Catalysts最新文献_第10页

Highly Efficient PtSn/Al2O3 and PtSnZnCa/Al2O3 Catalysts for Ethane Dehydrogenation: Influence of Catalyst Pretreatment Atmosphere 用于乙烷脱氢的高效 PtSn/Al2O3 和 PtSnZnCa/Al2O3 催化剂：催化剂预处理气氛的影响

Catalysts Pub Date : 2024-05-09 DOI: 10.3390/catal14050312

Seetharamulu Podila, A. Al-zahrani, M. Daous, Hisham Alhumade

{"title":"Highly Efficient PtSn/Al2O3 and PtSnZnCa/Al2O3 Catalysts for Ethane Dehydrogenation: Influence of Catalyst Pretreatment Atmosphere","authors":"Seetharamulu Podila, A. Al-zahrani, M. Daous, Hisham Alhumade","doi":"10.3390/catal14050312","DOIUrl":"https://doi.org/10.3390/catal14050312","url":null,"abstract":"Increased demand for ethylene has motivated direct ethane dehydrogenation over Pt-based catalysts. PtSn/γ-Al2O3 and PtSnZnCa/γ-Al2O3 catalysts were investigated with the aim of understanding the effect of the pretreatment environment on the state of dispersed Pt for ethane dehydrogenation. The catalysts were prepared by the impregnation method and pretreated in different environments like static air (SA), flowing air (FA), and nitrogen (N2) atmospheres. A comprehensive characterization of the catalysts was performed using Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), Temperature-Programmed Reduction (TPR), NH3 Temperature-Programmed Desorption (NH3-TPD), X-ray photoelectron spectroscopy (XPS), and Transmission Electron Microscopy (TEM) techniques. The results reveal that the PtSn on Al2O3 catalyst pretreated in the static air environment (PtSn-SA) exhibits 21% ethylene yield with 95% selectivity at 625 °C. XPS analysis found more platinum and tin on the catalyst surface after static air treatment. The overall acidity of the catalysts decreased after thermal treatment in static air. Elemental mapping demonstrated that Pt agglomeration was pronounced in catalysts calcined under flowing air and nitrogen. These factors are responsible for the enhanced activity of the PtSn-SA catalyst compared to the other catalysts. The addition of Zn and Ca to the PtSn catalysts increases the yield of the catalyst calcined in static air (PtSnZnCa-SA). The PtSnZnCa-SA catalyst showed the highest ethylene yield of 27% with 99% selectivity and highly stable activity at 625 °C for 10 h.","PeriodicalId":505577,"journal":{"name":"Catalysts","volume":" 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140994064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Remediation of Polycyclic Aromatic Hydrocarbon-Contaminated Soil by Using Activated Persulfate with Carbonylated Activated Carbon Supported Nanoscale Zero-Valent Iron 利用活性过硫酸盐与羰基化活性炭支撑的纳米级零价铁修复受多环芳烃污染的土壤

Catalysts Pub Date : 2024-05-08 DOI: 10.3390/catal14050311

Changzhao Chen, Zhe Yuan, Shenshen Sun, Jiacai Xie, Kunfeng Zhang, Yuanzheng Zhai, Rui Zuo, Erping Bi, Yufang Tao, Quanwei Song

