Reaction Kinetics, Mechanisms and Catalysis最新文献_第4页

Kinetics of toluene disproportionation over modified HZSM-5: selective synthesis of p-xylene 改性HZSM-5上甲苯歧化动力学：对二甲苯的选择性合成

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-01-15 DOI: 10.1007/s11144-024-02791-y

Lakshmana Rao Jeeru, Snigdha Senapati, Narendra Singh Chaudhary, B. V. S. Praveen, Narayan C. Pradhan

引用次数: 0

Visible-light-active ‘bismuth tungstate/curcuma longa’ z-scheme heterostructured photocatalyst for the degradation of methyl orange and phenol 可见光活性“钨酸铋/姜黄”z型异质结构光催化剂降解甲基橙和苯酚

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-01-14 DOI: 10.1007/s11144-025-02796-1

Isha Arora, Seema Garg, Harshita Chawla, Andras Sapi, Pravin Popinand Ingole, Suresh Sagadeven, Azmat Ali Khan, Sabiha Fatima, Amrish Chandra

{"title":"Visible-light-active ‘bismuth tungstate/curcuma longa’ z-scheme heterostructured photocatalyst for the degradation of methyl orange and phenol","authors":"Isha Arora, Seema Garg, Harshita Chawla, Andras Sapi, Pravin Popinand Ingole, Suresh Sagadeven, Azmat Ali Khan, Sabiha Fatima, Amrish Chandra","doi":"10.1007/s11144-025-02796-1","DOIUrl":"10.1007/s11144-025-02796-1","url":null,"abstract":"<div><p>In the present work, bismuth tungstate nanoflowers were fabricated via hydrolysis method using curcuma longa extract (Bi<sub>2</sub>WO<sub>6</sub>-G) and without extract (Bi<sub>2</sub>WO<sub>6</sub>-C). The analytes were characterized using X-ray diffraction, BET, Transmission electron microscopy (TEM), Field emission scanning electron microscopy (FESEM), UV–vis. DRS Spectroscopy. The as-fabricated nanostructures have been tested for photocatalytic degradation of methyl orange (MO) dye and a recalcitrant pollutant ‘phenol’. The present study showcased the effect of curcuma longa extract, an efficient adsorbent “curcuma longa” which is a rhizome of yellow turmeric on Bismuth tungstate photocatalyst. The improved photocatalytic performance of Bi<sub>2</sub>WO<sub>6</sub>/curcuma longa (Bi<sub>2</sub>WO<sub>6</sub>-G) heterostructure was mainly ascribed to the unique hierarchical structure, harvesting extended absorption of visible light, higher surface area and inhibiting recombination of photogenerated charges. The current findings may provide new insights to the effect of green extracts for fabrication of nanomaterials for enhanced photocatalytic efficiency.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 3","pages":"1797 - 1811"},"PeriodicalIF":1.7,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135408","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

Mechanistic and enantioselectivity analysis of amino acid-catalyzed asymmetric aldol reactions: a theoretical study 氨基酸催化不对称醛醇反应的机理和对映体选择性分析：理论研究

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-01-13 DOI: 10.1007/s11144-025-02799-y

Chao-Xian Yan, Dan-Feng Li, Ling-Jian Yang, Lin-Xing Fu, Xin-Qiang Hua

引用次数: 0

Catalytic oxidation of 1,2-dichloroethane over CrOx/Co3O4 catalysts by incorporating CrOx into ZIF-67 derived Co3O4 在ZIF-67衍生的Co3O4中加入CrOx催化氧化1,2-二氯乙烷

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-01-13 DOI: 10.1007/s11144-025-02797-0

