您的检索：
学者姓名：叶青
精炼检索结果：
年份
成果类型
收录类型
来源
综合
合作者
语言
清除所有精炼条件
摘要 ：
Sodium (Na) and potassium (K) are frequently encountered alkali metals in industrial exhaust gases, and their presence can significantly diminish the catalytic performance of the catalyst during the NH3-SCR reaction. Here, we prepared a catalyst using layered montmorillonite clay pillared with manganese and iron (termed Mn-Fe-PILC) as well as its niobium-modified counterpart (referred to as Nb/Mn-Fe-PILC). Furthermore, additional samples denoted as Mn-Fe-PILC-M and Nb/Mn-Fe-PILC-M (where M = Na or K) were synthesized using the impregnation method with a nitrate aqueous solution of Na or K. The results revealed an obvious enhancement in the catalytic activity of NH3-SCR upon the inclusion of Nb, with the best catalyst achieving a NOx conversion rate of 95% at 300 degrees C. Moreover, the resistance of the Mn-Fe-PILC catalyst to alkali metals was notably increased. Subsequent characterization demonstrated that the introduction of Nb to Mn-Fe-PILC led to an increase in the quantity of tetravalent manganese species present on the catalyst, alteration in reducibility, and augmentation in the number of acid sites, thereby enhancing the catalyst's resistance to alkali metals. Furthermore, in situ DRIFTS experiments revealed that the modification with Nb resulted in an amplified adsorption capacity for ammonia or nitric oxide, particularly influencing the formation of ammonia intermediates and nitrate species. These alterations proved beneficial in bolstering the alkali metal resistance of the catalyst.
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Wang, Xinpeng , Qu, Chao , Liu, Wenyi et al. Nb-Modified Mn-Fe-PILC Catalyst with Improved Resistance to Alkali Metals for the NH3-Selective Catalytic Reduction Reaction [J]. | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH , 2024 , 63 (29) : 12815-12824 . |
| MLA | Wang, Xinpeng et al. "Nb-Modified Mn-Fe-PILC Catalyst with Improved Resistance to Alkali Metals for the NH3-Selective Catalytic Reduction Reaction" . | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH 63 . 29 (2024) : 12815-12824 . |
| APA | Wang, Xinpeng , Qu, Chao , Liu, Wenyi , Meng, Fanwei , Yang, Fan , Zhang, Xin et al. Nb-Modified Mn-Fe-PILC Catalyst with Improved Resistance to Alkali Metals for the NH3-Selective Catalytic Reduction Reaction . | INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH , 2024 , 63 (29) , 12815-12824 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
xPtSSG (xPtSmCoO3/SBA-15/GO, x = 0.37, 0.83 and 0.88) was prepared via deposition-precipitation and polyvinyl alcohol-protected reduction method, and the catalytic activity was evaluated by the CO conversion of water gas shift (WGS). The crystal structure and physicochemical properties of the catalysts were evaluated by numerous techniques. Pt species were present as single atoms or/and nanoparticles over xPtSSG samples. Graphene oxide (GO) as an electron transfer bridge could significantly strengthen the strong metal-support interaction (SMSI) between Pt and SSG, thus significantly enhancing catalytic activity. Among all the samples, the lower Pt-loading single atom Pt 0.37PtSSG sample had the highest specific rate (0.84 molCO gPt -1) and TOF (4.5 x 10-2 s-1 at 250 degrees C), which may be due to the higher oxidation state of Pt species (3.39) via Co-PtOx, high Oads/ Olat molar ratio and good low-temperature reducibility. The DRIFTS demonstrates that CO2 was produced by the redox mechanism between CO and oxygen species over single atom Pt 0.37PtSSG catalyst. However, CO reacted with OH by associative mechanism to produce formate or carboxylate intermediates over the nano-Pt 0.88PtSSG sample. By DFT calculation of CO adsorption over the (02 0) crystal plane of perovskite, the adsorption energy on Pt single atoms was significantly lower than that of Pt nanoparticles, thus confirming the catalytic activity of Pt single atoms was higher than that of Pt nanoparticles. This work provides an effective approach to designing a high-performance catalyst for water gas shift reaction.
