Development of a Novel Mass Spectrometer for in situ Detection of Electrochemical and Photochemical Products in Solutions.

开发用于原位检测溶液中电化学和光化学产品的新型质谱仪。

• 批准号: 04555195
• 负责人: FUJIHIRA Masamichi
• 金额: $ 12.35万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04555195/
• 关键词: Mass spectrometer; Electrochemistry; Photochemistry; Chemistry in electric discharge; in situ measurements; A rotational flow; Electroluminescence devices; Nano-processing; 質量分析; DEMS; DPMS; 光触媒; 水の光分解; CO2固定; 触媒反応; CO_2固定; 電気化学反応のその場測定

The main object of this research is to develop a novel mass spectrometer for in situ detection of products of electrochemical and photochemical processes in solutions, which cannot be detected conventional mass spectrometer. It was found from the present research that the new method can be used to study the reaction mechanisms of electrochemical and photochemical processes such as CO_2 reduction and water oxidation and also can be used to develop new catalysts.Furthermore in the present research, we have studied the followings for developing new instruments for practical use : 1) improvement in response time by accelerating mass-transport of reactants and products and by increasing evacuation rate ; 2) examination of selective permeation of products through a membrane between a solution and vacuum for mass spectrometry ; 3) improvement in sensitivity by accelerating mass-transport and by decreasing disturbance of solvents ; 4) modification of electrochemical and photochemical cells for the mass spectrometer. In addition, application of the present method to other fields was also examined. It was found that a small amount of gaseous products during performance of organic electroluminescence (EL) devices can be detected. The results were useful to study degradation mechanism of EL devices and will be used to improve the lifetime of EL devices. Application of the present method to the study of chemical processes during nano-processing was also investigated.

本研究的主要目的是开发一种新型的质谱仪，用于现场检测溶液中电化学和光化学过程的产物，这是传统质谱仪无法检测到的。本研究发现，该方法可用于研究CO_2还原、水氧化等电化学和光化学过程的反应机理，也可用于开发新的催化剂。此外，本研究还从以下几个方面进行了研究：1)通过加速反应物和产物的传质和提高抽空率来改善响应时间；2)考察了产物通过溶液和真空之间的膜的选择性渗透以进行质谱分析；3)通过加速传质和减少溶剂的干扰来提高灵敏度；4)对质谱仪的电化学池和光化学池进行了改进。此外，还考察了该方法在其他领域的应用。发现在有机电致发光(EL)器件的工作过程中可以检测到少量的气态产物。研究结果有助于研究EL器件的退化机理，并将用于提高EL器件的寿命。并探讨了本方法在纳米加工过程化学过程研究中的应用。

项目成果

M.Fujihira: "Organic Thin Films and Surfaces" ed.by A.Ulman,Academic Press(in press),

M.Fujihira：“有机薄膜和表面”，A.Ulman 编，学术出版社（正在印刷中），

Masamichi Fujihira: "A Novel Differential Electrochemical Mass Specroscopy(DEMS)with a Stationary Gas-permeable Electrode in a Rotational Flow Produced by a Rotating Rod" J.Electroanal.Chem.347. 457-463 (1993)

Masamichi Fujihira：“一种新型差分电化学质谱 (DEMS)，在旋转杆产生的旋转流中具有固定透气电极”J.Electroanal.Chem.347。

M.Fujihira and T.Noguchi: "A novel differential electrochemical mass spectrometer(DEMS)with a stationary gas permeable electrode in a rotational flow produced by a rotating rod" J.Electroanal.Chem.(1993)

M.Fujihira 和 T.Noguchi：“一种新颖的差分电化学质谱仪 (DEMS)，在旋转杆产生的旋转流中具有固定的透气电极”J.Electroanal.Chem.(1993)

Masamichi Fujihira and Toshimitsu Noguchi: "A Novel Differential Electrochemical Mass Specroscopy (DEMS) with a Stationary Gas-permeable Electrode in a Rotational Flow Produced by a Rotating Rod" J.Electroanal.Chem.347. 457-463 (1993)

Masamichi Fujihira 和 Toshimitsu Noguchi：“在旋转杆产生的旋转流中采用固定透气电极的新型差分电化学质谱 (DEMS)”J.Electroanal.Chem.347。

Lee-Mi Do M.Fujihira et.al.: "Observation of degradation processes of Al electrodes on organic EL devices by EL microscopy,AFM,SEM, and Auger electron spectroscopy" J.Appl.Phys.76. 5118-5121 (1994)

Lee-Mi Do M.Fujihira 等人：“通过 EL 显微镜、AFM、SEM 和俄歇电子能谱观察有机 EL 器件上铝电极的降解过程”J.Appl.Phys.76。