Developmert of Scanning Chemical Potertial Microscope

扫描化学势显微镜的研制

• 批准号: 11555172
• 负责人: KAWADA Tatsuya
• 金额: $ 8.83万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555172/
• 关键词: scannning chemical potential microscope; scanning probe microscope; micro thermal analyzer; porous oxygen sensor (POS); chemical sensor; solid electrolyte; surface oxygen potential; electrode reaction; 化学ポテンシャル顕微鏡; 酸素センサ; 走査プロープ顕微鏡

The objective of this research has been to develop a "scanning chemical potential microscope" that measures the chemical potential profiles on catalysts or electrodes in order to investigate the reaction kinetics. In this research project, we have invented an oxygen potential probe, and applied it for the investigation of gas electrode reaction on a solid oxide electrolyte.(1)The concept of Porous Oxygen Sensor (POS), was developed. Stabilized zirconia or ceria was sintered into a porous pellet, and put on a sample surface. Oxygen potential on the sample surface was measured against a Pt reference electrode that was applied on the other side of POS by a potentiometric method.(2) The POS method was successfully applied to the kinetic study of oxygen incorporation reaction through a mixed ionic / electronic conductor electrode. The overvoltage for the two surface reaction processes were determined by using POS.(3) Kinetic model and the parameters obtained by POS were quite reasonable, proving that POS method is usable for a quantitative analysis.(4) POS microprobes were fabricated by coating zirconia powders on Pt based metal wires. The topologically identical structure with normal POS was realized in a micrometer space. A commercial probe for micro thermal analysis was used as a fine Pt-Rh probe base. It was coated with YSZ in two methods, i.e. slurry coating and thermal decomposition of metal organic precursors. By the latter method, a fine probe with lateral resolution higher than one micron was fabricated.(5) Sample heating stage was fabricated for the in-situ measurements of YSZ based electrolyte. It was installed on an atomic force micro probe scanner, and operated at 700 ℃.(6) Space resolved analysis of surface oxygen potential was successfully performed on a LaMnO3 based electrode.

这项研究的目的是开发一种“扫描化学势显微镜”，用于测量催化剂或电极上的化学势分布，以研究反应动力学。在这个研究项目中，我们发明了一种氧电位探针，并将其应用于固体氧化物电解质上的气体电极反应的研究。(1)提出了多孔氧传感器(POS)的概念。将稳定的氧化锆或二氧化铈烧结成多孔颗粒，并放在样品表面上。通过电位法测量样品表面的氧电位，将铂参比电极施加在POS的另一侧。(2)POS方法成功应用于离子/电子混合导体电极的氧掺入反应动力学研究。利用POS测定了两个表面反应过程的过电压。(3)动力学模型和POS获得的参数相当合理，证明POS方法可用于定量分析。(4)通过在Pt基金属丝上涂覆氧化锆粉末制备POS微探针。在微米空间内实现了与普通POS拓扑相同的结构。用于微热分析的商业探针被用作精细的 Pt-Rh 探针底座。采用浆料涂覆和金属有机前驱体热分解两种方法对YSZ进行涂覆。通过后一种方法，制作出了横向分辨率高于1微米的精细探针。(5)制作了样品加热台，用于YSZ基电解液的原位测量。将其安装在原子力微型探针扫描仪上，并在700℃下运行。(6)在LaMnO3基电极上成功进行了表面氧势的空间分辨分析。

项目成果

T.Kawada: "A NoveI Technique for lmaging Electrochemical Reaction Sites on a Solid Oxide Electrolyte"Solid State Ionics. (掲載予定). (2000)

T.Kawada：“一种对固体氧化物电解质上的电化学反应位点进行成像的新技术”固态离子学（即将出版）。

T.Kawada et al.: "Surface Reaction Kinetics of Oxygen on Lal-xSrxCoO3-d Cathode"Electrochem. Soc. Proc.. 2001-16. 529-538 (2001)

T.Kawada 等人：“Lal-xSrxCoO3-d 阴极上氧的表面反应动力学”Electrochem。

T.Kawada: "A Novel Technique for Imaging Electrochemical Reaction Sites on a Solid Oxide Electrolyte"Solid State Ionics. 131. 199-210 (2000)

T.Kawada：“一种对固体氧化物电解质上电化学反应位点进行成像的新技术”固态离子学。

T. Kawada et al.: "A Novel Technique for Imaging Electrochemical Reaction Sites on a Solid Oxide Electrolyte"Solid State Ionic. 131. 199-210 (2000)

T. Kawada 等人：“一种对固体氧化物电解质上电化学反应位点进行成像的新技术”固态离子。

T.Kawada: "Electrochemically Induced Non-equilibrium Oxygen on a Solid Oxide Electrolyte"Trans.Mater.Res.Soc.Jpn.. 25(1). 51-54 (2000)

T.Kawada：“固体氧化物电解质上的电化学诱导非平衡氧”Trans.Mater.Res.Soc.Jpn.. 25(1)。