Applied Surface Science最新文献

英文中文

Plasmonic Ti3C2Tx MXene tuned by Tx moieties in 2D/2D heterojunction for boosting the photocatalytic degradation performances

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2025-03-22 DOI: 10.1016/j.apsusc.2025.163062

Qiyue Jia , Hongyu Gao , Wenling Du, Jiaxin Bai, Mei Li, Jiansheng Liu, Zhanli Chai

Expediting the separation and transfer of photogenerated carriers is crucial for plasmonic materials to improve the performance of photocatalysts. However, it remains a significant challenge to strengthen the local surface plasma resonance (LSPR) through the modulation of surface functional groups. Herein, Ti₃C₂T_x MXene is combined with two typical semiconductor materials to form Ti₃C₂T_x/CdS (TCS) with dominated surface O_x groups and Ti₃C₂T_x/C₃N₄ (TCN) with surface-terminated F_x species. The obtained TCS composite shows a higher photocatalytic performance (96.7 %) than TCN (86.7 %) and the corresponding bare catalysts in the degradation of tetracycline within 60 min under visible-light irradiation. Moreover, the degradation rate of Ti₃C₂T_x/CdS composite decreases by only 2.3 % after 4 cycles photocatalytic process, which is more stable than Ti₃C₂T_x/C₃N₄ (3.3 %) and CdS (39.3 %). The improved photocatalytic activity and stability mainly result from the enhanced LSPR effect of Ti₃C₂T_x MXene. In particular, the better performance of TCS compared to TCN indicates that the LSPR effect is highly related to the surface-terminated [O]/[F] ratio. These results directly provide a strategy to enhance the electric field dynamics of MXene materials for improving photocatalytic performance.

{"title":"Plasmonic Ti3C2Tx MXene tuned by Tx moieties in 2D/2D heterojunction for boosting the photocatalytic degradation performances","authors":"Qiyue Jia , Hongyu Gao , Wenling Du, Jiaxin Bai, Mei Li, Jiansheng Liu, Zhanli Chai","doi":"10.1016/j.apsusc.2025.163062","DOIUrl":"10.1016/j.apsusc.2025.163062","url":null,"abstract":"<div><div>Expediting the separation and transfer of photogenerated carriers is crucial for plasmonic materials to improve the performance of photocatalysts. However, it remains a significant challenge to strengthen the local surface plasma resonance (LSPR) through the modulation of surface functional groups. Herein, Ti3C2Tx MXene is combined with two typical semiconductor materials to form Ti3C2Tx/CdS (TCS) with dominated surface Ox groups and Ti3C2Tx/C3N4 (TCN) with surface-terminated Fx species. The obtained TCS composite shows a higher photocatalytic performance (96.7 %) than TCN (86.7 %) and the corresponding bare catalysts in the degradation of tetracycline within 60 min under visible-light irradiation. Moreover, the degradation rate of Ti3C2Tx/CdS composite decreases by only 2.3 % after 4 cycles photocatalytic process, which is more stable than Ti3C2Tx/C3N4 (3.3 %) and CdS (39.3 %). The improved photocatalytic activity and stability mainly result from the enhanced LSPR effect of Ti3C2Tx MXene. In particular, the better performance of TCS compared to TCN indicates that the LSPR effect is highly related to the surface-terminated [O]/[F] ratio. These results directly provide a strategy to enhance the electric field dynamics of MXene materials for improving photocatalytic performance.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"698 ","pages":"Article 163062"},"PeriodicalIF":6.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143675354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Epitaxial growth mechanism and electronic properties of ultra-thin uranium films on W(110)

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2025-03-22 DOI: 10.1016/j.apsusc.2025.163030

Xiangfei Yang , Jian Wu , Ying Jiang , Qin Liu, Qiuyun Chen, Qiang Zhang, Yun Zhang, Xiaobo Fan, Xiegang Zhu, Shiyong Tan, Qunqing Hao, Wei Feng, Xinchun Lai