Jialin Lv, Pengfei Zhu, Shuaini Wu, Na Li, Zhaoxia Hu, Shouwen Chen

{"title":"Catalytic oxidation of 1,2-dichloroethane over CrOx/Co3O4 catalysts by incorporating CrOx into ZIF-67 derived Co3O4","authors":"Jialin Lv, Pengfei Zhu, Shuaini Wu, Na Li, Zhaoxia Hu, Shouwen Chen","doi":"10.1007/s11144-025-02797-0","DOIUrl":"10.1007/s11144-025-02797-0","url":null,"abstract":"<div><p>To address the challenges of limited catalytic efficiency and chlorine poisoning in chlorinated volatile organic compounds (CVOCs) catalytic oxidation, chromium was incorporated into Co<sub>3</sub>O<sub>4</sub> derived from zeolitic imidazolate framework-67 (ZIF-67), leading to the development of chromium-cobalt bimetallic oxide CrO<sub>x</sub>/Co<sub>3</sub>O<sub>4</sub> for the efficient catalytic degradation of 1,2-dichloroethane (1,2-DCE). The utilization of the ZIF-67 precursor in the construction of the CrO<sub>x</sub>/Co<sub>3</sub>O<sub>4</sub> catalysts improves the specific surface area, the incorporation of CrO<sub>x</sub> renders abundant surface acidic sites, rich adsorbed oxygen species and Co<sup>3+</sup>/Co<sup>2+</sup>, Cr<sup>6+</sup>/Cr<sup>3+</sup> redox couples. The catalytic performance results indicate that the CrO<sub>x</sub>/Co<sub>3</sub>O<sub>4</sub> catalysts exhibit remarkable catalytic activity and stability for 1,2-DCE, particularly the amorphous 30CrO<sub>x</sub>/Co<sub>3</sub>O<sub>4</sub>, achieving a T<sub>90</sub> value of 265 °C and sustaining a conversion rate exceeding 90% at 290 °C for 24 h of stable operation at a gas hourly space velocity of 20,000 mL·g<sup>−1</sup>·h<sup>−1</sup>.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 3","pages":"1311 - 1329"},"PeriodicalIF":1.7,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11144-025-02797-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustainable remediation of an anionic dye in aqueous solutions using modified aluminosilicate as a highly efficient and reusable adsorbent 用改性硅酸铝作为高效可重复使用吸附剂对阴离子染料进行可持续修复

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-01-13 DOI: 10.1007/s11144-025-02794-3

Hadjer Bousemat, Samira Ziane-Hezil, Fatiha Bessaha

{"title":"Sustainable remediation of an anionic dye in aqueous solutions using modified aluminosilicate as a highly efficient and reusable adsorbent","authors":"Hadjer Bousemat, Samira Ziane-Hezil, Fatiha Bessaha","doi":"10.1007/s11144-025-02794-3","DOIUrl":"10.1007/s11144-025-02794-3","url":null,"abstract":"<div><p>This study aims to remove an anionic dye, namely Bemacid Blue (BB), from an aqueous solution using an aluminosilicate adsorbent. The adsorbent was characterized using XRD, SEM, Zeta potential, and BET analysis. The results show that BET analysis resulted in a significant increase in specific surface area (from 15.84 to 101.6 m<sup>2</sup> g<sup>−1</sup>). Following the isoelectric point determination, zeta potential analysis revealed electrostatic interactions. The experimental results show that optimal adsorption occurs at a pH of 6.1 after 120 min of contact at 55 °C, with an adsorption capacity of 202.75 mg g<sup>−1</sup>, allowing for the treatment of solutions containing up to 800 mg L<sup>−1</sup> of pollutant. The pseudo-second order and Elovich models had the highest correlation coefficients (R<sup>2</sup> > 0.999), indicating complex adsorption mechanisms. Adsorption isotherms fit the Langmuir–Freundlich model of heterogeneous adsorption. The scanning electron microscopy (SEM) analysis confirmed good adsorption, with pores filled after adsorption. The use of energy dispersive spectroscopy (EDX) revealed that adsorption mechanisms included hydrogen bonding, ion exchange, and hydrophobic and electrostatic interactions. Finally, material regeneration tests resulted in 60% desorption after five successful cycles. This study demonstrates the effectiveness and stability of this aluminosilicate in adsorption and regeneration processes, paving the way for potential applications in the treatment of highly polluted industrial effluents containing anionic toxic contaminants.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 3","pages":"1517 - 1534"},"PeriodicalIF":1.7,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135403","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

Comparative study of the reaction characteristics and kinetics of catalytic hydrogenation involving propylene, 1-butene, and their mixture over Pt/ZrO2 Pt/ZrO2催化丙烯、1-丁烯及其混合物加氢反应特性和动力学的比较研究

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-01-12 DOI: 10.1007/s11144-024-02792-x

