LangmuirPub Date : 2026-10-20Epub Date: 2026-10-06DOI: 10.1021/acs.langmuir.6c03705
Min Xu, Lu Xia, Zhayun Gong, Yin Qiao, Hefeng Xu, YuJie Liu, Pei Huang, Xun Wang, Xiaodong Chu
{"title":"Magnetically Recyclable Fe3O4/Au Nanocomposites for Efficient Degradation of Organic Dyes via Tribocatalysis","authors":"Min Xu, Lu Xia, Zhayun Gong, Yin Qiao, Hefeng Xu, YuJie Liu, Pei Huang, Xun Wang, Xiaodong Chu","doi":"10.1021/acs.langmuir.6c03705","DOIUrl":"10.1021/acs.langmuir.6c03705","url":null,"abstract":"<p>Tribocatalysis,which converts mechanical energy into chemicalenergy, offers a green route for water treatment, yet efficient, recoverable,and durable tribocatalysts remain scarce. Herein, a magnetic Fe<sub>3</sub>O<sub>4</sub>/Au nanocomposite was developed for organic dyedegradation. Although Fe<sub>3</sub>O<sub>4</sub>/Au has been widelystudied in photocatalysis and Fenton-like systems, its tribocatalyticapplication is largely unexplored. The composite was synthesized bya solvothermal method using polyethylenimine as a scaffold, followedby grafting dithiocarbamate and self-assembling AuNPs (5–20nm) onto Fe<sub>3</sub>O<sub>4</sub> hollow microspheres (∼200nm). Characterization (XRD, TEM, SEM, XPS, BET, VSM) confirmed a stableheterostructure with mesoporous features (21.3 m<sup>2</sup>/g) andstrong superparamagnetism (66.84 emu/g), enabling magnetic recoverywithin 15 s. XPS revealed a +0.07 eV shift of Fe 2p<sub>3/2</sub> uponAu loading, evidencing interfacial electron transfer from Fe<sub>3</sub>O<sub>4</sub> to Au and formation of a Schottky barrier that promotescharge separation. Under optimized stirring (500 rpm, 5 h), Fe<sub>3</sub>O<sub>4</sub>/Au achieved 100% degradation of (RhB) (5 mg/L,50 mL) with a rate constant of 0.7751 h<sup>–1</sup>, outperformingpure Fe<sub>3</sub>O<sub>4</sub> and AuNPs. The near-neutral pH condition(pH ≈ 7) was found to be optimal for the tribocatalytic performance.Radical scavenger and EPR experiments identified <sup>•</sup>OH as the primary active species and <sup>•</sup>O<sub>2</sub><sup>–</sup> as secondary. TOC analysis showed 71% mineralization.The catalyst retained 97.47% efficiency after five cycles with negligibleFe (<0.006 ppm) and Au (<0.001 ppm) leaching, and preservedmorphology. RhB degraded faster than Methylene Blue, Crystal Violet,Acid Orange 7, and Methyl Orange, correlating with molecular bondstrengths. This work demonstrates a novel mechanical-to-chemical energyconversion pathway for sustainable water treatment.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"42 41","pages":"30699–30717"},"PeriodicalIF":4.4,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149092480","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":"Synthesis of Calcium Sulfate Nanocrystals via Confined Reaction in Ion-Enriched Instantaneous Microdomains","authors":"Ruokai Liu, Zhu Shu, Borui Zhang, Junqing Zhang, Qiang Xue, Jun Zhou","doi":"10.1021/acs.langmuir.6c04529","DOIUrl":"10.1021/acs.langmuir.6c04529","url":null,"abstract":"<p>Hemihydrate calcium sulfate nanocrystals hold promisingpotentialin biomedical and industrial applications. Conventional synthesismethods typically necessitate high temperatures/pressures, acidic/alkalinemedia, or expensive organic reagents. This study proposes a facileapproach: when dripping CuSO<sub>4</sub> aqueous solution into CaCl<sub>2</sub> ethanol solution, driven by SO<sub>4</sub><sup>2–</sup>, CuSO<sub>4</sub> droplets are immediately transformed into numerousSO<sub>4</sub><sup>2–</sup>-enriched instantaneous microdomains,where Ca<sup>2+</sup> and SO<sub>4</sub><sup>2–</sup> undergoa confined reaction and aggregate into calcium sulfate crystals, whileethanol suppresses crystal growth, thereby yielding hemihydrate calciumsulfate nanocrystals. Under optimized conditions, the prepared pure-phasecalcium sulfate crystals belong to the α-hemihydrate phase andthe trigonal space group <em>P</em>3<sub>2</sub>21, havingdiameters of 30–80 nm and lengths of 100–350 nm. Theprocess enables the cost-effective and environmentally friendly preparationof calcium sulfate nanocrystals under mild ambient conditions withoutacid or base, while allowing ethanol recycling and CuCl<sub>2</sub> byproduct recovery.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"42 41","pages":"30976–30987"},"PeriodicalIF":4.4,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149150932","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}
