Electrochemical Properties of  SiW11O39Fe(Ⅲ)(H2O)5- and Its Electrocatalysis for H2O2 Reduction

HUA Yingjie; WANG Chongtai; LIU Xilong; WU Chunyan; ZHOU Fang; MAO Yanchao; LIU Xiaoyang

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Electrochemical Properties of SiW₁₁O₃₉Fe(Ⅲ)(H₂O)^5-and Its Electrocatalysis for H₂O₂ Reduction

更新时间：2023-12-11

- Electrochemical Properties of SiW₁₁O₃₉Fe(Ⅲ)(H₂O)^5-and Its Electrocatalysis for H₂O₂ Reduction
- Acta Scientiarum Naturalium Universitatis SunYatseni Vol. 51, Issue 3, Pages: 73-78(2012)
- 作者机构：
  
  1. 海南师范大学化学与化工学院,海南,海口,571158
  2. 中山大学化学与化工学院,广东,广州,510275
  3. 吉林大学无机合成与制备国家重点实验室,吉林,长春,130012
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2012，
  
  Published Online：25 May 2012，
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HUA Yingjie, WANG Chongtai, LIU Xilong, et al. Electrochemical Properties of SiW₁₁O₃₉Fe(Ⅲ)(H₂O)^5-and Its Electrocatalysis for H₂O₂ Reduction. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 51(3):73-78(2012)
DOI：

HUA Yingjie, WANG Chongtai, LIU Xilong, et al. Electrochemical Properties of SiW₁₁O₃₉Fe(Ⅲ)(H₂O)^5-and Its Electrocatalysis for H₂O₂ Reduction. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 51(3):73-78(2012) DOI：

摘要

用循环伏安和交流阻抗等方法详细研究了SiW

Fe(Ⅲ)(H

(SiW

Fe)的电化学性质和对H

还原的间接电催化作用，并与PW

Fe(Ⅲ)(H

(PW

Fe)进行了比较，同时提出了电催化反应的机理。实验结果表明，与PW

Fe 类似，SiW

Fe在酸性水溶液中也有3对还原氧化伏安响应，分别归属于Fe(Ⅲ)/Fe(Ⅱ)电对和W-O骨架的还原氧化反应。但SiW

Fe的3对还原氧化波的峰电位与PW

Fe)相比明显负移，且均受溶液pH的影响。SiW

Fe中Fe(Ⅲ)/Fe(Ⅱ)电对传递电子的可逆性比PW

Fe的差，但同样对H

的还原具有明显的电催化作用，并受溶液pH的影响。随着溶液pH的增加，Fe波和W-O骨架波的还原氧化峰电位均负移，Fe波对H

还原的电催化活性降低甚至被完全抑制，相反，第一个W-O骨架波对H

的还原却有明显的电催化作用。

Abstract

Electrochemical properties of SiW

Fe(Ⅲ)(H

(SiW

Fe) and its electrocatalysis for H

reduction in a solution of 0.1 mol·L

-1

NaHSO

+ Na

were investigated in detail using the electrochemical methods such as cyclic voltammetry and AC impedance etc. At the same time

a comparison with PW

Fe(Ⅲ)(H

(PW

Fe) was made and an indirect electrocatalysis mechanism was proposed. Experimental results indicated that SiW

Fe possesses three pairs of redox waves attributed to the voltammetric responses of the Fe(Ⅲ)/Fe(Ⅱ) redox couple and the W-O skeleton

respectively

similar to PW

Fe. Compared with PW

all peak potentials of the three pairs of redox waves moved obviously to negative direction for SiW

Fe and were affected by the solution pH. The Fe(Ⅲ)/Fe(Ⅱ) redox couple of SiW

Fe has a worse reversibility of electron transfer than that of PW

but similarly exhibit a high electrocatalytic activity for H

reduction

which was affected by the solution pH. With increasing of the solution pH

the redox peak potentials of the Fe wave and W-O waves shifted negatively; the electrocatalytic activity of the Fe wave towards H

reduction declined or even was completely inhibited. Instead

the first W-O skeleton wave showed a distinct electrocatalysis for H

reduction.

关键词

Fe(Ⅲ)取代硅钨杂多阴离子电催化循环伏安交流阻抗H2O2

Keywords

Fe(Ⅲ)-substituted heteropolyanionelectrocatalysiscyclic voltammetryalternating current impedanceH2O2

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

College of Chemistry and Chemical Engineering, Hunan University

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