Shunsuke Suzuki, Junko Uchisawa, Akira Obuchi, Asuka Yamamoto, Toshihiko Sakai, Makoto Nagata, Masatoshi Yoshimura

{"title":"Comparative study of the reaction characteristics and kinetics of catalytic hydrogenation involving propylene, 1-butene, and their mixture over Pt/ZrO2","authors":"Shunsuke Suzuki, Junko Uchisawa, Akira Obuchi, Asuka Yamamoto, Toshihiko Sakai, Makoto Nagata, Masatoshi Yoshimura","doi":"10.1007/s11144-024-02792-x","DOIUrl":"10.1007/s11144-024-02792-x","url":null,"abstract":"<div><p>In this study, the hydrogenation reaction of propylene, 1-butene, and their equimolar mixture was conducted over a Pt/ZrO<sub>2</sub> catalyst with varying temperatures and initial gas compositions, in order to compare the reaction characteristics and kinetics of hydrogenation involving propylene and 1-butene. The results demonstrated that the conversion of propylene was generally higher than that of 1-butene, with the difference being less pronounced in a mixture feedstock. A kinetic model based on the Langmuir–Hinshelwood mechanism was developed for each feedstock. After optimization of the parameters included in the model while meeting the physicochemical constraints, the present model was successful in reproducing the measured data, with an error margin of less than 20%. Particularly, due to the similarity of reaction characteristics between propylene and 1-butene in a mixture feedstock, it was suggested that treating them as one olefin is a good option for simplifying the rate equation <span>({text{F}}_{{{text{C}}_{{text{n}}} {text{H}}_{{text{2n,}}} {0}}})</span> . <span>({text{P}}_{{{text{C}}_{{text{n}}} {text{H}}_{{2{text{n}}}} }})</span> . <span>({text{x}}_{{{text{C}}_{{text{n}}} {text{H}}_{{2{text{n}}}} }})</span> .</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 3","pages":"1295 - 1310"},"PeriodicalIF":1.7,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11144-024-02792-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Supported Pd–B alloy mesoporous nanospheres as efficient catalysts for nitrobenzene hydrogenation 负载型Pd-B合金介孔纳米微球作为硝基苯加氢的高效催化剂

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-01-07 DOI: 10.1007/s11144-024-02793-w

Yunkai Zhang, Lei Wang, Shenghu Zhou

引用次数: 0

Two reactions, two sites, two adsorption coefficients: a kinetic and mechanistic study of the dehydration of 2-octanol on amberlyst®15 catalyst 两个反应，两个位置，两个吸附系数：amberlyst®15催化剂上2-辛醇脱水的动力学和机理研究

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-01-04 DOI: 10.1007/s11144-024-02788-7

Jeffrey C. Gee, Karen W. Fulbright

{"title":"Two reactions, two sites, two adsorption coefficients: a kinetic and mechanistic study of the dehydration of 2-octanol on amberlyst®15 catalyst","authors":"Jeffrey C. Gee, Karen W. Fulbright","doi":"10.1007/s11144-024-02788-7","DOIUrl":"10.1007/s11144-024-02788-7","url":null,"abstract":"<div><p>On dry Amberlyst®15 catalyst at 80 °C, 2-octanol undergoes irreversible dehydration to water and octenes. Ether formation is negligible, and reversible alkene double bond isomerization is slow. Kinetic data indicate that two different types of catalytic sites are active. On one site, all adsorbates have large (> 10) adsorption coefficients, and dehydration occurs here by a single site mechanism; on the second site, all adsorbates (except water) have small (< 0.2) adsorption coefficients. Dehydration and alkene double bond isomerization occur on both sites but at separate rates on each site. The site with weak adsorption loses activity rapidly as water forms, while the site with strong adsorption remains active much longer than the other and catalyzes most of the dehydration. Water adsorbs strongly to both sites and inhibits dehydration and double bond isomerization both by competing for vacant active sites and by displacing adsorbed 2-octanol (but not alkenes) directly from the active sites. The existence of two different types of active sites that lose activity at substantially different rates early in the reaction sometimes confounds the interpretation of initial rate data.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 1","pages":"3 - 29"},"PeriodicalIF":1.7,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143404162","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 a visible light-driven HC/BiOCl/SnO2 heterojunction for photocatalytic degradation of rhodamine B 可见光驱动HC/BiOCl/SnO2异质结光催化降解罗丹明B的构建

