectric equipment

Community:

  • [ 1 ] [Yang, Sen]Ministry of Education Key Laboratory of Analysis and Determination for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou; 350108, China
  • [ 2 ] [Huang, Zong-Xiong]Ministry of Education Key Laboratory of Analysis and Determination for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou; 350108, China
  • [ 3 ] [Hou, Xiao-Heng]Ministry of Education Key Laboratory of Analysis and Determination for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou; 350108, China
  • [ 4 ] [Cheng, Fang-Fang]Ministry of Education Key Laboratory of Analysis and Determination for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou; 350108, China
  • [ 5 ] [Wu, Shao-Hua]Ministry of Education Key Laboratory of Analysis and Determination for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou; 350108, China
  • [ 6 ] [Sun, Jian-Jun]Ministry of Education Key Laboratory of Analysis and Determination for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection for Food Safety, College of Chemistry, Fuzhou University, Fuzhou; 350108, China

Reprint 's Address:

  • [sun, jian-jun]ministry of education key laboratory of analysis and determination for food safety, fujian provincial key laboratory of analysis and detection for food safety, college of chemistry, fuzhou university, fuzhou; 350108, china

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Source :

Electrochemistry Communications

ISSN: 1388-2481

Year: 2016

Volume: 68

Page: 71-75

4 . 3 9 6

JCR@2016

4 . 7 0 0

JCR@2023

ESI HC Threshold:235

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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