高等学校化学学报2018，Vol.39Issue(3)：416-421,6.DOI:10.7503/cjcu20170497
缺陷调控对钙钛矿结构锰酸镧催化性质的影响
Effect of Defect Tuning on the Catalytic Behavior of Perovskite Structure Lanthanum Manganite
摘要
Abstract
In this paper,lanthanum manganite with perovskite structure was chosen as a model compound of which the valence of Mn and oxygen defects were tuned by introducing A-site defect. Electrochemical catalytic oxygen evolution reaction(OER)and catalytic oxidation of CO were performed to evaluate the relationship between the defects and catalytic properties. All the samples were prepared via a sol-gel method, and the composition was determined by ICP-OES. The valence of Mn was titrated by iodometric method. The oxygen defect(δ)was calculated according to the principle of neutrality. The chemical formulas of the samples were La0.85MnO2.85,La0.80MnO2.81 and La0.75MnO2.74, respectively. The structure, binding energy of Mn and mor-phology of the samples were characterized by X-ray diffraction(XRD), X-ray photoelectron spectroscopy (XPS)and scanning electron microscopy(SEM). The specific surface area of the samples was determined by physical adsorption. The OER results indicated a linear relationship between the concentration of defect and OER property,while the La0.80MnO2.81 sample showed the best CO catalytic property.关键词
氧缺陷/锰酸镧/电催化析氧反应/一氧化碳催化氧化Key words
Oxygen defect/lanthanum manganite/Oxygen evolution reaction(OER)/Catalytic oxidation of CO分类
化学化工引用本文复制引用
蒋一兰,袁龙,王西阳,黄科科,冯守华..缺陷调控对钙钛矿结构锰酸镧催化性质的影响[J].高等学校化学学报,2018,39(3):416-421,6.基金项目
国家自然科学基金(批准号:21427802,21671076,21621001)资助.Supported by the National Natural Science Foundation of China(Nos.21427802,21671076,21621001). （批准号:21427802,21671076,21621001）
