Kryštof Blažek , Pavel Brož , Vít Vykoukal , Lucie Šimoníková , Jiří Sopoušek , Antonín Záděra
{"title":"On the thermal stability and surface and catalytic properties of Cu-Ni nanoparticles","authors":"Kryštof Blažek , Pavel Brož , Vít Vykoukal , Lucie Šimoníková , Jiří Sopoušek , Antonín Záděra","doi":"10.1016/j.mcat.2025.115188","DOIUrl":"10.1016/j.mcat.2025.115188","url":null,"abstract":"<div><div>There is an increased interest in nanoparticle research due to the distinct behaviour of nanoparticles and their compact counterparts with the same chemical composition. The distinct properties include different catalytic activities and phase transformation temperatures. The presented paper deals with the thermal stability and surface and catalytic properties of bimetallic Cu-Ni nanoparticles (NPs). Samples with selected compositions of nanoparticles with a diameter of 8 – 21 nm were prepared via the solvothermal method from copper(II) acetylacetonate and nickel(II) acetylacetonate in an organic solvent mixture of oleylamine and octadec-1-ene. The nanoparticles were characterized by dynamic light scattering (DLS), ultraviolet and visible light spectroscopy (UV-VIS), scanning and transmission electron microscopy (SEM, TEM) equipped with elemental analysis using energy dispersive X-ray spectroscopy (EDX). The elemental composition was characterized by inductively coupled plasma optical emission spectroscopy (ICP-OES). The catalytic properties of the Cu-Ni NPs and the catalytic decomposition of the organic envelope were investigated by Knudsen effusion mass spectrometry (KEMS). Carbon dioxide evolution and creation of decomposition products were observed by mass spectrometry (MS). The optimum efficiency of the catalytic process was observed for Cu-Ni NPs with a copper content of 40-50 %. The thermal stability of the Cu-Ni NPs was monitored using differential scanning calorimetry (DSC) and their melting point depression was evaluated to range from 35.9 to 28.4°C. The results include a description of the processes occurring during the heating of nanoparticles above their melting temperature and during cooling. In addition, new findings were made about the catalytic decomposition of the stabilising organic ligands on the Cu-Ni NPs and the solidus curve of the Cu-Ni phase diagram was determined for Cu-Ni NPs of an average size of 12 nm.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"582 ","pages":"Article 115188"},"PeriodicalIF":3.9,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917730","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":"Recent advances of 9-fluorenone in photoredox catalysis","authors":"Pritesh Khobrekar, Sandesh Bugde","doi":"10.1016/j.mcat.2025.115169","DOIUrl":"10.1016/j.mcat.2025.115169","url":null,"abstract":"<div><div>9-fluorenone has recently become a very effective photoredox catalyst for various chemical transformations. 9-fluorenone is very cheap and readily available, making it promising for versatile photocatalysts compared to transition metal complexes. This review provides a detailed account of synthetic transformations, including rearrangements, oxidations, C–H functionalization, Diels–Alder reactions, acylation, and alkylation, along with the mechanism of representative methodologies based on their general catalytic cycle utilizing 9-fluorenone as a photoredox catalyst. Additionally, the organic transformations discussed in this review align with green chemistry principles, as they avoid heavy metals, minimize waste, use cost-effective reagents, employ environmentally friendly solvents, and facilitate easy oxidation with O₂.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"582 ","pages":"Article 115169"},"PeriodicalIF":3.9,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143917729","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":"Synergistic catalyst Ru/NbOPO4/TiO2 for selective hydrodeoxygenation of phenolics towards unlocking lignin's potential","authors":"Van Minh Dinh , Giacomo Gorza , Ajaikumar Samikannu , Lakhya Jyoti Konwar , Solomon Tesfalidet , Shokat Sarmad , Paolo Canu , Jyri-Pekka Mikkola","doi":"10.1016/j.mcat.2025.115177","DOIUrl":"10.1016/j.mcat.2025.115177","url":null,"abstract":"<div><div>Lignin valorization has attracted significant attention in recent years due to its abundance and potential as a renewable organic carbon resource to produce a variety of value-added chemicals and fuel additives. Catalytic upgrading of lignin faces challenges due to its complex structure and an