Catalysis Today最新文献

{"title":"Solar photo-Fenton with Fe3+-EDDS and Fe3+-NTA at neutral pH for removal of ibuprofen, diclofenac and their main transformation products in wastewater","authors":"Marina Aliste ,&nbsp;Lixy Olinda León-Morán ,&nbsp;Carmen María Martínez-Escudero ,&nbsp;Isabel Garrido ,&nbsp;Fulgencio Contreras ,&nbsp;Pilar Hellín ,&nbsp;Pilar Flores ,&nbsp;José Fenoll","doi":"10.1016/j.cattod.2024.115139","DOIUrl":"10.1016/j.cattod.2024.115139","url":null,"abstract":"<div><div>In recent years, solar photo-Fenton (SPF) processes have gained interest owing to the use of a cost-free and sustainable radiation source and their effectiveness in removing pharmaceuticals, among other Emerging Pollutants (EPs), from wastewater. Especially, when iron complexes are used to work at neutral pH. The stability and biodegradability characteristics make ethylenediamine-N,N-disuccinic acid (EDDS), and nitrilotriacetic acid (NTA) suitable iron complexing agents. In this work, the removal of diclofenac (DCF) and ibuprofen (IBU), two of the most widely used Non-steroidal Anti-Inflammatory Drug (NSAID) for the treatment of pain, at 200 µg L⁻¹ was studied in wastewater using SPF at natural pH, comparing EDDS and NTA as chelating agents for the first time. The main transformation products (TPs) were also monitored. For this purpose, a suitable analytical method using liquid chromatography coupled to triple quadrupole tandem mass spectrometry (LC-QqQ-MS/MS) with Electro Spray Ionization negative mode (ESI^-) was applied to determine the pharmaceutical EPs and their main TPs in wastewater. Next, they were confirmed by LC-QTOF-HRMS. DCF was degraded 44 % faster with NTA (t_1/2 53 min) than with EDDS (t_1/2 77 min), although the final removal percentages, including photolysis, were similar (90–93 %). In contrast, IBU removal with EDDS (t_1/2 116 min) was twice as fast as with NTA (t_1/2 231 min), whereas photolysis was ineffective. Twenty TPs were monitored, of which only three were detected because of the low concentration used in this study: DCF-2C (<em>m/z</em> 258.0326), DCF-6B (<em>m/z</em> 310.0040), and IBU-4 (<em>m/z</em> 221.1181). Their behaviour followed a formation-elimination profile, but only the complete oxidation of DCF-6 was achieved. This work focuses on the kinetic aspects and TPs formed, which are useful for improving knowledge for the development of efficient processes to abate organic pollutants in real aqueous matrices. Therefore, more EPs should be thoroughly studied to determine the efficiency of EDDS and NTA as iron-chelating agents and the necessity of implementing the SPF process in WWTPs.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"446 ","pages":"Article 115139"},"PeriodicalIF":5.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"WO3/BiVO4 heterojunction photoanodes: Optimized photoelectrochemical performance in relation to both oxides layer thickness","authors":"Annalisa Polo ,&nbsp;Chiara Nomellini ,&nbsp;Gianluigi Marra ,&nbsp;Elena Selli ,&nbsp;Maria Vittoria Dozzi","doi":"10.1016/j.cattod.2024.115137","DOIUrl":"10.1016/j.cattod.2024.115137","url":null,"abstract":"<div><div>An effective strategy to boost the photoelectrochemical (PEC) performance of photoactive materials consists in combining different semiconductors with complementary characteristics, to build type-II heterojunctions. In particular, WO₃/BiVO₄ photoanodes exhibit synergistic effects in the photo-oxidation of water into molecular oxygen, usually overwhelming possible recombination paths at work within the heterojunction. We present here a systematic PEC investigation on composite WO₃/BiVO₄ photoanodes with various WO₃ and BiVO₄ layer thickness (200–800 nm and 40–140 nm, respectively), in comparison with equally thick single WO₃ and BiVO₄ photoanodes, performed under either solar or monochromatic irradiation. We demonstrate that detrimental charge recombination is mainly active under back-side irradiation and is mitigated by minimizing the absorption of both tungsten trioxide and bismuth vanadate layers. Higher photocurrent values are in general attained when the photoanodes are irradiated through the electrolyte/electrode interface, with the best performing photoanodes being composed of <em>ca.