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Unraveling the roles of Au in Au-Pt/MgFe2O4 for boosting catalytic oxidation of highly toxic CO
IF 3.9 2区 化学
Molecular Catalysis Pub Date : 2025-02-01 DOI: 10.1016/j.mcat.2024.114776
Fen Wang , Wenxiu Pang , Xiumiao Yang
{"title":"Unraveling the roles of Au in Au-Pt/MgFe2O4 for boosting catalytic oxidation of highly toxic CO","authors":"Fen Wang ,&nbsp;Wenxiu Pang ,&nbsp;Xiumiao Yang","doi":"10.1016/j.mcat.2024.114776","DOIUrl":"10.1016/j.mcat.2024.114776","url":null,"abstract":"<div><div>The catalytic oxidation technique has been generally acknowledged as an extremely effective way of removing highly toxic CO, where the key is to develop catalysts with high activity as well as stability. In this work, the MgFe<sub>2</sub>O<sub>4</sub> supported monometallic Pt-based and Au-based catalysts as well as bimetallic AuPt catalysts have been prepared through a sol-immobilization method and applied to the oxidation reaction of highly toxic CO. It was found that adding an appropriate amount of Au (0.6 wt.%) to 1Pt/MgFe<sub>2</sub>O<sub>4</sub> significantly enhances its catalytic activity and stability. During the stability test of 20 h, the 0.6Au-1Pt/MgFe<sub>2</sub>O<sub>4</sub> catalyst demonstrated high and stable CO conversion of 100 % at 165 °C and WHSV = 30,000 mL g<sub>cat.</sub><sup>−1</sup> h<sup>−1</sup>. Various characterization techniques such as ICP, XRD, STEM, EDS, XPS, and CO-TPD reveal that the bimetallic nanoparticles composed of Au and Pt have formed in bimetallic Au-Pt/MgFe<sub>2</sub>O<sub>4</sub> catalysts, where Pt donates electrons to Au. A more positive electronic state of Pt in 0.6Au–1Pt/MgFe<sub>2</sub>O<sub>4</sub> and 1Au–1Pt/MgFe<sub>2</sub>O<sub>4</sub> helps to reduce the adsorption strength of CO on catalysts, resulting the better CO oxidation performance compared with monometallic 1Pt/MgFe<sub>2</sub>O<sub>4</sub> catalyst. These insights into the crucial structure needed for highly active and stable Pt catalysts in CO oxidation will contribute to designing even more excellent catalysts for CO oxidation in the future.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"572 ","pages":"Article 114776"},"PeriodicalIF":3.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 First Principles exploration of pristine and p-block doped triangulene carbon dots for Hydrogen evolution reaction
IF 3.9 2区 化学
Molecular Catalysis Pub Date : 2025-02-01 DOI: 10.1016/j.mcat.2024.114766
Ashvin Kanzariya , Narayan N. Som , Shardul Vadalkar , Sourav Kanti Jana , L.K. Saini , Prafulla K. Jha
{"title":"A First Principles exploration of pristine and p-block doped triangulene carbon dots for Hydrogen evolution reaction","authors":"Ashvin Kanzariya ,&nbsp;Narayan N. Som ,&nbsp;Shardul Vadalkar ,&nbsp;Sourav Kanti Jana ,&nbsp;L.K. Saini ,&nbsp;Prafulla K. Jha","doi":"10.1016/j.mcat.2024.114766","DOIUrl":"10.1016/j.mcat.2024.114766","url":null,"abstract":"<div><div>The global pursuit of clean and sustainable energy sources has driven significant research into the hydrogen evolution reaction (HER). In this process, we need catalysts that outperform noble metals, and Triangulene carbon dots (TCDs) are prospective suitors. Therefore, in this study, we explore the potential of pristine and p-block element-doped TCDs as alternative electrocatalysts for HER. Stability is one of the most important virtues for a material to be a good catalyst. We have investigated the cohesive energy and formation energy of doped TCDs, and we observed that N-doped and B-doped TCDs are the most favorable energetically. We observed a lowering of the energy gap with doping, except for Si, leading to an increase in conductivity, which is expected to result in better HER activity. The increased conductivity leads to higher charge transfer between the H atom and TCDs, as validated through Mulliken charge plots. To confirm the enhanced HER activity, we computed the Gibbs free energies, and N-doped TCDs outperformed pristine TCD and B-doped TCD in HER activity, followed by the others, also corroborated by the volcano plot.