Epitaxial growth of uranium films is essential for exploring the exotic properties of U 5f electrons. However, the growth mechanism during the initial stages of U film formation remains unclear. In this study, the adsorption behavior of uranium (U) atoms on a tungsten (W)(110) substrate was investigated using scanning tunneling microscopy (STM) and first-principles calculations. It was found that an isolated U atom is more stable on the hollow site of the W(110) surface compared to the top and bridge sites. Additionally, two U atoms tend to adsorb on neighboring edge-sharing rhomboid hollow sites of W(110). As the concentration of U atoms increases, a directional two-dimensional (2D) growth trend along two high-symmetry directions of 0° and approximately 105° is observed. When the film thickness reaches 4 monolayers (ML), the close-packed U atoms exhibit a pseudo-hexagonal arrangement, accompanied by an enhanced tunneling signal near the Fermi level. Furthermore, thickness-dependent dI/dV spectra were obtained, showing strong consistency with the calculated results. These findings provide a clearer understanding of the initial growth mechanism of ultra-thin U films on the W(110) surface and open new scientific avenues for exploring the remarkable properties of uranium.

{"title":"Epitaxial growth mechanism and electronic properties of ultra-thin uranium films on W(110)","authors":"Xiangfei Yang , Jian Wu , Ying Jiang , Qin Liu, Qiuyun Chen, Qiang Zhang, Yun Zhang, Xiaobo Fan, Xiegang Zhu, Shiyong Tan, Qunqing Hao, Wei Feng, Xinchun Lai","doi":"10.1016/j.apsusc.2025.163030","DOIUrl":"10.1016/j.apsusc.2025.163030","url":null,"abstract":"<div><div>Epitaxial growth of uranium films is essential for exploring the exotic properties of U 5f electrons. However, the growth mechanism during the initial stages of U film formation remains unclear. In this study, the adsorption behavior of uranium (U) atoms on a tungsten (W)(110) substrate was investigated using scanning tunneling microscopy (STM) and first-principles calculations. It was found that an isolated U atom is more stable on the hollow site of the W(110) surface compared to the top and bridge sites. Additionally, two U atoms tend to adsorb on neighboring edge-sharing rhomboid hollow sites of W(110). As the concentration of U atoms increases, a directional two-dimensional (2D) growth trend along two high-symmetry directions of 0° and approximately 105° is observed. When the film thickness reaches 4 monolayers (ML), the close-packed U atoms exhibit a pseudo-hexagonal arrangement, accompanied by an enhanced tunneling signal near the Fermi level. Furthermore, thickness-dependent dI/dV spectra were obtained, showing strong consistency with the calculated results. These findings provide a clearer understanding of the initial growth mechanism of ultra-thin U films on the W(110) surface and open new scientific avenues for exploring the remarkable properties of uranium.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"697 ","pages":"Article 163030"},"PeriodicalIF":6.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143675347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A strategy of hexagonal boron nitride endowing lubricant oil with steady superlubricity

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2025-03-22 DOI: 10.1016/j.apsusc.2025.163060

Yanchun Zhao , Chunxiao Luo , Jiaying Zhang , Xingkai Zhang , Fuguo Wang , Changning Bai

Friction remains the main focus in moving mechanical assemblies as it is directly related to energy consumption, component failures, and operational stability. The use of lubricant oil is a long-term mitigation strategy, but achieving superlubricity still poses challenges. In this study, hexagonal boron nitride nanosheets (h-BNNS)/ chitosan (CS) composite films are successively prepared by ball milling and solution casting methods, then paired with oil medium to achieve superlubricity. The approach enables thin-film uniformity, steady superlubricity, eliminating the difficulty of uniform and stable dispersion of additives. The insertion of long chain CS polymers into the interlayers of hexagonal boron nitride (h-BN) can effectively promote the thinning of bulk h-BN during ball milling process, undoubtedly enhancing the quality of the film. The h-BNNS@CS composite film can act as a physical barrier layer for corrosive media, showing excellent protective capabilities. For h-BNNS@CS composite film paired with glycerol, macroscale superlubricity with the friction coefficient of 0.004 is observed, and a long sliding distance without performance deterioration is maintained. Comparative analyses corroborated that CS could induce glycerol to accumulate near the friction surfaces to form easy-to-shear layers, and h-BNNSs play a role in improving the load-bearing capacity of the nanofluids.

