CAJ | 학술논문

以丙烯酰胺辅助柠檬酸为络合试剂，采用溶胶-凝胶燃烧法制备 La0.6 Sr0.4 Co1- x Mnx O3催化剂（x =0.3、0.5、0.7）并与 LaCoO3进行比较，进行 XRD、BET、SEM、XPS 和苯的催化氧化性能和稳定性表征。结果表明，催化活性顺序为：La0.6 Sr0.4 Co0.7 Mn0.3 O3> La0.6 Sr0.4 Co0.5 Mn0.5 O3> La0.6 Sr0.4 Co0.3 Mn0.7 O3> LaCoO3。La0.6 Sr0.4 Co1- x Mnx O3催化剂生成钙钛矿相的同时还伴生少量 SrCO3杂相。与 LaCoO3对比，La0.6 Sr0.4 Co1- x Mnx O3催化剂拥有更大的比表面积、孔容和抗团聚性，具有更好的催化氧化活性。在 La0.6 Sr0.4 Co1- x Mnx O3（x =0.3、0.5、0.7）催化剂中，La0.6 Sr0.4 Co0.7 Mn0.3 O3催化剂比其他两种催化剂具有更高的钙钛矿相结晶度和更多的表面吸附氧与晶格氧，活性最高。78 h 稳定性测试结果表明，La0.6 Sr0.4 Co0.7 Mn0.3 O3催化剂表现出良好的稳定性。
이병희선알보조저몽산위락합시제，채용용효-응효연소법제비 La0.6 Sr0.4 Co1- x Mnx O3최화제（x =0.3、0.5、0.7）병여 LaCoO3진행비교，진행 XRD、BET、SEM、XPS 화분적최화양화성능화은정성표정。결과표명，최화활성순서위：La0.6 Sr0.4 Co0.7 Mn0.3 O3> La0.6 Sr0.4 Co0.5 Mn0.5 O3> La0.6 Sr0.4 Co0.3 Mn0.7 O3> LaCoO3。La0.6 Sr0.4 Co1- x Mnx O3최화제생성개태광상적동시환반생소량 SrCO3잡상。여 LaCoO3대비，La0.6 Sr0.4 Co1- x Mnx O3최화제옹유경대적비표면적、공용화항단취성，구유경호적최화양화활성。재 La0.6 Sr0.4 Co1- x Mnx O3（x =0.3、0.5、0.7）최화제중，La0.6 Sr0.4 Co0.7 Mn0.3 O3최화제비기타량충최화제구유경고적개태광상결정도화경다적표면흡부양여정격양，활성최고。78 h 은정성측시결과표명，La0.6 Sr0.4 Co0.7 Mn0.3 O3최화제표현출량호적은정성。
La0. 6 Sr0. 4 Co1 - x Mnx O3 catalysts(x = 0. 3,0. 5,0. 7)were prepared using acrylamide assisted polymeric citrate combustion route,and their catalytic performance for complete oxidation of benzene was investigated. The catalysts were characterized by means of N2 physical adsorption,X-ray diffraction,scanning electron microscopy and X-ray photoelectron spectroscopy. The results showed that the order of catalytic activity was as follows:La0. 6 Sr0. 4 Co0. 7 Mn0. 3 O3 > La0. 6 Sr0. 4 Co0. 5 Mn0. 5 O3 > La0. 6 Sr0. 4 Co0. 3 Mn0. 7 O3 >LaCoO3 . La0. 6 Sr0. 4 Co1 - x Mnx O3 catalysts(x = 0. 3,0. 5,0. 7)possessed perovskite crystal phase together with minor SrCO3 . Compared with LaCoO3 ,La0. 6 Sr0. 4 Co1 - x Mnx O3 catalysts had greater specific surface area, bigger pore volume and less particle aggregation. La0. 6 Sr0. 4 Co0. 7 Mn0. 3 O3 catalyst had higher crystallinity degree and more adsorbed oxygen and lattice oxygen than La0. 6 Sr0. 5 Co0. 5 Mn0. 3 O3 and La0. 6 Sr0. 4 Co0. 3 Mn0. 7 O3 catalysts. Therefore,La0. 6 Sr0. 4 Co0. 7 Mn0. 3 O3 exhibited good stability for benzene complete catalytic oxidation during the stability test for 78 h.