active catalyst with selective surface properties is needed to break the stable C–O and C–C interunit linkages. In the present work, we developed a series of multifunctional Ru/NbOPO<sub>4</sub>/TiO<sub>2</sub> catalysts with varying surface acidic properties and explored their potential upon hydrogenolysis of lignin model compound eugenol. Textural and surface acidic properties of the prepared materials were studied by means of different techniques such as N<sub>2</sub>-physisorption, NH<sub>3</sub>-TPD, XRD, SEM-EDS, Raman spectra, FT-IR, and TEM. Our catalytic results revealed synergistic role of acid and metal sites upon catalyst performance, whereupon high yields of hydrocarbons (86.9–100 wt.%) were obtained with selective cleavage of the methoxy and hydroxy groups under milder conditions. A kinetic study further identified the reaction mechanism and determined a rate law and partial reaction orders. This research advances the understanding of catalyst design for upgrading of the lignin or lignin monomers into value added chemicals. and on the other hand, contributes to sustainable development by maximizing biomass usage and providing environmentally friendly alternatives in renewable energy.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"582 ","pages":"Article 115177"},"PeriodicalIF":3.9,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922205","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}
Elena V. Tomina , Alena V. Doroshenko , Lyudmila A. Novikova , Ekaterina A. Tyupina , Alexander S. Kamzin , Konstantin V. Zhuzhukin , Andrey V. Kopylov
{"title":"Synthesis, characterization, catalytic activity and adsorption properties of new nanosized cobalt-magnesium spinel ferrites for water treatment processes","authors":"Elena V. Tomina , Alena V. Doroshenko , Lyudmila A. Novikova , Ekaterina A. Tyupina , Alexander S. Kamzin , Konstantin V. Zhuzhukin , Andrey V. Kopylov","doi":"10.1016/j.mcat.2025.115178","DOIUrl":"10.1016/j.mcat.2025.115178","url":null,"abstract":"<div><div>Nitrophenols are carcinogenic, non-biodegradable pollutants in wastewaters from textile, paper and other industries. Cost-effective and environmentally friendly photocatalysts for degradation of such toxicants are magnetic nano-sized spinel ferrites. The research was aimed at establishing the effect of structure and cations distribution in tetrahedral and octahedral sublattices of ferrite spinels on adsorption-catalytic activity of CoFe<sub>2</sub>O<sub>4</sub> (CF), Co<sub>0.5</sub>Mg<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub> (CMF), MgFe<sub>2</sub>O<sub>4</sub> (MF) in photocatalysis and Fenton-like oxidation reactions. Nanosized spinels were synthesized by citrate combustion method and characterized by XRD, Mossbauer spectroscopy, FTIR, SEM, energy dispersive analysis and BET nitrogen adsorption-desorption technique. Oxidative degradation of 2,4-dinitrophenol by hydrogen peroxide was used to evaluate catalytic activity of spinels under differentiation of contributions of sorption, photocatalysis and Fenton-like reactions to overall degradation process. The reaction followed pseudo-first-order kinetic model with degradation efficiency of 79.5 and 98.3 % for CF and MF, respectively. The highest degree of pollutant degradation after four catalysis cycles without regeneration was characteristic of CMF. The observed stability of CF, CMF and MF in several cycles demonstrate their high catalytic potential for treatment of wastewaters containing phenolic compounds. Additionally, the study illustrated the possibility of synthesized spinels application as sorbents of inorganic toxicants from aqueous medium. The sorption capacity for heavy metal ions, activity of sorption sites per unit surface area, efficiency of purification increased in the order CF < CMF < MF allowing to extract from 19 to 58 mg/g of Cu<sup>2+</sup> from water. The investigated materials reached sorption equilibrium within 20-80 min, successfully operated in several sorption cycles both without and under regeneration conditions, and were easily isolated for reuse and regeneration by external magnetic field.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"582 ","pages":"Article 115178"},"PeriodicalIF":3.9,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922211","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}
Shan Lin , Haiyang Xu , Shengjie Wei , Zheng Zhou , Xu Zhang , Xuan Tong , Hangyu Zhou , Xiaodong Ma , Xu Ji , Yue Yang , Le Zhang
