Applied Surface Science最新文献_第4页

Litchi-like Sn-MOF derived SnS2@SC composite as an advanced anode material for Lithium-Ion batteries

IF 6.7 2区材料科学

Applied Surface Science Pub Date : 2024-12-18 DOI: 10.1016/j.apsusc.2024.162116

Xin Zhou, Qianqian Wu, Enwang Ma, Huizhong Xu, Yufeng Zhu, Minghui Zhao, Jianjian Lin, Wei Li

{"title":"Litchi-like Sn-MOF derived SnS2@SC composite as an advanced anode material for Lithium-Ion batteries","authors":"Xin Zhou, Qianqian Wu, Enwang Ma, Huizhong Xu, Yufeng Zhu, Minghui Zhao, Jianjian Lin, Wei Li","doi":"10.1016/j.apsusc.2024.162116","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162116","url":null,"abstract":"Tin-based metal materials are promising anode candidates for lithium-ion batteries due to their high theoretical capacity. However, their practical application is constrained by significant volume expansion, structural degradation, and slow electron transfer kinetics. In this study, a lyotropic Sn-MOF was synthesized using tin sulfate and terephthalic acid as the tin source and organic ligand. The lychee-like Sn-MOF was then utilized as a precursor to prepare a hollow porous SnS2@SC composite containing S-doped carbon through a hydrothermal method. The SnS2@SC composite features nanoflower-like SnS2 embedded in a carbon skeleton, which increases the specific surface area, while the hollow structure derived from the Sn-MOF provides an efficient conductive network and buffer space to enhance electrochemical performance. As a result, the SnS2@SC electrode exhibits an impressive initial discharge capacity of 1062.9 mAh g−1 at 0.1 A g-1 and excellent long-term cycling stability, retaining 689.5 mAh g−1 at 2.0 A g-1 after prolonged cycling. This study offers a viable strategy for the rational design of bimetallic sulfide heterostructures and provides insights into the development of advanced electrochemical applications.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"102 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142840852","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

Lamellar intercalated spherical Na3V2(PO4)34 with enlarged surface area induced by phenol-formaldehyde boosting high capacity and long lifespan for sodium ion batteries

IF 6.7 2区材料科学

Applied Surface Science Pub Date : 2024-12-18 DOI: 10.1016/j.apsusc.2024.162120

Hongen Shi, Yanzhong Wang, Zhen Tian, Baofeng Zhang, Li Guo, Yanjun Chen

{"title":"Lamellar intercalated spherical Na3V2(PO4)34 with enlarged surface area induced by phenol-formaldehyde boosting high capacity and long lifespan for sodium ion batteries","authors":"Hongen Shi, Yanzhong Wang, Zhen Tian, Baofeng Zhang, Li Guo, Yanjun Chen","doi":"10.1016/j.apsusc.2024.162120","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162120","url":null,"abstract":"To improve the inherent conductivity and extend the cycling durability of Na3V2(PO4)3 (NVP), this study suggests a technique for synthesis of phenol-formaldehyde (PF) resin-derived lamellar intercalated spherical NVP (PF-NVP/C) structures via solvothermal method. The unique lamellar intercalated sphere structure typically possesses good mechanical toughness, enabling better tolerance to the current impact. Moreover, spherical morphology features a significantly enlarged specific area of 144.32 m2 g-1, facilitating full contact between electrolyte and electrode, and providing additional active sites for Na+ storage. Coupled with protective effect of carbon coating layers, the cycling stability is significantly improved. Meanwhile, highly conductive graphitized carbon skeleton from the pyrolysis of PF bonding with the uniform amorphous carbon layers constructs favourable networks for electronic transportation. Notably, the modified PF-NVP/C delivers a capacity of 115.5 mAh g-1 at 0.1 C. Remarkably, it can maintain a high capacity of 71.1 mAh g-1 and keeps 50.8 mAh g-1 even after 16000 cycles at 50 C, exhibiting outstanding cycling stability. Ex-situ XRD indicates the redox reaction of V3+/V4+ is highly reversible. Furthermore, by comparing morphological and electrochemical kinetic characteristics of the PF-NVP/C before and after cycling, further evidence is provided to demonstrate its unique lamellar intercalated spherical morphology and excellent structural stability.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"23 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848968","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