</em> 500 nm- and 140 nm-thick WO₃ and BiVO₄ layers, respectively.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"446 ","pages":"Article 115137"},"PeriodicalIF":5.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The peculiar role of copper in the saccharides hydrogenation in aqueous phase","authors":"Federica Zaccheria ,&nbsp;Léa Vilcocq ,&nbsp;Valeria Pappalardo ,&nbsp;Nicola Scotti ,&nbsp;Nicoletta Ravasio","doi":"10.1016/j.cattod.2024.115135","DOIUrl":"10.1016/j.cattod.2024.115135","url":null,"abstract":"<div><div>The paper reports on the use of heterogeneous supported Cu catalysts in the aqueous phase reduction of mono and disaccharides to reduced sugars. The huge availability of the starting materials present also in many side streams of the agri-food industry and the growing interest in polyols not only in the food and pharma sectors but also in the polymer one make this reaction a relevant one in the current scenario. Although less active than Ru and Ni based ones, low loaded Cu catalysts show very interesting performance. Conversions up to 100 % can be reached in the hydrogenation of galactose at 160°C and 40 bar of H₂. Moreover, they allow to directly obtain reduced sugars in the hydrogenation of disaccharides through a one pot bifunctional hydrolysis-hydrogenation process. The high dispersion of the Cu metallic phase and the presence of weak acidic sites on the catalyst surface can give account of the observed activity and selectivity.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"446 ","pages":"Article 115135"},"PeriodicalIF":5.2,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biomimetic methodology as a sustainable tool for enhanced photocatalytic reduction of CO2","authors":"Mufeedah Muringa Kandy,&nbsp;Thasnim P Mohammed,&nbsp;Akhila George,&nbsp;Muniyandi Sankaralingam","doi":"10.1016/j.cattod.2024.115122","DOIUrl":"10.1016/j.cattod.2024.115122","url":null,"abstract":"<div><div>In this current technological world, the unrestrained release of CO₂ negatively impacts the atmosphere by global warming. The capture of CO₂ and converting it into accessible solar fuels is a prominent scientific and technological breakthrough that tackles both the rising climate change and energy crisis issues. The dual beneficial approach focusing on solar-energy-driven reduction of CO₂ to valuable energy fuels is one of the most promising sustainable strategies. In consideration of this, it has been recently observed that biomimetic strategies that incorporate intricate structural design with massive functional components offer a sustainable technological feature. Inspired by the remarkably efficient process of photosynthesis in nature, the fabrication of synthetic leaves for artificial photosynthesis emerges as an attractive avenue that addresses the dual challenges of climate change and energy scarcity with inventive and sustainable methods. This review deals with the fabrication of biomimetic materials with high surface area and efficient charge transfer mechanisms, to improve photocatalytic performance and develop sustainable solutions for CO₂ capture and conversion into solar fuels. The research highlights that the current challenges hinder the advancements of the process from its nascent stage and outlines future research endeavors necessary to elevate it from a rudimentary artificial leaf concept to a commercially viable artificial tree technology with significant industrial value.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"447 ","pages":"Article 115122"},"PeriodicalIF":5.2,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748446","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}