关键词 ：
Pt Pt Water gas shift Water gas shift Perovskite Perovskite Single atom catalysts Single atom catalysts
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Xiao, Yang , Qu, Chao , Chen, Xi et al. Efficient water gas shift reaction by a novel Pt single atoms anchored on SBA-15-derived SmCoO3/GO catalyst [J]. | CHEMICAL ENGINEERING JOURNAL , 2024 , 488 . |
| MLA | Xiao, Yang et al. "Efficient water gas shift reaction by a novel Pt single atoms anchored on SBA-15-derived SmCoO3/GO catalyst" . | CHEMICAL ENGINEERING JOURNAL 488 (2024) . |
| APA | Xiao, Yang , Qu, Chao , Chen, Xi , Wang, Wenjin , Zheng, Xuelong , Ye, Qing . Efficient water gas shift reaction by a novel Pt single atoms anchored on SBA-15-derived SmCoO3/GO catalyst . | CHEMICAL ENGINEERING JOURNAL , 2024 , 488 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The mesoporous alumina-supported alkaline earth metal 5 M/MA (MA = mesoporous alumina, M =Mg, Ca, Sr, and Ba) and x Mg/MA ( x =1, 3, 5, and 7 wt%) adsorbents were synthesized via evaporation-induced self-assembly (EISA) and impregnation method. The adsorption properties of CO 2 were evaluated by thermal gravimetric analyzer to focus on exploring the dynamic adsorption process of the prepared adsorbents. Loading alkaline earth metals mainly enhanced the basic sites of these adsorbents, and the alkaline sites played an extremely critical role in determining the amount of CO 2 adsorbed. Of all the adsorbents prepared, 5Mg/MA exhibited the highest adsorption uptake (1.08 mmol/g), a 2.16-fold enhancement compared to MA (0.50 mmol/g). In -situ DRIFTS indicated that CO 2 primarily existed in the form of carbonate species, and the analysis of adsorption kinetics elucidated that the adsorption process was predominantly chemisorbed, with external diffusion being the main process of adsorption. Simultaneously, based on DFT calculations, it has been found that Mg-loaded MA has a higher affinity for CO 2 compared to MA, which providing a good explanation for the experimental results. Furthermore, the 5 Mg/MA adsorbent not only exhibited excellent adsorption capacity, but also maintained excellent cyclic stability after 10 adsorption and desorption cycle runs, making it a highly favorable option for capturing CO 2 .
关键词 ：
CO2 adsorption CO2 adsorption Alkaline earth metal Alkaline earth metal Adsorption kinetics Adsorption kinetics Mesoporous alumina Mesoporous alumina
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Wang, Lanyang , Qu, Chao , Meng, Fanwei et al. Enhancement of carbon dioxide adsorption performance on mesoporous alumina modified with alkaline earth metals [J]. | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS , 2024 , 690 . |
| MLA | Wang, Lanyang et al. "Enhancement of carbon dioxide adsorption performance on mesoporous alumina modified with alkaline earth metals" . | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 690 (2024) . |
| APA | Wang, Lanyang , Qu, Chao , Meng, Fanwei , Yang, Fan , Ye, Qing . Enhancement of carbon dioxide adsorption performance on mesoporous alumina modified with alkaline earth metals . | COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS , 2024 , 690 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Pt/CeO2 were synthesized through the polyvinyl alcohol (PVA) reduction protection method, and the efficacies of the catalysts for water gas shift (WGS) reaction were evaluated. Pt was deposited on CeO2 in different forms of Pt single atoms (0.15Pt1/CeO2) and Pt nanoparticles (0.56Pt/CeO2), respectively. CO conversion (400 degrees C) and turnover frequency (TOF) (250 degrees C) of the Pt single atom catalyst 0.15Pt1/CeO2 were 89% and 0.85 s-1, respectively, significantly higher than that of the Pt nanoparticle catalyst 0.56Pt/CeO2 for the WGS reaction. The superior catalytic performance Pt single atom catalyst can be attributed to enhanced low-temperature reducibility and increased oxygen vacancies facilitated. In-situ diffuse reflectance infrared Fourier transform spectroscopy (in-DRIFTS) revealed that Pt single atoms promoted the creation of oxygen vacancies on CeO2, which dissociated H2O to H2 and adsorbed O, that subsequently interacted with the weakly adsorbed CO on these Pt sites to generate CO2. In contrast, the adsorption strength of CO nanoparticles Pt was much higher. CO reacted with the OH groups on the Pt nanoparticle catalyst surface to form formate species, which then decomposed to produce both CO2 and H2. This study presents a promising strategy for designing highly efficient catalysts tailored for WGS.
