{"title":"对甲苯氧化的配位不饱和铝锚定Pt催化剂的见解","authors":"Tao Wang, Shuangde Li, Yunfa Chen","doi":"10.1007/s10562-025-05135-0","DOIUrl":null,"url":null,"abstract":"<div><p>The thermal stability of Pt particles is crucial for volatile organic compounds (VOCs) catalytic oxidation. Herein, a coordinated unsaturated aluminum (CUA) with abundant pentacoordinate Al<sup>3+</sup> sites (Al<sup>3 +</sup> <sub>penta</sub>) stabilizing platinum catalyst was synthesized by the solution combustion method followed the incipient wetness impregnation method for VOCs degradation. The Pt particles exhibited well dispersion after 800 °C calcination, comparied with Pt loaded on commercial γ-Al<sub>2</sub>O<sub>3</sub>, detectd by SEM and TEM. The heat-resistant sintering was related to the anchoring of Pt by Al<sup>3 +</sup> <sub>penta</sub> proved by <sup>27</sup>Al NMR. The turnover frequency (TOF) of Pt/CUA for toluene oxidation was as high as 2.58 h<sup>-1</sup> under 60,000 ml<sup>-1</sup> g<sup>-1</sup> h<sup>-1</sup> and 5% water steam, which is about 2 times higher than that of Pt/γ-Al<sub>2</sub>O<sub>3</sub>. Furthermore, after 800 °C calcination, the TOF of Pt/CUA-800 was increased to 4.57 h<sup>-1</sup> in comparison with 0.4 h<sup>-1</sup> for Pt/γ-Al<sub>2</sub>O<sub>3</sub>-800. The excellent catalytic performance was maybe due to the Pt dispersion, low temperature reducibility and high surface chemsorbed oxygen species characterized by pulsed CO chemisorption, H<sub>2</sub>-TPR and XPS. Anchorage effect of Al<sup>3 +</sup> <sub>penta</sub> on Pt metal was shown to be an effective strategy for the enhancement of VOCs composition.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 9","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Insights into Coordinatively Unsaturated Aluminum Anchoring Pt Catalyst for Toluene Oxidation\",\"authors\":\"Tao Wang, Shuangde Li, Yunfa Chen\",\"doi\":\"10.1007/s10562-025-05135-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The thermal stability of Pt particles is crucial for volatile organic compounds (VOCs) catalytic oxidation. Herein, a coordinated unsaturated aluminum (CUA) with abundant pentacoordinate Al<sup>3+</sup> sites (Al<sup>3 +</sup> <sub>penta</sub>) stabilizing platinum catalyst was synthesized by the solution combustion method followed the incipient wetness impregnation method for VOCs degradation. The Pt particles exhibited well dispersion after 800 °C calcination, comparied with Pt loaded on commercial γ-Al<sub>2</sub>O<sub>3</sub>, detectd by SEM and TEM. The heat-resistant sintering was related to the anchoring of Pt by Al<sup>3 +</sup> <sub>penta</sub> proved by <sup>27</sup>Al NMR. The turnover frequency (TOF) of Pt/CUA for toluene oxidation was as high as 2.58 h<sup>-1</sup> under 60,000 ml<sup>-1</sup> g<sup>-1</sup> h<sup>-1</sup> and 5% water steam, which is about 2 times higher than that of Pt/γ-Al<sub>2</sub>O<sub>3</sub>. Furthermore, after 800 °C calcination, the TOF of Pt/CUA-800 was increased to 4.57 h<sup>-1</sup> in comparison with 0.4 h<sup>-1</sup> for Pt/γ-Al<sub>2</sub>O<sub>3</sub>-800. The excellent catalytic performance was maybe due to the Pt dispersion, low temperature reducibility and high surface chemsorbed oxygen species characterized by pulsed CO chemisorption, H<sub>2</sub>-TPR and XPS. Anchorage effect of Al<sup>3 +</sup> <sub>penta</sub> on Pt metal was shown to be an effective strategy for the enhancement of VOCs composition.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"155 9\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2025-08-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Catalysis Letters\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10562-025-05135-0\",\"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/s10562-025-05135-0","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Insights into Coordinatively Unsaturated Aluminum Anchoring Pt Catalyst for Toluene Oxidation
The thermal stability of Pt particles is crucial for volatile organic compounds (VOCs) catalytic oxidation. Herein, a coordinated unsaturated aluminum (CUA) with abundant pentacoordinate Al3+ sites (Al3 +penta) stabilizing platinum catalyst was synthesized by the solution combustion method followed the incipient wetness impregnation method for VOCs degradation. The Pt particles exhibited well dispersion after 800 °C calcination, comparied with Pt loaded on commercial γ-Al2O3, detectd by SEM and TEM. The heat-resistant sintering was related to the anchoring of Pt by Al3 +penta proved by 27Al NMR. The turnover frequency (TOF) of Pt/CUA for toluene oxidation was as high as 2.58 h-1 under 60,000 ml-1 g-1 h-1 and 5% water steam, which is about 2 times higher than that of Pt/γ-Al2O3. Furthermore, after 800 °C calcination, the TOF of Pt/CUA-800 was increased to 4.57 h-1 in comparison with 0.4 h-1 for Pt/γ-Al2O3-800. The excellent catalytic performance was maybe due to the Pt dispersion, low temperature reducibility and high surface chemsorbed oxygen species characterized by pulsed CO chemisorption, H2-TPR and XPS. Anchorage effect of Al3 +penta on Pt metal was shown to be an effective strategy for the enhancement of VOCs composition.
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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