{"title":"A strategy of hexagonal boron nitride endowing lubricant oil with steady superlubricity","authors":"Yanchun Zhao , Chunxiao Luo , Jiaying Zhang , Xingkai Zhang , Fuguo Wang , Changning Bai","doi":"10.1016/j.apsusc.2025.163060","DOIUrl":"10.1016/j.apsusc.2025.163060","url":null,"abstract":"<div><div>Friction remains the main focus in moving mechanical assemblies as it is directly related to energy consumption, component failures, and operational stability. The use of lubricant oil is a long-term mitigation strategy, but achieving superlubricity still poses challenges. In this study, hexagonal boron nitride nanosheets (h-BNNS)/ chitosan (CS) composite films are successively prepared by ball milling and solution casting methods, then paired with oil medium to achieve superlubricity. The approach enables thin-film uniformity, steady superlubricity, eliminating the difficulty of uniform and stable dispersion of additives. The insertion of long chain CS polymers into the interlayers of hexagonal boron nitride (h-BN) can effectively promote the thinning of bulk h-BN during ball milling process, undoubtedly enhancing the quality of the film. The h-BNNS@CS composite film can act as a physical barrier layer for corrosive media, showing excellent protective capabilities. For h-BNNS@CS composite film paired with glycerol, macroscale superlubricity with the friction coefficient of 0.004 is observed, and a long sliding distance without performance deterioration is maintained. Comparative analyses corroborated that CS could induce glycerol to accumulate near the friction surfaces to form easy-to-shear layers, and h-BNNSs play a role in improving the load-bearing capacity of the nanofluids.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"697 ","pages":"Article 163060"},"PeriodicalIF":6.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143675356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Construction and electrochemical corrosion behavior of carbon-based thin films on SS316L bipolar plates by magnetron sputtering

IF 6.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2025-03-22 DOI: 10.1016/j.apsusc.2025.163055

Xiaoxing Yang, Cunlong Zhou, Tianxiang Wang, Jingwei Zhao

The gradually increasing performance requirements of hydrogen fuel cells have posed a great challenge to the conductivity performance of bipolar plates (BPs). In this paper, the SS316L BP with a thickness of 100 μm is taken as the research object, a carbon-based thin film is plated on both surfaces by a magnetron sputtering ion plating system. The electrochemical corrosion behavior and microscopic characterization show that Cr-adopted carbon-based thin film is chemically bonded with the critical surface of the substrate, which can enhance the interfacial bonding force between the thin film and the substrate and form a more stable interfacial structure. The C element in the film structure inhibits the columnar structure of Cr atoms and their nitrides in the high-energy bonding layer, delays the pitting rate of corrosive media, and makes the initial corrosion current density of the surface-modified SS316L BP less than 10⁻⁵A/cm² (meet DoE(Department of Energy) 2025 requirement). This study clarifies the corrosion mechanism of stainless steel bipolar plate coatings under high-temperature and strong acidic conditions and provides a theoretical basis for the preparation of a novel type of highly corrosion-resistant multilayer carbon-based film.

{"title":"Construction and electrochemical corrosion behavior of carbon-based thin films on SS316L bipolar plates by magnetron sputtering","authors":"Xiaoxing Yang, Cunlong Zhou, Tianxiang Wang, Jingwei Zhao","doi":"10.1016/j.apsusc.2025.163055","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163055","url":null,"abstract":"The gradually increasing performance requirements of hydrogen fuel cells have posed a great challenge to the conductivity performance of bipolar plates (BPs). In this paper, the SS316L BP with a thickness of 100 μm is taken as the research object, a carbon-based thin film is plated on both surfaces by a magnetron sputtering ion plating system. The electrochemical corrosion behavior and microscopic characterization show that Cr-adopted carbon-based thin film is chemically bonded with the critical surface of the substrate, which can enhance the interfacial bonding force between the thin film and the substrate and form a more stable interfacial structure. The C element in the film structure inhibits the columnar structure of Cr atoms and their nitrides in the high-energy bonding layer, delays the pitting rate of corrosive media, and makes the initial corrosion current density of the surface-modified SS316L BP less than 10−5A/cm2 (meet DoE(Department of Energy) 2025 requirement). This study clarifies the corrosion mechanism of stainless steel bipolar plate coatings under high-temperature and strong acidic conditions and provides a theoretical basis for the preparation of a novel type of highly corrosion-resistant multilayer carbon-based film.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"32 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143675358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of oxidants on the characteristics of atomic layer deposited TiO2 thin films 氧化剂对原子层沉积二氧化钛薄膜特性的影响

