黎方正1,2,周秋兰1,欧恩才1,徐伟箭1.溶胶凝胶法制备Pd/rGO纳米复合材料[J].湖南大学学报:自然科学版,2017,44(12):103~107
溶胶凝胶法制备Pd/rGO纳米复合材料
Preparation of Pd/rGO Nano Composites by Sol-gel Method
  
DOI:
中文关键词:  还原氧化石墨烯  溶胶凝胶法  燃料电池  电催化
英文关键词:reduced graphene  sol-gel method  fuel cells  electrocatalysis
基金项目:
作者单位
黎方正1,2,周秋兰1,欧恩才1,徐伟箭1 (1.湖南大学 化学化工学院,湖南 长沙 410082
2.中南大学 信息科学与工程学院湖南 长沙 410083) 
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中文摘要:
      利用改性的Hummer法制备氧化石墨烯分散液,以氯化钯为原料制备硝酸钯,两者通过搅拌形成均匀稳定的水溶胶,控制反应温度使其凝胶化,复合材料凝胶冻干之后使用NaBH4对其进行还原,制得Pd/rGO复合材料.通过SEM和XRD两种表征方法对Pd/rGO复合材料的形貌和结构进行了分析.采用循环伏安法、计时电流曲线方法研究了复合材料对于甲醇氧化反应的催化性能和电化学稳定性.研究结果表明:采用溶胶-凝胶法制备的复合材料对于甲醇氧化反应具有良好的催化性能和电化学稳定性.通过探索反应条件,得到制备Pd/rGO复合材料的优化反应条件为:钯的质量分数为40%,尿素用量为100 mg.
英文摘要:
      The graphene oxide hydrosol was prepared by modification of the Hummer method. The palladium chloride was taken as the raw material to prepare palladium nitrate. By stiring,a uniformity and stable hydrosol was formed by mixing the graphene oxide hydrosol and palladium nitrate. Pd nanoparticles supported on the rGO were successfully synthesized after the process of freezing-drying and reducing by NaBH4. The morphology and structure of Pd/RGO nanohybrids were characterized by SEM and XRD. The electrocatalytic property for methanol oxidation and electrochemical stability was characterized by CV and CA. Compared with the Pd/rGO prepared by co-reduction,Pd/rGO prepared by sol-gel method has better electrocatalytic activity and electrochemical stability. After exploring the reaction conditions,the optimizing reaction conditions of preparation of Pd/rGO composites was:palladium mass fraction of 40%,urea dose of 100 mg.
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