关键词 ：
Platinum Platinum Water gas shift reaction Water gas shift reaction Single atom catalyst Single atom catalyst Cerium dioxide Cerium dioxide
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Chen, Xi , Qu, Chao , Xiao, Yang et al. Enhanced water gas shift reaction by CeO2 anchored Pt single atom catalyst [J]. | CATALYSIS TODAY , 2024 , 434 . |
| MLA | Chen, Xi et al. "Enhanced water gas shift reaction by CeO2 anchored Pt single atom catalyst" . | CATALYSIS TODAY 434 (2024) . |
| APA | Chen, Xi , Qu, Chao , Xiao, Yang , Wang, Wenjin , Zhang, Jingjing , Zheng, Xuelong et al. Enhanced water gas shift reaction by CeO2 anchored Pt single atom catalyst . | CATALYSIS TODAY , 2024 , 434 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
NiCuFe layered double oxide (LDO) catalysts were synthesized using co-precipitation, impregnation, and urea hydrothermal methods. The NH3-SCR activity of NiCuFe-LDO catalysts was investigated to determine the effect of different synthesis methods. All NiCuFe-LDO samples exhibited good catalytic performance at low temperatures, with the sample synthesized using the urea hydrothermal method (NiCuFe-LDO-3) being the most efficient catalyst. The NiCuFe-LDO-3 catalyst achieved over 80% NO conversion in the temperature range of 180(degrees)C to 280 C-degrees, with a peak of 95.13% at 240(degrees)C. The physicochemical properties of the samples were systematically characterized using XRD, SEM, BET, NH3-TPD, H-2-TPR, XPS, and in-situ DRIFTS. The results showed that the NiCuFe-LDO-3 sample had the best crystallinity, as demonstrated by XRD and SEM. BET analysis revealed that the NiCuFe-LDO-3 sample had the largest specific surface area. The NiCuFe-LDO-3 sample was found to have more acidic sites and a better redox capacity than the other samples, according to the H-2-TPR and NH3-TPD results. In-situ DRIFTS analysis showed that the catalyst operates through both E-R and L-H reaction mechanisms.
关键词 ：
NH3-SCR NH3-SCR Urea Hydrothermal Urea Hydrothermal Heterogeneous catalysis Heterogeneous catalysis LDO LDO NiCuFeOx NiCuFeOx
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Yang, Fan , Wang, Xinpeng , Qu, Chao et al. Boosting NO removal performance of selective catalytic reduction with NH3 on hydrotalcite derived NiCuFe mixed oxides synthesized via urea hydrothermal method [J]. | REACTION KINETICS MECHANISMS AND CATALYSIS , 2024 , 137 (3) : 1435-1454 . |
| MLA | Yang, Fan et al. "Boosting NO removal performance of selective catalytic reduction with NH3 on hydrotalcite derived NiCuFe mixed oxides synthesized via urea hydrothermal method" . | REACTION KINETICS MECHANISMS AND CATALYSIS 137 . 3 (2024) : 1435-1454 . |
| APA | Yang, Fan , Wang, Xinpeng , Qu, Chao , Meng, Fanwei , Liu, Wenyi , Ye, Qing . Boosting NO removal performance of selective catalytic reduction with NH3 on hydrotalcite derived NiCuFe mixed oxides synthesized via urea hydrothermal method . | REACTION KINETICS MECHANISMS AND CATALYSIS , 2024 , 137 (3) , 1435-1454 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
本发明属于微生物技术领域，具体涉及一株普罗威登斯菌PL1及其在含氮水体脱氮方面的应用。本发明提供了一株普罗威登斯菌PL1，已进行生物保藏，保藏编号为CGMCCNo.26920。本发明普罗威登斯菌PL1生长适应期较短，以氨氮和硝酸盐氮为氮源时，菌株可以在24h内快速进入对数期生长；作为中间产物的亚硝态氮极少积累，其积累浓度均不超过1mg/L，对氨氮去除率可达到99％以上，对总氮的去除率达到82.221％，硝酸盐氮的去除率为64.925％，具有显著的氨氮脱除效果和好氧反硝化能力，在含氮废水水处理方面具有极大的应用价值。
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | 魏延森 , 王海燕 , 刘伟 et al. 一株普罗威登斯菌PL1及其在含氮水体脱氮方面的应用 : CN202310637196.4[P]. | 2023-06-01 . |
| MLA | 魏延森 et al. "一株普罗威登斯菌PL1及其在含氮水体脱氮方面的应用" : CN202310637196.4. | 2023-06-01 . |
