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CuO can be used for H<jats:sub>2<\/jats:sub>S dosimetry, based on the formation of conductive CuS and the concomitant significant increase in conductance. In theory, at elevated temperature the reaction is reversed and CuO is formed, ideally enabling repeated and long\u2010term use of one sensor. Yet, the performance of CuO tends to drop upon cycling. Utilizing defined CuO nanorods we thoroughly elucidated the associated detrimental chemical changes directly on the sensors, by Raman and electron microscopy analysis of each step during sensing (CuO\u2192CuS) and regeneration (CuS\u2192CuO) cycles. We find the decrease in the sensing performance is mainly caused by the irreversible formation of CuSO<jats:sub>4<\/jats:sub> during regeneration. The findings allowed us to develop strategies to reduce CuSO<jats:sub>4<\/jats:sub> formation and thus to substantially maintain the sensing stability even for repeated cycles. We achieved CuO\u2010based dosimeters possessing a response time of a few minutes only, even for 10\u2005ppm H<jats:sub>2<\/jats:sub>S, and prolonged life\u2010time.<\/jats:p>","DOI":"10.1002\/chem.202103437","type":"journal-article","created":{"date-parts":[[2021,11,3]],"date-time":"2021-11-03T14:24:29Z","timestamp":1635949469000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["H<sub>2<\/sub>S Dosimetry by CuO: Towards Stable Sensors by Unravelling the Underlying Solid\u2010State Chemistry"],"prefix":"10.1002","volume":"28","author":[{"given":"Sebastian","family":"Werner","sequence":"first","affiliation":[{"name":"Institute of Physical Chemistry Justus-Liebig University Giessen  Heinrich-Buff-Ring 17 35392 Giessen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Clarissa","family":"Glaser","sequence":"additional","affiliation":[{"name":"Institute of Physical Chemistry Justus-Liebig University Giessen  Heinrich-Buff-Ring 17 35392 Giessen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thomas","family":"Kasper","sequence":"additional","affiliation":[{"name":"Institute of Physical Chemistry Justus-Liebig University Giessen  Heinrich-Buff-Ring 17 35392 Giessen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Trung Nghia Nguy\u00ean","family":"L\u00ea","sequence":"additional","affiliation":[{"name":"Institute of Physical Chemistry Justus-Liebig University Giessen  Heinrich-Buff-Ring 17 35392 Giessen Germany"},{"name":"Dipartimento di Scienze Chimiche Universit\u00e0 degli Studi di Padova  Via Marzolo 1 35131 Padova"},{"name":"INSTM, UdR di Padova  Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1860-8711","authenticated-orcid":false,"given":"Silvia","family":"Gross","sequence":"additional","affiliation":[{"name":"Dipartimento di Scienze Chimiche Universit\u00e0 degli Studi di Padova  Via Marzolo 1 35131 Padova"},{"name":"INSTM, UdR di Padova  Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8452-2663","authenticated-orcid":false,"given":"Bernd M.","family":"Smarsly","sequence":"additional","affiliation":[{"name":"Institute of Physical Chemistry Justus-Liebig University Giessen  Heinrich-Buff-Ring 17 35392 Giessen Germany"},{"name":"Center for Materials Research Justus-Liebig University Giessen  Heinrich-Buff-Ring 17 35392 Giessen Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,12,4]]},"reference":[{"key":"e_1_2_7_1_1","unstructured":"\u00a0"},{"key":"e_1_2_7_2_2","doi-asserted-by":"publisher","DOI":"10.1515\/revce-2017-0004"},{"key":"e_1_2_7_3_2","doi-asserted-by":"publisher","DOI":"10.3390\/catal10050521"},{"key":"e_1_2_7_4_1","unstructured":"\u00a0"},{"key":"e_1_2_7_5_2","doi-asserted-by":"publisher","DOI":"10.1146\/annurev.pa.32.040192.000545"},{"key":"e_1_2_7_6_2","doi-asserted-by":"publisher","DOI":"10.3390\/antiox9070621"},{"key":"e_1_2_7_7_1","unstructured":"\u00a0"},{"key":"e_1_2_7_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.apenergy.2008.07.007"},{"key":"e_1_2_7_9_2","doi-asserted-by":"publisher","DOI":"10.5194\/jsss-4-143-2015"},{"key":"e_1_2_7_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.snb.2011.02.024"},{"key":"e_1_2_7_11_1","doi-asserted-by":"publisher","DOI":"10.3390\/ijerph18062866"},{"key":"e_1_2_7_12_1","doi-asserted-by":"publisher","DOI":"10.1002\/adfm.201904505"},{"key":"e_1_2_7_13_1","unstructured":"\u00a0"},{"key":"e_1_2_7_14_2","unstructured":"Technical White Paper: Detecting Hydrogen Sulfide Gas and Understanding Its Danger in the Field.Rosemount Anal. 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