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"572 ","pages":"Article 114766"},"PeriodicalIF":3.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Influence of synergy effect over the catalyst derived from CuFe-LDHs on SCR-C3H6: An in situ DRIFTS study
IF 3.9 2区 化学
Molecular Catalysis Pub Date : 2025-02-01 DOI: 10.1016/j.mcat.2024.114772
Nini Wen , Hao Zhou , Muhammad Kashif , Yaxin Su , Haijiao Cui
{"title":"Influence of synergy effect over the catalyst derived from CuFe-LDHs on SCR-C3H6: An in situ DRIFTS study","authors":"Nini Wen ,&nbsp;Hao Zhou ,&nbsp;Muhammad Kashif ,&nbsp;Yaxin Su ,&nbsp;Haijiao Cui","doi":"10.1016/j.mcat.2024.114772","DOIUrl":"10.1016/j.mcat.2024.114772","url":null,"abstract":"<div><div>The synergy between multi-metals can enhance the catalytic performance of catalysts but lacks research from the perspective of reaction mechanisms. Hence, the correlation between the synergy effect and the SCR-C<sub>3</sub>H<sub>6</sub> reaction mechanism was investigated over the CuFe-LDOs catalyst derived from the precursor CuFe-LDHs, and single metal oxide catalysts (CuO, Fe<sub>2</sub>O<sub>3</sub>). XPS and H<sub>2</sub>-TPR techniques reveal the existence of the synergy effect between Cu and Fe, which results in the superior catalytic activity of the CuFe-LDOs catalyst than single metal oxide catalysts, as well as the generation of CuFe<sub>2</sub>O<sub>4</sub> over the CuFe-LDOs catalyst. Numerous static and dynamic <em>In situ</em> DRIFTS and TPSR experiments indicate that the synergy effect encourages the creation of nitrogenous species, especially active intermediates like monodentate, bidentate, and bridging nitrates. Besides, the production of active carboxylate acetate also obtains enhancement owing to the synergy effect. Importantly, R-NCO generates and accumulates profited from the synergy effect, working as the vital intermediate for SCR-C<sub>3</sub>H<sub>6</sub>, and is ultimately hydrolyzed to CO<sub>2</sub>, N<sub>2</sub>, and H<sub>2</sub>O. These results demonstrate that the improvement of catalytic activity for the CuFe-LDOs catalyst benefits from the promotion of the synergy effect on active intermediates. Eventually, a possible SCR-C<sub>3</sub>H<sub>6</sub> reaction pathway on the CuFe-LDOs catalyst is established.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"572 ","pages":"Article 114772"},"PeriodicalIF":3.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Fe-modified Cu/TiO2 catalyst with anti-Pb poisoning performance for the synergistic catalysis of NH3-SCR and CO oxidation
IF 3.9 2区 化学
Molecular Catalysis Pub Date : 2025-02-01 DOI: 10.1016/j.mcat.2024.114773
Yang-wen Wu, Zheng-long Wu, Hai-yuan Zhao, Xu Su, Ji-hong Li, Qiang Lu
