Diamond and Related Materials最新文献

{"title":"Advancing Ni-W/diamond coatings with pulse-brush plating: Insights into particle incorporation and hardness","authors":"Jirapan Srimaneerat ,&nbsp;Nujira Kothanam ,&nbsp;Premchai Moolla ,&nbsp;Panya Wintachai ,&nbsp;Napat Triroj ,&nbsp;Komsak Harachai ,&nbsp;Papot Jaroenapibal","doi":"10.1016/j.diamond.2025.112472","DOIUrl":"10.1016/j.diamond.2025.112472","url":null,"abstract":"<div><div>This study investigates the co-electrodeposition process of Ni-W coatings with diamond particles using the pulse-brush plating technique. This method leverages the high flexibility and localized repair capabilities of brush plating while addressing the challenges associated with particle co-deposition. This study systematically investigates the influence of the brushing technique, particle size, and particle concentration on particle co-deposition behavior. The surface morphology, hardness, and adhesion properties of the coatings are also evaluated. The findings indicate that pulse-brushing enables diamond particles to co-deposit with the Ni-W matrix more effectively than continuous brushing, leading to a significant increase in hardness. The incorporation of 1.5 μm particles at a concentration of 40 g/L resulted in the highest measured hardness of 939.56 ± 25.93 HV_0.1. This sample also exhibited excellent adhesion, with cohesive failure occurring at approximately 30 N and no delamination observed. These experimental results demonstrate that pulse-brushing is highly effective in enhancing particle incorporation and improving the coating's mechanical properties, making it a promising technique for surface engineering and the maintenance of materials requiring high durability and strength.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112472"},"PeriodicalIF":4.3,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144166326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"3D porous laser-induced graphene coated sponges for field emission devices and temperature/pressure sensors","authors":"Arun Kumar ,&nbsp;Filippo Giubileo ,&nbsp;Enver Faella ,&nbsp;Maurizio Passacantando ,&nbsp;Fatmanur Kocaman Kabil ,&nbsp;Nihan Aydemir ,&nbsp;Ahmet Yavuz Oral ,&nbsp;Antonio Di Bartolomeo","doi":"10.1016/j.diamond.2025.112471","DOIUrl":"10.1016/j.diamond.2025.112471","url":null,"abstract":"<div><div>Recent interest in flexible sensors, fueled by their affordability, wearability, lightweight design, and ease of fabrication, has driven advancements in applications and fundamental understanding. Herein, we explore the synthesis route of the three-dimensional (3D) graphene-coated sponges and investigate their mechanical and electronic transport properties. Tensile and compression tests on the graphene coated sponges demonstrate Young's modulus of around 0.075 MPa. Electrical measurements with ohmic contacts show DC conductivity as low as 0.5 S/cm. Bonding durability and wettability tests under water immersion and ultrasonic agitation confirmed the strong adhesion and enhanced hydrophobicity of the graphene coating, demonstrating its mechanical and chemical robustness. Temperature measurements reveal a non-monotonic behavior in the sponge's resistance as the temperature decreases. The resistance exhibits a pronounced peak around 250 K as the temperature drops from 295 K to 200 K, followed by a steady increase from 200 K to 77 K. Field emission measurements show a stable current and a reduction in turn-on voltage as the spacing between the anode and the emitting surface decreases, revealing a low turn-on voltage of about 13 V and a field enhancement factor of 286 at an anode-cathode distance of 300 nm. Experimental data are analyzed using the Fowler-Nordheim model, evidencing a non-monotonic dependence of the field enhancement factor on the cathode-anode separation distance in the range of 100–500 nm. The results show that such a flexible 3D graphene coated sponge can be utilized as a sensitive thermistor, a field emitter, and a pressure sensor.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112471"},"PeriodicalIF":4.