Journal of Natural Gas Chemistry最新文献_第8页

Fabrication of functional hollow carbon spheres with large hollow interior as active colloidal catalysts 大中空内层功能空心碳球作为活性胶体催化剂的制备

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60361-7

Qiang Sun, Guanghui Wang, Wencui Li, Xiangqian Zhang, Anhui Lu

{"title":"Fabrication of functional hollow carbon spheres with large hollow interior as active colloidal catalysts","authors":"Qiang Sun, Guanghui Wang, Wencui Li, Xiangqian Zhang, Anhui Lu","doi":"10.1016/S1003-9953(11)60361-7","DOIUrl":"10.1016/S1003-9953(11)60361-7","url":null,"abstract":"<div>In this study, we have established a facile method to synthesize functional hollow carbon spheres with large hollow interior, which can act as active colloidal catalysts. The method includes the following steps: first, hollow polymer spheres with large hollow interior were prepared using sodium oleate as the hollow core generator, and 2,4-dihydroxybenzoic acid and hexamethylene tetramine (HMT) as the polymer precursors under hydrothermal conditions; Fe3+ or Ag+ cations were then introduced into the as-prepared hollow polymer spheres through the carboxyl groups; finally, the hollow polymer spheres can be pseudomorphically converted to hollow carbon spheres during pyrolysis process, meanwhile iron or silver nanoparticles can also be formed in the carbon shell simultaneously. The structures of the obtained functional hollow carbon spheres were characterized by TEM, XRD, and TG. As an example, Ag-doped hollow carbon spheres were used as colloid catalysts which showed high catalytic activity in 4-nitrophenol reduction reaction.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 3","pages":"Pages 251-256"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60361-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56791928","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: 8

Selective catalytic reduction of NO by C2H2 over Ce-Al2O3 catalyst with rate-determining step of NO oxidation C2H2在Ce-Al2O3催化剂上选择性催化还原NO

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60373-3

Suhua Yan, Xinping Wang, Wenchen Wang, Zequn Liu, Jiahao Niu

{"title":"Selective catalytic reduction of NO by C2H2 over Ce-Al2O3 catalyst with rate-determining step of NO oxidation","authors":"Suhua Yan, Xinping Wang, Wenchen Wang, Zequn Liu, Jiahao Niu","doi":"10.1016/S1003-9953(11)60373-3","DOIUrl":"10.1016/S1003-9953(11)60373-3","url":null,"abstract":"<div>Ce-Al2O3 catalysts prepared by co-precipitation are investigated both in NO oxidation by O2 and in selective catalytic reduction of NO by C2H2 (C2H2-SCR). It is found that C2H2-SCR is initiated and controlled by NO oxidation to NO2 over Al2O3. Ce loading on Al2O3 is almost inactive for NO oxidation below 350°C, since NO2 strongly adsorbs on cerium oxide, leading to the active sites being blocked, which was characterized by temperature-programmed desorption of NO and NO2 and Fourier transform infrared spectroscopy after NO+O2 coadsorption over the samples. However, in the case of C2H2-SCR, Ce loading on Al2O3 significantly improves the reaction by accelerating the NO oxidation step in the temperature range of 250–450°C, since the nitrate species produced by NO2 adsorption is an active intermediate required by C2H2-SCR.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 3","pages":"Pages 332-338"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60373-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56792604","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: 9

Enhancement of CO2 adsorption on nanoporous chromium terephthalate (MIL-101) by amine modification 胺改性增强纳米孔对苯二甲酸铬(MIL-101)对CO2的吸附

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60374-5

Mansoor Anbia, Vahid Hoseini

引用次数: 65

Preparation of mesoporous alumina with large pore size and their supported rhenium oxide catalysts in metathesis of 1-butene and 2-butene to propene 大孔径介孔氧化铝的制备及其负载型氧化铼催化剂在1-丁烯和2-丁烯裂解制丙烯中的应用

