Evaluation of selectivity of commercial hydrogen sensors

Palmisano, V.; Boon-Brett, L.; Bonato, Christian; Harskamp, Frederik; Buttner, William J.; Post, Matthew; Burgess, Robert M.; Rivkin, Carl

doi:10.1016/j.ijhydene.2014.03.251

Cited by 26 publications

(14 citation statements)

References 9 publications

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“…This is a continuation of previous work, which analyzed the effect of potential interferents on these and other sensor types [9]. Detailed descriptions of the detection principles of the various hydrogen detection platforms has been presented elsewhere, e.g.…”

Section: Introductionmentioning

confidence: 76%

Selectivity and resistance to poisons of commercial hydrogen sensors

Palmisano

Weidner

Boon-Brett

et al. 2015

International Journal of Hydrogen Energy

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PoisonsInhibitors Interferents a b s t r a c tThe resistance of several models of catalytic, workfunction-based metal-oxide-semiconductor and electrochemical hydrogen sensors to chemical contaminants such as SO 2, H 2 S, NO 2 and hexamethyldisiloxane (HMDS) has been investigated. These sensor platforms are among the most commonly used for the detection of hydrogen. The evaluation protocols were based on the methods recommended in the ISO 26142:2010 standard. Permanent alteration of the sensor response to the target analyte (H 2 ) following exposure to potential poisons at the concentrations specified in ISO 26142 was rarely observed.Although a shift in the baseline response was often observed during exposure to the potential poisons, only in a few cases did this shift persist after removal of the contaminants.Overall, the resistance of the sensors to poisoning was good. However, a change in sensitivity to hydrogen was observed in the electrochemical platform after exposure to NO 2 and for a catalytic sensor during exposure to SO 2 . The siloxane resistance test prescribed in ISO 26142, based on exposure to 10 ppm HMDS, may possibly not properly reflect sensor robustness to siloxanes. Further evaluation of the resistance of sensors to other Si-based contaminants and other exposure profiles (e.g., concentration, exposure times) is needed.

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Section: Introductionmentioning

confidence: 76%

Selectivity and resistance to poisons of commercial hydrogen sensors

Palmisano

Weidner

Boon-Brett

et al. 2015

International Journal of Hydrogen Energy

Self Cite

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“…Hydrogen was tested as well but not due to its toxicity, but rather as it is a very common gas in the ambient and can be used as a marker for human presence [105]. Moreover, many known sensor principles show a cross-sensitivity to changes in hydrogen concentration [106]. Hydrogen can also become explosive if more than 4 vol% are present in air and should therefore not exceed this threshold.…”

Section: Gas Mixing Apparatusmentioning

confidence: 99%

Functionalized epitaxial graphene as versatile platform for air quality sensors

Rodner

2021

Linköping Studies in Science and Technology. Dissertations

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The work presented in this thesis focuses on epitaxial graphene on SiC as a platform for air quality sensors. Several approaches have been tested and evaluated to increase the sensitivity, selectivity, speed of response and stability of the sensors. The graphene surfaces have been functionalized, for example, with different metal oxide nanoparticles and nanolayers using hollow-cathode sputtering and pulsed laser deposition. The modified surfaces were investigated towards topography, integrity and chemical composition with characterization methods such as atomic force microscopy and Raman spectroscopy. Interaction energies between several analytes and nanoparticle-graphene-combinations were calculated by density functional theory to find the optimal material for specific target gases, and to verify the usefulness of this approach. The impact of environmental influences such as operating temperature, relative humidity and UV irradiation on sensing properties was investigated as well. To further enhance sensor performances, the first-order time-derivative of the sensor's resistance was introduced to speed up sensor response and a temperature cycled operation mode was investigated towards selectivity.Applying these methods in laboratory conditions, sensors with a quantitative readout of single ppb benzene and formaldehyde were developed. These results show promise to fill the existing gap of low-cost but highly sensitive and fast gas sensors for air quality monitoring.The present dissertation thesis is the result of my binational doctoral studies carried out between November 2016 and May 2021.

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“…Messbereich bis 4 [3]. Diese neuen Anforderungen beziehen sich vor allem auf einen erweiterten Messbereich, für die Überwachung von mobilen Brennstoffzellen z.B.…”

Section: Motivationunclassified

“…Ein Nachteil der o.g. marktverfügbaren H2-Sensoren, insbesondere für die erwähnten neuen Einsatzgebiete, besteht zudem darin, dass diese alle, außer WLD-Sensoren, mehr oder weniger starke Querempfindlichkeiten zu anderen brennbaren Gasen aufweisen [4]. Seit jüngerer Zeit sind H2-Sensoren auf dem Markt, die auf dem physikalischen Schalten von Pd oder Pd-Legierungen beruhen und von daher frei von Querempfindlichkeiten sind.…”

Section: Motivationunclassified