Analysis system for in-situ electrochemistry-mass spectrometry combination
An in-situ electrochemical and analysis system technology, which is applied in the detection and analysis field of in-situ detection of electrochemical and mass spectrometry signals, can solve problems such as no solutions, and achieve easy installation and disassembly, easy collection, and broad application prospects Effect
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Embodiment 1
[0030] For the detection and research of the reaction mechanism of the electrodes for the electro-oxidation of formic acid, the electrochemical cell 7 and the liquid storage tank 11 were injected with 0.5 mol / L sulfuric acid + 0.5 mol / L formic acid. Turn on the sampling pump and the sampling pump, the pump flow rate is 100mL / min, keep the electrolyte flowing, so that the three electrodes are connected in the electrochemical cell. At the same time, after the mass spectrometer starts to scan the blank baseline and stabilizes, then perform electrochemical potential scanning, collect the product through the mass spectrometer inlet and analyze and detect its mass spectrum signal, such as figure 2 shown. figure 2 .From the in situ real-time mass spectrometry detection of the product of electrocatalyzed formic acid, in the process of cyclic voltammetry potential scanning, the mass spectrometry signal of carbon dioxide was detected in both positive scanning and negative scanning. Co...
Embodiment 2
[0032] For the detection and research of the reaction mechanism of the electrode to the electrooxidation of methanol, the electrochemical cell 7 and the liquid storage tank 11 were injected with 0.5 mol / L sulfuric acid + 0.5 mol / L methanol. Turn on the sampling pump and the sampling pump, the pump flow rate is 100mL / min, keep the electrolyte flowing, so that the three electrodes are connected in the electrochemical cell. At the same time, after the mass spectrometer starts to scan the blank baseline and stabilizes, then perform electrochemical potential scanning, collect the product through the mass spectrometer inlet and analyze and detect its mass spectrum signal, such as image 3 shown. image 3 From the in situ real-time mass spectrometry detection of the product of electrocatalyzed methanol, CO 2 The ion current is the largest, followed by CHOOH and CH 3 COOH, combined with other characterization techniques, it can be speculated that in the process of electrocatalytic o...
Embodiment 3
[0034] For detecting and studying the reaction mechanism of the electrode to the electrooxidation of ethanol, the electrochemical cell 7 and the liquid storage tank 11 are injected with 0.5 mol / L sulfuric acid + 0.5 mol / L ethanol. Turn on the sampling pump and the sampling pump, the pump flow rate is 100mL / min, keep the electrolyte flowing, so that the three electrodes are connected in the electrochemical cell. After the mass spectrometer starts to scan the blank baseline and stabilizes, then perform electrochemical potential scanning, collect the product through the mass spectrometer inlet and analyze and detect its mass spectrum signal, such as Figure 4 shown. Figure 4 From the in situ real-time mass spectrometry detection of the product of electrocatalytic ethanol, it can be seen that in the process of electrocatalytic oxidation of ethanol to carbon dioxide, there will be CH 3 COOH is generated, additional CH 3 CH 2 The OH signal is caused by the volatilization of a sm...
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