{"title":"Remediation of Polycyclic Aromatic Hydrocarbon-Contaminated Soil by Using Activated Persulfate with Carbonylated Activated Carbon Supported Nanoscale Zero-Valent Iron","authors":"Changzhao Chen, Zhe Yuan, Shenshen Sun, Jiacai Xie, Kunfeng Zhang, Yuanzheng Zhai, Rui Zuo, Erping Bi, Yufang Tao, Quanwei Song","doi":"10.3390/catal14050311","DOIUrl":"https://doi.org/10.3390/catal14050311","url":null,"abstract":"Soil contamination by polycyclic aromatic hydrocarbons (PAHs) has been an environmental issue worldwide, which aggravates the ecological risks faced by animals, plants, and humans. In this work, the composites of nanoscale zero-valent iron supported on carbonylated activated carbon (nZVI-CAC) were prepared and applied to activate persulfate (PS) for the degradation of PAHs in contaminated soil. The prepared nZVI-CAC catalyst was characterized by scanning electron microscopy (SEM), X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). It was found that the PS/nZVI-CAC system was superior for phenanthrene (PHE) oxidation than other processes using different oxidants (PS/nZVI-CAC > PMS/nZVI-CAC > H2O2/nZVI-CAC) and it was also efficient for the degradation of other six PAHs with different structures and molar weights. Under optimal conditions, the lowest and highest degradation efficiencies for the selected PAHs were 60.8% and 90.7%, respectively. Active SO4−• and HO• were found to be generated on the surface of the catalysts, and SO4−• was dominant for PHE oxidation through quenching experiments. The results demonstrated that the heterogeneous process using activated PS with nZVI-CAC was effective for PAH degradation, which could provide a theoretical basis for the remediation of PAH-polluted soil.","PeriodicalId":505577,"journal":{"name":"Catalysts","volume":" 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140999878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction: Zhou et al. Removal of Emerging Organic Pollutants by Zeolite Mineral (Clinoptilolite) Composite Photocatalysts in Drinking Water and Watershed Water. Catalysts 2024, 14, 216 更正：Zhou et al. 饮用水和流域水中沸石矿物（霞石）复合光催化剂对新出现的有机污染物的去除。催化剂2024，14，216

Catalysts Pub Date : 2024-05-08 DOI: 10.3390/catal14050310

Pengfei Zhou, Fei Wang, Yan-bai Shen, Xinhui Duan, Sikai Zhao, Xiangxiang Chen, Jinsheng Liang

引用次数: 0

Dehydration of Methanol to Dimethyl Ether—Current State and Perspectives 甲醇脱水制二甲醚--现状与展望

Catalysts Pub Date : 2024-05-07 DOI: 10.3390/catal14050308

L. Chmielarz

引用次数: 0

Strong and Hierarchical Ni(OH)2/Ni/rGO Composites as Multifunctional Catalysts for Excellent Water Splitting 作为多功能催化剂的强分层 Ni(OH)2/Ni/rGO 复合材料可实现优异的水分离性能

Catalysts Pub Date : 2024-05-07 DOI: 10.3390/catal14050309

Lixin Wang, Ailing Song, Yue Lu, Manman Duanmu, Zhipeng Ma, Xiujuan Qin, Guangjie Shao

引用次数: 0

Influence of Power Fluctuation on Ni-Based Electrode Degradation and Hydrogen Evolution Reaction Performance in Alkaline Water Splitting: Probing the Effect of Renewable Energy on Water Electrolysis 功率波动对碱性水分离中镍基电极降解和氢气进化反应性能的影响：探究可再生能源对水电解的影响

Catalysts Pub Date : 2024-05-06 DOI: 10.3390/catal14050307

Congying Liu, Bing-Jia Lin, Hailong Zhang, Yingying Wang, Hangzhou Wang, Junlei Tang, Caineng Zou

{"title":"Influence of Power Fluctuation on Ni-Based Electrode Degradation and Hydrogen Evolution Reaction Performance in Alkaline Water Splitting: Probing the Effect of Renewable Energy on Water Electrolysis","authors":"Congying Liu, Bing-Jia Lin, Hailong Zhang, Yingying Wang, Hangzhou Wang, Junlei Tang, Caineng Zou","doi":"10.3390/catal14050307","DOIUrl":"https://doi.org/10.3390/catal14050307","url":null,"abstract":"The combination of water electrolysis and renewable energy to produce hydrogen is a promising way to solve the climate and energy crisis. However, the fluctuating characteristics of renewable energy not only present a significant challenge to the use of water electrolysis electrodes, but also limit the development of the hydrogen production industry. In this study, the effects of three different types of waveforms (square, step, and triangle, which were used to simulate the power input of renewable energy) on the electrochemical catalysis behavior of Ni plate cathodes for HER was investigated. During the test, the HER performance of the Ni cathode increased at first and then slightly decreased. The fluctuating power led to the degradation of the Ni cathode surface, which enhanced the catalysis effect by increasing the catalytic area and the active sites. However, prolonged operation under power fluctuations could have damaged the morphology of the electrode surface and the substances comprising this surface, potentially resulting in a decline in catalytic efficiency. In addition, the electrochemical catalysis behavior of the prepared FeNiMo-LDH@NiMo/SS cathode when subjected to square-wave potential with different fluctuation amplitudes was also extensively studied. A larger amplitude of fluctuating power led to a change in the overpotential and stability of the LDH electrode, which accelerated the degradation of the cathode. This research provides a technological basis for the coupling of water electrolysis and fluctuating renewable energy and thus offers assistance to the development of the “green hydrogen” industry.","PeriodicalId":505577,"journal":{"name":"Catalysts","volume":"5 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141006192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on NH3-SCR Activity and HCl/H2O Tolerance of Titanate-Nanotube-Supported MnOx-CeO2 Catalyst at Low Temperature 低温下钛酸纳米管支撑的 MnOx-CeO2 催化剂的 NH3-SCR 活性和 HCl/H2O 耐受性研究

