Journal Article10.1016/j.jelechem.2022.116740
Improved Iridium/Iridium Oxide pH Electrode through Supercritical Treatment
Mengting Dai,Jinfeng Xia,Zhenhai Xue,Guohong Zhouc,Danyu Jiang,Yuerong Heng,Cui Yan Yu,Jiayan Miao,Qiang Li +8 more
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TL;DR: The relationship between the electrode structure and performance was investigated and discussed in this article , where the as-prepared iridium/iridium oxide electrodes were treated at 35 MPa and 400 °C for 3 h.
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Abstract: pH measurement has received extensive attention from researchers in numerous fields including medical diagnostics agriculture, food industry, marine, and chemical engineering. Owing to their electrode stability, drift degree, and preparation process, iridium/iridium oxide electrodes are considered as the most promising candidate for pH detection under these conditions. In this study, iridium/iridium oxide electrodes were fabricated by thermal cycling oxidation method. The relationship between the electrode structure and performance was investigated and discussed. To study the influence of supercritical treatment, the as-prepared electrodes were treated at 35 MPa and 400 °C for 3 h. After examining their pH response, the supercritically treated electrodes exhibit better performance than the untreated iridium/iridium oxide electrodes. The structural changes of the treated electrodes were investigated by Raman spectroscopy, X-ray photoelectron spectroscopy, cyclic voltammograms and scanning electron microscopy. The results revealed the important changes in the iridium oxide film of the electrode after supercritical treatment, such as its morphology, chemical bond, valence state, and defects, which collaborated to achieve its improved performance.
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Citations
IrOx–Pt electrode for the electro-oxidation of ethanol in alkaline-type direct ethanol fuel cells: an excellent CO-tolerant catalyst
Md. Fahamidul Islam,Jahir Ahmed,M Faisal,JariS. Algethami,Kentaro Aoki,Yuki Nagao,Farid A. Harraz,Mohammad A. Hasnat +7 more
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TL;DR: Researchers synthesized AgTi2(PO4)3 as a solid electrolyte and developed an all-solid-state reference electrode, demonstrating its potential in pH sensing and metal ion detection with good linearity and low detection limits in aqueous and marine environments.
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Preparation of an iridium oxide micro pH electrode and its response rate under dynamic stray current interference
Defu Liang,Qi Yan,Yu Gu,Ying Wang,Lin Liu +4 more
TL;DR: The optimal preparation parameters and response mechanism of iridium oxide micro pH electrodes are investigated. The response rate and error are analyzed, and the reliability under dynamic stray current interference is verified.
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3D Printing as an Adaptive Tool for Sensor Fabrication Applied through pH Monitoring
Franc Paré,Mingyue Pan,Oscar Guerrero‐Sodric,Juan Antonio Baeza,Albert Guisasola,Mireia Baeza,Franc Paré,Mingyue Pan,Oscar Guerrero‐Sodric,Juan Antonio Baeza,Albert Guisasola,Mireia Baeza +11 more
Abstract: As a key parameter, pH has received a lot of attention from the sensing perspective. New materials and technologies are being used to produce state of the art devices capable of tracking it. However, most generic sensors lack the applicability that certain applications require. In this article, 3D printing technology is used to its full potential to produce electrodes, which are modified into pH sensors and reference electrodes, with shapre‐driven additional functionality for monitoring ammonia recovery in a bioreactor. The 3D‐printed electrodes are modified with a layer of iridium oxide to be turned into pH sensitive devices. Their characterization showed their characteristic super‐Nernstian response (−77 ± 0.2 mV pH −1 ), high reproducibility (RSD < 5%) between sensors and repeatability (RSD < 2%) between measurements. Moreover, the sensors are stable for at least 20 days and tunable in length. All of this results in the sensors being built into a functional shape and tested to monitor the performance of an ammonia‐producing bioelectrochemical reactor.
Influence of surface roughness on the response time of iridium oxide pH sensors
Miyuki Tabata,Hiroshi Yoshida,Ririko Kobayashi,Yoshiaki Sugimura,Nanae Yamashita,Yoshinori Negishi,Mai Yamada,Toshiro Saito,Yuji Miyahara +8 more
References
Electronic semiconducting oxides as pH sensors
Agner Fog,Richard P. Buck +1 more
TL;DR: In this article, the response of electronicallyconducting oxides as pH sensors is demonstrated and several reaction mechanisms are proposed and discussed, but no interference from monovalent cations (Group IA) was observed.
406
Metal oxides based electrochemical pH sensors: Current progress and future perspectives
TL;DR: In this paper, the authors proposed a pH sensor for food processing, health monitoring, agriculture and nuclear sectors, and water quality monitoring, which is on high demand in numerous applications.
366
A flexible pH sensor based on the iridium oxide sensing film
TL;DR: In this paper, a flexible pH sensor based on a polymeric substrate by low-cost sol-gel fabrication process of iridium oxide (IrOx) sensing film was developed.
346
A voltammetric investigation of the charge storage reactions of hydrous iridium oxide layers
Laurence D. Burke,D.P. Whelan +1 more
TL;DR: In this article, the unusual potential/pH behavior of hydrous oxide layers grown on iridium under potential cycling conditions is interpreted on the basis of a model which describes the interaction between the acid-base and redox properties of this type of system.
185
pH sensor properties of electrochemically grown iridium oxide
TL;DR: In this article, the open circuit potential of an electrochemically grown iridium oxide film is measured and shows a pH sensitivity between −60 and −80 mV/pH.