Colloids and Surfaces A: Physicochemical and Engineering Aspects最新文献

{"title":"g-C3N4/PP-CDs Heterostructure with Lewis acidity and alkalinity promoted photocatalytic CO2 reduction to CH3OH","authors":"Yating Zhang ,&nbsp;Xiaomei Ma ,&nbsp;Keke Li ,&nbsp;Jia Jia ,&nbsp;Meng Chen ,&nbsp;Yong-Qiang Dang ,&nbsp;Liang Dai","doi":"10.1016/j.colsurfa.2024.135676","DOIUrl":"10.1016/j.colsurfa.2024.135676","url":null,"abstract":"<div><div>It is expected that photocatalytic reduction of carbon dioxide to produce valuable chemicals play an important role in achieving carbon neutrality goals. Photogenerated electron-hole separation efficiency is one of the factors determining photocatalytic activity. Herein, carbon dots with oxygen-containing protoporphyrin (PP-CDs) were loaded on g-C₃N₄ nanosheets form a heterostructure by a facile mechanical stirring method. The g-C₃N₄/PP-CDs-3 has a conduction band potential of −1.31 eV and a bandgap of 2.51 eV, in the absence of any added photosensitizer and sacrificial agent under illumination, the methanol yield achieved 357.5 μmol·g⁻¹·h⁻¹, which is 2.2 times than that of g-C₃N₄ (162.1 μmol·g⁻¹·h⁻¹), after four cycles, the photocatalytic activity remained unchanged. Based on the experimental and characterizations results, it is indicated that the photocatalytic reduction performance of CO₂ to methanol was improved mainly attributed to the visible light absorption and the high Lewis acidity and alkalinity. Furthermore, the steric hindrance was provided for photogenerated electron-hole recombination due to the recombination of carbon points his work offers a promising strategy for constructing efficient photocatalysts to achieve CO₂ to CH₃OH transformation.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135676"},"PeriodicalIF":4.9,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653353","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":"Redox-active cerium dioxide nanoparticles for mitigating anthracene contamination: Promising solution to polycyclic aromatic hydrocarbon remediation in stormwater-affected soils","authors":"Julian Saenz ,&nbsp;Somayeh Mohammadi ,&nbsp;Bryan Aleman ,&nbsp;Parikrama Sapkota ,&nbsp;Kelly S. Ramirez ,&nbsp;Hamidreza Sharifan","doi":"10.1016/j.colsurfa.2024.135657","DOIUrl":"10.1016/j.colsurfa.2024.135657","url":null,"abstract":"<div><div>Due to the pressing environmental issue of polycyclic aromatic hydrocarbon (PAH) contamination in stormwater, top surface soil amendment by rare-earth-based nanoparticles was investigated as an effective remediation strategy. Here, the amendment of cerium dioxide (CeO₂) nanoparticles (CeO₂-NPs) into topsoil were studied to understand their role in mitigating anthracene contamination. Leveraging the redox activity of CeO₂-NPs, this research demonstrates their capability to adsorb/degrade anthracene, thereby reducing its bioavailability and mobility within the soil. X-ray photoelectron spectroscopy (XPS) and Energy Dispersive X-ray Spectroscopy (EDS) analyses confirmed the homogeneous distribution of CeO₂-NPs and revealed the altered chemical states of carbon, indicative of interaction with anthracene and the soil matrix. Further adsorption studies and soil column tests of four concentrations of anthracene (0, 5, 10, 15 mg/L) revealed their adsorption onto CeO₂-NPs. Further, size distribution, zeta potentials, and TEM images documented the efficiency of this strategy by over 60 %. The role of soil organic matter in the presence of anthracene was further investigated to understand their reciprocal impact on the physiochemical properties of CeO₂-NPs. We extended this analysis by incorporating genomics-based approaches, assessing alterations in community taxonomic structure and function through 16S rDNA profiling and heatmap of microbial diversity as affected by NPs or anthracene. This study enhances our understanding of nanotechnology's potential for environmental remediation of contaminated stormwater run-off.