Flotation separation of galena and chalcopyrite by using hydroxyl radicals from an Fe2+/NaClO system as depressants 利用 Fe2+/NaClO 系统中的羟基自由基作为抑制剂浮选分离方铅矿和黄铜矿

IF 6.7 2区材料科学

Applied Surface Science Pub Date : 2024-12-18 DOI: 10.1016/j.apsusc.2024.162128

Haiyu Zhang, Qinbo Cao, Yan Yan, Heng Zou, Xingguo Huang, Dianwen Liu

{"title":"Flotation separation of galena and chalcopyrite by using hydroxyl radicals from an Fe2+/NaClO system as depressants","authors":"Haiyu Zhang, Qinbo Cao, Yan Yan, Heng Zou, Xingguo Huang, Dianwen Liu","doi":"10.1016/j.apsusc.2024.162128","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162128","url":null,"abstract":"The flotation separation of galena (PbS) and chalcopyrite (CuFeS2) is not yet fully resolved due to the lack of efficient depressants. This study proposed a new depressant, i.e. an Fe2+/NaClO system, as an efficient PbS depressant. The inhibition effect of the Fe2+/NaClO system is attributed to the oxidation effect of •OH radicals from the reaction between HClO and Fe2+. The recovery of PbS is only 9.48 % and that of CuFeS2 is 82.33 % under the following conditions: pH 3.5, 4 min reaction time, 10:1 Fe2+:NaClO molar ratio and 1 × 10−2 mol/L NaClO concentration. Contact angle test results suggested that the hydrophobicity of PbS was decreased by conditioning with the Fe2+/NaClO system. X-ray photoelectron spectroscopy results showed that the S2− species on the PbS surface was oxidised into SO42−, and thus, PbSO4 occurred on the PbS surface. Furthermore, SO42− concentration reached 61.67 % of the total S species. Oxidative production coated the PbS surface well, depressing PbS flotation. However, the Fe2+/NaClO system barely changed the components of the CuFeS2 surface. The CuFeS2 surface still exhibits a high hydrophobic level. Therefore, PbS can be efficiently separated from CuFeS2 by using the Fe2+/NaClO system.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"115 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142840808","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

Unlocking the potential of bismuth oxybromide microflowers supported silver nanosphere as a SERS platform for detection of nitrofurantoin

IF 6.7 2区材料科学

Applied Surface Science Pub Date : 2024-12-18 DOI: 10.1016/j.apsusc.2024.162145

Thangavelu Kokulnathan, Kalingarayanpalayam Matheswaran Arun Kumar, Tzyy-Jiann Wang, Allen Joseph Anthuvan, Cheng-Li Chang

{"title":"Unlocking the potential of bismuth oxybromide microflowers supported silver nanosphere as a SERS platform for detection of nitrofurantoin","authors":"Thangavelu Kokulnathan, Kalingarayanpalayam Matheswaran Arun Kumar, Tzyy-Jiann Wang, Allen Joseph Anthuvan, Cheng-Li Chang","doi":"10.1016/j.apsusc.2024.162145","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162145","url":null,"abstract":"The accurate detection of antibiotic residues in the environmental and food samples is crucial for ensuring ecosystem safety and human health. Surface enhanced Raman spectroscopy (SERS) has emerged as a powerful analytical technique due to its specificity and sensitivity. In this study, we present the synthesis of noble-metal/2D-semiconductor composites consisting of silver nanospheres and bismuth oxybromide microflowers (Ag-NSs/BiOBr-MFs) for SERS antibiotic detection of nitrofurantoin (NFT). The characteristics of Ag-NSs/BiOBr-MFs composite was examined using various microscopic and spectroscopic methods. The Ag-NSs/BiOBr-MFs composite exhibits precise quantitative detection of NFT in the concentration range from 10–4 to 10–12 M with a good linear relationship. The NFT detection using the Ag-NSs/BiOBr-MFs composite demonstrates superior SERS performance, including an ultralow limit of detection of 1.86 × 10–12 M and a high enhancement factor of 2.75 × 1010. The highly effective SERS performance of Ag-NSs/BiOBr-MFs composite is due to the formation of numerous hot spots, the effective charge transfer across wide heterogeneous interface, and the synergistic action of electromagnetic and charge transfer mechanisms. The Ag-NSs/BiOBr-based SERS substrate successfully detects the NFT spiked in actual samples with interference compounds, achieving an ultra-low limit of detection of 3.55 × 10–12 M. These findings highlight the attractive performance of the Ag-NSs/BiOBr-MFs composite-based SERS platform, which holds great potential for practical applications in sensitive food and environmental detection.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"77 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848934","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