{"title":"Establishing the oxygen evolution reaction pathway on iron-oxy-hydroxide through electro-kinetic study","authors":"Mrinal Kanti Adak,&nbsp;Hirak Kumar Basak,&nbsp;Biswarup Chakraborty","doi":"10.1016/j.cattod.2024.115124","DOIUrl":"10.1016/j.cattod.2024.115124","url":null,"abstract":"<div><div>Electrokinetic analyses harnessing intrinsic reaction parameters of the electrocatalytic oxygen evolution reaction (OER) shed light on the reaction mechanism. Given the superior stability of the iron oxy-hydroxide under alkaline OER conditions, α-FeO(OH) and γ-FeO(OH) are often found to be the active catalyst. Herein, nanocrystalline α-FeO(OH) and γ-FeO(OH) materials are used as catalysts to perform alkaline OER and detailed electrokinetic studies are conducted to establish the reaction pathway. The intrinsic parameters like anodic transfer coefficient (α_a), specific exchange current density (j_0,s), activation energy (<span><math><msubsup><mrow><mi>E</mi></mrow><mrow><mi>a</mi></mrow><mrow><mn>0</mn></mrow></msubsup></math></span>), and reaction order (m) are experimentally determined for both FeO(OH) phases. To obtain these important parameters, OER is performed with α-FeO(OH) and γ-FeO(OH) deposited on nickel foam as anode while varying the cell temperature from 298 K to 343 K and electrolyte concentrations from 0.05 M to 2.0 M KOH. The <em>j</em>_<em>0,s</em> values for α-FeO(OH) and γ-FeO(OH) are almost comparable 2.5 ± 0.5 × 10⁻³ mA cm⁻² highlighting a similar rate of electron transfer. The activation energy barrier for OER on α-FeO(OH) and γ-FeO(OH) is identified to be 9.45 kJ mol⁻¹ and 8.06 kJ mol⁻¹, respectively and the values are manyfold less compared to that observed for previously reported IrO₂ or NiFeO_x materials emphasizing a faster kinetics on the FeO(OH) surface. The first-order reaction is determined from the electrolyte concentration variation suggesting the dissociation of O-H could be the rate-determining step (RDS) which is contrary to the mechanism proposed for IrO₂ or NiFeO_x where the O-O bond formation was found to be rate-limiting. Extracting the intrinsic reaction parameters from the electro-kinetics study, the OER pathway on the FeO(OH) surface has been established here.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"446 ","pages":"Article 115124"},"PeriodicalIF":5.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658823","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}

{"title":"Sulfur-doped carbon/TiO2 composites for ethylene photo-oxidation. Enhanced performance by doping TiO2 phases with sulfur by mobile species inserted on the carbon support","authors":"Lorena T. Pérez-Poyatos,&nbsp;Sergio Morales-Torres,&nbsp;Luisa M. Pastrana-Martínez,&nbsp;Francisco J. Maldonado-Hódar","doi":"10.1016/j.cattod.2024.115115","DOIUrl":"10.1016/j.cattod.2024.115115","url":null,"abstract":"<div><div>The performance of carbon xerogel/TiO₂ composites in ethylene photo-oxidation was analyzed under dynamic conditions considering various parameters, namely sulfur doping, dry <em>vs.</em> humid conditions and type of radiation (ultraviolet, UV, <em>vs.</em> visible light, Vis). The catalysts were synthesized using an acid-catalyzed sol-gel process and characterized with complementary techniques, including SEM/EDX, XRD, XPS and physical adsorption of N₂ and CO₂, among others. The performance of samples in ethylene removal by adsorption and photo-oxidation under dynamic flow was discussed and related with their physicochemical properties and the experimental conditions. Although ethylene adsorption was hindered by doping and humidity, both factors were found to enhance photoactivity by promoting the formation of highly oxidant hydroxyl radicals (HO^•). The composites showed an improved catalytic performance compared to bare TiO₂, with sulfur improving the activity by approximately 8 %. The presence of the carbon material also enhanced the performance under Vis radiation by nearly 25 %. It was suggested that sulfur species could migrate from the carbon support to the TiO₂ nanoparticles during carbonization, forming Ti-O-S bonds. This finding constitutes a novel, cost-effective, sustainable and scalable method for the preparation of supported and doped TiO₂ nanocomposites.