【摘 要】
：
Differential electrochemical mass spectrometry (DEMS) is one of the most powerful techniques for both the mechanistic and kinetic study of complicated electroca
【机 构】
：
Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemical Physics, Unive
论文部分内容阅读
Differential electrochemical mass spectrometry (DEMS) is one of the most powerful techniques for both the mechanistic and kinetic study of complicated electrocatalytic reactions.It can provide information on the nature and yields of the products generated,their production rate,and the structure-activity relationship between the electrocatalysts and the target reactions.The precise calibration of the mass signal is a prerequisite for the accurate evaluation of reaction kinetics.In this work,we use the oxidation reactions of CO and HCOOH to demonstrate how certain conditions,such as the flow rate and solution composition,affect the collection efficiency and ionization probability of the species to be detected.These parameters can affect the determination of the mass calibration constant and the accuracy of the subsequent quantitative DEMS analysis.We show the relationship between the mass calibration constant and the flow rate,and provide strategies for eliminating this and the related problems.
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