| APA | 魏延森 , 王海燕 , 刘伟 , 叶青 . 一株普罗威登斯菌PL1及其在含氮水体脱氮方面的应用 : CN202310637196.4. | 2023-06-01 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Graphitic carbon nitride (g-C3N4, CN) is widely utilized in the field of photocatalytic hydrogen production owing to its exceptional visible light absorption, addressing the challenge of energy scarcity. However, its development has been hindered by the issue of low charge separation efficiency. In this study, an ultrathin (similar to 1.65 nm) oxygen-doped graphitic carbon nitride nanosheets loaded amorphous mesoporous nickel hydroxide (a-Ni(OH)(2)/OCN) photocatalyst was developed through a straightforward calcination and stirring approach. Under visible light irradiation, a-Ni(OH)(2)/OCN exhibited a remarkably high photocatalytic hydrogen evolution rate of 4764.9 mu mol center dot h(-1) g(-1), which is 4.7 times greater than that of the original CN. The synergistic effect between O-doping and heterojunction was proved by experimental data analysis combined with DFT calculations. Totally, the introduction of oxygen into CN led to a reduction in its band gap, while a-Ni(OH)(2)/OCN heterojunction achieved a broaden light absorption range and an effective charge separation due to a type-II internal electric fields.
关键词 ：
Heterojunction Heterojunction Photocatalytic hydrogen evolution Photocatalytic hydrogen evolution Amorphous mesoporous nickel hydroxide Amorphous mesoporous nickel hydroxide Oxygen-deped graphitic carbon nitride Oxygen-deped graphitic carbon nitride
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Yang, Decai , Qu, Chao , Meng, Fanwei et al. Synergistic enhancement of photocatalytic hydrogen evolution by ultrathin oxygen-doped graphitic carbon nitride nanosheets loaded amorphous mesoporous nickel hydroxide [J]. | SEPARATION AND PURIFICATION TECHNOLOGY , 2023 , 330 . |
| MLA | Yang, Decai et al. "Synergistic enhancement of photocatalytic hydrogen evolution by ultrathin oxygen-doped graphitic carbon nitride nanosheets loaded amorphous mesoporous nickel hydroxide" . | SEPARATION AND PURIFICATION TECHNOLOGY 330 (2023) . |
| APA | Yang, Decai , Qu, Chao , Meng, Fanwei , Wang, Lanyang , Li, Yongqi , Ye, Qing . Synergistic enhancement of photocatalytic hydrogen evolution by ultrathin oxygen-doped graphitic carbon nitride nanosheets loaded amorphous mesoporous nickel hydroxide . | SEPARATION AND PURIFICATION TECHNOLOGY , 2023 , 330 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The yCe-xMn/Fe-PILC (x and y are the nominal weight percentages of Mn and Ce, respectively; x = 4.0 wt%, y = 2.0, 4.0, and 6.0 wt%) catalysts were prepared using the impregnation method. Physicochemical properties of the as-prepared materials were measured by means of the XRD, SEM, BET, TPR, XPS, TGA-DSC, and in situ DRIFTS techniques, and their catalytic activities for the selective catalytic reduction of NO with NH3 (NH3-SCR) at low temperatures were evaluated. The 4Ce-4Mn/Fe-PILC showed the highest NO conversion of 95% at 350 degrees C and better resistance to SO2 poisoning than the Ce-free 4Mn/Fe-PILC. The loading of ceria not only increased the concentrations of active Mn4+ species and chemisorbed oxygen (O-ads) species, but also improved redox ability of the 4Ce-4Mn/Fe-PILC. After SO2 poisoning, the concentrations of active Mn4+ and O-ads species in the ceria-loaded samples were decreased by less extents than those in the ceria-free sample. The in situ DRIFTS results further demonstrated that the doping of ceria increased the amount of acid sites, enhanced the formation of NH3 intermediates (i.e., monodentate nitrite and bridging nitrate), and protected the main active Mn4+ species. Therefore, the samples containing ceria possessed better resistance to SO2 poisoning.
