文章摘要
王成,黄红霞,肖阳,梁大铭.石墨烯/Sr2Ni0.4Co1.6O6复合材料的制备及其性能[J].精细化工,2019,36(7):
石墨烯/Sr2Ni0.4Co1.6O6复合材料的制备及其性能
Preparation and Properties of Graphene/ Sr2Ni0.4Co1.6O6 Composites
投稿时间:2018-12-04  修订日期:2019-01-24
DOI:
中文关键词: 石墨烯  双钙钛矿氧化物  电化学性能  双功能催化剂
英文关键词: graphene  double perovskite oxide  electrochemical properties  bifunctional catalyst
基金项目:广西自然科学基金(2016GXNSFAA380201);广西电磁化学功能物质重点实验室研究基金资助(EMFM20161103)
作者单位E-mail
王成 桂林理工大学 178654909@qq.com 
黄红霞 桂林理工大学 hhxhunan@126.com 
肖阳 桂林理工大学  
梁大铭 桂林理工大学  
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中文摘要:
      通过溶胶-凝胶法合成双钙钛矿型氧化物Sr2Ni0.4Co1.6O6,通过改性Hummers还原方法制备出薄层石墨烯,并制备单一物质和两者复合材料的双功能氧电极,用于测试其氧催化性能。XRD、EDS、SEM、红外光谱表征得出,Sr2Ni0.4Co1.6O6均匀的分布于薄层石墨烯片层表面。电化学性能测试表明,单一Sr2Ni0.4Co1.6O6和薄层石墨烯的氧还原反应(ORR)最大电流密度分别为183.0 mA/cm2、151.6 mA/cm2 (-0.6 V vs Hg/HgO),氧析出反应(OER)最大电流密度为267.7 mA/cm2、117.4 mA/cm2 (1 V vs Hg/HgO)。当薄层石墨烯添加量占复合催化剂重量比10 %时,复合催化剂的氧催化性能最佳,ORR最大电流密度为290.1 mA/cm2 (-0.6 V vs Hg/HgO),OER最大电流密度为390.5 mA/cm2 (1 V vs Hg/HgO),明显高于单一催化剂。表明复合材料具有优异的氧催化性能。
英文摘要:
      Sr2Ni0.4Co1.6O6 double perovskite oxide was prepared by sol-gel method, and thin layer graphene was pre-pared by modified Hummers reduction method. They were synthesized as catalysts for bifunctional cata-lysts, and used to test its oxygen catalytic performance. The analysis results (XRD, EDS, SEM, IR etc) in-dicate that Sr2Ni0.4Co1.6O6 is homogeneously dispersed on the surface of graphene layers. Electrochemical performance tests show that the maximum current densities of single Sr2Ni0.4Co1.6O6 and thin layer gra-phene oxygen reduction reaction (ORR) are 183.0 mA/cm2 and 151.6 mA/cm2 (-0.6 V vs Hg/HgO), respec-tively, and the maximum current densities of the oxygen evolution reaction (OER) are 267.7 mA/cm2 and 117.4 mA/cm2(1 V vs Hg/HgO). When the amount of thin layer graphene add is 10 % of the mass of the composite catalyst, the composite catalyst has the best oxygen catalytic performance, the maximum cur-rent density of ORR is 290.1 mA/cm2(-0.6 V vs Hg/HgO), and the maximum current density of OER is 390.5 mA/cm2(1 V vs Hg/HgO). It shows that the composite has excellent oxygen catalytic performance than the single catalyst.
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