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135657"},"PeriodicalIF":4.9,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653932","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":"Particle size by design: Standardizing measurements for complex topical drug product assessment","authors":"Lucas Chiarentin ,&nbsp;Vera Moura ,&nbsp;Fabio Major ,&nbsp;José Catita ,&nbsp;Margarida Miranda ,&nbsp;Carla Vitorino","doi":"10.1016/j.colsurfa.2024.135679","DOIUrl":"10.1016/j.colsurfa.2024.135679","url":null,"abstract":"<div><div>The physicochemical and biopharmaceutical properties of drug substances and dosage forms can be significantly influenced by particle size. However, the diversity of equivalent particle diameters generated by different methods poses a fundamental challenge in particle size analysis. This study aimed to develop an Analytical Quality by Design (AQbD) approach to accurately assess the particle size of a complex formulation – clobetasol propionate (CP) 0.5 mg/g cream – through automated microscopy (AM) and laser light diffraction (LD). Additionally, Raman spectroscopy was utilized to determine the chemical composition of the formulation particles. In the AQbD approach, prior knowledge was considered for the construction of the Ishikawa diagram and estimate failure mode and effects analysis (FMEA). The methods were developed following the ICH Q8-Q10, and ICH Q14 guidelines, and validated according to ICH Q2, ISO 13320:2020, and EP2.9.31./USP&lt;429&gt;. Results indicate that a trade-off between the techniques must be established for a particle size by design: while LD offers higher throughput and more precise values at the expense of peak resolution and broadening, AM has higher variability but more reliable information in terms of size and shape analysis. The validated methods successfully demonstrated the implementation of an AQbD method in the definition of particle size methods.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135679"},"PeriodicalIF":4.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653354","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":"Tough, self-healing, and freeze-resistant composite dual-network hydrogels for the decontamination of surface uranium (Ⅵ)","authors":"Chuanyi Ma,&nbsp;Jian Li,&nbsp;Yi Wang,&nbsp;Zhanguo Li","doi":"10.1016/j.colsurfa.2024.135682","DOIUrl":"10.1016/j.colsurfa.2024.135682","url":null,"abstract":"<div><div>Hydrogels have attracted widespread attention in the field of surface radioactivity decontamination due to their mild and rapid decontamination processes, as well as their tunable properties. However, fabricating decontamination hydrogels with suitable mechanical properties and environmental adaptability remains challenging. In this study, a tough and freeze-resistant hydrogel (PEAG) was prepared based on graphene oxide (GO), polyvinyl alcohol (PVA), agar (AG), and ethylene glycol (EG) for efficient removal of surface radioactive uranium (VI). Due to the dynamic action of borax and the formation of a nanocomposite dual-network structure, PEAG possesses improved modulus and excellent self-healing properties, allowing the hydrogel to be easily applied to surfaces and to perform operations such as stretching and peeling. In addition, it is found that the PEAG achieves excellent decontamination rates for radioactive uranium (VI) on glass (88.53±1.43 %), stainless steel (86.72±3.41 %), rubber (67.0±2.43 %), ceramics (82.39±1.78 %), and cement (64.52±1.72 %) surfaces, respectively. XPS and contact angle experiments demonstrated that the improved decontamination performance of PEAG is mainly due to the abundant hydroxyl and carbonyl functional groups in the graphene oxide adsorbent, which provide a rich source of complexation sites and enhance its hydrophilic properties for PEAG. Additionally, due to the incorporation of EG, the PEAG hydrogel exhibits good environmental adaptability, which can retain internal moisture and maintain softness and decontamination stability at low temperatures of −20°C. Therefore, PEAG hydrogel is a promising and sustainable candidate material for various surface radioactive decontamination scenarios.