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Highly Efficient Asymmetric Synthesis of Aliphatic Chiral Secondary Alcohols by Whole Cells of E. coli Co-Expressing Alcohol Dehydrogenase and Glucose Dehydrogenase 大肠杆菌全细胞共同表达酒精脱氢酶和葡萄糖脱氢酶,高效不对称合成脂肪族手性仲醇
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2025-02-28 DOI: 10.1007/s10562-025-04970-5
Songshuang Cao, Xiaomei Wu, Baodi Ma, Yi Xu
{"title":"Highly Efficient Asymmetric Synthesis of Aliphatic Chiral Secondary Alcohols by Whole Cells of E. coli Co-Expressing Alcohol Dehydrogenase and Glucose Dehydrogenase","authors":"Songshuang Cao,&nbsp;Xiaomei Wu,&nbsp;Baodi Ma,&nbsp;Yi Xu","doi":"10.1007/s10562-025-04970-5","DOIUrl":"10.1007/s10562-025-04970-5","url":null,"abstract":"<div><p>Aliphatic chiral secondary alcohols are important chiral intermediates widely used in the synthesis of drugs and fine chemicals. The whole cells of recombinant <i>E. coli</i> co-expressing alcohol dehydrogenase and glucose dehydrogenase were used to catalyze the asymmetric reduction of three fatty ketones without the addition of exogenous cofactors. The reaction medium and reaction conditions were systematically studied. As expected, the kinds of co-solvents, the molar ratio of glucose/substrate, temperature, pH and cell amount have important influence on the reaction. Under the optimal condition (glucose at 1.5 times substrate concentration, isopropanol at 2%, PBS (0.1 M, pH 8.0), and 45℃), the cells co-expressing both enzymes efficiently catalyzed the asymmetric reduction of three fatty ketones to the corresponding (<i>S</i>)-fatty alcohols. The conversion and ee value of the products were both greater than 99% after 8 h reaction at 1 M of substrate concentration, and the space-time yield was between 346 ~ 470 g/(L·d). All the products can be obtained on gram scale. The results indicated that this method has potential application value in the efficient and green synthesis of aliphatic chiral secondary alcohols.</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 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Oxygen Vacancies Enhanced WO3/H-BiVO4 Photoanode with Conformal BiVO4-Layer for Promoting Photoelectrochemical Activity
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2025-02-26 DOI: 10.1007/s10562-025-04967-0
Xianfeng Zhao, Kangpeng Li, Xinxin Shao, Danyang Chen, Xinpeng Ji, Minghong Sun, Huidan Lu, Yongping Liu
{"title":"Oxygen Vacancies Enhanced WO3/H-BiVO4 Photoanode with Conformal BiVO4-Layer for Promoting Photoelectrochemical Activity","authors":"Xianfeng Zhao,&nbsp;Kangpeng Li,&nbsp;Xinxin Shao,&nbsp;Danyang Chen,&nbsp;Xinpeng Ji,&nbsp;Minghong Sun,&nbsp;Huidan Lu,&nbsp;Yongping Liu","doi":"10.1007/s10562-025-04967-0","DOIUrl":"10.1007/s10562-025-04967-0","url":null,"abstract":"<div><p>In this study, a three-dimensional WO<sub>3</sub>/BiVO<sub>4</sub> heterojunction was synthesized via layer-by-layer spin-coating and blow-drying, followed by heat treatment in a hydrogen-argon atmosphere to produce the WO<sub>3</sub>/H-BiVO<sub>4</sub> photoanode. The introduction of oxygen vacancies improved electron-hole separation efficiency, thereby enabling efficient water-splitting. X-ray photoelectron spectroscopy (XPS) analysis revealed that WO<sub>3</sub>/H-BiVO<sub>4</sub> exhibited a lower reflectance infrared (RIR) value, signifying a higher concentration of surface oxygen vacancies compared to WO<sub>3</sub>/BiVO<sub>4</sub>. Photoelectrochemical measurements at 1.23 V vs. RHE demonstrated that WO<sub>3</sub>/BiVO<sub>4</sub> achieved photocurrent densities and carrier densities 5-fold and 1.3-fold greater, respectively, than WO<sub>3</sub>. Notably, WO<sub>3</sub>/H-BiVO<sub>4</sub> exhibited further enhancements, with photocurrent densities and carrier densities 1.4-fold and 2.4-fold higher, respectively, than WO<sub>3</sub>/BiVO<sub>4</sub>. These findings underscore the critical role of heterojunction construction in boosting photocatalytic activity, while oxygen vacancy introduction further elevates photoelectric performance. Specifically, WO<sub>3</sub>/H-BiVO<sub>4</sub> achieved a peak photocurrent density of 6.5 mA·cm<sup>− 2</sup> at 1.6 V vs. RHE, attributed to its superior photogenerated charge separation and surface charge transfer efficiency. This study highlights that rationally expanding interfacial contact and optimizing oxygen vacancy concentrations are effective strategies for enhancing photocatalytic performance. These insights provide a valuable framework for the design and development of highly efficient photocatalysts for water-splitting applications.