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2025-03-21 DOI: 10.1016/j.apsusc.2025.163044

Jae Hun Hwang , Ga Yeon Lee , Jin Joo Ryu , Ji Woon Choi , Take-Mo Chung , Young Yong Kim , Seung Hoon Oh , Sungjin Park , Youngkwon Kim , Gun Hwan Kim , Taeyong Eom

This study investigated the atomic layer deposition of TiO₂ thin films using H₂O and O₂ plasma as oxidants with titanium tri(dimethylamido)N’-ethoxy-N-methylacetimidamide (Ti(enno)(NMe₂)₃) as a precursor. The investigation examined the influence of these oxidants on the deposition behavior, film properties, and impact of rapid thermal annealing (RTA). The saturated growth per cycle was measured at 0.08 and 0.23 nm∙cy⁻¹ with H₂O and O₂ plasma, respectively. The films deposited with O₂ plasma exhibited lower carbon contamination and superior electrical properties. Moreover, the RTA further enhanced the crystallinity and reduced leakage currents. The measured dielectric constants ranged across 27.9–39.6 and 32.3–37.9 for H₂O and O₂ plasma, respectively. Furthermore, comparisons of the leakage current density and capacitance equivalent thickness (J_g-CET) revealed that the TiO₂ thin film using O₂ plasma and RTA at 1050 °C exhibited the best high-κ characteristics.

{"title":"Influence of oxidants on the characteristics of atomic layer deposited TiO2 thin films","authors":"Jae Hun Hwang , Ga Yeon Lee , Jin Joo Ryu , Ji Woon Choi , Take-Mo Chung , Young Yong Kim , Seung Hoon Oh , Sungjin Park , Youngkwon Kim , Gun Hwan Kim , Taeyong Eom","doi":"10.1016/j.apsusc.2025.163044","DOIUrl":"10.1016/j.apsusc.2025.163044","url":null,"abstract":"<div><div>This study investigated the atomic layer deposition of TiO2 thin films using H2O and O2 plasma as oxidants with titanium tri(dimethylamido)N’-ethoxy-N-methylacetimidamide (Ti(enno)(NMe2)3) as a precursor. The investigation examined the influence of these oxidants on the deposition behavior, film properties, and impact of rapid thermal annealing (RTA). The saturated growth per cycle was measured at 0.08 and 0.23 nm∙cy−1 with H2O and O2 plasma, respectively. The films deposited with O2 plasma exhibited lower carbon contamination and superior electrical properties. Moreover, the RTA further enhanced the crystallinity and reduced leakage currents. The measured dielectric constants ranged across 27.9–39.6 and 32.3–37.9 for H2O and O2 plasma, respectively. Furthermore, comparisons of the leakage current density and capacitance equivalent thickness (Jg-CET) revealed that the TiO2 thin film using O2 plasma and RTA at 1050 °C exhibited the best high-κ characteristics.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"698 ","pages":"Article 163044"},"PeriodicalIF":6.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructural regulation of Zn-Mn alloy oxide films and investigation of corrosion resistance

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2025-03-21 DOI: 10.1016/j.apsusc.2025.163049

Shineng Sun , Jie Yu , Ying Chang , Yiheng Zheng , Chao Wang , Wei Hua

Increasing corrosion resistance has substantial practical importance for the development of Zn alloy surface treatment technology, as zinc and its alloys are commonly used as building decoration materials because to their excellent mechanical properties. In this study, an in-situ film creation process is used for regulating the anodization of Zn-0.5Mn alloy, and the microstructure is significantly impacted by current density. ZnO is the main component of anodization films, which have irregular porosity and imperfections in the surface. The oxide film color tends to be yellow as the current density increases, as confirmed by the chromaticity coordinates. The protective film has an order of magnitude lower corrosion resistance than the Zn-0.5Mn alloy under 10 A/dm² current density, according to the polarization curve and Electrochemical Impedance Spectroscopy measurements. The in-situ growth layer produced in this experiment can effectively extend the service life of the zinc alloy and improve the corrosion resistance of the zinc alloy.