{"title":"Room-temperature co-precipitation of nickel phosphate-coated Zn0.4Cd0.6S nanorods for enhanced photocatalytic H₂ evolution in water splitting","authors":"Shan Lin , Haiyang Xu , Shengjie Wei , Zheng Zhou , Xu Zhang , Xuan Tong , Hangyu Zhou , Xiaodong Ma , Xu Ji , Yue Yang , Le Zhang","doi":"10.1016/j.mcat.2025.115199","DOIUrl":"10.1016/j.mcat.2025.115199","url":null,"abstract":"<div><div>To enhance the hydrogen production performance and photo-corrosion resistance of ZnS and CdS based photocatalysts without relying on noble metals such as platinum, ruthenium, or gold, this study optimizes the molar ratio between Cd and Zn in Zn<sub>x</sub>Cd<sub>1-x</sub>S solid solutions. The resulting Zn<sub>0.4</sub>Cd<sub>0.6</sub>S nanorod-shaped solid solutions exhibit superior visible-light photocatalytic activity. A non-precious metal Ni<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> nano-thin layer is uniformly deposited onto the surface of the Zn<sub>0.4</sub>Cd<sub>0.6</sub>S solid solution via a room-temperature chemical co-precipitation method. This modification not only prevents oxidative photo-corrosion but also facilitates the oxidation and reduction of water during the photocatalytic surface process, significantly enhancing both the stability and hydrogen production performance of the composite catalyst. Experimental results demonstrate that the performance improvement of Zn<sub>0.4</sub>Cd<sub>0.6</sub>S by the Ni<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> cocatalyst is markedly greater than that achieved with the traditional Pt cocatalyst. The maximum hydrogen production rate of the composite catalyst reaches 119.72 mmol·g⁻¹·h⁻¹, with an accumulated hydrogen production of 340.33 mmol·g⁻¹ after 3 hours. After 25 hours of photocatalytic cycling experiments, the hydrogen production rate remains at 95.95 mmol·g⁻¹·h⁻¹, approximately 80.14 % of the initial rate. The apparent quantum yield of Z4C6S-5NPO attains 61.8 %, with high value in ZnCdS-based photocatalysts. These results are promising and offer valuable insights for the development of low-cost, highly stable, and efficient composite photocatalysts.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"582 ","pages":"Article 115199"},"PeriodicalIF":3.9,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912292","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":"A combined DFT-Experimental study on FSP-made Ru/Ti-SiO2 catalysts for CO2 methanation","authors":"Okorn Mekasuwandumrong , Tinnakorn Saelee , Jakapob Noppakhun , Meena Rittiruam , Patcharaporn Khajondetchairit , Damien P. Debecker , Supareak Praserthdam , Piyasan Praserthdam","doi":"10.1016/j.mcat.2025.115179","DOIUrl":"10.1016/j.mcat.2025.115179","url":null,"abstract":"<div><div>Flame spray pyrolysis (FSP) was employed to synthesize Ti-modified SiO₂ in a single step, serving as the support for Ru-based catalysts in CO₂ methanation reactions. The addition of Ti led to the formation of anatase and rutile TiO₂ phases, enhancing the catalytic activity of Ru/Ti-SiO₂ catalysts. Benchmarking between Ru/Ti-SiO₂ catalysts of various Ti concentrations prepared using one-step FSP techniques indicated significantly higher catalytic activity for the impregnation-made catalysts compared to the FSP-made ones, where diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) revealed different CH₄ formation mechanisms between two techniques. For FSP-made catalysts, it predominantly occurred through the CO route, whereas the impregnation-made proceed via both the dissociative adsorption of CO₂ (CO route) and through surface formate species formation. To explain the effect of Ti loading on Ru/SiO₂ catalysts, a multiscale analysis combining density functional theory (DFT) and microkinetic modeling was performed to study the adsorption behavior of CO₂ on different catalysts. The results revealed that a high amount of Ti reduced the adsorption strength of CO₂ on Ru/SiO₂ catalysts, indicating a modified interaction between CO₂ and the catalyst surface.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"582 ","pages":"Article 115179"},"PeriodicalIF":3.9,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904092","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}
Ruoxin Li , Jiuhong Wei , Jun Liu , Bin Jia , Jiaxuan Liu , Ying Wang , Yuqiong Zhao , Guoqiang Li , Guojie Zhang
