Applied Catalysis A: General最新文献

英文中文

Sterilization performance and mechanism evaluation of oxygen vacancies synergistic Fenton-like enhanced photocatalysts

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General

Pub Date : 2025-02-05 DOI: 10.1016/j.apcata.2024.120083

Yirui Zhao , Hongshun Hao , Jiaqi Zhong , Gongliang Zhang , Jingran Bi , Shuang Yan , Feng Hong , Hongman Hou

Foodborne pathogens have become one of the global problems threatening human life and health, and Fenton-like photocatalytic technology with nanomaterials as the core opens up a new way to eliminate pathogens. In this paper, m-WO_3-x was prepared by controlling oxygen vacancies and employing a hard template to construct a mesoporous structure, and the ternary composite N-Nb₂CT_x/TpPa-1/m-WO_3-x was successfully constructed by combining with N-Nb₂CT_x/TpPa-1. In comparison to the monomers, the ternary composite has a large specific surface area and pore volume, which enhances the light trapping ability, and greatly reduces the recombination of photogenerated electron-hole pairs. Simultaneously, the construction of oxygen vacancies can trigger the localized surface plasmon resonance effect, thereby broadening the spectral response range and enhancing the photothermal effect. The photocatalytic sterilization efficiency of oxygen vacancies synergistic Fenton-like was the highest when 2 mM of H₂O₂ was added, and the cell concentration decreased from 7.14 to 3.26 log₁₀CFU/mL. The establishment of N-Nb₂CT_x/TpPa-1/m-WO_3-x Fenton-like photocatalysts will provide a theoretical basis for reducing the spread of foodborne pathogens.

{"title":"Sterilization performance and mechanism evaluation of oxygen vacancies synergistic Fenton-like enhanced photocatalysts","authors":"Yirui Zhao , Hongshun Hao , Jiaqi Zhong , Gongliang Zhang , Jingran Bi , Shuang Yan , Feng Hong , Hongman Hou","doi":"10.1016/j.apcata.2024.120083","DOIUrl":"10.1016/j.apcata.2024.120083","url":null,"abstract":"<div><div>Foodborne pathogens have become one of the global problems threatening human life and health, and Fenton-like photocatalytic technology with nanomaterials as the core opens up a new way to eliminate pathogens. In this paper, m-WO3-x was prepared by controlling oxygen vacancies and employing a hard template to construct a mesoporous structure, and the ternary composite N-Nb2CTx/TpPa-1/m-WO3-x was successfully constructed by combining with N-Nb2CTx/TpPa-1. In comparison to the monomers, the ternary composite has a large specific surface area and pore volume, which enhances the light trapping ability, and greatly reduces the recombination of photogenerated electron-hole pairs. Simultaneously, the construction of oxygen vacancies can trigger the localized surface plasmon resonance effect, thereby broadening the spectral response range and enhancing the photothermal effect. The photocatalytic sterilization efficiency of oxygen vacancies synergistic Fenton-like was the highest when 2 mM of H2O2 was added, and the cell concentration decreased from 7.14 to 3.26 log10CFU/mL. The establishment of N-Nb2CTx/TpPa-1/m-WO3-x Fenton-like photocatalysts will provide a theoretical basis for reducing the spread of foodborne pathogens.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"691 ","pages":"Article 120083"},"PeriodicalIF":4.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135079","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}

引用次数: 0

Catalytic performance of low loading palladium-carbon catalyst in rosin disproportionation: Characterization, process enhancement, and reaction pathway

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General

Pub Date : 2025-02-05 DOI: 10.1016/j.apcata.2024.120077

Yifan Niu , Siyu Gong , Jinhao Zheng , Xian Zhou , Ziyu Song , Shaohua Ju , Yongwan Gu

This study introduces an efficient Pd/C catalyst for the rosin disproportionation (RD) reaction, a key biomass conversion process. The low-loaded Pd/C catalysts, with 3–6 nm Pd nanoparticles, were synthesized via deposition-precipitation and characterized for their high dispersion of metallic Pd on activated carbon. Optimized using the Box-Behnken design of response surface methodology, the catalyst achieved a 71.36 % maximum DAA yield under optimal conditions (280 °C, 150 min, 0.04 wt% catalyst, 3.00 wt% Pd), surpassing commercial catalysts by 1.27 times with reduced Pd usage. Key factors for catalytic activity included Pd loading, dispersion, particle size, and metallic Pd content. Kinetic studies showed an activation energy of 21.52 kJ/mol for the conversion of abietic acid to dehydroabietic acid, highlighting the superior potential in the RD reaction. Ultraviolet-visible absorption spectra and gas chromatography-mass spectrometry analyses elucidated the reaction pathway and mechanism, providing a practical approach to developing high-activity catalysts for industrial RD applications.

