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柔性W-O-C/碳气凝胶电极的制备和电催化氧化性能
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浙江工业大学

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国家自然科学基金(51871201);浙江省自然科学基金(LY16E010004)


Preparation and Electrocatalytic oxidation Performance ofFlexible W-O-C/Carbon Aerogel Electrodes
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Zhejiang University of Technology,College of Materials Science and Engineering

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    摘要:

    本研究使用细菌纤维素为前驱体制备碳气凝胶(CA),以其作为载体,通过浸渍和高温处理制得了柔性W-O-C/CA和WC/CA复合电极材料,研究了制备工艺对材料形貌、物相和对甲醇电催化氧化性能的影响。随着高温处理温度的上升和保温时间的延长,物相变化为:钨前驱体→钨氧化物(WO3、WO3-x、WO2)→W→WCx→WC。在700 ℃保温2 h制得的柔性电极,负载颗粒主要物相为缺氧钨氧化物(WO3-x)、WO2和少量碳化钨(WC),具有良好的甲醇电催化性能和长循环稳定性,0.8 V下电流密度为76.5 mA·cm-2,1000次循环后峰电流密度保持初始值的88%,有望用于便携式或微型甲醇燃料电池阳极。

    Abstract:

    In this study, carbon aerogel (CA) substrates were prepared by using bacterial cellulose as template, then flexible W-O-C/CA and WC/CA composite electrode materials were prepared by impregnation and high temperature treatment. The effects of preparation process on the phase, morphology and electrocatalytic performance of methanol were investigated. With the increase of heat treatment temperature and the extension of holding time, the phase change occur as tungsten precursor→tungsten oxide (WO3, WO3-x, WO2)→W→WCx→WC. For the flexible electrode prepared at 700 ℃ for 2 h, the phases of the supported particles are oxygen-deficient tungsten oxide (WO3-x) ,WO2 and tungsten carbide (WC). The electrode has good electrocatalytic performance for methanol oxidation (peak current density of 76.5 mA cm-2 at 0.8 V) and long-term cycling stability, the peak current density remains 88% of the initial value after 1000 cycles. This flexible electrode is expected to be used in the anode of portable or micro methanol fuel cell.

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沈忠伟,张健力,唐谊平,曹华珍,郑国渠,侯广亚.柔性W-O-C/碳气凝胶电极的制备和电催化氧化性能[J].稀有金属材料与工程,2023,52(4):1303~1310.[Shen Zhongwei, Zhang Jianli, Tang Yiping, Cao Huazhen, Zheng Guoqu, Hou Guangya. Preparation and Electrocatalytic oxidation Performance ofFlexible W-O-C/Carbon Aerogel Electrodes[J]. Rare Metal Materials and Engineering,2023,52(4):1303~1310.]
DOI:10.12442/j. issn.1002-185X.20220168

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  • 收稿日期:2022-03-04
  • 最后修改日期:2022-04-17
  • 录用日期:2022-04-26
  • 在线发布日期: 2023-05-01
  • 出版日期: 2023-04-25