LangmuirPub Date : 2026-10-20Epub Date: 2026-10-12DOI: 10.1021/acs.langmuir.6c03858
Xiaohuan Dai, Siqi Yang, Renhong Liang, Shanming Ke
{"title":"Unveiling the Mica-Interlayer-Mediated Exfoliation of β-Ga2O3 Thin Films","authors":"Xiaohuan Dai, Siqi Yang, Renhong Liang, Shanming Ke","doi":"10.1021/acs.langmuir.6c03858","DOIUrl":"10.1021/acs.langmuir.6c03858","url":null,"abstract":"<p>Mechanicallyexfoliable oxide membranes on mica are promising forflexible optoelectronics, but the actual fracture pathway during oxide/micadelamination remains unclear. Here, β-Ga<sub>2</sub>O<sub>3</sub> thin films were epitaxially grown on mica by pulsed laser deposition,and their tape-assisted exfoliation behavior was investigated. Althoughthe films could be transferred onto adhesive supports, mica-relatedresidues were repeatedly detected on the backside of the exfoliatedβ-Ga<sub>2</sub>O<sub>3</sub> films. Combined XRD, SEM/EDS line-scan,XPS, and rocking-curve results show that exfoliation does not occurthrough clean separation at the β-Ga<sub>2</sub>O<sub>3</sub>/mica interface, but instead involves cleavage within the mica substrate.First-principles calculations show that the β-Ga<sub>2</sub>O<sub>3</sub>/mica adhesion energy reaches 40.6 meV Å<sup>–2</sup>, approximately 40% higher than the mica interlayer cleavage energyof 28.9 meV Å<sup>–2</sup>, supporting the preferentialmica-interlayer fracture pathway. Energy decomposition further revealsthat the DFT-D3 dispersion term accounts for 46.5% of the calculatedβ-Ga<sub>2</sub>O<sub>3</sub>/mica work of separation, challengingthe simplified assumption of a purely vdW-bonded oxide/mica interface.This work identifies a mica-interlayer-mediated exfoliation mechanismand provides guidance for controlled transfer and interfacial cleanlinessof flexible β-Ga<sub>2</sub>O<sub>3</sub> membranes.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"42 41","pages":"30753–30760"},"PeriodicalIF":4.4,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149152104","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}
LangmuirPub Date : 2026-10-20DOI: 10.1021/acs.langmuir.6c02499
Yifei Wang,Haotian Deng,Haojie Bai,Jiayi Zhao,Jun Hu
{"title":"Multiscale Surface Topography of Hydrophilic Scallop Shells Is Associated with the Retention of Culturable Bacteria under Static and Dynamic Conditions","authors":"Yifei Wang,Haotian Deng,Haojie Bai,Jiayi Zhao,Jun Hu","doi":"10.1021/acs.langmuir.6c02499","DOIUrl":"https://doi.org/10.1021/acs.langmuir.6c02499","url":null,"abstract":"When droplets carrying bacteria land on the medical device’s surface, they can cause contamination and promote biofilm formation. This study examined the impact behavior of droplets on five natural shell surfaces with varying hydrophilicity and surface texture, aiming to screen for surfaces that are both noncytotoxic and resistant to bacterial adhesion. Among these surfaces, the scallop surface exhibited the strongest resistance to bacterial adhesion and supported short-term BMSC attachment and viability, while the Babylonia shell surface showed the highest bacterial attachment. Notably, the most significant difference in antiadhesion performance between the scallop and the Babylonia shell occurred at low impact energy (We ≈ 16), where droplets neither rebounded nor splashed, yet the macro- and microscale structures on the scallop surface had already begun to interact effectively with the droplets. At higher Weber numbers, droplet impact dynamics may further enhance this resistance by generating local pressure gradients and shear forces, which may reduce bacterial retention on the surface, thereby amplifying the antiadhesion effect. Therefore, the superior antiadhesion of the scallop surface is associated with the synergistic action of its topography and droplet dynamics: its sharp nanoscale protrusions and high roughness may provide a foundational antiadhesion effect, while droplet impact dynamics may further amplify this effect. Notably, the scallop surface is not the most resistant in the nonimpact control, but performs best under dynamic impact, consistent with its topographical features being particularly responsive to hydrodynamic forces.