{"title":"Catalytic performance of low loading palladium-carbon catalyst in rosin disproportionation: Characterization, process enhancement, and reaction pathway","authors":"Yifan Niu , Siyu Gong , Jinhao Zheng , Xian Zhou , Ziyu Song , Shaohua Ju , Yongwan Gu","doi":"10.1016/j.apcata.2024.120077","DOIUrl":"10.1016/j.apcata.2024.120077","url":null,"abstract":"<div><div>This study introduces an efficient Pd/C catalyst for the rosin disproportionation (RD) reaction, a key biomass conversion process. The low-loaded Pd/C catalysts, with 3–6 nm Pd nanoparticles, were synthesized via deposition-precipitation and characterized for their high dispersion of metallic Pd on activated carbon. Optimized using the Box-Behnken design of response surface methodology, the catalyst achieved a 71.36 % maximum DAA yield under optimal conditions (280 °C, 150 min, 0.04 wt% catalyst, 3.00 wt% Pd), surpassing commercial catalysts by 1.27 times with reduced Pd usage. Key factors for catalytic activity included Pd loading, dispersion, particle size, and metallic Pd content. Kinetic studies showed an activation energy of 21.52 kJ/mol for the conversion of abietic acid to dehydroabietic acid, highlighting the superior potential in the RD reaction. Ultraviolet-visible absorption spectra and gas chromatography-mass spectrometry analyses elucidated the reaction pathway and mechanism, providing a practical approach to developing high-activity catalysts for industrial RD applications.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"691 ","pages":"Article 120077"},"PeriodicalIF":4.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135099","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}

引用次数: 0

Turning CO2 into an alternative energy source: Study on methanation reaction optimization

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General

Pub Date : 2025-02-05 DOI: 10.1016/j.apcata.2024.120073

Apisara Supaokit , Vikas Verma , Wei-Cheng Wang , Chia-Lin Chen , Shun-Min Wang , Rusdan Aditya Aji Nugroho , Viet Dung Duong , Hsin-Wei Hsu

Carbon dioxide (CO₂) methanation is an effective technology for mitigating CO₂ emissions, major contributor to global warming, by converting CO₂ into methane (CH₄). This work describes use of CO₂ (feedstock) using molecular hydrogen to produce CH₄ using mono-metallic Ni/γ-Al₂O₃ catalyst in continuous flow fixed bed downflow reactor. The catalyst was characterized by XRD, SEM, BET, H₂-TPD, H₂-TPR, TPO, and Raman techniques. The influence of temperature, gas hourly space velocity (GHSV), pressure, H₂/feed, nickel content and calcination temperature were studied. Optimal conditions using Taguchi method yielded maximum CH₄ selectivity (100 %) at T = 350 ºC, GHSV = 5000 mL g_cat⁻¹ h⁻¹_, P = 15 bar, and H₂/feed = 5. Under industrial reduced conditions (300 °C, 4000 mL g_cat⁻¹ h⁻¹, 1 bar, and 4.5), CO₂ conversion improved from 73.67 % to 92.84 % using optimum 15 wt% Ni catalyst and 600 °C calcination temperature. The catalyst maintained ∼90 % CO₂ conversion over 100 h without deactivation.

{"title":"Turning CO2 into an alternative energy source: Study on methanation reaction optimization","authors":"Apisara Supaokit , Vikas Verma , Wei-Cheng Wang , Chia-Lin Chen , Shun-Min Wang , Rusdan Aditya Aji Nugroho , Viet Dung Duong , Hsin-Wei Hsu","doi":"10.1016/j.apcata.2024.120073","DOIUrl":"10.1016/j.apcata.2024.120073","url":null,"abstract":"<div><div>Carbon dioxide (CO2) methanation is an effective technology for mitigating CO2 emissions, major contributor to global warming, by converting CO2 into methane (CH4). This work describes use of CO2 (feedstock) using molecular hydrogen to produce CH4 using mono-metallic Ni/γ-Al2O3 catalyst in continuous flow fixed bed downflow reactor. The catalyst was characterized by XRD, SEM, BET, H2-TPD, H2-TPR, TPO, and Raman techniques. The influence of temperature, gas hourly space velocity (GHSV), pressure, H2/feed, nickel content and calcination temperature were studied. Optimal conditions using Taguchi method yielded maximum CH4 selectivity (100 %) at T = 350 ºC, GHSV = 5000 mL gcat−1 h−1, P = 15 bar, and H2/feed = 5. Under industrial reduced conditions (300 °C, 4000 mL gcat−1 h−1, 1 bar, and 4.5), CO2 conversion improved from 73.67 % to 92.84 % using optimum 15 wt% Ni catalyst and 600 °C calcination temperature. The catalyst maintained ∼90 % CO2 conversion over 100 h without deactivation.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"691 ","pages":"Article 120073"},"PeriodicalIF":4.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135250","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}