</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 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Highly Effective Hydrodeoxygenation of Sulfoxides and Pyridinic-N-Oxides Using Biomass-Derived Ethanol as the Hydrogen Donor
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2025-02-26 DOI: 10.1007/s10562-025-04971-4
Zhe Zheng, Nian Xiang, Yinkun Li, Siwei Xu, Guoqiang She, Peng Zhou, Bing Liu
{"title":"Highly Effective Hydrodeoxygenation of Sulfoxides and Pyridinic-N-Oxides Using Biomass-Derived Ethanol as the Hydrogen Donor","authors":"Zhe Zheng,&nbsp;Nian Xiang,&nbsp;Yinkun Li,&nbsp;Siwei Xu,&nbsp;Guoqiang She,&nbsp;Peng Zhou,&nbsp;Bing Liu","doi":"10.1007/s10562-025-04971-4","DOIUrl":"10.1007/s10562-025-04971-4","url":null,"abstract":"<div><p>Ethanol is regarded as a promising and green hydrogen donor due to its easy and large-scale production from abundant biomass resources. In this work, a nitrogen-doped carbon-encapsulated Co catalyst (Co@NC-800) was synthesized by a simple pyrolysis process and demonstrated promising activity in the hydrodeoxygenation of sulfoxides and pyridine N-oxides, producing sulfide and pyridine with good yields ranging from 80.3 to 99.0%. Moreover, the activity of the Co@NC-800 catalyst remained stable after 5 runs, indicating good stability.</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 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Boosting the Electrochemical Hydrogen Evolution Activity by In Situ Decoration of Ag Nanoparticles over Few Layered MoS2 Nanosheets
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2025-02-26 DOI: 10.1007/s10562-025-04957-2
Akshaya Pisal Deshmukh, Reshma Bhosale, Tejashree Bhave
{"title":"Boosting the Electrochemical Hydrogen Evolution Activity by In Situ Decoration of Ag Nanoparticles over Few Layered MoS2 Nanosheets","authors":"Akshaya Pisal Deshmukh,&nbsp;Reshma Bhosale,&nbsp;Tejashree Bhave","doi":"10.1007/s10562-025-04957-2","DOIUrl":"10.1007/s10562-025-04957-2","url":null,"abstract":"<div><p>In this work we have synthesized few layered MoS<sub>2</sub> nanosheets and to boost the electrochemical hydrogen evolution reaction (HER) over as an electrocatalyst, in situ Ag nanoparticles are loaded uniformly on the sheets by using simple and one pot method of hydrothermal synthesis. The overpotential drop recorded in Ag/MoS<sub>2</sub> is almost double as compared to pristine MoS<sub>2</sub> which indicates that decoration of Ag has lowered the barrier energy of the HER reaction and increased the efficiency of catalyst. In turn, layered structure of MoS<sub>2</sub> provided the matrix for uniform loading of Ag nanoparticles. More importantly, lower Tafel value (74 mV/dec), lower charge transfer resistance and increased electric double layer capacitance in 10 wt% Ag/MoS<sub>2</sub> clearly implies the enhanced HER performance as well as robust stability owing to improved interface between Ag and MoS<sub>2</sub> along with increased exposed active sites. Therefore, this work explicitly focuses on the study of in situ loading of Ag over MoS<sub>2</sub> which provided more accessibility to the active sites to elevate the HER activity.</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 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Constructing Bimetallic ZrCo-MOF Acidic Materials for the Selective Epoxidation of Limonene
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2025-02-26 DOI: 10.1007/s10562-025-04972-3
Haifu Zhang, Shaohong Zhang, Ying Zhang, Xiumei Chen, Hongjun Zhan, Dongming Cai