{"title":"Microstructural regulation of Zn-Mn alloy oxide films and investigation of corrosion resistance","authors":"Shineng Sun , Jie Yu , Ying Chang , Yiheng Zheng , Chao Wang , Wei Hua","doi":"10.1016/j.apsusc.2025.163049","DOIUrl":"10.1016/j.apsusc.2025.163049","url":null,"abstract":"<div><div>Increasing corrosion resistance has substantial practical importance for the development of Zn alloy surface treatment technology, as zinc and its alloys are commonly used as building decoration materials because to their excellent mechanical properties. In this study, an in-situ film creation process is used for regulating the anodization of Zn-0.5Mn alloy, and the microstructure is significantly impacted by current density. ZnO is the main component of anodization films, which have irregular porosity and imperfections in the surface. The oxide film color tends to be yellow as the current density increases, as confirmed by the chromaticity coordinates. The protective film has an order of magnitude lower corrosion resistance than the Zn-0.5Mn alloy under 10 A/dm2 current density, according to the polarization curve and Electrochemical Impedance Spectroscopy measurements. The in-situ growth layer produced in this experiment can effectively extend the service life of the zinc alloy and improve the corrosion resistance of the zinc alloy.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"698 ","pages":"Article 163049"},"PeriodicalIF":6.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ablation behavior and mechanism of Al3BC/Al composite coating irradiated by high energy laser 高能激光照射 Al3BC/Al 复合涂层的烧蚀行为与机理

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2025-03-21 DOI: 10.1016/j.apsusc.2025.163045

Zihan Luo, Hongqi Wang, Baoqi Cheng, Guoteng Li, Xia Ma, Kai Zhao, Fengshi Yin, Jinzhao Sun, Yongfeng Zhao

In this work, a new type of laser protective material, i.e. Al₃BC/Al composite coating is proposed. The Al₃BC/Al composite powders used for the spraying process has been firstly fabricated by a sintering process and the submicron Al₃BC particles are in-situ synthesized. The Al₃BC/Al composite coatings were then prepared using a high-velocity air fuel (HVAF) spraying process, and the optimum fabrication parameters were determined by an orthogonal experiment. The Al₃BC/Al composite coatings fabricated by the optimum parameters are dense, with submicron Al₃BC particles uniformly dispersed. The laser ablation behavior of the Al₃BC/Al coating was also investigated in this work. The Al₃BC/Al composite coating endured 10 s before failure, which is twice the laser ablation resistance time of pure Al coating (failure at 5 s), revealing the excellent laser protection performance of the composite coating. By investigating the microstructure evolution of the coating during the laser irradiation, the ablation mechanisms of the coating are revealed. Both the good thermal stability of Al₃BC particles and a further endothermic decomposition reaction contribute to the excellent laser ablation resistance of Al₃BC/Al composite coating. This work will provide a new idea and theoretical guidance for the design of novel laser protective coating material.

{"title":"Ablation behavior and mechanism of Al3BC/Al composite coating irradiated by high energy laser","authors":"Zihan Luo, Hongqi Wang, Baoqi Cheng, Guoteng Li, Xia Ma, Kai Zhao, Fengshi Yin, Jinzhao Sun, Yongfeng Zhao","doi":"10.1016/j.apsusc.2025.163045","DOIUrl":"10.1016/j.apsusc.2025.163045","url":null,"abstract":"<div><div>In this work, a new type of laser protective material, i.e. Al3BC/Al composite coating is proposed. The Al3BC/Al composite powders used for the spraying process has been firstly fabricated by a sintering process and the submicron Al3BC particles are in-situ synthesized. The Al3BC/Al composite coatings were then prepared using a high-velocity air fuel (HVAF) spraying process, and the optimum fabrication parameters were determined by an orthogonal experiment. The Al3BC/Al composite coatings fabricated by the optimum parameters are dense, with submicron Al3BC particles uniformly dispersed. The laser ablation behavior of the Al3BC/Al coating was also investigated in this work. The Al3BC/Al composite coating endured 10 s before failure, which is twice the laser ablation resistance time of pure Al coating (failure at 5 s), revealing the excellent laser protection performance of the composite coating. By investigating the microstructure evolution of the coating during the laser irradiation, the ablation mechanisms of the coating are revealed. Both the good thermal stability of Al3BC particles and a further endothermic decomposition reaction contribute to the excellent laser ablation resistance of Al3BC/Al composite coating. This work will provide a new idea and theoretical guidance for the design of novel laser protective coating material.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"697 ","pages":"Article 163045"},"PeriodicalIF":6.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-atom molybdenum modified ZnIn2S4 nanoflowers for improving photocatalytic hydrogen evolution performance

