{"title":"在铜改性金/羟基磷灰石催化剂上将甲醇中的 1，2-丙二醇无碱转化为乳酸甲酯","authors":"Junying Tian, Yingying Fan, Tao Wei, Qingxia Guo, Weiguo Fang, Yongle Guo","doi":"10.1007/s10562-024-04838-0","DOIUrl":null,"url":null,"abstract":"<div><p>The catalytic oxidative esterification of 1, 2-propanediol to methyl lactate in a base-free methanol system over Cu-modified Au/HAP catalysts was investigated. The catalysts demonstrated efficient activity in converting 1, 2-propanediol to methyl lactate without any base additives, achieving a conversion of 91.2% and a selectivity of 45% for methyl lactate under optimized conditions of 160 °C, 2 h, and 1.0 MPa O<sub>2</sub> over 2Au12Cu/HAP catalyst. The Au sites were identified as pivotal in catalyzing the oxidation of 1, 2-propanediol, and the basic sites of HAP was hypothesized to play a similar role with base additives to enhance the catalytic activity of Au. Furthermore, modification of Cu to Au was observed to promote the oxidation of the hydroxyacetone intermediate to methyl lactate while effectively suppressing the over-oxidation of methyl lactate, thus increased selectivity of methyl lactate.</p><h3>Graphical Abstract</h3><p>1,2-propanediol was convertedto methyl lactateefficientlyin a base-free methanol system over Au-Cu/HAP catalysts</p>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 1","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Base-Free Conversion of 1, 2-Propanediol to Methyl Lactate in Methanol Over Cu-Modified Au/ Hydroxylapatite Catalysts\",\"authors\":\"Junying Tian, Yingying Fan, Tao Wei, Qingxia Guo, Weiguo Fang, Yongle Guo\",\"doi\":\"10.1007/s10562-024-04838-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The catalytic oxidative esterification of 1, 2-propanediol to methyl lactate in a base-free methanol system over Cu-modified Au/HAP catalysts was investigated. The catalysts demonstrated efficient activity in converting 1, 2-propanediol to methyl lactate without any base additives, achieving a conversion of 91.2% and a selectivity of 45% for methyl lactate under optimized conditions of 160 °C, 2 h, and 1.0 MPa O<sub>2</sub> over 2Au12Cu/HAP catalyst. The Au sites were identified as pivotal in catalyzing the oxidation of 1, 2-propanediol, and the basic sites of HAP was hypothesized to play a similar role with base additives to enhance the catalytic activity of Au. Furthermore, modification of Cu to Au was observed to promote the oxidation of the hydroxyacetone intermediate to methyl lactate while effectively suppressing the over-oxidation of methyl lactate, thus increased selectivity of methyl lactate.</p><h3>Graphical Abstract</h3><p>1,2-propanediol was convertedto methyl lactateefficientlyin a base-free methanol system over Au-Cu/HAP catalysts</p>\\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":508,\"journal\":{\"name\":\"Catalysis Letters\",\"volume\":\"155 1\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2024-11-16\",\"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/s10562-024-04838-0\",\"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/s10562-024-04838-0","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Base-Free Conversion of 1, 2-Propanediol to Methyl Lactate in Methanol Over Cu-Modified Au/ Hydroxylapatite Catalysts
The catalytic oxidative esterification of 1, 2-propanediol to methyl lactate in a base-free methanol system over Cu-modified Au/HAP catalysts was investigated. The catalysts demonstrated efficient activity in converting 1, 2-propanediol to methyl lactate without any base additives, achieving a conversion of 91.2% and a selectivity of 45% for methyl lactate under optimized conditions of 160 °C, 2 h, and 1.0 MPa O2 over 2Au12Cu/HAP catalyst. The Au sites were identified as pivotal in catalyzing the oxidation of 1, 2-propanediol, and the basic sites of HAP was hypothesized to play a similar role with base additives to enhance the catalytic activity of Au. Furthermore, modification of Cu to Au was observed to promote the oxidation of the hydroxyacetone intermediate to methyl lactate while effectively suppressing the over-oxidation of methyl lactate, thus increased selectivity of methyl lactate.
Graphical Abstract
1,2-propanediol was convertedto methyl lactateefficientlyin a base-free methanol system over Au-Cu/HAP catalysts
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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