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钙钛矿型氧化物La_(0.65)Sr_(0.3)MnO_3对氧还原的催化活性研究 被引量：3

Study on the catalytic activity of perovskite-type oxide La_(0.65)Sr_(0.3)MnO_3 for oxygen reduction
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摘要 用溶胶-凝胶法合成钙钛矿型氧化物La0.65Sr0.3MnO3(LSMO)纳米粉末,并采用XRD,动态光散射、透射电镜以及电化学方法对粉体进行结构和氧还原催化活性的表征.在0.1 mol/L的H2SO4中线性扫描测量,结果表明,掺了碳粉BP2000(20%(质量分数,w/w))的LSMO粉末对氧还原具有催化活性,氧还原的起始电位为0.5 V(vs.SCE).同时,还研究LSMO催化剂在酸性环境下的溶解度,与商业Pt/C催化剂相比,在酸中LSMO粉末的溶解度要高一个数量级,但其稳定性还有待进一步改善. A nanometer powder of perovskite-type oxides La0.65Sr0.3MnO3（LSMO） was synthesized by sol-gel method,and the structure and the catalytic activity for oxygen reduction of the resulting compound were characterized by powder X-ray diffraction,Dynamic light scattering,Transmission electron micrographs and electrochemical measurement.The result of the linear sweep indicated that with 20%（w/w） carbon powder BP2000,LSMO exhibited catalytic activity for oxygen reduction reaction in 0.1 mol·L-1 H2SO4,the onset potential was 0.5 V（vs SCE）.The solubility of LSMO in the acid environment was also studied.Comparing to commercial Pt/C catalyst,the solubility of LSMO in acid environment was larger by an order of magnitude,but the stability of LSMO needs further improvement.
作者 李丹林 李赏 潘牧
机构地区 武汉理工大学材料复合新技术国家重点实验室
出处 《湖北大学学报（自然科学版）》 CAS 北大核心 2011年第1期98-102,共5页 Journal of Hubei University：Natural Science
基金 国家自然科学基金项目(20803057)资助
关键词 燃料电池 非铂催化剂 氧还原 催化活性 fuel cell non-precious metal catalyst oxygen reduction reaction catalytic activity
分类号 TM911.4 [电气工程—电力电子与电力传动]
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参考文献14

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共引文献13

同被引文献28

  • 1卢旭东,姜承志,邵忠财.高分子凝胶网络法制备La_(0.65)Sr_(0.35)MnO_3及光催化性能[J].有色矿冶,2006,22(6):41-42. 被引量：4
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湖北大学学报（自然科学版）
2011年 第1期

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