{"title":"Fe-modified Cu/TiO2 catalyst with anti-Pb poisoning performance for the synergistic catalysis of NH3-SCR and CO oxidation","authors":"Yang-wen Wu,&nbsp;Zheng-long Wu,&nbsp;Hai-yuan Zhao,&nbsp;Xu Su,&nbsp;Ji-hong Li,&nbsp;Qiang Lu","doi":"10.1016/j.mcat.2024.114773","DOIUrl":"10.1016/j.mcat.2024.114773","url":null,"abstract":"<div><div>Nitrogen oxides (NO<em><sub>x</sub></em>) and carbon monoxide (CO) are two major pollutants in industrial flue gas. Currently, ammonia selective catalytic reduction (NH<sub>3</sub>-SCR) and CO oxidation catalysts are susceptible to heavy metal impurities such as Pb, which leads to a reduction in catalytic activities. In this study, an excellent anti-Pb poisoning Fe-enhanced Cu/TiO<sub>2</sub> catalyst was prepared for the synergistic control of NO and CO with maximum 91.2 % and 99 % conversion ratios at 275 °C. The active components of the modified catalyst were well dispersed on the TiO<sub>2</sub>. The doping of Fe alleviated the surface aggregation caused by Pb, while the pore size was decreased and the specific surface area was increased. Synergistic interaction between Cu and Fe produced more variable valence states, leading to highly active chemisorbed oxygen and oxygen vacancies, which were beneficial for the NO and CO removal. Furthermore, after Fe loading more acidic sites were retained on the catalyst surface, which improved the oxidation–reduction characteristics of the catalyst. This research presents a viable approach for designing efficient catalyst for the concurrent removal of NO and CO from industrial emissions while demonstrating great resistance to Pb-poisoning.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"572 ","pages":"Article 114773"},"PeriodicalIF":3.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Robust tetrazole-linked bimetallic Ru(II) complexes as catalysts for base-free acceptor-less double dehydrogenation of primary amines to nitriles under milder conditions
IF 3.9 2区 化学
Molecular Catalysis Pub Date : 2025-02-01 DOI: 10.1016/j.mcat.2024.114797
Nimesh R. Chauhan , Sakshi , Angshuman Roy Choudhury , Komal M. Vyas
{"title":"Robust tetrazole-linked bimetallic Ru(II) complexes as catalysts for base-free acceptor-less double dehydrogenation of primary amines to nitriles under milder conditions","authors":"Nimesh R. Chauhan ,&nbsp;Sakshi ,&nbsp;Angshuman Roy Choudhury ,&nbsp;Komal M. Vyas","doi":"10.1016/j.mcat.2024.114797","DOIUrl":"10.1016/j.mcat.2024.114797","url":null,"abstract":"<div><div>The catalytic double dehydrogenation (DDH) of primary amines is a clean and efficient method over aerobic oxidation. Further, the utilization of bimetallic catalytic system for DDH has proven to be more efficient than its monometallic counterpart. However, its large scale adoption for industrial application is limited owing to the usage of expensive and environmentally adverse catalytic conditions. In this context, the present study describes the first example of tetrazole-derived two bimetallic Ru(II)-arene complexes [(η<sup>6</sup>-<em>p</em>-cymene)<sub>2</sub>Ru<sub>2</sub>Cl<sub>3</sub>(L1)] <strong>[Ru-1]</strong> and [(η<sup>6</sup>-benzene)<sub>2</sub>Ru<sub>2</sub>Cl<sub>3</sub>(L1)] <strong>[Ru-2]</strong> (where, L1 = 4-(1<em>H</em>-tetrazole-5yl)benzoic acid) for acceptor-less double dehydrogenation of primary amines under oxidant and base free conditions. The results suggest that the electron rich <strong>[Ru-1]</strong> has outperformed due to its high solubility, high electron density and more charge separation as compared to <strong>[Ru-2]</strong>. The mechanistic studies reveal that electrophilic centre of <strong>[Ru-1]</strong> easily associates with substrate, whereas nucleophilic metal centre abstracts β-hydrogen of primary amine <em>via</em> thermodynamically more favourable six-membered transition state as compared to traditional four membered transition state in monometallic system. Further, the catalytic investigation proves that electron rich aromatic primary amines and aliphatic amines are more powerful than bidentate substrates which deactivate the catalyst suggesting the bimetallic dehydrogenation pathway for primary amines. Overall, this research opens the possibility of exploring tetrazole linked bimetallic complexes as an industry efficient solution for transition of primary amines to nitriles.