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144138877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Size-control synthesis of graphene quantum dots in SBA-15 micro-reactor and fabrication of imprinted polymer-based fluorescence sensor for bisphenol A recognition","authors":"Zhanchao Liu ,&nbsp;Shakeel Zeb ,&nbsp;Rongpeng Yu ,&nbsp;Jian Qiu ,&nbsp;Liangyin Xiang ,&nbsp;Jingyong Li ,&nbsp;Yan Liu","doi":"10.1016/j.diamond.2025.112469","DOIUrl":"10.1016/j.diamond.2025.112469","url":null,"abstract":"<div><div>This study develops a fluorescent analytical strategy for the determination of bisphenol A (BPA). The fluorescence sensor utilizes SBA-15 as a micro-reactor to fabricate size-controlled graphene quantum dots (GQDs), followed by the synthesis of a GQD-supported polymer (BPA-MIP) via precipitation polymerization using BPA as the template. The fluorescence method demonstrated a direct correlation in the concentration range of 0.5 to 20.00 μmol L⁻¹ for BPA, with a limit of detection (LOD) of 0.180 μmol L⁻¹ and a limit of quantification (LOQ) of 0.564 μmol L⁻¹. Fluorescence decay analysis revealed a lifetime (τ) of 31.87 ns for GQDs and 31.64 ns for BPA-MIP (0.8 μmol L⁻¹ BPA), with the reduced lifetime indicating dynamic quenching behavior, thereby confirming the sensor's capability for BPA detection. The method demonstrated excellent repeatability, with intra- and inter-day relative standard deviations of 1.18 % and 2.01 %, respectively, confirming the reliability of the developed fluorescence sensor. The analysis of selectivity revealed that the proposed fluorescence sensor is highly effective for BPA determination. The proposed fluorescence sensor probe was effectively utilized to three spiked beverage samples, resulting in satisfied recoveries between 100.40 % and 104.80 %.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112469"},"PeriodicalIF":4.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrogen storage performance of T-shaped graphene monolayer with Li modification: First-principles calculations","authors":"Zhao-Peng Liu ,&nbsp;Chao-Bo Wang ,&nbsp;Kai Du ,&nbsp;Wei-Jiang Gong","doi":"10.1016/j.diamond.2025.112458","DOIUrl":"10.1016/j.diamond.2025.112458","url":null,"abstract":"<div><div>Buckled T-shaped graphene (BTG) and planar T-shaped graphene (PTG) were chosen to improve hydrogen storage efficiency. Theoretical calculations suggested the stability and reliability of the two configurations of T-shaped graphene (TG), as well as their potential for experimental fabrication. After introducing lithium (Li) atom decorations on the TG monolayer, their effectiveness in enhancing hydrogen storage capacity was verified. It was found that each Li atom on the BTG structure can adsorb up to three H <span><math><msub><mrow></mrow><mn>2</mn></msub></math></span> molecules, whereas on the PTG structure, up to five H <span><math><msub><mrow></mrow><mn>2</mn></msub></math></span> molecules can be adsorbed per Li atom. The average adsorption energies were calculated to be <span><math><mo>−</mo><mn>0.15</mn></math></span> and <span><math><mo>−</mo><mn>0.17</mn></math></span> eV/H <span><math><msub><mrow></mrow><mn>2</mn></msub></math></span> for BTG and PTG, respectively. When considering the maximum Li decoration on both upper and lower surfaces of TG, the resulting hydrogen storage capacities reach 8.8 wt%. Furthermore, the critical temperature of hydrogen was found to be significantly lower than the desorption temperature (<span><math><msub><mi>T</mi><mi>D</mi></msub></math></span>), further emphasizing the promise of TG–Li monolayers as alternative materials for hydrogen storage.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112458"},"PeriodicalIF":4.3,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative study of deposition characteristics a-C:H films by plasma CVD using methane, acetylene, and cumene","authors":"Shinjiro Ono ,&nbsp;Takamasa Okumura ,&nbsp;Kunihiro Kamataki ,&nbsp;Pankaj Attri ,&nbsp;Kazunori Koga ,&nbsp;Masaharu Shiratani ,&nbsp;Kei Watanabe ,&nbsp;Hiroyuki Fukumizu","doi":"10.1016/j.diamond.2025.112468","DOIUrl":"10.1016/j.diamond.2025.112468","url":null,"abstract":"<div><div>High durability of hydrogenated amorphous carbon (a-C:H) films is one of the significant interests for improving their performance as hard masks in semiconductor processes. In this study, to achieve high-density, low-stress a-C:H films with