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2025-03-20 DOI: 10.1016/j.apsusc.2025.163023

Zetian He , Daimei Chen , Shiqing Ma , Lingling Guo , Fengshan Zhou , Yilei Li

The construction of efficient photocatalysts with abundant active sites can effectively address the energy challenge of hydrogen production through water photolysis. In this study, we report an efficient photocatalytic catalyst, consisting of single-atom Mo-modified ZnIn₂S₄ nanoflowers, and propose a mechanism for photocatalytic hydrogen production. Using LA as sacrificial agent under the irradiation of Xe lamp (300W), the photocatalytic hydrogen production rate of the catalyst achieved 138.8 μmol‧h^-1 (per 20 mg of catalyst), which is 3.5 times higher than that of bulk ZnIn₂S₄. And the quantum efficiency of the catalyst reached 23.59 % at the wavelength of 350 nm, demonstrating good stability. The XANES, XPS, FTIR tests confirm that Mo is monoatomically dispersed in the form of Mo-O bonds. The uniformly dispersed single-atom Mo provides abundant active sites, while the formed Mo-O bonds facilitate electron transport and inhibit the recombination of electron-hole pairs, thereby enhancing the photocatalytic hydrogen production activity of ZnIn₂S₄. This work offers a novel approach for the development of single-atom catalytic materials.

{"title":"Single-atom molybdenum modified ZnIn2S4 nanoflowers for improving photocatalytic hydrogen evolution performance","authors":"Zetian He , Daimei Chen , Shiqing Ma , Lingling Guo , Fengshan Zhou , Yilei Li","doi":"10.1016/j.apsusc.2025.163023","DOIUrl":"10.1016/j.apsusc.2025.163023","url":null,"abstract":"<div><div>The construction of efficient photocatalysts with abundant active sites can effectively address the energy challenge of hydrogen production through water photolysis. In this study, we report an efficient photocatalytic catalyst, consisting of single-atom Mo-modified ZnIn2S4 nanoflowers, and propose a mechanism for photocatalytic hydrogen production. Using LA as sacrificial agent under the irradiation of Xe lamp (300W), the photocatalytic hydrogen production rate of the catalyst achieved 138.8 μmol‧h-1 (per 20 mg of catalyst), which is 3.5 times higher than that of bulk ZnIn2S4. And the quantum efficiency of the catalyst reached 23.59 % at the wavelength of 350 nm, demonstrating good stability. The XANES, XPS, FTIR tests confirm that Mo is monoatomically dispersed in the form of Mo-O bonds. The uniformly dispersed single-atom Mo provides abundant active sites, while the formed Mo-O bonds facilitate electron transport and inhibit the recombination of electron-hole pairs, thereby enhancing the photocatalytic hydrogen production activity of ZnIn2S4. This work offers a novel approach for the development of single-atom catalytic materials.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"697 ","pages":"Article 163023"},"PeriodicalIF":6.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Alloy/Interface-Induced activation of Metal-Phosphorus bonds in Ni5Cu3/CoP for efficient water splitting

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2025-03-20 DOI: 10.1016/j.apsusc.2025.163025

Wei Luo , Ning Long , Jing Peng , Wenbin Wang , Yimin Jiang , Wei Shen , Rongxing He , Wei Su , Ming Li