{"title":"Constructing Bimetallic ZrCo-MOF Acidic Materials for the Selective Epoxidation of Limonene","authors":"Haifu Zhang,&nbsp;Shaohong Zhang,&nbsp;Ying Zhang,&nbsp;Xiumei Chen,&nbsp;Hongjun Zhan,&nbsp;Dongming Cai","doi":"10.1007/s10562-025-04972-3","DOIUrl":"10.1007/s10562-025-04972-3","url":null,"abstract":"<div><p>The selective epoxy product of limonene, specifically 1, 2-limonene epoxide, serves as a crucial intermediate with diverse applications. However, achieving high conversion rates and selectivity in selective epoxidation reactions presents significant challenges. In this study, the bimetallic metal-organic framework (MOF) material was synthesized via a hydrothermal method, which was designated as Zr<sub>2</sub>Co<sub>8</sub>-MOF-BTC-H. The incorporation of zirconium (Zr) markedly alters both the morphology and structure of the bimetallic Zr<sub>2</sub>Co<sub>8</sub>-MOF-BTC-H catalytic material. Notably, there were pronounced changes in the binding energies of the bimetallic elements within the Zr<sub>2</sub>Co<sub>8</sub>-MOF-BTC-H framework, which suggests that cobalt (Co) and Zr coexist within the coordination structure and exhibit substantial interactions. Compared to single-metal MOF materials, the acidity of the bimetallic Zr<sub>2</sub>Co<sub>8</sub>-MOF-BTC-H was significantly enhanced, thereby facilitating the selective epoxidation of limonene. Under optimal reaction conditions, epoxidation conversion achieved 91.8%, while selectivity for epoxy compounds reached 88.6%. Furthermore, after five cycles of use, there was no significant decline in activity for the Zr<sub>2</sub>Co<sub>8</sub>-MOF-BTC-H material, indicative of its remarkable recyclable stability.</p></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tailoring Ni + Sr-MgO Catalysts for Efficient Dry Reforming of Methane: A Performance Study
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2025-02-26 DOI: 10.1007/s10562-025-04966-1
Abdulaziz Bentalib, Dalia A. Ali, Maher M. Alrashed, Ahmed A. Ibrahim, Alaaddin M. M. Saeed, Anis H. Fakeeha, Ahmed E. Abasaeed, Rawesh Kumar, Ahmed S. Al-Fatesh
{"title":"Tailoring Ni + Sr-MgO Catalysts for Efficient Dry Reforming of Methane: A Performance Study","authors":"Abdulaziz Bentalib,&nbsp;Dalia A. Ali,&nbsp;Maher M. Alrashed,&nbsp;Ahmed A. Ibrahim,&nbsp;Alaaddin M. M. Saeed,&nbsp;Anis H. Fakeeha,&nbsp;Ahmed E. Abasaeed,&nbsp;Rawesh Kumar,&nbsp;Ahmed S. Al-Fatesh","doi":"10.1007/s10562-025-04966-1","DOIUrl":"10.1007/s10562-025-04966-1","url":null,"abstract":"<div><p>This research paper examines the performance of strontium (Sr) promoted nickel (Ni) catalysts supported on magnesium oxide (MgO) in the dry reforming of methane (DRM) into syngas. The characterization of these catalysts is carried out using a range of analytical techniques, including measurements of surface area and porosity, thermogravimetric analysis (TGA), X-ray diffraction (XRD), transmission electron microscopy (TEM), hydrogen temperature-programmed reduction (H<sub>2</sub>-TPR), temperature-programmed oxidation (TPO) and desorption (TPD) studies. The concentration of active sites, as well as the presence of acid and basic sites on the catalyst surface, are the primary factors influencing the catalytic activity of the 5Ni + xSr-MgO catalysts (where x = 1, 2, 3, and 4 wt%). Ni, supported over MgO, has few active sites and lacks a strong basic site, which results in minimum catalytic activity. Adding 1–4 wt% Sr over 5Ni-MgO induces the formation of higher concentrations of active sites and an increased population of strong basic sites. At 3 wt% Sr loading, concentration of active sits, strong basic sites, and strong acid sites are optimum which can activate CH<sub>4</sub> and CO<sub>2</sub> timely for DRM rather than coke deposition. So, 5Ni + 3Sr-MgO achieved 58.4% CH<sub>4</sub> conversion (with H<sub>2</sub>/CO ratio 1.1) at 700 <sup>°</sup>C and ~ 82% CH<sub>4</sub> conversion at 750 <sup>°</sup>C. This study offers insights for turning a cheap catalyst system (5Ni-MgO) into a high-performance catalyst by optimum loading of Sr promotor.</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 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Construction of Atomically Dispersed Niδ+ Species on Leaf-like Al2O3 for Selective Transfer Hydrogenation of Furfural
