{"title":"采用较大表面积碳载体制备的PtRu/C PEFC阳极催化剂表面Pt-Ru键合与CO耐受性的关系","authors":"Tatsuya Takeguchi, Pongtorn Dhupatemiya, Napan Narischat, Garavdorj Batnyagt, Thidarat Wongsawa, Shin R. Mukai","doi":"10.1007/s10562-025-05177-4","DOIUrl":null,"url":null,"abstract":"<div><p>We prepared PtRu/C anode catalysts for PEFCs with Ru: Pt molar ratios of 1.0, 1.3, and 2.0, supported on two types of Ketjen Black carbon (KB800 and KB1600) with surface areas of 789 and 1627 m<sup>2</sup>g<sup>– 1</sup>, respectively. The PtRu particles supported on KB1600 were smaller than those supported on KB800 because of their larger surface areas. Characterization using N<sub>2</sub> adsorption, TEM, CO tolerance, CO stripping, and in situ X-ray absorption fine structure (XAFS) revealed well-alloyed Pt-Ru structures, providing CO adsorption sites of approximately 80–100 m<sup>2</sup>g<sub>PtRu</sub><sup>– 1</sup>. Among the catalysts, PtRu<sub>1.3</sub>/KB1600 exhibited the highest CO tolerance, maintaining about 0.73 V at 1000 ppm CO, outperforming a commercial catalyst (0.47 V). The differences in CO tolerance were linked to the number of active CO oxidation sites, as determined by CO stripping. Because only surface Pt-Ru bonding contributes to CO oxidation, whereas surface Ru-Ru bonding does not, the ECSA for Pt-Ru bonding of each catalyst was calculated from the results of CO stripping and in situ XAFS. This parameter can be used as a key factor in evaluating or predicting the CO tolerance of PtRu catalysts and can be optimized through proper selection of the carbon support.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Finely dispersed PtRu₁.₃ nanoparticles on high-surface-area carbon showing enhanced CO tolerance</p></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 10","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10562-025-05177-4.pdf","citationCount":"0","resultStr":"{\"title\":\"Correlation between Surface Pt-Ru Bonding and CO Tolerance of PtRu/C PEFC Anode Catalysts Prepared Using a Relatively Large Surface Area Carbon Support\",\"authors\":\"Tatsuya Takeguchi, Pongtorn Dhupatemiya, Napan Narischat, Garavdorj Batnyagt, Thidarat Wongsawa, Shin R. Mukai\",\"doi\":\"10.1007/s10562-025-05177-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>We prepared PtRu/C anode catalysts for PEFCs with Ru: Pt molar ratios of 1.0, 1.3, and 2.0, supported on two types of Ketjen Black carbon (KB800 and KB1600) with surface areas of 789 and 1627 m<sup>2</sup>g<sup>– 1</sup>, respectively. The PtRu particles supported on KB1600 were smaller than those supported on KB800 because of their larger surface areas. Characterization using N<sub>2</sub> adsorption, TEM, CO tolerance, CO stripping, and in situ X-ray absorption fine structure (XAFS) revealed well-alloyed Pt-Ru structures, providing CO adsorption sites of approximately 80–100 m<sup>2</sup>g<sub>PtRu</sub><sup>– 1</sup>. Among the catalysts, PtRu<sub>1.3</sub>/KB1600 exhibited the highest CO tolerance, maintaining about 0.73 V at 1000 ppm CO, outperforming a commercial catalyst (0.47 V). The differences in CO tolerance were linked to the number of active CO oxidation sites, as determined by CO stripping. Because only surface Pt-Ru bonding contributes to CO oxidation, whereas surface Ru-Ru bonding does not, the ECSA for Pt-Ru bonding of each catalyst was calculated from the results of CO stripping and in situ XAFS. This parameter can be used as a key factor in evaluating or predicting the CO tolerance of PtRu catalysts and can be optimized through proper selection of the carbon support.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Finely dispersed PtRu₁.₃ nanoparticles on high-surface-area carbon showing enhanced CO tolerance</p></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"155 10\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2025-09-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s10562-025-05177-4.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10562-025-05177-4\",\"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":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-025-05177-4","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Correlation between Surface Pt-Ru Bonding and CO Tolerance of PtRu/C PEFC Anode Catalysts Prepared Using a Relatively Large Surface Area Carbon Support
We prepared PtRu/C anode catalysts for PEFCs with Ru: Pt molar ratios of 1.0, 1.3, and 2.0, supported on two types of Ketjen Black carbon (KB800 and KB1600) with surface areas of 789 and 1627 m2g– 1, respectively. The PtRu particles supported on KB1600 were smaller than those supported on KB800 because of their larger surface areas. Characterization using N2 adsorption, TEM, CO tolerance, CO stripping, and in situ X-ray absorption fine structure (XAFS) revealed well-alloyed Pt-Ru structures, providing CO adsorption sites of approximately 80–100 m2gPtRu– 1. Among the catalysts, PtRu1.3/KB1600 exhibited the highest CO tolerance, maintaining about 0.73 V at 1000 ppm CO, outperforming a commercial catalyst (0.47 V). The differences in CO tolerance were linked to the number of active CO oxidation sites, as determined by CO stripping. Because only surface Pt-Ru bonding contributes to CO oxidation, whereas surface Ru-Ru bonding does not, the ECSA for Pt-Ru bonding of each catalyst was calculated from the results of CO stripping and in situ XAFS. This parameter can be used as a key factor in evaluating or predicting the CO tolerance of PtRu catalysts and can be optimized through proper selection of the carbon support.
Graphical Abstract
Finely dispersed PtRu₁.₃ nanoparticles on high-surface-area carbon showing enhanced CO tolerance
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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