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"446 ","pages":"Article 115115"},"PeriodicalIF":5.2,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In situ visualisation of zeolite anisotropic framework flexibility during catalysis","authors":"Mariana V. Rodrigues ,&nbsp;Paloma Vinaches ,&nbsp;Carla C. Polo ,&nbsp;Marlon M. Silva ,&nbsp;Ana F. Suzana ,&nbsp;Wonsuk Cha ,&nbsp;Sibele B. Pergher ,&nbsp;Amélie Rochet ,&nbsp;Florian Meneau","doi":"10.1016/j.cattod.2024.115118","DOIUrl":"10.1016/j.cattod.2024.115118","url":null,"abstract":"<div><div>Zeolites exhibit framework flexibility driving their chemical and catalytic properties. Since the zeolitic pores are extremely small, a slight strain generated in the crystal induces compelling changes in shape, connectivity, accessibility, and the framework chemical properties. These modifications affected the adsorption and desorption of reactants/products and the diffusion within the channels during reaction. Using <em>in situ</em> 3D Bragg coherent X-ray diffraction imaging, we unveil the dynamics of the zeolite structure during catalysis, contraction and/or expansion of its framework also known as zeolite framework flexibility. We imaged three-dimensionally a single faujasite zeolite crystal during the ethanol dehydration reaction revealing anisotropic lattice dynamics simultaneously to guest molecules formation. Understanding zeolite flexibility could permit to tune zeolites properties towards potentially higher adsorption and selectivity.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"446 ","pages":"Article 115118"},"PeriodicalIF":5.2,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658797","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}

{"title":"Tetravalent metals modulated Zn-based layered double hydroxides and their mixed metal oxides for catalytic depolymerization of carbonyl-coordinating plastic waste","authors":"Savita Soni ,&nbsp;Sonika Kumari ,&nbsp;Ajay Sharma ,&nbsp;Shashi Kant Bhatia ,&nbsp;Anil Kumar Sharma","doi":"10.1016/j.cattod.2024.115136","DOIUrl":"10.1016/j.cattod.2024.115136","url":null,"abstract":"<div><div>Plastic waste generation has become a global issue and presents a significant challenge concerning degradability in the environment. This poses a serious threat and adverse impact on the health of living creature and the environment ecosystem. The up-/re-cycling of plastic waste through catalytic depolymerization is becoming a sustainable way to reduce economic concerns about production and serious environmental impacts. Here, in the present study an effort has been made for the development of catalysts for efficient recycling of carbonyl group containing polymer waste [Polyethylene terephthalate (PET) and polycarbonate (PC)]. The sequential preparation of ZnM^IV- and ZnAlM^IV- LDHs (layered double hydroxides) (M^IV= Zr and Ti) and their respective mixed metal oxide (MMOs) based catalytic materials, has been carried out by one-pot co-precipitation and calcination methods. The structural parameters were examined through the various characterisation techniques including XRD, FTIR, TEM, SEM, and EDS. The layered structure, high crystalline nature and hexagonal 2D-sheet/flakes like morphology with average particle size ranging from ∼14–51 nm [for LDHs] and ∼6–21 nm [for MMOs] were observed. Depolymerization of PET and PC using LDHs/MMOs catalyst in ethylene glycols (EG) produced bis(2-hydroxyethyl terephthalate) (BHET) and bisphenol A (BPA) monomers as main products, respectively. The catalyst quantity, concentration of solvent, recyclability of catalysts, reaction duration, and crystallization time have also been further investigated for better yield during catalytic glycolysis. The isolated monomers were further characterized by using melting point, mass spectroscopy, ¹H NMR, ¹³C NMR and FTIR analysis. The order of catalytic activities of prepared samples as ZnTi-LDH˃ ZnAlTi-LDH ˃ ZnTi-MMO˃ ZnAlZr-LDH˃ ZnAlTi-MMO˃ ZnZr-LDH in PET depolymerization while in case of PC, the order as ZnTi-LDH˃ ZnAlTi-LDH ˃ ZnZr-LDH˃ ZnAlZr-LDH˃ ZnZr-MMO˃ ZnAlZr-MMO˃ ZnTi-MMO˃ ZnAlTi-MMO were observed. LDH samples showed higher catalytic conversion than their respective MMOs during PET and PC depolymerization into monomers BHET and BPA with % yield of ∼76–83 % and ∼81–89 %, respectively. ZnTi-LDH shows high catalytic efficacy in depolymerization of PET and PC with yield of (∼82 %) BHET monomer and (89 %) BPA. This catalyst displayed good recyclability more than eight cycles during this catalytic glycolysis study.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"446 ","pages":"Article 115136"},"PeriodicalIF":5.2,"publicationDate":"2024-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658796","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}