high deposition rates, we used plasma chemical vapor deposition (CVD) to fabricate a-C:H films using uncommon hydrocarbons precursors like cumene (C₉H₁₂) and compared the film deposition characteristics with conventional hydrocarbons precursors like methane (CH₄) and acetylene (C₂H₂). We evaluated the deposition characteristics of a-C:H films using all the precursors in terms of their concentration, reactor pressure, and self-bias voltage. Additionally, we analyzed the structure of the a-C:H films using Raman spectroscopy. Among all the films deposited, the deposition characteristics (mass density, deposition rate, and stress) of films deposited using cumene demonstrated superior characteristics compared to other molecules, suggesting its potential suitability for advanced applications. The films for cumene showed a wide variation of mass density from 1.0 g/cm³ to 2.0 g/cm³ with changing self-bias voltage. At low self-bias voltages (60 V–230 V), the films were polymer-like with a high hydrogen content, whereas, at high self-bias voltages (580 V–1100 V), the films were hard with a low hydrogen content. On the other hand, each film with methane and acetylene showed a narrower variation of mass density from 1.4 g/cm³ to 2.0 g/cm³ with changing self-bias voltage than that for cumene. These results suggest that the film structure can be diversely controlled through the self-bias voltage depending on the number of carbon atoms in one molecule rather than the type of molecular species.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112468"},"PeriodicalIF":4.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144134094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Permeation selectivity of defected hexagonal boron nitrides sheets towards H2","authors":"Tariq Mahmood","doi":"10.1016/j.diamond.2025.112462","DOIUrl":"10.1016/j.diamond.2025.112462","url":null,"abstract":"<div><div>Membranes are selective filters, can offer separation efficiencies which are difficult or impossible to achieve otherwise. Herein, the permeability potential of defected hexagonal boron nitride sheet for several environmentally important gaseous molecules is explored. The considered defects are mono-vacancy, divacancy and tri-vacancy. The results illustrate that the nature of the defect besides pore morphology has significant effect on the permeation ability for gas molecules. The barriers are drastically higher for boron vacancy hexagonal boron nitride sheet V_B-<em>h</em>-BN and range from 73 kcal mol⁻¹ for H₂ to 442 kcal mol⁻¹ for CO. The barriers are drastically higher for species where incoming atom is electronegative and has highly unfavorable interactions with the nitrogen atoms in the defect. An inverse effect is observed for permeation through V_B-<em>h</em>-BN defect mainly due to the presence of electropositive boron atoms in the defect. Quite significant selectivity for H₂ permeation is observed for V_B(2N)-<em>h</em>-BN sheet where the barriers for H₂ permeation is at least 20 kcal mol⁻¹ lower than any other species (BeH₂ and BeF₂). The lowest barrier for H₂ permeation (8.38 kcal mol⁻¹) with even higher selectivity is observed for V_N(2B)-<em>h</em>-BN sheet. The lower permeation barrier is seen for H₂ gas which is 1.01 kcal mol⁻¹ large size V_B(2N)-<em>h</em>-BN nanosheet which is further decreases in aqueous medium. These results clearly demonstrate that fine tuning the nature and size of defect can offer purification of H₂ from a mixture of gases which is quite for hydrogen economy. These results will promote exploration of other functional materials for the purification of H₂.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112462"},"PeriodicalIF":4.