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2025-02-26 DOI: 10.1007/s10562-025-04965-2
Qian Zhang, Yuanzheng Li, Zhengyi Pan, Guang-Hui Wang
{"title":"Construction of Atomically Dispersed Niδ+ Species on Leaf-like Al2O3 for Selective Transfer Hydrogenation of Furfural","authors":"Qian Zhang,&nbsp;Yuanzheng Li,&nbsp;Zhengyi Pan,&nbsp;Guang-Hui Wang","doi":"10.1007/s10562-025-04965-2","DOIUrl":"10.1007/s10562-025-04965-2","url":null,"abstract":"<div><p>Catalytic transfer hydrogenation (CTH) of <i>α</i>,<i>β</i>-unsaturated aldehydes to <i>α</i>,<i>β</i>-unsaturated alcohols over metal oxide catalysts is of potential for industrial application. Herein, we have developed a Ni/f<i>-</i>Al<sub>2</sub>O<sub>3</sub> catalyst comprising atomically dispersed Ni<sup><i>δ</i>+</sup> (2 &lt; <i>δ</i> &lt; 3) species on porous leaf-like Al<sub>2</sub>O<sub>3</sub>, over which a &gt; 97% yield of furfuryl alcohol (FOL) from CTH of furfural (FFR) is obtained with a turnover frequency (TOF) of 216 h<sup>− 1</sup>. Most importantly, the catalyst can be recycled at least 6 times without obvious loss of activity. Its superior catalytic performance can be attributed to the abundant and stable Ni<sup><i>δ</i>+</sup>-type acid-base pairs on the surface of Ni/f<i>-</i>Al<sub>2</sub>O<sub>3</sub>.</p></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Sustainable and Recyclable Heterogeneous Catalyst Comprising Dodecatungstophosphoric Acid and SBA-16: Synthesis, Characterizations and Study on the Synthesis of Levulinate
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2025-02-26 DOI: 10.1007/s10562-025-04961-6
Anjali Patel, Anwar Multani
{"title":"A Sustainable and Recyclable Heterogeneous Catalyst Comprising Dodecatungstophosphoric Acid and SBA-16: Synthesis, Characterizations and Study on the Synthesis of Levulinate","authors":"Anjali Patel,&nbsp;Anwar Multani","doi":"10.1007/s10562-025-04961-6","DOIUrl":"10.1007/s10562-025-04961-6","url":null,"abstract":"<div><p>In this study, a heterogeneous catalyst was designed by comprising dodecatungstophosphoric acid and SBA-16 by wet impregnation method. It is characterized by different physiochemical techniques BET, EDX, TGA, FT-IR, <sup>29</sup>Si NMR spectroscopy, and TEM. The chemicals shift of the Si–O–Si peaks in the <sup>29</sup>Si NMR suggesting strong interaction between the active species and support. Its catalytic activity showed significant performance in the production of butyl levulinate, a promising fuel blend candidate via esterification of levulinic acid with n-butanol (93% conversion and 99% selectivity), following second order kinetic reaction with an activation energy 64 kJ/mol. Characterization of the recycled catalyst shows intact properties and reusability for up to three consecutive cycles. The present catalyst is superior to the previously reported ones with an outstanding turnover number (3571) and turnover frequency (595 h<sup>−1</sup>). The industrial applicability of the catalyst was demonstrated by the esterification of different bio-based acids with minimal environmental impact.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 4","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143489530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reducing the Surface Acidity of Pd/NaY Catalyst by Alkali Phosphates Modification to Improve the Selectivity of Dimethyl Carbonate
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2025-02-21 DOI: 10.1007/s10562-025-04952-7
Bo-Wei Shi, Xiao-Yuan Tan, Ming-Sheng Wang, Jing Sun, Zhong-Ning Xu, Guo-Cong Guo
