Crystal phase formation mechanism and electrocatalytical properties of WC/TiO<sub>2</sub> nanocomposites

WANG Xiaojuan; MAO Xinbiao; LI Guohua; MA Chun'an

doi:10.11949/j.issn.0438-1157.20160531

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Crystal phase formation mechanism and electrocatalytical properties of WC/TiO₂ nanocomposites

更新时间：2025-12-10

- Crystal phase formation mechanism and electrocatalytical properties of WC/TiO₂ nanocomposites
- CIESC Journal Issue 11, Pages: 4873-4877(2016)
- 作者机构：
  
  1. 宁波检验检疫科学技术研究院,浙江,宁波,315012
  2. 浙江工业大学化学工程与材料学院, 绿色化学合成技术国家重点实验室培育基地,浙江,杭州,310032
  3. 宁波出入境检验检疫局,浙江,宁波,315012
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160531
  CLC： 646
- Online First：05 November 2016，
  
  Published：05 November 2016
- 稿件说明：
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WANG Xiaojuan, MAO Xinbiao, LI Guohua, et al. Crystal phase formation mechanism and electrocatalytical properties of WC/TiO₂ nanocomposites[J]. CIESC Journal, 2016, (11): 4873-4877. DOI: 10.11949/j.issn.0438-1157.20160531.
DOI：

WANG Xiaojuan, MAO Xinbiao, LI Guohua, et al. Crystal phase formation mechanism and electrocatalytical properties of WC/TiO₂ nanocomposites[J]. CIESC Journal, 2016, (11): 4873-4877. DOI: 10.11949/j.issn.0438-1157.20160531. DOI：

摘要

以金红石相纳米TiO2为载体，偏钨酸铵为钨源，采用表面修饰技术制备了纳米复合材料的前体，将前体在甲烷/氢气气氛下还原碳化并采用XRD对其进行表征，研究了还原碳化温度、时间对纳米复合材料晶相组成的影响，并探讨了WC/TiO2纳米复合材料的形成机理。通过扫描电子显微镜、热重-差热分析等手段对WC/TiO2纳米复合材料的形态结构和热稳定性进行了表征。采用循环伏安法研究了纳米复合材料物相组成与电催化性能之间的关系，结果表明由WC和TiO2两相组成的WC/TiO2纳米复合材料对对硝基苯酚电还原反应的电催化性能最佳。

Abstract

Tungsten carbide and titania (WC/TiO2) nanocomposites were fabricated by surface modification of rutile titania reacting with ammonium metatungstate and followed by in situ reduction and carburization of the modified rutile in CH4/H2 atmosphere. The influence of temperature and time of in situ reduction and carburization on phase structures of WC/TiO2 nanocomposites were investigated by XRD characterization on nanocomposites

and the formation mechanism of crystal phases in WC/TiO2 nanocomposites was discussed. The morphology and thermal stability of WC/TiO2 nanocomposites were studied by SEM and TG-DTA

respectively. Electrocatalytical properties of the WC/TiO2 nanocomposites with different phase structures were investigated by cyclic voltammetry. Results showed that WC/TiO2 nanocomposites composed of both WC and TiO2 crystal phase exhibited the best catalytic activity for p-nitrophenol (PNP) electroreduction.

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Crystal phase formation mechanism and electrocatalytical properties of WC/TiO2 nanocomposites

DOI：10.11949/j.issn.0438-1157.20160531

摘要

Abstract

关键词

Keywords

references

Crystal phase formation mechanism and electrocatalytical properties of WC/TiO₂ nanocomposites