{"title":"A review of methods and strategies for NO and CO pollutant removal from flue gas using copper-based catalysts: Mechanisms and performance","authors":"Ruoxin Li , Jiuhong Wei , Jun Liu , Bin Jia , Jiaxuan Liu , Ying Wang , Yuqiong Zhao , Guoqiang Li , Guojie Zhang","doi":"10.1016/j.mcat.2025.115174","DOIUrl":"10.1016/j.mcat.2025.115174","url":null,"abstract":"<div><div>With the rapid acceleration of industrialization, the emission of nitrogen oxides (NO<sub>x</sub>) and carbon monoxide (CO) has emerged as a pressing global environmental issue, posing significant threats to ecosystems and human health. Copper-based catalysts have garnered substantial attention in the field of multi-pollutant synergistic treatment due to their abundant availability, low cost, and superior catalytic performance. This paper provides a comprehensive review of the recent advancements in copper-based catalysts for the removal of NO<sub>x</sub> and CO from flue gas, with a focus on their applications in selective catalytic reduction (SCR), CO catalytic oxidation, and bifunctional co-catalysis. Through an in-depth analysis of key factors influencing catalytic performance—such as valence modulation, morphological structure design, optimization of preparation methods, auxiliary doping, and adjustment of metal ratios—the critical roles of various catalyst properties are elucidated. These include redox capabilities, acidic nature, surface oxygen vacancy concentration, and active site dispersion in the catalytic process. Furthermore, this paper explores in detail the reaction mechanisms and sulfur-resistant properties of copper-based catalysts employed in several strategies for NO<sub>x</sub> and CO removal, highlighting the potential of bifunctional catalysts for simultaneous NO<sub>x</sub> and CO abatement. Significant progress has been achieved in enhancing low-temperature activity and stability through the optimization of preparation processes, intermetallic interactions, and structural design of copper-based catalysts. These advancements provide crucial theoretical insights and practical guidance for the development of future environmental treatment technologies, paving the way for more efficient and sustainable solutions to address global pollution challenges.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"582 ","pages":"Article 115174"},"PeriodicalIF":3.9,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904093","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}
Liang Li , Jiamin Liang , Jinwei Zhu , Yongxiang Zhao , Hao Wang
{"title":"Advances in the preparation and application of nanoconfined metal catalysts composed of porous materials","authors":"Liang Li , Jiamin Liang , Jinwei Zhu , Yongxiang Zhao , Hao Wang","doi":"10.1016/j.mcat.2025.115175","DOIUrl":"10.1016/j.mcat.2025.115175","url":null,"abstract":"<div><div>Nanoconfinement catalysis is becoming a research hotspot in the field of catalytic reactions due to its potential to enhance catalytic performance. Porous nanoconfined catalysts are designed by dispersing nanoparticles of active metal into porous support through various synthesis methods. This kind of catalyst can utilize the confinement effect of the pores to precisely regulate the dispersion and particle size of the metal particles, and then improve their catalytic activity and stability. During the process of catalytic reaction, the confinement effect of the pores in porous materials can effectively optimize the electronic states of the metal active components. Furthermore, the shape-selectivity of the pore channels can significantly improve the selectivity of the reaction products. This paper provides a comprehensive review of recent synthesized strategies for pore-confined metal nano-catalysts and their catalytic applications, and then delves into the mechanism by which the pore-confinement effect enhances catalytic activity, product selectivity, and the stability of catalysts. Specifically, the discussion is focused on various synthesis methods for pore-confined catalysts, including in situ encapsulated, core-shell structured, two-dimensional layered, and single-atom anchored catalysts, as well as recent advances of these catalysts in different catalytic reactions. Finally, the future prospect is proposed in order to provide a guidance for the development and application of pore-confined catalysts in catalytic reaction.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"582 ","pages":"Article 115175"},"PeriodicalIF":3.9,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898736","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}
Ziqi Tang , Yuanjie Bao , Zhangqian Wei , Shenggang Li