引用次数: 0

Highly efficient in-situ hydrogen generation from Al-ethanol reaction using NiCu bimetallic nanoparticles as catalysts

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General

Pub Date : 2025-02-05 DOI: 10.1016/j.apcata.2024.120062

Xinyue Wang , Junyan Guo , Shaowei Zhang , Long Dong , Hongjuan Duan , Haijun Zhang , Liang Huang , Quanli Jia

Hydrogen and Al₂O₃ supported NiCu alloy bimetallic nanoparticle (NP) catalysts were simultaneously prepared through Al-ethanol reaction with a mixed dispersion of Al powders, ethanol, nickel chloride hexahydrate, copper chloride dihydrate and aluminum chloride hexahydrate. The addition of Cu improved the dispersion of Ni and enhanced antioxidation ability. The Ni₈₀Cu₂₀ NPs demonstrated an outstanding in-situ hydrogen production performance with a hydrogen yield of 97 % and a generation rate of 85 mL-H₂-min⁻¹-g-Al⁻¹, which was 1.1 and 3.4 times compared to that of monometallic Ni and Cu NPs. Moreover, the ethylene selectivity of Al₂O₃ supported Ni₈₀Cu₂₀ NPs catalysts synthesized via subsequently freeze-drying the products from the Al-ethanol reaction, was 2 and 8 times higher than that of monometallic counterpart samples. This synergistic effect between the metals altered both the geometric and electronic properties of the catalyst. Furthermore, compared to Pd-based catalysts, the Ni₈₀Cu₂₀/Al₂O₃ catalyst exhibited comparable ethylene selectivity for the semi-hydrogenation of acetylene.

{"title":"Highly efficient in-situ hydrogen generation from Al-ethanol reaction using NiCu bimetallic nanoparticles as catalysts","authors":"Xinyue Wang , Junyan Guo , Shaowei Zhang , Long Dong , Hongjuan Duan , Haijun Zhang , Liang Huang , Quanli Jia","doi":"10.1016/j.apcata.2024.120062","DOIUrl":"10.1016/j.apcata.2024.120062","url":null,"abstract":"<div><div>Hydrogen and Al2O3 supported NiCu alloy bimetallic nanoparticle (NP) catalysts were simultaneously prepared through Al-ethanol reaction with a mixed dispersion of Al powders, ethanol, nickel chloride hexahydrate, copper chloride dihydrate and aluminum chloride hexahydrate. The addition of Cu improved the dispersion of Ni and enhanced antioxidation ability. The Ni80Cu20 NPs demonstrated an outstanding in-situ hydrogen production performance with a hydrogen yield of 97 % and a generation rate of 85 mL-H2-min−1-g-Al−1, which was 1.1 and 3.4 times compared to that of monometallic Ni and Cu NPs. Moreover, the ethylene selectivity of Al2O3 supported Ni80Cu20 NPs catalysts synthesized via subsequently freeze-drying the products from the Al-ethanol reaction, was 2 and 8 times higher than that of monometallic counterpart samples. This synergistic effect between the metals altered both the geometric and electronic properties of the catalyst. Furthermore, compared to Pd-based catalysts, the Ni80Cu20/Al2O3 catalyst exhibited comparable ethylene selectivity for the semi-hydrogenation of acetylene.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"691 ","pages":"Article 120062"},"PeriodicalIF":4.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143134984","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}

引用次数: 0

Low-nuclearity Pt sites directionally deposited on CeZrOx interface for breaking “trade-off” limitation in low-temperature RWGS reaction

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General

Pub Date : 2025-02-05 DOI: 10.1016/j.apcata.2024.120094

Fuying Huang , Jie Chen , Jianpeng Zeng , Fengying Zheng , Yancai Li , Jian Qi , Shunxing Li