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"572 ","pages":"Article 114797"},"PeriodicalIF":3.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 efficient and stable non-noble metal CoM@NC (M = Ni, Mo) catalysts for NH3 decomposition
IF 3.9 2区 化学
Molecular Catalysis Pub Date : 2025-02-01 DOI: 10.1016/j.mcat.2024.114800
Yanping Yuan , Wenbo Wang , Dongfang Li , Ruhao Hu , Anru Yan , Zhiyong Wang
{"title":"Highly efficient and stable non-noble metal CoM@NC (M = Ni, Mo) catalysts for NH3 decomposition","authors":"Yanping Yuan ,&nbsp;Wenbo Wang ,&nbsp;Dongfang Li ,&nbsp;Ruhao Hu ,&nbsp;Anru Yan ,&nbsp;Zhiyong Wang","doi":"10.1016/j.mcat.2024.114800","DOIUrl":"10.1016/j.mcat.2024.114800","url":null,"abstract":"<div><div>Ammonia, as a promising hydrogen carrier, has garnered significant attention due to its high energy density, ease of transportation, and non-toxic decomposition process, and the absence of harmful by-products. Ammonia can produce hydrogen through the thermochemical ammonia decomposition reaction, requiring efficient catalysts. Although Ru-based catalysts exhibit high activity, their application is limited due to their high cost and scarcity. Here, a series of highly efficient and stable non-noble CoM@NC (M = Ni, Mo) bimetallic catalysts with N-doped carbon frameworks embedded in ZIF-67 templates are synthesized for ammonia decomposition to hydrogen. The impact of non-noble metal composition and ratios on the performance of ammonia decomposition is primarily investigated. The experimental results show that: 1) The catalytic performance of the ammonia decomposition catalyst can be regulated by adjusting the catalyst composition and metal ratios; 2) Compared to CoNi@NC catalysts, CoMo@NC catalysts exhibit superior performance in ammonia decomposition; 3) Co<sub>1</sub>Mo<sub>1</sub>@NC catalyst achieves an ammonia conversion rate of 97.57 % at 550 °C under the conditions of 30,000 mL h<sup>-1 g</sup>-1 cat, with a hydrogen production rate of 32.66 mmol H<sub>2</sub> g-1 cat min<sup>-1</sup>; 4) Even in extreme conditions of 600 °C and 60,000 mL h<sup>-1 g</sup>-1 cat for 300 h, the ammonia decomposition activity of the Co<sub>1</sub>Mo<sub>1</sub>@NC catalyst remains unchanged; 5) The excellent catalytic performance of Co<sub>1</sub>Mo<sub>1</sub>@NC catalyst is attributed to its porous layered petal-like structure providing a fast pathway for electron transfer, the presence of Co<sub>3</sub>Mo<sub>3</sub> N bimetallic nitride with more Mo-N active sites, and its strong alkaline nature. This study offers significant importance for the further development of non-noble metal cobalt-based catalysts for ammonia decomposition.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"572 ","pages":"Article 114800"},"PeriodicalIF":3.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Promoting effect of Fe on Pt/ZSM-5 catalysts for propane dehydrogenation
IF 3.9 2区 化学
Molecular Catalysis Pub Date : 2025-02-01 DOI: 10.1016/j.mcat.2024.114768
Fangli Jing , Xiangping Lv , Yuanyang Pi , Yuanyuan Zhang , Huan Xiang , Shizhong Luo