Catalysts Pub Date : 2024-05-05 DOI: 10.3390/catal14050306

Qiulin Wang, Feng Liu, Zhihao Wu, Jing Jin, Xiaoqing Lin, Shengyong Lu, Juan Qiu

引用次数: 0

Binuclear Dioxomolybdenum(VI) Complex Based on Bis(2-pyridinecarboxamide) Ligand as Effective Catalyst for Fuel Desulfurization 基于双(2-吡啶甲酰胺)配体的双核二氧代钼(VI)配合物作为燃料脱硫的有效催化剂

Catalysts Pub Date : 2024-05-04 DOI: 10.3390/catal14050305

Fátima Mirante, Catarina N. Dias, André M. N. Silva, Sandra Gago, Salete S. Balula

引用次数: 0

Recent Advances in the Development of Nanocarbon-Based Electrocatalytic/Electrode Materials for Proton Exchange Membrane Fuel Cells: A Review 质子交换膜燃料电池用纳米碳基电催化/电极材料的最新进展：综述

Catalysts Pub Date : 2024-05-03 DOI: 10.3390/catal14050303

A. A. Zasypkina, Nataliya A. Ivanova, D. D. Spasov, R. Mensharapov, M. Sinyakov, Sergey A. Grigoriev

引用次数: 0

Functionalized Chitosan and Alginate Composite Hydrogel-Immobilized Laccase with Sustainable Biocatalysts for the Effective Removal of Organic Pollutant Bisphenol A 功能化壳聚糖和海藻酸盐复合水凝胶-固定化漆酶与可持续生物催化剂，用于有效去除有机污染物双酚 A

Catalysts Pub Date : 2024-05-03 DOI: 10.3390/catal14050304

Hong Zhang, Xin Zhang, Lei Wang, Bo Wang, Xu Zeng, Bo Ren

{"title":"Functionalized Chitosan and Alginate Composite Hydrogel-Immobilized Laccase with Sustainable Biocatalysts for the Effective Removal of Organic Pollutant Bisphenol A","authors":"Hong Zhang, Xin Zhang, Lei Wang, Bo Wang, Xu Zeng, Bo Ren","doi":"10.3390/catal14050304","DOIUrl":"https://doi.org/10.3390/catal14050304","url":null,"abstract":"The immobilization of enzymes is an important strategy to improve their stability and reusability. Enzyme immobilization technology has broad application prospects in biotechnology, biochemistry, environmental remediation, and other fields. In this study, composites of chitosan (CS) and sodium alginate (SA) with Cu2+ forming a double-network crosslinked structure of hydrogels were prepared and used for the immobilization of laccase. Fourier infrared spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy tests revealed that laccase molecules were immobilized on the composite hydrogel surface by a covalent bonding method. Compared to free laccase, the pH, temperature, and storage stability of the immobilized laccase were markedly improved. In addition, the immobilized laccase could be easily separated from the reaction system and reused, and it maintained 81.6% of its initial viability after six cycles of use. Bisphenol A (BPA) in polluted water was efficiently degraded using immobilized laccase, and the factors affecting the degradation efficiency were analyzed. Under the optimal conditions, the BPA removal was greater than 82%, and the addition of a small amount of ABTS had a significant effect on BPA degradation, with a removal rate of up to 99.1%. Experimental results indicated that immobilized laccases had enormous potential in actual industrial applications.","PeriodicalId":505577,"journal":{"name":"Catalysts","volume":"103 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141016055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0