{"title":"重整型PEM燃料电池中钌中毒ORR催化剂的再生策略","authors":"Qiang Guo, Frédéric Hasché, Mehtap Oezaslan","doi":"10.1149/11204.0389ecst","DOIUrl":null,"url":null,"abstract":"PEM fuel cells operating on reformate gases suffer from Ru crossover and its re-deposition in the cathode catalyst layer. Therefore, strategies for regeneration of Ru-poisoned ORR catalysts are needed. Here, we developed a regeneration protocol and tested this for commercial PtRu 2 /Vulcan, which represents a worst case scenario of Ru-poisoned ORR catalysts due to the high Ru content and good intermixture with Pt. Our protocol consists of two chronoamperometric cycles, namely at 1.4 V RHE for 5 minutes followed by 1.6 V RHE for 100 s. The Ru deletion as a function of the number of regeneration cycles was in-situ monitored by electrochemical CO stripping method. The mass and specific ORR activities of the recovered PtRu 2 /Vulcan increase by 6-times and 4.4-times, respectively. Very remarkably, our regeneration protocol aims to trigger the Ru dissolution by forming the RuO 4 during the OER without a negative impact on the catalytic ORR properties of Pt.","PeriodicalId":11473,"journal":{"name":"ECS Transactions","volume":"54 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Regeneration Strategies for Ruthenium-Poisoned ORR Catalysts in Reformate PEM Fuel Cells\",\"authors\":\"Qiang Guo, Frédéric Hasché, Mehtap Oezaslan\",\"doi\":\"10.1149/11204.0389ecst\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"PEM fuel cells operating on reformate gases suffer from Ru crossover and its re-deposition in the cathode catalyst layer. Therefore, strategies for regeneration of Ru-poisoned ORR catalysts are needed. Here, we developed a regeneration protocol and tested this for commercial PtRu 2 /Vulcan, which represents a worst case scenario of Ru-poisoned ORR catalysts due to the high Ru content and good intermixture with Pt. Our protocol consists of two chronoamperometric cycles, namely at 1.4 V RHE for 5 minutes followed by 1.6 V RHE for 100 s. The Ru deletion as a function of the number of regeneration cycles was in-situ monitored by electrochemical CO stripping method. The mass and specific ORR activities of the recovered PtRu 2 /Vulcan increase by 6-times and 4.4-times, respectively. Very remarkably, our regeneration protocol aims to trigger the Ru dissolution by forming the RuO 4 during the OER without a negative impact on the catalytic ORR properties of Pt.\",\"PeriodicalId\":11473,\"journal\":{\"name\":\"ECS Transactions\",\"volume\":\"54 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-09-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ECS Transactions\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1149/11204.0389ecst\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ECS Transactions","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1149/11204.0389ecst","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
在重整气体上工作的PEM燃料电池遭受Ru交叉及其在阴极催化剂层中的再沉积。因此，需要研究ru中毒ORR催化剂的再生策略。在这里，我们开发了一种再生方案，并在商用PtRu 2 /Vulcan上进行了测试，该方案代表了钌中毒ORR催化剂的最坏情况，因为Ru含量高，与Pt的混合良好。我们的方案包括两个计时电流循环，即在1.4 V RHE下5分钟，然后在1.6 V RHE下100秒。采用电化学CO汽提法，现场监测了Ru缺失与再生循环次数的关系。回收后的PtRu 2 /Vulcan的质量和比ORR活性分别提高了6倍和4.4倍。值得注意的是，我们的再生方案旨在通过在OER过程中形成ruo4来触发Ru的溶解，而不会对Pt的催化ORR性能产生负面影响。
Regeneration Strategies for Ruthenium-Poisoned ORR Catalysts in Reformate PEM Fuel Cells
PEM fuel cells operating on reformate gases suffer from Ru crossover and its re-deposition in the cathode catalyst layer. Therefore, strategies for regeneration of Ru-poisoned ORR catalysts are needed. Here, we developed a regeneration protocol and tested this for commercial PtRu 2 /Vulcan, which represents a worst case scenario of Ru-poisoned ORR catalysts due to the high Ru content and good intermixture with Pt. Our protocol consists of two chronoamperometric cycles, namely at 1.4 V RHE for 5 minutes followed by 1.6 V RHE for 100 s. The Ru deletion as a function of the number of regeneration cycles was in-situ monitored by electrochemical CO stripping method. The mass and specific ORR activities of the recovered PtRu 2 /Vulcan increase by 6-times and 4.4-times, respectively. Very remarkably, our regeneration protocol aims to trigger the Ru dissolution by forming the RuO 4 during the OER without a negative impact on the catalytic ORR properties of Pt.
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