The reverse water-gas shift (RWGS) reaction is considered as one of the promising routes for converting greenhouse gases into CO intermediates and subsequently generating high-value products. However, CO₂ is difficult to activate at low temperatures and tends to form by-product CH₄, resulting in poor conversion and selectivity. In this work, a targeted strategy was developed to oriented deposite Pt components on in-situ constructed CeZrO_x interfaces. Due to the dispersion and anchoring effect derived from the oxygen vacancies of the CeZrO_x interface, the supported Pt sites were dominantly existed as low-nuclearity configuration. Moreover, the defect-enriched interface showed exceptional electron donation to Pt sites (Pt^δ- species) via an electronic metal-support interaction (EMSI), which was endowed with stronger H dissociation properties. Combined with the superior ability for the activation of CO₂ over oxygen vacancies at CeZrO_x interface, the catalytic performance of low-temperature RWGS reaction was synergistically improved.

{"title":"Low-nuclearity Pt sites directionally deposited on CeZrOx interface for breaking “trade-off” limitation in low-temperature RWGS reaction","authors":"Fuying Huang , Jie Chen , Jianpeng Zeng , Fengying Zheng , Yancai Li , Jian Qi , Shunxing Li","doi":"10.1016/j.apcata.2024.120094","DOIUrl":"10.1016/j.apcata.2024.120094","url":null,"abstract":"<div><div>The reverse water-gas shift (RWGS) reaction is considered as one of the promising routes for converting greenhouse gases into CO intermediates and subsequently generating high-value products. However, CO2 is difficult to activate at low temperatures and tends to form by-product CH4, resulting in poor conversion and selectivity. In this work, a targeted strategy was developed to oriented deposite Pt components on in-situ constructed CeZrOx interfaces. Due to the dispersion and anchoring effect derived from the oxygen vacancies of the CeZrOx interface, the supported Pt sites were dominantly existed as low-nuclearity configuration. Moreover, the defect-enriched interface showed exceptional electron donation to Pt sites (Ptδ- species) via an electronic metal-support interaction (EMSI), which was endowed with stronger H dissociation properties. Combined with the superior ability for the activation of CO2 over oxygen vacancies at CeZrOx interface, the catalytic performance of low-temperature RWGS reaction was synergistically improved.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"691 ","pages":"Article 120094"},"PeriodicalIF":4.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135083","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}

引用次数: 0

Highly dispersed Pd-nanoparticles in vanadium oxide supported zeolite-Y for C-C coupling reaction through C-Cl bond activation

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General

Pub Date : 2025-02-05 DOI: 10.1016/j.apcata.2024.120053

Tonmoy J. Bora , Nand K. Gour , Lakshi Saikia , Unnati Bora , Nitumoni Hazarika , Donguk Kim , Young-Bin Park , Rafikul Ali Saha , Arpita Devi , Galla V. Karunakar , Magdi E.A. Zaki , Kusum K. Bania

The current study provided evidence on the contribution of the Lewis acid center (V^4 +/V⁵⁺) at the aluminosilicate framework in facilitating the C-Cl bond activation during the Suzuki Miyaura cross-coupling (SMCC) reaction. To accomplish such process five catalysts with different palladium (Pd) to vanadium (V) ratios were synthesized on zeolite-Y and were duly characterized. The formation of low dimensional Pd nanoparticles (1–4 nm) on vanadium oxide supported zeolite-Y (VO_x-Y) and the Pd/V ratio was found to be dependent on the type of amino acids (proline, cysteine, serine, and threonine) used during synthesis. Particularly, the presence of thiol group in cysteine helped in stabilizing the Pd nanoparticles, while zeolite-Y, being a hard templating agent, controlled their fine distribution. Lewis acid sites V⁴⁺/V⁵⁺ created at the aluminosilicate framework helped in weakening the C-Cl bond of aryl chloride through Vⁿ⁺---Cl (n = 4,5) interaction which was proved by the Density Functional Theory (DFT) calculations and experimentally through Raman studies. The cysteine-modified zeolite-Y supported Pd/PdO-VO_x-Y_Cys catalyst activated the C-Cl bond of aryl chlorides, resulting in high % yield (up to 93 %) of the biaryls with large substrate scopes. The Pd and V loading, Pd/V, Pd⁰/Pd²⁺, V⁵⁺/V⁴⁺ ratios, and the interaction of Pd and V highly influenced the activity of the catalysts.