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135682"},"PeriodicalIF":4.9,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573041","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":"Improved activation of malachite sulfurization flotation by thiourea's (CS(NH2)2): Performance and mechanism study","authors":"Ayman M. Ibrahim ,&nbsp;Han Wang ,&nbsp;Jaber A. Yousif ,&nbsp;Mohammed Elhadi ,&nbsp;Peilun Shen ,&nbsp;Dianwen Liu","doi":"10.1016/j.colsurfa.2024.135643","DOIUrl":"10.1016/j.colsurfa.2024.135643","url":null,"abstract":"<div><div>In this study, thiourea (CS(NH₂)₂) was an effective activator for promoting the sulfurization flotation of malachite. The flotation behavior of malachite in the presence of this activator was investigated. Experimental results revealed that thiourea is a superior activator for malachite sulfurization, achieving a recovery rate of over 89 % at appropriate dosages. Thiourea-sulfurized malachite forms a surface layer of copper(I) thiocyanate, which facilitates the reduction of Cu(II) to Cu(I) species, leading to the generation of more Cu(I)−S species. These species adsorb more readily onto the malachite surface compared to Cu(II)−S species. The robust layers consist of SCN¯ ligands that combine with copper(I) complexes to form CuSCN species during sulfurization. This enhances malachite surface sulfurization, resulting in higher flotation recovery. Further analysis using ToF−SIMS, FESEM−EDS, and XPS confirmed that thiourea likely chemisorbs onto the malachite surface through sulfurized malachite. The activation mechanisms and the presence of N-atoms in the XPS spectra verified that N−H, C−N, and Cu−N bonds were chemisorbed and formed on the surface, significantly improving the hydrophobicity of sulfurized malachite. This work has important implications for the future application of thiourea activation in flotation processes and could contribute to developing environmentally friendly solutions to meet consumer demand.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135643"},"PeriodicalIF":4.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573040","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":"Complexation of telmisartan with cyclodextrins as a tool of solubility enhancement: A comparative analysis of influence of the cyclodextrin type and method of solid dispersion preparation","authors":"Angelica Sharapova,&nbsp;Marina Ol’khovich,&nbsp;Svetlana Blokhina","doi":"10.1016/j.colsurfa.2024.135662","DOIUrl":"10.1016/j.colsurfa.2024.135662","url":null,"abstract":"<div><div>Cardiovascular telmisartan (TMS) was complexed with modified cyclodextrins (CD) aiming at improvement of its poor solubility which results into low bioavailability. Inclusion complexes with 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) and sulfobutylether-β-cyclodextrin (SBE-β-CD) in liquid and solid state was evaluated for first time. Phase solubility isotherm diagrams of TMS versus the CD concentration were plotted in a buffer pH 7.4. It was found that TMS/CD complexes are formed in solution in an equimolar stoichiometric ratio of 1:1. The aqueous solubility of TMS with the addition of 0.05 mol·L⁻¹ HP-β-CD increased by 23 times and was 38.9·10⁻⁵ mol·L⁻¹, and the presence of the same amount of SBE-β-CD in solution increased the solubility of the drug by 7 times, reaching a value of 12.6·10⁻⁵ mol·L⁻¹.The binding constants were found to 468 and 114 L·mol⁻¹ for HP-β-CD and SBE-β-CD, respectively. Novel solid forms of TMS with both CDs were prepared using the grinding and evaporation approaches. Successful formation of supramolecular TMS/HP-β-CD and TMS/SBE-β-CD solid complexes was confirmed by FTIR, PXRD, DSC, TGA and SEM. The residual crystallinity of all obtained solid dispersions of TMS/CD did not exceed 10 %. Supersaturation was observed during the dissolution of all the solid complexes. The grinding technique was found to be more advantageous as it ensured the biggest improvement of the drug maximum concentration in the aqueous solution: the TMS solubility in the TMS/HP-β-CD(gr) and TMS/SBE-β-CD(gr) solid complexes increased by 27 and 33 times, respectively. Besides, polyvinyl pyrrolidone (PVP) and polyethylene glycol (PEG) were tested as crystallization inhibitors. Addition of 1 wt% PVP as a stabilizer is a promising approach for the preparation of TMS pharmaceutical formulations with improved bioavailability.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135662"},"PeriodicalIF":4.