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"71 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149221733","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":"Design Principles for Oxygen-Tolerant Surface-Initiated Photoinduced Atom Transfer Radical Polymerization toward Thick Polymer Brushes","authors":"Tsukuru Masuda,Kazuya Sakaguchi,Ryota Nomura,Soma Uematsu,Rikima Kuwada,Takamasa Sakai","doi":"10.1021/acs.langmuir.6c05088","DOIUrl":"https://doi.org/10.1021/acs.langmuir.6c05088","url":null,"abstract":"Polymer brushes are one of the most promising surface modification strategies, owing to their well-defined interfacial architecture. With recent advances in oxygen-tolerant atom transfer radical polymerization (ATRP), visible-light-driven photoATRP with dual photoredox/copper catalysis is particularly versatile. However, translating oxygen-tolerant ATRP from solution-phase polymerization to surface-initiated polymerization is not straightforward because polymer brush growth is governed by both solution-phase kinetics and surface-specific processes. In this study, we report design principles for oxygen-tolerant SI-photoATRP by systematically correlating surface-initiated polymer brush growth with solution-phase polymerization using eosin Y (EY)-mediated dual photoredox/copper catalysis as a model system. The initial concentration of the free initiator was found to be a key factor governing surface growth efficiency. The kinetic analysis performed at representative initiator concentrations further clarified the relationship between the surface-initiated polymer brush growth and solution-phase polymerization. An iterative SI-photoATRP process successfully facilitated the growth of thick polymer brushes with a maximum dry film thickness of 438 nm, without deoxygenation. The interfacial properties in the thick polymer brushes were also tunable according to the molecular design, as demonstrated by contact angle measurements. These findings provide a practical framework for the rational design of polymer interfaces via SI-photoATRP under oxygen-tolerant conditions.","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"34 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149221734","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}
LangmuirPub Date : 2026-10-20Epub Date: 2026-10-05DOI: 10.1021/acs.langmuir.6c02358
Yuan Zhao, Jiantao Li, Jiang-Bo Huo, Ying Liu
{"title":"Simultaneous Removal of Cu2+/Cd2+ by Sulfidized nZVI/MXene Composites: Experimental and DFT Studies","authors":"Yuan Zhao, Jiantao Li, Jiang-Bo Huo, Ying Liu","doi":"10.1021/acs.langmuir.6c02358","DOIUrl":"10.1021/acs.langmuir.6c02358","url":null,"abstract":"<p>Thecopresence of copper (Cu<sup>2+</sup>) and cadmium (Cd<sup>2+</sup>) in water poses a serious threat to aquatic ecosystems dueto their combined toxicity, persistence, and potential for bioaccumulation.Because of the hazardous effects of both ions, the simultaneous removalof Cu<sup>2+</sup> and Cd<sup>2+</sup> in aquatic environments isof great significance. Herein, novel sulfide-modified nanozerovalentiron (S-nZVI)/MXene composites were prepared by in situ embeddingS-nZVI nanoparticles into an MXene lamellar structure. Different characteristictechniques such as SEM, HRTEM, XRD, FTIR, XPS, and BET suggest thatS-nZVI was evenly anchored to the MXene layers, effectively mitigatingtheir clustering. Nitrogen adsorption-desorption showed that the specificsurface area of S-nZVI@MXene was approximately 29.77 m<sup>2</sup>/g, which is 1.64 times more than that of MXene (17.84 m<sup>2</sup>/g). Batch experiments demonstrated that S-nZVI@MXene exhibits excellentremoval efficiency for Cu<sup>2+</sup> and Cd<sup>2+</sup> in a binarysolution. At pH = 5.4, the maximum adsorption capacities of S-nZVI@MXenefor Cu<sup>2+</sup> and Cd<sup>2+</sup> were 67.85 and 56.33 mg/g,respectively. The pseudo-second-order kinetic model and Langmuir isothermmodel were more suitable for describing the adsorption, implying thenature of single-layer chemical adsorption. Results of experimentaland density functional theory (DFT) calculations jointly indicatedion-exchange reactions and surface complication. After three reuses,S-nZVI@MXene maintained removal efficiencies of 97.8% and 62.54% forCu<sup>2+</sup> and Cd<sup>2+</sup>, respectively. S-nZVI@MXene showsgreat potential as an adsorbent for simultaneously removing Cu<sup>2+</sup> and Cd<sup>2+</sup> from wastewater.