Enhanced Photocatalytic CO2 Reduction to CH4 via Phosphorus-doped Carbon Nitride with Cu-Cu Coordinated Sites 通过具有铜-铜配位的掺磷氮化碳增强光催化二氧化碳还原为甲烷的能力

IF 6.7 2区材料科学

Applied Surface Science Pub Date : 2024-12-18 DOI: 10.1016/j.apsusc.2024.162153

Bing Liu, Shangcong Su, Ye Song, Haitao Song, Wei Lin

{"title":"Enhanced Photocatalytic CO2 Reduction to CH4 via Phosphorus-doped Carbon Nitride with Cu-Cu Coordinated Sites","authors":"Bing Liu, Shangcong Su, Ye Song, Haitao Song, Wei Lin","doi":"10.1016/j.apsusc.2024.162153","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162153","url":null,"abstract":"The photocatalytic CO2 reduction to high-value chemicals has attracted significant global interests. Despite extensive research, the efficiencies of the reported photocatalysts are hindered by inadequate light absorption, limited photoelectron transfer rates, and other associated factors. In this study, we present a facile synthesis of a novel Cu&P@C3N4, catalyst, featuring Cu-Cu coordination and P doping. Compared to pristine C3N4, the carrier separation efficiency and light absorption capacity of Cu&P@C3N4 are both significantly enhanced. This catalyst exhibits a remarkable photocatalytic CO2 reduction activity, achieving a performance of 25.1 times greater than pristine C3N4, coupled with exceptional CH4 selectivity exceeding 96%. Our findings provide new insights into the design and synthesis of high-efficient and low-cost photocatalysts, paving the way for advancements in CO2 reduction reaction (CO2RR) technology and contributing to a more sustainable and environmentally friendly future.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"88 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848970","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

Photocatalytic production of H2O2 over rutile TiO2 supported with Pd nanoparticles

IF 6.7 2区材料科学

Applied Surface Science Pub Date : 2024-12-17 DOI: 10.1016/j.apsusc.2024.162124

Timur Fazliev, Danil Polskikh, Dmitry Selishchev

{"title":"Photocatalytic production of H2O2 over rutile TiO2 supported with Pd nanoparticles","authors":"Timur Fazliev, Danil Polskikh, Dmitry Selishchev","doi":"10.1016/j.apsusc.2024.162124","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162124","url":null,"abstract":"Hydrogen peroxide is a valuable chemical, which is commonly employed in environmental application for advanced oxidation processes and in energy application for fuel cells. Local production of H2O2 directly at sites of its consumption can eliminate risks and costs associated with transportation of concentrated H2O2 solutions. In this study, we investigated the ability of rutile or anatase TiO2 modified with Pd nanoparticles to produce hydrogen peroxide via photocatalytic oxygen reduction. Surface modification of TiO2 with Pd cocatalyst allowed H2O2 generation in both deionized water and water-methanol solution under UV-LED irradiation. Rutile TiO2 supported with Pd nanoparticles exhibited boosted photocatalytic activity in H2O2 formation compared to anatase-based photocatalyst·H2O2 was shown to predominantly form through the pathway of oxygen reduction, and observed difference in activity was attributed to different positions of energy bands in rutile and anatase phases. Methanol as an efficient electron donor substantially increased the amount of evolved H2O2. Rate constants of H2O2 generation over Pd-decorated rutile TiO2 were 1.7 μmol min−1 in deionized water and 7.4 μmol min−1 in water-methanol solution (10 vol%). This study reveals the potential of rutile for design of efficient heterostructured composites with other narrow-band semiconductors for photocatalytic generation of H2O2 under solar light.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"11 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142840819","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