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-01-04 DOI: 10.1007/s11144-024-02781-0

Yulan Ren, Yong Li, Shuang Gao, Yuwei Zhu, Xinyu Liu

{"title":"Construction of a visible light-driven HC/BiOCl/SnO2 heterojunction for photocatalytic degradation of rhodamine B","authors":"Yulan Ren, Yong Li, Shuang Gao, Yuwei Zhu, Xinyu Liu","doi":"10.1007/s11144-024-02781-0","DOIUrl":"10.1007/s11144-024-02781-0","url":null,"abstract":"<div><p>In this study, the HC/BiOCl/SnO<sub>2</sub> type I heterostructure was constructed by hydrothermal method for the degradation of rhodamine B (RhB). The photoluminescence spectra of HC/BiOCl/SnO<sub>2</sub> showed the lowest fluorescence intensity, indicating the low photoelectron-hole recombination rate of the catalyst. Electrochemical impedance test showed that the arc radius of HC/BiOCl/SnO<sub>2</sub> was obviously smaller than that of other samples, which indicated that the catalyst had strong electron migration ability and high separation efficiency of electron and hole. The degradation efficiencies of RhB and methylene blue (MB) by HC/BiOCl/SnO<sub>2</sub> were 99.49% and 66.46%, after 40 min of irradiation with visible light (70 W metal halide lamp). The results showed that the heterostructure had strong photocatalytic degradation ability for dye wastewater. The free radical capture experiments indicated that the main active species were h<sup>+</sup> and ·O<sub>2</sub><sup>−</sup>. After 4 cycles of HC/BiOCl/SnO<sub>2</sub> photocatalyst, the degradation efficiency of RhB was 83.25%, indicating that the photocatalyst had strong degradation ability and cycle stability. XRD of the catalyst before and after degradation showed that the composition of the catalyst did not change, which proved that the catalyst had good stability.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 3","pages":"1765 - 1775"},"PeriodicalIF":1.7,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135327","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

Spatio-temporal mapping of the redox potential in the Belousov-Zhabotinsky reaction using an uninsulated carbon fiber microelectrode in scanning electrochemical microscopy 扫描电化学显微镜下使用非绝缘碳纤维微电极对Belousov-Zhabotinsky反应中的氧化还原电位进行时空映射

IF 1.7 4区化学

Reaction Kinetics, Mechanisms and Catalysis Pub Date : 2025-01-03 DOI: 10.1007/s11144-024-02789-6

András Kiss, Szilárd Szili

{"title":"Spatio-temporal mapping of the redox potential in the Belousov-Zhabotinsky reaction using an uninsulated carbon fiber microelectrode in scanning electrochemical microscopy","authors":"András Kiss, Szilárd Szili","doi":"10.1007/s11144-024-02789-6","DOIUrl":"10.1007/s11144-024-02789-6","url":null,"abstract":"<div><p>In this work, we introduce a method that uses an uninsulated carbon fiber microelectrode as a potentiometric Scanning Electrochemical Microscopy (SECM) probe to investigate the Belousov–Zhabotinsky (BZ) reaction. We demonstrate that two-dimensional electrochemical scanning is achievable with a single electrode, as opposed to the stationary electrode measurements commonly reported for the BZ reaction in the present literature. Our approach allows even a highly sensitive reaction like the distributed BZ reaction to proceed undisturbed during measurement. While we chose redox potential as a proof-of-concept parameter due to its straightforward validation against established optical methods, the same setup is readily adaptable to measure other parameters – such as bromide ion concentration or pH – by simply replacing the microelectrode tip. By ensuring that the carbon fiber tip barely contacts the surface, we avoided the need for insulation and minimized disturbances that might otherwise affect the reaction. This work also demonstrates the significant potential of SECM with carbon fiber tips, particularly for scanning within the upper micrometers of a gas-liquid interface, exploiting the flatness of this interface.</p></div>","PeriodicalId":750,"journal":{"name":"Reaction Kinetics, Mechanisms and Catalysis","volume":"138 2","pages":"647 - 656"},"PeriodicalIF":1.7,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716829","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