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"42 41","pages":"30545–30560"},"PeriodicalIF":4.4,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091848","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":"Hierarchically Porous Fe–N–C Electrocatalysts with Accessible Fe-Nx Sites for High-Performance Oxygen Reduction Reaction in Zn-Air Batteries","authors":"Yankun Wei, Dan Wang, Jinxiang Chou, Ruopeng Li, Wenchang Wang, Naotoshi Mitsuzaki, Zhidong Chen","doi":"10.1021/acs.langmuir.6c04394","DOIUrl":"10.1021/acs.langmuir.6c04394","url":null,"abstract":"<p>DevelopingFe–N–C electrocatalysts with high activesite utilization remains a key challenge for the oxygen reductionreaction (ORR), primarily because of the limited accessibility ofFe-Nx sites. Herein, a hierarchically porous Fe–N–C(HP-Fe–N–C) catalyst is constructed via a ZnO-templatedstrategy combined with urea-assisted secondary pyrolysis, enablingthe simultaneous regulation of the pore structure and Fe-Nx site density.The ZnO template governs the formation of mesoporous architectures,and concurrently, the pyrolysis of urea releases gaseous species thatfacilitate the enlargement and interconnection of mesoporous channels.Notably, the balanced micromesoporous structure derived from the ZnOtemplate facilitates efficient mass transport and enhances site accessibility,while urea regulates the nitrogen species to promote the formationof dense Fe-Nx moieties. As a result, the HP-Fe–N–Ccatalyst delivers a high half-wave potential of 0.90 V, along withnear four-electron selectivity and excellent durability. The Zn-airbattery assembled with the HP-Fe–N–C cathode achievesan open-circuit voltage of 1.52 V, a specific capacity of 745.6 mAhg<sup>–1</sup>, and favorable charge–discharge stabilityexceeding 800 h. This work reveals the balance between hierarchicalporosity and active site density in the Fe–N–C catalystfor the high-performance ORR.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"42 41","pages":"30932–30941"},"PeriodicalIF":4.4,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091894","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}
LangmuirPub Date : 2026-10-20Epub Date: 2026-10-05DOI: 10.1021/acs.langmuir.6c05162
Sandesh S. Uttarwar, Hyogyun Roh, Francois Nkurunziza, Aradhana Singh, Joshua M. Spurgeon
{"title":"Microstructure-Wettability Relationships on Arrays of Electrodeposited Re-entrant Copper Micromushrooms","authors":"Sandesh S. Uttarwar, Hyogyun Roh, Francois Nkurunziza, Aradhana Singh, Joshua M. Spurgeon","doi":"10.1021/acs.langmuir.6c05162","DOIUrl":"10.1021/acs.langmuir.6c05162","url":null,"abstract":"<p>Omniphobic antiwetting surfaces could play an essentialrole inenhancing performance in certain nonaqueous electrochemical systems,and a possible route to achieve durable repellency is the scalablefabrication of metallic re-entrant microstructures. This study systematicallyinvestigates the microstructure-wettability relationships of arraysof electrodeposited copper micromushrooms. Singly and doubly re-entrantarchitectures were fabricated using a combination of photolithographyand electrodeposition. The impact of geometric parameters, includingpillar diameter, center-to-center spacing, and overhang width, onthe measured contact angle was evaluated across a range of solventswith varying surface tensions. An optimized singly re-entrant geometrymaximized contact angle for high- and intermediate-surface-tensionliquids but failed to prevent the wetting of low-surface-tension solventslike methanol. Synergistic effects were observed when combining thesemicrostructures with perfluoroalkyltrichlorosilane coatings, whichsignificantly reduced surface energy and enabled repellency for evenlow-surface-tension fluids. While doubly re-entrant structures weresuccessfully fabricated, their rounded cap morphology limited additionalantiwetting benefits compared to singly re-entrant designs. Thesefindings provide design guidelines for developing robust, scalable,and conductive antiwetting surfaces suitable for gas diffusion electrodesand other electrochemical applications.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"42 41","pages":"31117–31129"},"PeriodicalIF":4.4,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091900","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}
LangmuirPub Date : 2026-10-20Epub Date: 2026-10-05DOI: 10.1021/acs.langmuir.6c03737
Yifeng Gao, Yafei Hu, Yi Ge, Yibo Li, Qi-An Huang, Cécile A. Dreiss, Zonglin Chu