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573003","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":"3D printed conductive hydrogel based on silk fibroin and tetramer-grafted-polyethylenimine micelle for body-motion monitoring","authors":"Xin-Yu Xue ,&nbsp;Lu Han ,&nbsp;He-Qing Cai ,&nbsp;Kou Zhang ,&nbsp;Shi-Lei Dong ,&nbsp;Yu-Long Wang ,&nbsp;Song-Song Yang ,&nbsp;Zhi-Cheng Sun ,&nbsp;Ru-Ping Liu ,&nbsp;Yen Wei","doi":"10.1016/j.colsurfa.2024.135671","DOIUrl":"10.1016/j.colsurfa.2024.135671","url":null,"abstract":"<div><div>Conductive hydrogels hold significant promise for applications in flexible wearable, soft robotics, implantable devices, and other fields, which offer distinct advantages due to their biomimetic structures, intrinsic properties, and biocompatibility. This study builds upon our previous research by fabricating a conductive hydrogel through the combination of 30 % Pluronic F127 and aniline tetramer-grafted-polyethyleneimine (AT-PEI) copolymers. To enhance the properties of hydrogels, we successfully engineered silk fibroin-based conductive hydrogels (SF-AD) by inducing the transition of silk fibroin from a random coil to a β-sheet structure using the F127 and AT-PEI/DNA complex (AD), endowing the hydrogels with dual ionic and electronic conductivity. The conductivity of all hydrogel exceeds 10⁻⁴ S/cm. Additionally, SEM was employed to characterize the pore size of the hydrogels, revealing a decrease with higher AD content. The swelling ratio ranged between 4.89 and 6.50, indicating the tunable nature of the hydrogels' structure. Utilizing 3D printing, we produced a 2 × 2 cm² mesh active conductive layer that ensures a more uniform stress distribution—maximum sensitivity with a grid width of 4 mm. Our assembled hydrogel sensor demonstrated long-term stability in cycling tests over 1000 cycles and proved capable of recognizing various human movements. The SF-AD hydrogel, characterized by its unique combination of properties and potential for customization, presents broad prospects for future applications in flexible electronics.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135671"},"PeriodicalIF":4.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593779","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":"Diclofenac recovery by means of using Emulsion Liquid Membranes: A possible role of surfactant in the mass transfer process","authors":"Adriana Corona-Rodriguez ,&nbsp;Juan Orlando Flores-Rizo ,&nbsp;Maria del Pilar Gonzalez-Muñoz ,&nbsp;Guadalupe Falcon-Millan ,&nbsp;Teresa Alejandra Razo-Lazcano","doi":"10.1016/j.colsurfa.2024.135668","DOIUrl":"10.1016/j.colsurfa.2024.135668","url":null,"abstract":"<div><div>Emulsion Liquid Membranes (ELM) are a useful method for drug extraction in aqueous solution, as they allow their recovery in a highly concentrated acceptor phase after passing through a membrane phase with a high surface area. The success of this process depends on system formulation and operation conditions. One of the most important aspects in the formulation is the addition of a surfactant that stabilizes the system, which can also participate in the mass transfer process. Recently, resistance to mass transfer caused by the use of polymeric surfactants, such as Abil® EM 90, has been reported. To verify this phenomenon observed in previous studies, the effect of various factors on the recovery of diclofenac (DCF) dissolved in an aqueous medium was analyzed using the ELM technique. The study concluded that using a membrane consisting of Abil® EM 90 (2 % w/V), trioctylamine (5 % w/V), and dodecane, along with a stripping phase formed by NaOH (0.10 mol/L), results in successful DCF removal. When emulsified at 15,000 rpm for 10 minutes at room temperature, it is possible to remove over 99 % of DCF after 15 minutes and recover 18.45 % after 30 min. Furthermore, it was determined that the action of the surfactant is the main cause of the resistance to the passage of DCF to the internal phase and its retention in the organic phase, as had already been observed. This is probably due to strong intermolecular interactions between Abil ® EM 90 and DCF and the formation of a complex and stable interfacial structure, similar to a hydrated bilayer, which favors the rigidity of the interface and keeps the drug trapped. A better understanding of the role surfactants play in the system is essential for the future design of more efficient and stable ELMs. This knowledge will enable the adaptation of the technology to a wider range of processes, including drug recovery. As a result, the maximum benefits of this technology can be fully realized.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135668"},"PeriodicalIF":4.