Nickel films deposited between amorphous silicon layers: Effects of annealing, Ni/Si interface and magnetic properties

IF 6.7 2区材料科学

Applied Surface Science Pub Date : 2024-12-17 DOI: 10.1016/j.apsusc.2024.162122

Marin Tadić, Matjaž Panjan, Janez Kovač, Miha Čekada, Peter Panjan

{"title":"Nickel films deposited between amorphous silicon layers: Effects of annealing, Ni/Si interface and magnetic properties","authors":"Marin Tadić, Matjaž Panjan, Janez Kovač, Miha Čekada, Peter Panjan","doi":"10.1016/j.apsusc.2024.162122","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162122","url":null,"abstract":"This study demonstrates exceptional magnetic properties associated with magnetic anisotropy in nickel layers approximately 23–28 nm thick, deposited between amorphous silicon layers (a-Si/Ni/a-Si) using triode sputtering. X-ray diffraction (XRD) analyses confirm the presence of the Ni phase in the samples. Furthermore, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) measurements reveal a trilayer structure consisting of nickel and silicon. These techniques also highlight the surface roughness of the nickel layer and detail the characteristics of the Ni/Si interface. Magnetic properties were evaluated using a vibrating sample magnetometer (VSM). The samples were annealed at temperatures up to 190 °C to optimize their magnetic characteristics. After annealing, the samples exhibited a high perpendicular remanence ratio (Mr/MS ≈ 1), high perpendicular coercivity (HC = 620 Oe), and a high effective perpendicular magnetic anisotropy energy density (Keff*t ≈ 1.16 erg/cm2). These properties are particularly interesting because of the substantial thickness of the nickel layer. Achieving nickel films thicker than 15 nm with perpendicular magnetic anisotropy (PMA) has been challenging. The origin of PMA is attributed to magnetoelastic anisotropy and internal strains, which are related to diffusion processes and thermal expansion mismatch between the Ni layer and the Ni/Si and a-Si layers.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"7 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142840810","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

Competition of hydrogen desorption and migration on graphene surface in alternating electric field: Multiscale molecular dynamics and diffusion study

IF 6.7 2区材料科学

Applied Surface Science Pub Date : 2024-12-17 DOI: 10.1016/j.apsusc.2024.162125

Alexey I. Podlivaev, Konstantin P. Katin

{"title":"Competition of hydrogen desorption and migration on graphene surface in alternating electric field: Multiscale molecular dynamics and diffusion study","authors":"Alexey I. Podlivaev, Konstantin P. Katin","doi":"10.1016/j.apsusc.2024.162125","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162125","url":null,"abstract":"Hydrogen desorption and its migration on the graphene surface under the alternating electric field have been investigated with the tight-binding molecular dynamics and a large-scale diffusion model. The temperature and field amplitude were set within a range of 1000 to 1500 K and 0 to 1 V/Å, respectively. Field-induced oscillations of hydrogen atom were found to be essentially anharmonic. The optimal amplitude-dependent field frequencies resulting in the highest hydrogen displacement have been defined. The activation energies and frequency factors related to desorption and migration processes at varying electric field amplitudes have been calculated. Based on the microscopic data, we have proposed a diffusion model for hydrogens on locally irradiated graphene applicable at room temperature. A valuable reduction in the concentration of hydrogen in the irradiated graphene was observed. The width of the transition region between the non-irradiated graphene with high hydrogen concentration and the irradiated graphene with a reduced hydrogen concentration has been estimated.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"7 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142840817","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

Robust adsorption of ellagic acid on galena surface for efficient flotation separation of molybdenite and galena