{"title":"Reducing the Surface Acidity of Pd/NaY Catalyst by Alkali Phosphates Modification to Improve the Selectivity of Dimethyl Carbonate","authors":"Bo-Wei Shi,&nbsp;Xiao-Yuan Tan,&nbsp;Ming-Sheng Wang,&nbsp;Jing Sun,&nbsp;Zhong-Ning Xu,&nbsp;Guo-Cong Guo","doi":"10.1007/s10562-025-04952-7","DOIUrl":"10.1007/s10562-025-04952-7","url":null,"abstract":"<div><p>CO esterification to dimethyl carbonate (DMC) routes holds significant economic and environmental value. Nevertheless, industrial routes suffer from drawbacks, such as raw material methyl nitrite (MN) was decomposed into by-products dimethoxymethane (DMM) and methyl formate (MF), which caused subsequent separation problem for the product/reactant mixture, which results in additional production cost. Previous studies have demonstrated that the acid site of NaY play an essential role in promoting the decomposition of MN. Herein, a series of Na<sub>2</sub>HPO<sub>4</sub> -modified Pd/NaY catalysts were prepared to solve these problems. The results indicated that the introduction of Na<sub>2</sub>HPO<sub>4</sub> increased the DMC selectivity (from 55% to 83%) and decreased the by-products selectivity [DMM (from 22% to 10%), MF (from 23% to 7%)] of Pd/PNaY-12 significantly. Based on the results of Py-IR, the amounts of Lewis acidic sites decreased, and NH<sub>3</sub>-TPD analysis shown that the amounts of weak acid sites (from 0.33 mmol/g to 0.14 mmol/g) and medium strong acid sites (from 0.46 mmol/g to 0.10 mmol/g) also reduced obviously. The outstanding performance should be attributed to the fact that the important intermediate *COOCH<sub>3</sub> was more readily obtained after Na<sub>2</sub>HPO<sub>4</sub> was incorporated. This work provides a convenient strategy for developing catalysts with high selectivity and low by-products.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 3","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Excellent Catalytic Performance of FeSiBPY Amorphous Alloy Ribbons in the Degradation of Different Structure Dyes
IF 2.3 4区 化学
Catalysis Letters Pub Date : 2025-02-20 DOI: 10.1007/s10562-025-04954-5
Li Ji, Ran Yu, Wangpeng Qiu, Jin Liu
{"title":"Excellent Catalytic Performance of FeSiBPY Amorphous Alloy Ribbons in the Degradation of Different Structure Dyes","authors":"Li Ji,&nbsp;Ran Yu,&nbsp;Wangpeng Qiu,&nbsp;Jin Liu","doi":"10.1007/s10562-025-04954-5","DOIUrl":"10.1007/s10562-025-04954-5","url":null,"abstract":"<p>Fe<sub>78</sub>Si<sub>7</sub>B<sub>12.4</sub>P<sub>2</sub>Y<sub>0.6</sub> amorphous alloy ribbons are proved to show excellent degradation performance in the treatment of dyes with diverse structures. The Fe<sub>78</sub>Si<sub>7</sub>B<sub>12.4</sub>P<sub>2</sub>Y<sub>0.6</sub> amorphous alloy ribbons can degrade Orange II azo dye, Malachite green (MG) diamino-triphenylmethane dye and their mixed dye almost completely within 10 min. Analysis of the surface morphologies and electronic structure before and after degradation reveals that the densely distributed nano-porous structure and the galvanic cell formed between Fe–P and Fe-B contribute to enhancing the degradation performance in Fenton-like process. The reaction rate constant of MG dye is 0.269 min<sup>−1</sup>, which is higher than that of orange II azo dye (0.123 min<sup>−1</sup>), indicating that different dye structure have certain effects on the degradation performance of the alloy under the same reaction conditions. Furthermore, the degradation performance of Fe<sub>78</sub>Si<sub>7</sub>B<sub>12.4</sub>P<sub>2</sub>Y<sub>0.6</sub> amorphous alloy ribbons on MG dye was also evaluated under various Fenton-like reaction conditions, including different initial dye concentrations, temperatures, pH levels, and catalyst additions. The results showed that the optimum reaction conditions: C<sub>cat</sub> = 6 g/L, C<sub>MG dye</sub> = 10 mg/L, C<sub>H2O2</sub> = 10 mM, pH = 3, T = 65 ℃. This study has great practical significance for promoting the industrial application of Fe-based amorphous alloys.</p>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 3","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143455704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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