{"title":"Highly dispersed Pd-nanoparticles in vanadium oxide supported zeolite-Y for C-C coupling reaction through C-Cl bond activation","authors":"Tonmoy J. Bora , Nand K. Gour , Lakshi Saikia , Unnati Bora , Nitumoni Hazarika , Donguk Kim , Young-Bin Park , Rafikul Ali Saha , Arpita Devi , Galla V. Karunakar , Magdi E.A. Zaki , Kusum K. Bania","doi":"10.1016/j.apcata.2024.120053","DOIUrl":"10.1016/j.apcata.2024.120053","url":null,"abstract":"<div><div>The current study provided evidence on the contribution of the Lewis acid center (V4 +/V5+) at the aluminosilicate framework in facilitating the C-Cl bond activation during the Suzuki Miyaura cross-coupling (SMCC) reaction. To accomplish such process five catalysts with different palladium (Pd) to vanadium (V) ratios were synthesized on zeolite-Y and were duly characterized. The formation of low dimensional Pd nanoparticles (1–4 nm) on vanadium oxide supported zeolite-Y (VOx-Y) and the Pd/V ratio was found to be dependent on the type of amino acids (proline, cysteine, serine, and threonine) used during synthesis. Particularly, the presence of thiol group in cysteine helped in stabilizing the Pd nanoparticles, while zeolite-Y, being a hard templating agent, controlled their fine distribution. Lewis acid sites V4+/V5+ created at the aluminosilicate framework helped in weakening the C-Cl bond of aryl chloride through Vn+---Cl (n = 4,5) interaction which was proved by the Density Functional Theory (DFT) calculations and experimentally through Raman studies. The cysteine-modified zeolite-Y supported Pd/PdO-VOx-YCys catalyst activated the C-Cl bond of aryl chlorides, resulting in high % yield (up to 93 %) of the biaryls with large substrate scopes. The Pd and V loading, Pd/V, Pd0/Pd2+, V5+/V4+ ratios, and the interaction of Pd and V highly influenced the activity of the catalysts.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"691 ","pages":"Article 120053"},"PeriodicalIF":4.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135097","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}

引用次数: 0

Degradation of emerging pollutant CBZ by a novel hydrogen-promoted Fenton system constructed with Pd/UiO-66(Zr)-2OH

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General

Pub Date : 2025-02-05 DOI: 10.1016/j.apcata.2024.120065

Xin-Hao Shen , Feng Liu , Qin-Qin Chen , Ying Gao , Xiao-Wen Wang , Xin Liu

The efficient degradation of emerging pollutants in water, represented by CBZ, is receiving increasing attention from all sectors of society. Although advanced oxidation reactions represented by Fenton reaction can efficiently degrade emerging pollutants, the problem of iron sludge that comes with it is hindering the further promotion of this technology. Herein, UiO-66(Zr)-2OH material was synthesized by hydrothermal method and loaded with Pd⁰ NPs on the surface of the material by in situ reduction. The MOFs-H₂-Accelerated Catalytic Fenton system was constructed by accelerating the regeneration of Fe(II) in the system by activating the [H] produced by H₂ introduced into the system at room temperature and pressure. Within 180 min, the removal of the target pollutant CZB could reach more than 99 % under the condition of only 25 µmol of Fe(II) and 25 mmol of H₂O₂.

引用次数: 0

Synthesis of NiMn-LDHs from spent manganate lithium batteries for efficient ozone decomposition in humid environment

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General

Pub Date : 2025-02-05 DOI: 10.1016/j.apcata.2024.120078

Hongyang Jin, Xin Min, Zhen Li, Ke Chen, Lei Zhong, Songjian Zhao

Aiming to address the issues of ozone pollution and the more difficult disposal of employed lithium batteries, a novel nickel-manganese layered double hydroxide catalyst (Ni-MLB-LDH) was prepared by utilizing the spent manganate lithium battery (MLB) leaching solution as a raw material and applied to the treatment of ozone pollution. Ni-MLB-LDH has an ultra-high specific surface area (130.3 m²/g), smaller grain size and more defect sites than pure NiMn-LDH. Stability testing at RH= 60 % consistently maintained a high decomposition efficiency of over 99 %. XPS and EPR confirmed that Ni-MLB-LDH exhibited more surface oxygen vacancies, which plays a vital role in ozone decomposition. Additionally, incorporating an appropriate proportion of copper into NiMn-LDH can significantly enhance its catalytic activity, whereas doping with aluminium would decrease its catalytic activity. This method provides an emerging route for the resource utilization of spent MLBs and the synthesis of NiMn-LDH.