IF 6.7 2区材料科学

Applied Surface Science Pub Date : 2024-12-17 DOI: 10.1016/j.apsusc.2024.162117

Honghu Tang, Xiongxing Zhang, Yong Zeng, Zhongbao Hua, Wei Sun, Li Wang, Feng Jiang

{"title":"Robust adsorption of ellagic acid on galena surface for efficient flotation separation of molybdenite and galena","authors":"Honghu Tang, Xiongxing Zhang, Yong Zeng, Zhongbao Hua, Wei Sun, Li Wang, Feng Jiang","doi":"10.1016/j.apsusc.2024.162117","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162117","url":null,"abstract":"The efficient flotation separation of molybdenite and galena is challenging due to their similar surface chemical properties. In this study, ellagic acid (EA), a biodegradable small molecule, was investigated as a novel depressant for selectively modifying the surface chemistry of galena in its flotation separation from molybdenite. Flotation experiments revealed that EA effectively depressed galena at pH 9, while maintaining molybdenite recoveries above 90%. In artificially mixed mineral tests, molybdenum recovery in the froth exceeded 98%, while lead recovery dropped to 6.34%. Surface chemistry analyses, including zeta potential and contact angle measurements, revealed that EA preferentially adsorbed onto the galena surface, decreasing its hydrophobicity and hindering collector adsorption. Solution chemistry calculations and UV spectroscopy identified the doubly deprotonated form of EA as the dominant species at pH 9. Further insights from FT-IR, XPS, and DFT calculations confirmed that EA chemisorbs onto galena through specific deprotonated sites, forming a Pb-O-C chelate structure, which selectively modifies galena’s surface properties and enhances the wettability contrast between galena and molybdenite. These findings suggest that EA has strong potential as an environmentally friendly alternative to conventional galena depressants.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"53 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142840848","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

The effect of Cl- on CeO2-WO3/TiO2 catalyst for selective catalytic reduction of NO with NH3

IF 6.7 2区材料科学

Applied Surface Science Pub Date : 2024-12-17 DOI: 10.1016/j.apsusc.2024.162131

Yuming Yang, Xue Bian, Feng Xie, Yuting Bai

{"title":"The effect of Cl- on CeO2-WO3/TiO2 catalyst for selective catalytic reduction of NO with NH3","authors":"Yuming Yang, Xue Bian, Feng Xie, Yuting Bai","doi":"10.1016/j.apsusc.2024.162131","DOIUrl":"https://doi.org/10.1016/j.apsusc.2024.162131","url":null,"abstract":"The 30CeO2-4WO3/TiO2 catalyst was prepared utilizing cost-effective cerium chloride instead of the traditional cerium nitrate as the cerium source in this paper. The structure, physical and chemical properties, catalytic performance were characterized. The catalytic performance and N2 selectivity of the 30CeO2-4WO3/TiO2 catalyst significantly deteriorate with increased the content of Cl-. Specifically, denitration efficiency of 30CeO2-4WO3/TiO2-0.007 % exceeding 80 % and 90 % were 225 ∼ 520 °C and 241 ∼ 504 °C, respectively, whereas the maximum denitration efficiency of the 30CeO2-4WO3/TiO2-0.161 % sample was only 79.83 %. The effect mechanism of Cl- on catalytic performance was discussed. (1) XRD and BET results show that Cl- can cause the expansion of the lattice of TiO2 and CeO2, thereby increasing its crystallinity and decreasing the specific surface area. (2) Cl- interacts with NH4+ to form NH4Cl, which subsequently reacts with CeO2 to produce CeOCl, leading to the obstruction of the catalyst’s micropores. (3) XPS, NH3-TPD, and H2-TPR analyses reveal that Cl- would occupy the oxygen vacancies, impeding oxygen migration and diminishing active surface centers. (4) In-situ DRIFTs analysis demonstrates that elevated Cl- concentrations diminish NH3 adsorption capacity and facilitate nitrate species formation. The accumulation of nitrates was a primary cause of the decline in catalyst activity.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"53 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142840907","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