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Pulsed potential gas sensors

A gas sensor, potential technology, applied in instruments, scientific instruments, electrochemical variables of materials, etc., can solve problems such as long time

Active Publication Date: 2018-07-17
MSA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Second, the time between pulses should be long, allowing the charging current to decay to a small value

Method used

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  • Pulsed potential gas sensors
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  • Pulsed potential gas sensors

Examples

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Embodiment Construction

[0043] It will be readily appreciated that portions of the embodiments as generally described and shown in the drawings herein may be arranged and designed in a wide variety of different configurations beyond the representative embodiments described. Accordingly, the following more detailed description of representative embodiments as shown in the accompanying drawings is not intended to limit the scope of the embodiments as claimed, but is merely an illustration of representative embodiments.

[0044] Reference throughout this specification to "one embodiment" or "an embodiment" (and so on) means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" (and so on) in various places throughout this specification are not necessarily all referring to the same embodiment.

[0045] Furthermore, the described features, structu...

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Abstract

A method of operating an electrochemical gas sensor, which includes at least one working electrode including an electrocatalyst and having a ratio of total electrochemically accessible surface area togeometrical surface area of at least 2: 1, includes alternatively biasing a potential of the at least one working electrode to a first potential at which the electrocatalyst is active to catalyze a redox reaction of a first target gas and to a second potential, different from the first potential, at which the electrocatalyst is substantially inactive to catalyze the redox reaction of the first target gas, a plurality of times, measuring a first output signal arising from the redox reaction of the first target gas at the first potential, and deconvoluting the first output signal while the at least one working electrode is biased at the first potential to separate a portion of the first output signal arising from non-faradaic current to determine a concentration of the first target gas.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Patent Application Serial No. 14 / 976,034, filed December 21, 2015, the disclosure of which is incorporated herein by reference. Background technique [0003] The following information is provided to assist the reader in understanding the techniques disclosed below and the environments in which such techniques may typically be applied. The terms used herein are not intended to be limited to any particular narrow interpretation, unless expressly stated otherwise in this document. The references given in this article may be helpful in understanding the technology and its background. The disclosures of all references cited herein are incorporated by reference. [0004] Pulse electrochemical techniques are well known. Pulsed voltammetry can lower detection limits in electrochemical analyses. In a typical electrochemical cell, two types of currents are observed, which are referred...

Claims

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Application Information

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IPC IPC(8): G01N27/404
CPCG01N27/4045G01N27/30
Inventor T·B·谢弗勒
Owner MSA TECH
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