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144123568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uniformly N, O-dopant dispersion in hierarchical porous carbon through “pre-functionalization strategy” for high-performance supercapacitor application","authors":"Yingjie Liu,&nbsp;Yanhui Wang,&nbsp;Qingpeng Sun,&nbsp;Tingting Wang,&nbsp;Junxia Guo,&nbsp;Jinfeng Sun,&nbsp;Shaofei Zhang","doi":"10.1016/j.diamond.2025.112466","DOIUrl":"10.1016/j.diamond.2025.112466","url":null,"abstract":"<div><div>Biomass-derived carbon with a porous structure demonstrates great potential as an advanced material for supercapacitors. However, the rationally customizing of surface functionalities for optimized performance is still challenging. In this paper, a series of hierarchical porous carbons (HPCs) with tailored nitrogen and oxygen co-doping (N, O-HPCs) were prepared by in-situ graft polymerization of glycine (Gly) on astragalus polysaccharide (APS) and followed by activation‑carbonization. Comparing with traditional impregnation techniques, the Mannich reaction during graft polymerization enables the intentional attachment of amino-groups, which serves as nitrogen sources to the APS. Additionally, the amino-group modification reduces the carbonization energy barrier of APS. The KOH-activated carbons exhibit a uniform and high dispersion of N and O dopants, characterized by a unique hierarchical porosity that combines interconnected honeycomb channels with a wealth of micro−/ <em>meso</em>−/ macropores. The optimized N, O-HPC-800 exhibited a high specific capacitance of 210.0 F g⁻¹ at 0.5 A g⁻¹, good rate capability (remain 112.0 F g⁻¹ at 10 A g⁻¹), and outstanding cycling durability (95 % after 10,000 cycles). The assembled N, O-HPC-800|| N, O-HPC-800 symmetric supercapacitor also presents high energy outputs of 18 Wh·kg⁻¹ at power density of 200 W kg⁻¹.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112466"},"PeriodicalIF":4.3,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modulation of bonding structure and mechanical properties of DLC coatings by binary doping: Molecular dynamics simulation","authors":"Hongbo Luo ,&nbsp;Yanjun Lü ,&nbsp;Xiaowei Zhao ,&nbsp;Yongfang Zhang","doi":"10.1016/j.diamond.2025.112465","DOIUrl":"10.1016/j.diamond.2025.112465","url":null,"abstract":"<div><div>Diamond-like carbon (DLC) coatings are among the most promising wear-resistant materials for piston ring-cylinder liner (PRCL) systems. However, their widespread application is limited by poor adhesion to substrates and high internal stresses. In this study, we employed molecular dynamics (MD) simulations to investigate the properties of DLC coatings doped with binary carbophilic elements (Si/Cr) at varying atomic fractions. The bonding structure and mechanical properties were analyzed using radial distribution function (RDF), coordination number (CN), nanoindentation, shear strain, and von Mises stress distributions. The results show that the sp³ hybridization fraction decreased to 66.9 % in the S10 sample (Si 10 at.%). The S2 sample (Cr 10 at.%) exhibited the highest hardness and elastic modulus, reaching 110.03 GPa and 244.15 GPa, respectively—an improvement of 31.9 % and 18.4 % compared to the pure DLC (S1) sample. The S7 sample (Cr 4 at.%, Si 6 at.%) achieved the highest <em>H</em>/<em>E</em>_S ratio (0.441), which was 22.5 % higher than that of S1(pure DLC), indicating enhanced wear resistance and reduced susceptibility to plastic deformation. Shear strain and von Mises stress distributions after nanoindentation revealed isotropic material behavior and hemispherical shear strain diffusion in the doped samples. Notably, the S7 sample exhibited the lowest von Mises stress (134.5 GPa), 69 % reduction relative to pure DLC. In conclusion, binary doping (Si/Cr) significantly improved the mechanical properties, wear resistance, shear strain distribution, and von Mises stress response of DLC coatings compared to undoped DLC. Considering both wear resistance and plastic deformation resistance, the S6 coating demonstrated optimal performance. This study provides valuable insights for enhancing the performance and applicability of DLC coatings in industrial applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"157 ","pages":"Article 112465"},"PeriodicalIF":4.3,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Doum fiber-derived activated carbon via H₃PO₄-assisted pyrolysis for sulfamethoxazole removal: Box-Behnken Design optimization and mechanistic approach","authors":"Abdelali Grich,&nbsp;Aicha Naboulsi,&nbsp;Taoufiq Bouzid,&nbsp;Hicham Yazid,&nbsp;Ali Elbasraoui,&nbsp;Abdelmajid Regti,&nbsp;Mamoune El Himri,&nbsp;Mohammadine El Haddad","doi":"10.1016/j.diamond.2025.112464","DOIUrl":"10.1016/j.diamond.2025.112464","url":null,"abstract":"<div><div>The widespread