{"title":"Promoting effect of Fe on Pt/ZSM-5 catalysts for propane dehydrogenation","authors":"Fangli Jing ,&nbsp;Xiangping Lv ,&nbsp;Yuanyang Pi ,&nbsp;Yuanyuan Zhang ,&nbsp;Huan Xiang ,&nbsp;Shizhong Luo","doi":"10.1016/j.mcat.2024.114768","DOIUrl":"10.1016/j.mcat.2024.114768","url":null,"abstract":"<div><div>Propane dehydrogenation (PDH) is an attractive method for propylene production. PtxFe/ZSM-5 catalysts were prepared by the sequential incipient wetness impregnation of Fe and Pt on ZSM-5 support. The promoting effect of Fe on the catalytic performance of PtxFe/ZSM-5 during propane dehydrogenation reaction was studied. Various characterization techniques including N<sub>2</sub> adsorption/desorption, ICP-OES, HRTEM, XPS, CO-DRIFT and TG were employed to unravel the properties of the catalysts. The experimental results confirmed the importance of Fe as a promotor in PDH. Suitable loading of Fe could obviously improve propane conversion, propylene selectivity, and the anti-coking ability of the catalysts, while excessive Fe caused metal aggregation and promoted side reactions, leading to a decreased propylene selectivity. When Fe loading was 1.0 %, the resulting Pt1.0Fe/ZSM-5 exhibited the best catalytic performance (propane conversion = 47.1 %, and propylene selectivity = 78.9 %), and it also showed good catalytic stability after regeneration. Pt0.5Fe/ZSM-5 showed the lowest coke amount of 0.10 g<sub>c</sub>·g<sub>cat</sub><sup>−1</sup>, and the addition of 0.5 % Fe in Pt/ZSM-5 catalyst decreased 61.5 % of coke deposits.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"572 ","pages":"Article 114768"},"PeriodicalIF":3.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Photocatalytic synthesis of aryltriazenes by CulnS2/K-C3N4 heterojunctions
IF 3.9 2区 化学
Molecular Catalysis Pub Date : 2025-02-01 DOI: 10.1016/j.mcat.2024.114764
Ge Gao , Chuan-Jie Han , Qian-Hui Liu , Li-Ping Mo , Zhan-Hui Zhang
{"title":"Photocatalytic synthesis of aryltriazenes by CulnS2/K-C3N4 heterojunctions","authors":"Ge Gao ,&nbsp;Chuan-Jie Han ,&nbsp;Qian-Hui Liu ,&nbsp;Li-Ping Mo ,&nbsp;Zhan-Hui Zhang","doi":"10.1016/j.mcat.2024.114764","DOIUrl":"10.1016/j.mcat.2024.114764","url":null,"abstract":"<div><div>An efficient protocol for the synthesis of triazenes has been established, utilising a Z-scheme CuInS₂/K-C₃N₄ heterojunction as a photocatalyst in cyclopentyl methyl ether. This method enables the synthesis of a wide range of aryl triazenes with excellent yields and remarkable functional group tolerance, utilizing diazonium salts and secondary amines as substrates. The feasibility and robustness of this approach are further underscored by the CuInS₂/K-C₃N₄ photocatalyst's ability to be recycled and reused multiple times without significant loss of catalytic activity.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"572 ","pages":"Article 114764"},"PeriodicalIF":3.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 tetrameric double peroxyl bonds-bridged Zr-substituted phosphotungstate with good catalytic oxidation activity for sulfides
IF 3.9 2区 化学
Molecular Catalysis Pub Date : 2025-02-01 DOI: 10.1016/j.mcat.2024.114786
Dongsheng Yang , Miao Wang , Lin Sun , Pengtao Ma