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573039","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":"Structural, morphological, magnetic, electrochemical and biocompatible properties of ZnFe2O4/MgFe2O4/NiFe2O4/CeO2 nanocomposites","authors":"Ala Manohar ,&nbsp;Thirukachhi Suvarna ,&nbsp;S.V. Prabhakar Vattikuti ,&nbsp;Panchanathan Manivasagan ,&nbsp;Eue-Soon Jang ,&nbsp;Hemanth P.K. Sudhani ,&nbsp;Abdullah M. Al-Enizi ,&nbsp;Ashok Kumar ,&nbsp;Kuldeep Sharma ,&nbsp;Naresh Mameda ,&nbsp;Ki Hyeon Kim","doi":"10.1016/j.colsurfa.2024.135667","DOIUrl":"10.1016/j.colsurfa.2024.135667","url":null,"abstract":"<div><div>In this research, a novel nanocomposite comprising ZnFe₂O₄, MgFe₂O₄, NiFe₂O₄, and CeO₂ was synthesized and evaluated for its potential in supercapacitor applications, as well as its cytotoxic effects on normal mouse muscle fibroblast (BLO-11) and human breast cancer (MDA-MB-231) cell lines. The field emission-scanning electron microscope (FE-SEM) analysis revealed an average particle size of nearly 10 nm. The transmission electron microscopy (TEM) analysis confirmed an average particle size of 10 ± 1 nm at 600 °C and 11±1 nm at 700 °C. The resulting composite exhibited encouraging electrochemical characteristics, achieving a notable maximum specific capacitance (Cs) of 123.16 F/g at a current density of 0.25 A/g, along with capacitance retention exceeding 95 % at a current density of 5 A/g. Additionally, the electrode demonstrated excellent rate capability and cyclic stability, maintaining its performance over 10,000 continuous cycles. These results indicate that the developed nanocomposite holds considerable promise for electrochemical applications, particularly in the realm of supercapacitors, suggesting new opportunities for the advancement of technology. Furthermore, cytotoxicity assessments revealed minimal effects on both BLO-11 and MDA-MB-231 cell lines, suggesting biocompatibility and potential suitability for biomedical uses. This comprehensive analysis highlights the diverse applications of the synthesized nanocomposites, underlining its potential in both energy storage and biocompatible materials.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135667"},"PeriodicalIF":4.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142653129","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":"Effect of anodic treatment on the electrocatalytic activity of electrodeposited Ni-Mo coatings as cathode materials for hydrogen evolution reaction","authors":"S.A. Korniy,&nbsp;S.A. Halaichak,&nbsp;M.R. Chuchman,&nbsp;V.A. Vynar,&nbsp;B.M. Datsko","doi":"10.1016/j.colsurfa.2024.135677","DOIUrl":"10.1016/j.colsurfa.2024.135677","url":null,"abstract":"<div><div>The influence of anodic treatment of electrodeposited Ni-Mo coatings with different chemical composition, obtained from a self-regulating electrolyte, on the evolution of their morphology and change in roughness parameters was studied. At the same time, the kinetic characteristics of anodic polarization are taken into account, which determine the electrocatalytic activity of the coatings in the hydrogen evolution reaction (HER). The hydrogen evolution reaction on anodized coatings follows the combined Volmer-Heyrovsky mechanism, with the rate determined by the adsorption of hydrogen ions on the coating surface, which correlates with the molybdenum content. The enhanced catalytic properties of the coatings after anodic treatment are attributed to the selective dissolution of nickel, which increases the specific surface area and contributes to the formation of active centers for the electrochemical desorption of hydrogen (molybdenum oxides). The chemical composition and surface morphology of the coatings were investigated using SEM and EDX analyses, while their roughness was assessed by profilometry. Kinetic parameters and the HER mechanism were determined through linear voltammetry and Tafel analysis. The relationships between the kinetic parameters of anodic potentiostatic treatment of Ni-Mo coatings with different compositions in 0.5 M HCl and their surface morphology and roughness coefficients can be used to predict the electrocatalytic activity of materials employed in the electrolytic synthesis of green hydrogen.</div></div>","PeriodicalId":278,"journal":{"name":"Colloids and Surfaces A: Physicochemical and Engineering Aspects","volume":"705 ","pages":"Article 135677"},"PeriodicalIF":4.9,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573037","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}