引用次数: 0

Oligomerization of ethylene to linear α-olefins catalyzed by Versailles/Santa Barbara-1 with LiAlH4

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General

Pub Date : 2025-02-05 DOI: 10.1016/j.apcata.2024.120085

Cong Wang, Gang Li, Zheng Huang, Anfeng Peng

Alkyl-aluminum, which is sensitive to air, has been a major obstacle to the development of ethylene oligomerization. Herein, LiAlH₄ is used as an effective alkyl-aluminum substitute. The performance of LiAlH₄ itself in the reaction is investigated, proving that it possesses moderate activity. Further addition of Versailles/Santa Barbara-1 (VSB-1) catalysts with different morphologies can effectively improve the reaction, in which VSB-1/LiAlH₄ presents the activity of 32.1 g_‧g_LiAlH4⁻¹·h⁻¹ (154.1 g_‧g_VSB-1⁻¹‧h⁻¹) and the selectivity of 1-butene, 1-hexene and 1-octene in all products could reach 51.4 %, 18.9 % and 7.9 %, respectively. The co-catalytic system is stable and the VSB-1 catalyst therein can be effectively reused at least three times under the suitable treatment conditions. In addition, the product analysis of the co-catalyzed system reveals that the addition of VSB-1 catalyst tended to produce 1-butene, 1-hexene and 1-octene at 20 bar. Based on above result, a possible reaction mechanism is proposed.

{"title":"Oligomerization of ethylene to linear α-olefins catalyzed by Versailles/Santa Barbara-1 with LiAlH4","authors":"Cong Wang, Gang Li, Zheng Huang, Anfeng Peng","doi":"10.1016/j.apcata.2024.120085","DOIUrl":"10.1016/j.apcata.2024.120085","url":null,"abstract":"<div><div>Alkyl-aluminum, which is sensitive to air, has been a major obstacle to the development of ethylene oligomerization. Herein, LiAlH4 is used as an effective alkyl-aluminum substitute. The performance of LiAlH4 itself in the reaction is investigated, proving that it possesses moderate activity. Further addition of Versailles/Santa Barbara-1 (VSB-1) catalysts with different morphologies can effectively improve the reaction, in which VSB-1/LiAlH4 presents the activity of 32.1 g‧gLiAlH4−1·h−1 (154.1 g‧gVSB-1−1‧h−1) and the selectivity of 1-butene, 1-hexene and 1-octene in all products could reach 51.4 %, 18.9 % and 7.9 %, respectively. The co-catalytic system is stable and the VSB-1 catalyst therein can be effectively reused at least three times under the suitable treatment conditions. In addition, the product analysis of the co-catalyzed system reveals that the addition of VSB-1 catalyst tended to produce 1-butene, 1-hexene and 1-octene at 20 bar. Based on above result, a possible reaction mechanism is proposed.</div></div>","PeriodicalId":243,"journal":{"name":"Applied Catalysis A: General","volume":"691 ","pages":"Article 120085"},"PeriodicalIF":4.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143135269","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}

引用次数: 0

Nano-Ru deposited on titanium dioxide as effective photocatalyst for synthesis of cyclic ketals for application as fuel biocomponents

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General

Pub Date : 2025-02-05 DOI: 10.1016/j.apcata.2024.120066

Maciej Kapkowski , Daniel Lach , Tomasz Siudyga , Karina Kocot , Sonia Kotowicz , Mateusz Korzec , Piotr Bartczak , Katarzyna Balin , Maciej Zubko , Grzegorz Dercz , Izabela Matuła , Adrianna Chojnowska , Wojciech Kujawski , Guoqiang Li , Ewelina Kusiak-Nejman , Jaroslaw Polanski

We designed and synthesized the 1–4 % Ru/TiO₂ system as a cost-efficient acetalization catalyst for polyol-ketone reactants without the additional acidic or organic co-solvent addition. The catalyst was characterized using EDXRF, XPS, XRD, TEM, UV-Vis/DR and TOF-SIMS techniques. The 2 % Ru/TiO₂ catalyst proved to be the most active in a model reaction with photo assistance, exhibiting the highest TON value of 5272. This outcome underscores the synergistic activation achieved by combining ruthenium and titania. More detailed analysis reveals a dual mechanism, wherein photocatalytic oxygen vacancy formation in TiO₂ plays a crucial role. This mechanism involves the continuous vacancy feeding by the reactant oxygen. Additionally, we tested the selected cyclic ketals as the 95-octane gasoline additives as bio-additives, aligning with current legal regulations and contributing to a reduced carbon footprint.

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