Designing and fabricating heterostructure electrocatalysts composed of alloys and transition metal compounds might be a promising strategy for high-efficiency electrocatalysis. Herein, by anchoring a layer of Ni₅Cu₃ alloy on CoP nanorods with the help of an electrodeposition strategy, an efficient alloy-compound heterointerface catalyst for water splitting, Ni₅Cu₃/CoP, was designed and fabricated successfully. As shown from the experiments, the alloying effect of the Ni₅Cu₃/CoP catalyst induced a super-strong interfacial coupling due to the significant electron outflow from the Ni₅Cu₃ alloy, and it was the synergy of this alloying effect and super-strong interfacial coupling that resulted in the significant activation of cobalt-phosphorus bonds on the catalyst surface to generate rich active sites, which remarkably activated the intrinsic activity of Ni₅Cu₃/CoP. Therefore, in alkaline condition, Ni₅Cu₃/CoP exhibited low hydrogen evolution reaction (HER) overpotential of 66 mV and oxygen evolution reaction (OER) overpotential of 190 mV at 10 mA·cm⁻², respectively, as well as only needed a small cell voltage of 1.51 V to achieve 10 mA·cm⁻² for overall water splitting. Density functional theory (DFT) results revealed that alloy-induced strong interfacial coupling considerably optimized the adsorption of OER and HER intermediates, improving the catalytic activity. These findings provided a valuable insight for the subsequent development of heterogeneous catalysts containing alloy components.

设计和制造由合金和过渡金属化合物组成的异质结构电催化剂可能是实现高效电催化的一种有前途的策略。本文通过电沉积策略在 CoP 纳米棒上锚定一层 Ni5Cu3 合金，设计并成功制备了一种高效的合金-化合物异质界面催化剂 Ni5Cu3/CoP，用于水分离。实验结果表明，Ni5Cu3/CoP 催化剂的合金化效应使 Ni5Cu3 合金中的电子大量外流，从而产生了超强的界面耦合，正是这种合金化效应和超强界面耦合的协同作用，使催化剂表面的钴磷键被大量活化，产生了丰富的活性位点，显著激活了 Ni5Cu3/CoP 的内在活性。因此，在碱性条件下，Ni5Cu3/CoP 在 10 mA-cm-2 的条件下分别表现出较低的氢进化反应（HER）过电位（66 mV）和氧进化反应（OER）过电位（190 mV），并且只需较小的电池电压（1.51 V）即可实现 10 mA-cm-2 的整体水分离。密度泛函理论（DFT）结果表明，合金诱导的强界面耦合大大优化了 OER 和 HER 中间产物的吸附，提高了催化活性。这些发现为后续开发含有合金成分的异质催化剂提供了宝贵的启示。

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引用次数: 0

Light-promoted synergy between CO2 adsorption sites and active oxygen leads to efficient photothermocatalytic dry reforming of methane on Ni/Ni-Sr-Al2O3

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science

Pub Date : 2025-03-20 DOI: 10.1016/j.apsusc.2025.163027

Wenhao Liao , Lei Ji , Yuanzhi Li, Jichun Wu, Meiqi Zhong

Photothermal catalytic dry reforming of methane (DRM) technology opens up a highly potential pathway for converting solar energy into fuels. However, achieving high fuel production rates often requires extremely high light intensities and is accompanied by unfavorable coking side reactions. In response to these challenges, this study successfully synthesized a composite material consisting of nickel nanoparticles (Ni NPs) supported on Ni and Sr co-doped alumina, named Ni/Ni-Sr-Al₂O₃. Under comparatively low light intensity conditions (80.0 kW m⁻²), this composite material exhibited exceptional photothermal catalytic activity. Specifically, the production rates of hydrogen (r_H2) and carbon monoxide (r_CO) achieved 114.2 mmol min⁻¹ g⁻¹ and 129.4 mmol min⁻¹ g⁻¹, respectively, with an efficiency (η) increased to 30.6 %. Compared to a reference catalyst of Ni/Al₂O₃, the Ni/Ni-Sr-Al₂O₃ catalyst shows a 29.6-fold increase in coking resistance. The high efficiency of Ni/Ni-Sr-Al₂O₃ in DRM catalysis is attributed to a light-promoted synergy between CO₂ adsorption sites due to Sr doping and active oxygen due to Ni doping, both of which participate in the oxidation of carbon species (formed by decomposition of methane on Ni nanoparticles). This not only increases catalytic activity, but also significantly inhibits the polymerization of carbon species into coke.

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