presence of pharmaceutical pollutants such as sulfamethoxazole (SMX) in water bodies has become an increasingly pressing environmental issue, largely due to their persistence and potential risks to human and ecological health. Traditional water treatment technologies often fall short in removing these contaminants efficiently, underscoring the need for innovative, sustainable solutions. In this study, we explore the use of an eco-friendly mesoporous activated carbon derived from Doum fiber waste (<em>Chamaerops humilis</em>) for the effective removal of SMX from aqueous environments. The material was produced through chemical activation using phosphoric acid (H₃PO₄) and pyrolysis, resulting in a porous adsorbent with a high surface area of 768 m²/g. Characterization of the raw Doum fiber revealed it to be rich in lignocellulosic components, with cellulose, hemicellulose, and lignin contents of 31 wt%, 25 wt%, and 17.8 wt%, respectively. The structural and surface features of the synthesized carbon were thoroughly examined using techniques such as FTIR, XRD, SEM, TGA, and BET analysis. To systematically optimize the adsorption conditions, we employed Response Surface Methodology (RSM) coupled with Box-Behnken Design (BBD), investigating the effects of four key factors: adsorbent dose (5–35 mg), SMX concentration (5–45 mg/L), solution pH (2−12), and contact time (10–120 min). Moreover, the adsorption mechanism was investigated at the molecular level through Density Functional Theory (DFT) calculations, offering detailed insights into the interaction between SMX molecules and the activated carbon surface. Experimental results indicated that the adsorption followed the Langmuir isotherm model, suggesting monolayer adsorption, with a maximum capacity of 77.02 mg/g. Kinetic data best fit the pseudo-second-order model (R² = 0.99, χ² = 0.22), implying that chemisorption is the rate-limiting step. Thermodynamic parameters confirmed that the process is spontaneous and exothermic. Under optimized conditions (25 mg adsorbent, 29 mg/L SMX, pH 9, and 107 min of contact time), SMX removal reached 96.12 %. The adsorption was primarily governed by electrostatic attractions, π–π interactions, hydrogen bonding, and pore-filling mechanisms, particularly effective under acidic to neutral pH levels. To the best of our knowledge, this work is the first to demonstrate the potential of phosphoric acid-activated Doum fiber carbon for SMX removal, highlighting its promise as a sustainable, high-efficiency material for water purification applications.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112464"},"PeriodicalIF":4.3,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144098442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced corrosion resistance of titanium bipolar plates for PEMFC by N/Ti co-doped a-C pseudo-multilayer coating","authors":"Zhengde Wang ,&nbsp;Jin Li ,&nbsp;Jianxiang Lv ,&nbsp;Bin Zhang","doi":"10.1016/j.diamond.2025.112463","DOIUrl":"10.1016/j.diamond.2025.112463","url":null,"abstract":"<div><div>As a key component of PEMFC, the Ti bipolar plates exhibit unsatisfactory corrosion resistance and surface electric conductivity under operating conditions. Herein, a N/Ti co-doped a-C pseudo-multilayer coating was successfully deposited on Ti bipolar plates using our home-made PVD system. Such modified Ti bipolar plates fully comply with the DOE 2025 target for PEMFC. We attributed the excellent performance to the unique pseudo-multilayer coating, which maintains structural continuity without noticeable delamination, featuring a dense microstructure and exceptional corrosion resistance. Moreover, the injection of N₂ not only reduced the sputtering yield of Ti target but also facilitated the transition from sp² to sp³ hybridization state in a-C and the conversion of Ti<img>C to Ti<img>N bonds, consequently improving the coating's corrosion resistance and durability. Our work provides an effective coating strategy to enhance both corrosion resistance and electrical conductivity of Ti bipolar plates.</div></div>","PeriodicalId":11266,"journal":{"name":"Diamond and Related Materials","volume":"156 ","pages":"Article 112463"},"PeriodicalIF":4.3,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}