{"title":"Pyrocatalytic removal of Cr(VI) by MoS2 nanosheets under controlled thermal fluctuation","authors":"Tanmoy Ghosh ,&nbsp;Imran Khan ,&nbsp;Subhajit Saha","doi":"10.1016/j.cattod.2024.115123","DOIUrl":"10.1016/j.cattod.2024.115123","url":null,"abstract":"<div><div>Traditionally, photocatalysts have been considered as effective tool to combat water pollution caused by Cr(VI) contamination. However, absence of sunlight in night and poor transmittance in the waste water restrict their wide-spread practical applications. Herein, two dimensional MoS₂ nanosheets have been employed as pyrocatalyst for round-o-clock utilization of natural temperature fluctuation and consequent reduction of Cr(VI). MoS₂ pyrocatalysts have been synthesized via facile hydrothermal technique and further characterized by XRD, XPS, SEM technique. The developed pyrocatalyst exhibits ∼95 % removal of 80 ppm Cr(VI) under thermal cycles between 20 ºC and 70 ºC. Moreover, the pyrocatalyst can effectively harness natural temperature variation for the catalytic reduction of Cr(VI) in just 30 days. The excited electrons generated during the temperature variation are identified as active species responsible for Cr(VI) reduction. The results and concept presented here may bring new possibilities for the removal of heavy metal ions in waste water treatment technology.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"446 ","pages":"Article 115123"},"PeriodicalIF":5.2,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658824","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}

{"title":"Isothermal conversion of methane to methanol over Cu-CHA using different oxidants","authors":"Jussara V.R. Vieira,&nbsp;Tassia C.P. Pereira,&nbsp;Carlos H.F. da Cunha,&nbsp;Davi D. Petrolini,&nbsp;Ana C.M. Tello,&nbsp;Alice M. Lima,&nbsp;Yasmin O. Carvalho,&nbsp;André L.R. Garcia,&nbsp;Ernesto A. Urquieta-Gonzalez,&nbsp;João B.O. dos Santos,&nbsp;Patrícia M. Lima,&nbsp;José M.C. Bueno","doi":"10.1016/j.cattod.2024.115121","DOIUrl":"10.1016/j.cattod.2024.115121","url":null,"abstract":"<div><div>Methane oxidation to methanol in cyclic processes using CuO-zeolites has traditionally employed O₂ and N₂O as oxidants. This study explores the use of Cu-CHA zeolite, demonstrating that CO₂ can substitute O₂ in an isothermal reaction at 400 °C, analogous to previous findings using Cu-MAZ. The use of <em>in situ</em> UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS) and density functional theory (DFT) theoretical calculations identified the formation of a binuclear copper hydroxide complex, Z-[CuOH-HOCu]²⁺-Z, on the Cu-CHA. Initial treatment using CO₂ led to marginally superior catalytic activity, compared to the use of O₂ alone, indicating the stability of the Z-[CuOH-HOCu]²⁺-Z complex against self-reduction at 400 °C. In subsequent cycles, activation with O₂ facilitated the oxidation of adsorbed methanol, yielding water and reconstituting the active sites. Conversely, activation with CO₂ led to the partial desorption of methanol, precluding water production and subsequent catalyst regeneration. The findings suggested that both O₂ and CO₂ activations necessitated a post-reaction water extraction step, followed by thermal treatment to replenish the active sites. Importantly, the results indicated that CO₂ could be used as a viable alternative oxidant to O₂ in this catalytic process, potentially enhancing the sustainability of industrial methanol production.</div></div>","PeriodicalId":264,"journal":{"name":"Catalysis Today","volume":"446 ","pages":"Article 115121"},"PeriodicalIF":5.2,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658795","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}