{"title":"A DFT study on the active surfaces of the ZnGa2O4 spinel catalyst for CO2 hydrogenation to methanol","authors":"Ziqi Tang , Yuanjie Bao , Zhangqian Wei , Shenggang Li","doi":"10.1016/j.mcat.2025.115166","DOIUrl":"10.1016/j.mcat.2025.115166","url":null,"abstract":"<div><div>In this work, we constructed the low Miller index surfaces of (100), (001), (111), and (110) of the ZnGa<sub>2</sub>O<sub>4</sub> spinel catalyst. Through extensive DFT calculations, we found that the oxygen vacancy (V<sub>O</sub>) formation energies on the (100) and (001) surfaces were <1.0 eV, whereas those on the (111) and (110) surfaces were >3.0 eV. We further examined the dissociation of molecular hydrogen (H<sub>2</sub>) on these surfaces, and found that H<sub>2</sub> homolytic dissociation tended to occur on surfaces with lower V<sub>O</sub> formation energies, while H<sub>2</sub> heterolytic dissociation were favored on those with higher V<sub>O</sub> formation energies. CO<sub>2</sub> adsorption and activation on the different surfaces of the ZnGa<sub>2</sub>O<sub>4</sub> spinel catalyst were investigated, and on surfaces with lower V<sub>O</sub> formation energies, CO<sub>2</sub> adsorbs in a linear configuration (ln-CO<sub>2</sub>*), while on surfaces with higher V<sub>O</sub> formation energies, CO<sub>2</sub> adopts in a bent adsorption geometry (bt-CO<sub>2</sub>*) and is easier to dissociate. For HCOO formation from ln-CO<sub>2</sub>* + H*, the (110) surface has the lowest energy barrier, so it is likely the most active surface for CO<sub>2</sub> hydrogenation to methanol (CH<sub>3</sub>OH). Thus, we compared the CH<sub>3</sub>OH formation pathway on the ZnGa<sub>2</sub>O<sub>4</sub>(110) surface with the pathways for direct and indirect CO<sub>2</sub> dissociation, and predicted it to favor CH<sub>3</sub>OH production. Our calculations reveal the active surfaces of the ZnGa<sub>2</sub>O<sub>4</sub> spinel catalyst for CO<sub>2</sub> hydrogenation to CH<sub>3</sub>OH, and provide insights into the experimentally observed high CH<sub>3</sub>OH selectivity, which should be important for the rational design of Zn-based spinel catalysts for this reaction.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"582 ","pages":"Article 115166"},"PeriodicalIF":3.9,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898719","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":"Spray drying synthesis of stable Cu catalyst supported on carbon with high C2 product selectivity in CO2 electrolysis","authors":"Lili Yang, Jinghao Lu, Chao Wang, Lianying Zhang, Chuanhui Zhang, Xingyun Li, Hongliang Li, Xiu Song Zhao","doi":"10.1016/j.mcat.2025.115162","DOIUrl":"10.1016/j.mcat.2025.115162","url":null,"abstract":"<div><div>Electrocatalytic carbon dioxide (CO<sub>2</sub>) reduction is an appealing option that offers advantages of converting greenhouse gas CO<sub>2</sub> into value-added hydrocarbon products while storing green energy. Copper (Cu) is a unique catalyst that has adequate ability for adsorption and activation of CO<sub>2</sub>, as well as important intermediate species for forming multi-carbon (C<sub>2+</sub>) products. In particular, monovalent Cu(I) is deemed to be responsible for C-C coupling to form C<sub>2+</sub> products. However, oxidation state copper species are unstable under the CO<sub>2</sub> electrolysis conditions, tending to be reduced along with surface reconstruction. It is therefore important to develop a robust catalyst synthesis method to enhance the stability of Cu-based catalysts. Here, we demonstrate a spray-drying method for the synthesis of carbon-supported Cu catalysts for the electrocatalytic CO<sub>2</sub> reduction reaction. This method is scalable and cost-effective, allowing one to realize mass production of carbon-supported Cu catalysts. A catalyst sample thus synthesized exhibits a Faraday efficiency of C<sub>2</sub> products (e.g., ethylene, ethanol and acetic acid) as high as 85.8 %. <em>In-situ</em> attenuated total reflection-surface-enhanced infrared absorption spectroscopy and surface-enhanced Raman spectroscopy characterization results reveal that the porous carbon support stabilizes Cu<sub>2</sub>O/CuO nanoparticles, facilitate CO<sub>2</sub> adsorption, enrich local important intermediates for the C-C coupling reaction.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"582 ","pages":"Article 115162"},"PeriodicalIF":3.9,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898745","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}