{"title":"不同基质上负载的钌镧氧化物阴极催化剂在碱水电解中反复启动和关闭操作中的耐久性","authors":"Eiji Higuchi, Teruaki Miyake, Tomohiro Higashida, Masanobu Chiku, Akihiro Kato, Zaenal Awaludin, Yoshinori Nishiki, Hiroshi Inoue","doi":"10.1007/s12678-026-01053-w","DOIUrl":null,"url":null,"abstract":"<div><p>In bipolar alkaline water electrolysis, electrocatalyst degradation due to a reverse current during shutdown is a serious problem. In this study, the effect of the substrate material on the degradation of commercial Ru–lanthanide oxide cathode catalysts due to a reverse current during repeated startup/shutdown (SU/SD) operations was investigated. The causes of catalyst degradation were discussed based on spectroscopic and mass data of the electrolyte and cathode before and after SU/SD operation. In the case of the Ni substrate, the current density for the hydrogen evolution reaction (HER) decreased rapidly during the initial 200 cycles of SU/SD operations. In contrast, for the Ti substrate, the HER current density decreased by ~ 20% in the initial 200 cycles and then stabilized. The dropout ratios of the Ru component on the Ni and Ti substrates were approximately 99% and 27%, respectively. These results demonstrated that catalyst degradation during repeated SU/SD operations was caused by catalyst dropout from both substrates, and the Ti substrate was effective in suppressing the degradation.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":535,"journal":{"name":"Electrocatalysis","volume":"17 5","pages":"870 - 881"},"PeriodicalIF":3.2000,"publicationDate":"2026-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Durability of Ru–Lanthanide Oxide Cathode Catalysts Supported on Different Substrates during Repeated Startup and Shutdown Operations in Alkaline Water Electrolysis\",\"authors\":\"Eiji Higuchi, Teruaki Miyake, Tomohiro Higashida, Masanobu Chiku, Akihiro Kato, Zaenal Awaludin, Yoshinori Nishiki, Hiroshi Inoue\",\"doi\":\"10.1007/s12678-026-01053-w\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In bipolar alkaline water electrolysis, electrocatalyst degradation due to a reverse current during shutdown is a serious problem. In this study, the effect of the substrate material on the degradation of commercial Ru–lanthanide oxide cathode catalysts due to a reverse current during repeated startup/shutdown (SU/SD) operations was investigated. The causes of catalyst degradation were discussed based on spectroscopic and mass data of the electrolyte and cathode before and after SU/SD operation. In the case of the Ni substrate, the current density for the hydrogen evolution reaction (HER) decreased rapidly during the initial 200 cycles of SU/SD operations. In contrast, for the Ti substrate, the HER current density decreased by ~ 20% in the initial 200 cycles and then stabilized. The dropout ratios of the Ru component on the Ni and Ti substrates were approximately 99% and 27%, respectively. These results demonstrated that catalyst degradation during repeated SU/SD operations was caused by catalyst dropout from both substrates, and the Ti substrate was effective in suppressing the degradation.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":535,\"journal\":{\"name\":\"Electrocatalysis\",\"volume\":\"17 5\",\"pages\":\"870 - 881\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2026-06-28\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Electrocatalysis\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s12678-026-01053-w\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrocatalysis","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s12678-026-01053-w","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Durability of Ru–Lanthanide Oxide Cathode Catalysts Supported on Different Substrates during Repeated Startup and Shutdown Operations in Alkaline Water Electrolysis
In bipolar alkaline water electrolysis, electrocatalyst degradation due to a reverse current during shutdown is a serious problem. In this study, the effect of the substrate material on the degradation of commercial Ru–lanthanide oxide cathode catalysts due to a reverse current during repeated startup/shutdown (SU/SD) operations was investigated. The causes of catalyst degradation were discussed based on spectroscopic and mass data of the electrolyte and cathode before and after SU/SD operation. In the case of the Ni substrate, the current density for the hydrogen evolution reaction (HER) decreased rapidly during the initial 200 cycles of SU/SD operations. In contrast, for the Ti substrate, the HER current density decreased by ~ 20% in the initial 200 cycles and then stabilized. The dropout ratios of the Ru component on the Ni and Ti substrates were approximately 99% and 27%, respectively. These results demonstrated that catalyst degradation during repeated SU/SD operations was caused by catalyst dropout from both substrates, and the Ti substrate was effective in suppressing the degradation.
期刊介绍：
Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies.
Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.
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