{"title":"Pickering Emulsions with Long-Term Stability from Ultrafine Amphiphilic Benzyl-Modified Silica Nanoparticles","authors":"Yifeng Gao, Yafei Hu, Yi Ge, Yibo Li, Qi-An Huang, Cécile A. Dreiss, Zonglin Chu","doi":"10.1021/acs.langmuir.6c03737","DOIUrl":"10.1021/acs.langmuir.6c03737","url":null,"abstract":"<p>Pickeringemulsions offer superior stability and eco-friendlypropertiesacross multiple industries due to solid particle stabilization atoil–water interfaces. However, the design and synthesis ofultrafine nanoparticles capable of stabilizing Pickering emulsionshave always been a challenging problem. Herein, ultrafine silica nanoparticleswhich have a diameter of 20–30 nm, were prepared based on amicroemulsion method. The ultrafine silica nanoparticles have excellentdispersion properties in water. The benzyl-modified amphiphilic silicananoparticles were synthesized by grafting benzyl groups onto thenanoparticle surface using the Pickering emulsion template methodafter modification with 3-[2-(2-aminoethylamino)ethylamino]propyl-trimethoxysilane.The benzyl-modified silica nanoparticles have excellent interfacialactivity, with a three-phase contact angle close to 90°, andcan reduce the interfacial tension of the kerosene/water system. Theresulting Pickering emulsions stabilized by benzyl-modified silicananoparticles have excellent long-term stability (stable for at least200 days). Additionally, benzyl-modified silica nanoparticles canalso be used as Pickering emulsifiers for soybean oil, sunflower oil, <em>n</em>-hexadecane, and mineral oil, and they exhibit potentialapplication scenarios in fields such as the food and cosmetics industry,catalytic synthesis, and sustained drug release.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"42 41","pages":"30743–30752"},"PeriodicalIF":4.4,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149091901","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}
LangmuirPub Date : 2026-10-20Epub Date: 2026-10-06DOI: 10.1021/acs.langmuir.6c04281
Yang-Wen Wu, Xiong Zhang, Song Xu, Xu Su, Han-Wen Wang, Xin-Yue Zhou, Bing Zhang, Li Zhao, Qiang Lu
{"title":"Mechanistic Insights into Alkaline Electrosynthesis of Acetamide over Transition Metal-Doped MoS2: A Comprehensive DFT Investigation","authors":"Yang-Wen Wu, Xiong Zhang, Song Xu, Xu Su, Han-Wen Wang, Xin-Yue Zhou, Bing Zhang, Li Zhao, Qiang Lu","doi":"10.1021/acs.langmuir.6c04281","DOIUrl":"10.1021/acs.langmuir.6c04281","url":null,"abstract":"<p>The electrosynthesis of acetamide in alkaline conditionsvia thecoupling reduction of NO and CO<sub>2</sub> establishes a sustainable,efficient platform that enables simultaneous valorization of majoratmospheric pollutant and primary greenhouse gas. However, limitedcatalytic activity and an unclear reaction mechanism in alkaline mediaremain critical challenges. Herein, in this study density functionaltheory (DFT) calculations systematically investigate a series of transitionmetal (TM) doped MoS<sub>2</sub> catalysts to elucidate the mechanismof acetamide electrosynthesis. Among the fourth-period TM dopants,Ni–MoS<sub>2</sub> exhibits the highest catalytic activity.Electronic structure analysis shows that Ni doping increases interfacialelectron density and promotes surface reactivity. Ni–MoS<sub>2</sub> exhibits strong synergistic adsorption of NO (−0.44eV) and CO<sub>2</sub> (−0.58 eV), accompanied by enhancedorbital hybridization and interfacial bonding interactions. Reactionpathway analysis reveals that Ni–MoS<sub>2</sub> facilitatesthe efficient formation of key intermediates (NH<sub>2</sub>OH andCH<sub>3</sub>CHO), shortens the overall reaction pathway, and suppressescompeting side reactions, thereby improving both activity and selectivity.These intermediates subsequently undergo thermodynamically favorableC–N coupling on the Ni–MoS<sub>2</sub> surface, enablingefficient acetamide production with a limiting potential of −1.23V. Overall, this work reveals a mechanistic relationship between theelectronic properties of active sites, reaction energetics, and acetamideelectrosynthesis performance, providing theoretical insights for therational design of high-performance electrocatalysts.</p>","PeriodicalId":50,"journal":{"name":"Langmuir","volume":"42 41","pages":"30890–30901"},"PeriodicalIF":4.4,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149092478","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}