{"title":"A tetrameric double peroxyl bonds-bridged Zr-substituted phosphotungstate with good catalytic oxidation activity for sulfides","authors":"Dongsheng Yang ,&nbsp;Miao Wang ,&nbsp;Lin Sun ,&nbsp;Pengtao Ma","doi":"10.1016/j.mcat.2024.114786","DOIUrl":"10.1016/j.mcat.2024.114786","url":null,"abstract":"<div><div>Exploring an effective catalyst to catalytically oxidize sulfides to the corresponding sulfoxides or sulfones is of crucial importance not only for environmental protection, but also for the synthesis of high-value chemicals. Herein, a neoteric tetrameric double peroxyl bonds-bridged Zr-substituted phosphotungstate, K<sub>8</sub>Na<sub>19.5</sub>H<sub>0.5</sub>[Zr<sub>2</sub>(O<sub>2</sub>)<sub>2</sub>(β-PW<sub>10</sub>O<sub>38</sub>)]<sub>4</sub>·68H<sub>2</sub>O (<strong>1</strong>), has been successfully synthesized by a conventional aqueous method. Compound <strong>1</strong> is consisted of four [β-PW<sub>10</sub>O<sub>38</sub>]<sup>11−</sup> subunits, where every two [β-PW<sub>10</sub>O<sub>38</sub>]<sup>11−</sup> subunits are bridged by two Zr<sup>4+</sup> ions via double peroxyl bonds to form a square-shaped structure. Moreover, compound <strong>1</strong> was selected as an effective catalyst for the catalytic oxidation of sulfides to sulfoxides or sulfones owing to the good catalytic property of POMs. As expected, <strong>1</strong> exhibits good performance in catalytic oxidation of sulfides to the responding sulfoxides or sulfones.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"572 ","pages":"Article 114786"},"PeriodicalIF":3.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Silica-supported Pt-In intermetallic alloy for low-temperature reverse water–gas shift reaction
IF 3.9 2区 化学
Molecular Catalysis Pub Date : 2025-02-01 DOI: 10.1016/j.mcat.2025.114890
Jie Zhao, Ruixue Bao, Ruru Sun, Xiaolong Zhang, Tao Zhang, Chuanyi Wang
{"title":"Silica-supported Pt-In intermetallic alloy for low-temperature reverse water–gas shift reaction","authors":"Jie Zhao,&nbsp;Ruixue Bao,&nbsp;Ruru Sun,&nbsp;Xiaolong Zhang,&nbsp;Tao Zhang,&nbsp;Chuanyi Wang","doi":"10.1016/j.mcat.2025.114890","DOIUrl":"10.1016/j.mcat.2025.114890","url":null,"abstract":"<div><div>The reverse water–gas shift reaction (RWGS) has been regarded as an important route for CO<sub>2</sub> utilization. Because the RWGS reaction is a mildly endothermic and competitive reaction with CO<sub>2</sub> methanation, it is necessary to explore catalysts with high activity and selectivity at low reaction temperatures. Herein, we investigate the catalytic characteristic of silica-supported Pt-In alloy for RWGS reaction by comparing it with silica-supported Pt and In<sub>2</sub>O<sub>3</sub>-modified Pt. It is found that Pt-In/SiO<sub>2</sub> exhibits significantly higher activity than Pt/SiO<sub>2</sub> at reaction temperatures from 140 to 200 °C, and equivalent activities appear at 240 °C. Further raising the temperatures, the activity of Pt/SiO<sub>2</sub> increases rapidly. CO selectivity over Pt-In/SiO<sub>2</sub> is close to 100 % and higher than Pt/SiO<sub>2</sub> (∼95 %) under dynamic reaction mode, being attributed to the effective expelling of CO away from the Pt-In surface by CO<sub>2</sub> molecules and the decreased atomic hydrogen supply. Moreover, the formate and the redox pathways were followed over Pt-In/SiO<sub>2</sub> and Pt/SiO<sub>2</sub>, respectively. Except for higher activity and selectivity to CO, In<sub>2</sub>O<sub>3</sub>-modified Pt exhibits the same catalytic pathways as Pt/SiO<sub>2</sub>. The present work supplied a guide to explore efficient catalysts for RWGS reaction at low reaction temperatures.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"574 ","pages":"Article 114890"},"PeriodicalIF":3.9,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143152951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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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