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60376-9

Lei Sang, Sheng-Li Chen, Guimei Yuan, Zheng Zhou, Rui Li, Aicheng Chen, Min Zheng, Ju You

引用次数: 6

Preface for the Special Column of Carbon Materials for Energy Conversion 能源转换用碳材料专栏前言

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(12)60504-0

Xiulian Pan (Guest Editor)

引用次数: 0

Carbon as a hard template for nano material catalysts 碳作为纳米材料催化剂的硬模板

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60357-5

Kake Zhu , Junming Sun , He Zhang , Jun Liu , Yong Wang

{"title":"Carbon as a hard template for nano material catalysts","authors":"Kake Zhu , Junming Sun , He Zhang , Jun Liu , Yong Wang","doi":"10.1016/S1003-9953(11)60357-5","DOIUrl":"10.1016/S1003-9953(11)60357-5","url":null,"abstract":"<div>As one of the naturally abundant elements, carbon can present in different molecular structures (allotropes) and thus lead to various physical/chemical properties of carbon-based materials which have found wide applications in a variety of fields including electrochemistry, optical, adsorption and catalysis, etc. On the other hand, its different allotropes also endow carbon-based materials with various morphostructures, which have been recently explored to prepare oxides and zeolites/zeotypes with tailored structures. In this review, we mainly summarize the recent advances in using carbon materials as hard templates to synthesize structural materials. Specifically, we focus on the development in the synthetic strategies, such as endotemplating, exotemplating approaches and using carbon materials as chemical reagents for the synthesis of metal carbides or nitrides, with an emphasis laid on the control of morphostructure. Meanwhile, the applications of the obtained materials will be highlighted, especially, in the field of heterogeneous catalysis where enhanced performances have been achieved with the materials derived from carbon-templated methods.</div>","PeriodicalId":56116,"journal":{"name":"Journal of Natural Gas Chemistry","volume":"21 3","pages":"Pages 215-232"},"PeriodicalIF":0.0,"publicationDate":"2012-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1003-9953(11)60357-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"56792078","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: 39

Enhanced catalytic performance for direct synthesis of dimethyl ether from syngas over a La2O3 modified Cu-ZrO2/γ-Al2O3 hybrid catalyst La2O3修饰Cu-ZrO2/γ-Al2O3杂化催化剂对合成气直接合成二甲醚的催化性能增强

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60377-0

Zhuo Li , Jianqing Li , Cheng Yang , Jinhu Wu

引用次数: 13

Preparation of phosphorus-doped carbon nanospheres and their electrocatalytic performance for O2 reduction 掺磷碳纳米球的制备及其氧还原电催化性能研究

Journal of Natural Gas Chemistry Pub Date : 2012-05-01 DOI: 10.1016/S1003-9953(11)60362-9

Ziwu Liu , Feng Peng , Hongjuan Wang , Hao Yu , Wenxu Zheng , Xianyong Wei

引用次数: 48

Methane hydrate stability in the presence of water-soluble hydroxyalkyl cellulose 甲烷水合物在水溶性羟烷基纤维素存在下的稳定性

Journal of Natural Gas Chemistry Pub Date : 2012-03-01 DOI: 10.1016/S1003-9953(11)60343-5

M. Mohammad-Taheri , A. Zarringhalam Moghaddam , K. Nazari , N. Gholipour Zanjani

引用次数: 21

Metathesis of 1-butene and 2-butene to propene over Re2O7 supported on macro-mesoporous γ-alumina prepared via a dual template method 双模板法制备的大介孔γ-氧化铝负载Re2O7上，1-丁烯和2-丁烯合成丙烯

Journal of Natural Gas Chemistry Pub Date : 2012-03-01 DOI: 10.1016/S1003-9953(11)60340-X

Lei Sang, Sheng-Li Chen, Guimei Yuan, Min Zheng, Ju You, Aicheng Chen, Rui Li, Lanjing Chen

引用次数: 11