关键词 ：
Iron-pillared clay Iron-pillared clay NH3-SCR NH3-SCR Manganese oxide loading Manganese oxide loading SO2 resistance SO2 resistance Ceria doping Ceria doping
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Wang, Xinpeng , Ye, Qing , Liu, Wenyi et al. Improved sulfur dioxide resistance of the Mn/Fe-pillared interlayered clay by the doping of ceria in the selective catalytic reduction of NO with NH3 [J]. | REACTION KINETICS MECHANISMS AND CATALYSIS , 2023 , 136 (3) : 1263-1281 . |
| MLA | Wang, Xinpeng et al. "Improved sulfur dioxide resistance of the Mn/Fe-pillared interlayered clay by the doping of ceria in the selective catalytic reduction of NO with NH3" . | REACTION KINETICS MECHANISMS AND CATALYSIS 136 . 3 (2023) : 1263-1281 . |
| APA | Wang, Xinpeng , Ye, Qing , Liu, Wenyi , Meng, Fanwei , Yang, Fan , Zhang, Xin et al. Improved sulfur dioxide resistance of the Mn/Fe-pillared interlayered clay by the doping of ceria in the selective catalytic reduction of NO with NH3 . | REACTION KINETICS MECHANISMS AND CATALYSIS , 2023 , 136 (3) , 1263-1281 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
制备了金纳米粒子-氧化石墨烯(AuNPs-GO)复合物,采用透射电镜(TEM)和紫外-可见吸收光谱(UV-Vis)对其进行了表征。将此复合物修饰到玻碳电极(GCE)表面,再通过Au—S键将巯基修饰的富含鸟嘌呤的DNA链(T30695)自组装到电极表面的金纳米粒子上。T30695可与Pb~(2+)结合形成稳定的平行G-四链体,此G-四链体再与氯化血红素(Hemin)结合形成具有过氧化物酶活性的DNA酶(DNAzyme),基于此制得Pb~(2+)敏感的DNA酶电化学传感器。形成的DNA酶可催化H_2O_2氧化对苯二酚(HQ),实现电化学信号的放大和Pb~(2+)的高灵敏检测。在优化的实验条件下,在...
关键词 ：
DNA酶 DNA酶 方波伏安法 方波伏安法 铅离子(Ⅱ) 铅离子(Ⅱ) 传感器 传感器
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | 杨瑞 , 康天放 , 鲁理平 et al. 基于DNA酶/AuNPs-GO传感器方波伏安法高灵敏检测Pb~(2+) [J]. | 分析化学 , 2021 , 49 (02) : 309-317 . |
| MLA | 杨瑞 et al. "基于DNA酶/AuNPs-GO传感器方波伏安法高灵敏检测Pb~(2+)" . | 分析化学 49 . 02 (2021) : 309-317 . |
| APA | 杨瑞 , 康天放 , 鲁理平 , 叶青 . 基于DNA酶/AuNPs-GO传感器方波伏安法高灵敏检测Pb~(2+) . | 分析化学 , 2021 , 49 (02) , 309-317 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
As a heavy metal, Pb is one component in coal-fired flue gas and is widely considered to have a strong negative effect on catalyst activity in the selective catalytic reduction of NOx by NH3 (NH3-SCR). In this paper, we investigated the deactivation mechanism of the Mo-Ce/Zr-PILC catalyst induced by Pb in detail. We found that NO conversion over the 3Mo4Ce/Zr-PILC catalyst decreased greatly after the addition of Pb. The more severe deactivation induced by Pb was attributed to low surface area, lower amounts of chemisorbed oxygen species and surface Ce3+, and lower redox ability and surface acidity (especially a low number of Bronsted acid sites). Furthermore, the addition of Pb inhibited the formation of highly active intermediate nitrate species generated on the surface of the catalyst, hence decreasing the NH3-SCR activity.
关键词 ：
Mo-Ce/Zr-PILC catalyst Mo-Ce/Zr-PILC catalyst NH3-SCR NH3-SCR Pb poisoning Pb poisoning surface acidity surface acidity
引用：
复制并粘贴一种已设定好的引用格式，或利用其中一个链接导入到文献管理软件中。
| GB/T 7714 | Li, Chenxi , Cheng, Jin , Ye, Qing et al. The Deactivation Mechanism of the Mo-Ce/Zr-PILC Catalyst Induced by Pb for the Selective Catalytic Reduction of NO with NH3 [J]. | NANOMATERIALS , 2021 , 11 (10) . |
| MLA | Li, Chenxi et al. "The Deactivation Mechanism of the Mo-Ce/Zr-PILC Catalyst Induced by Pb for the Selective Catalytic Reduction of NO with NH3" . | NANOMATERIALS 11 . 10 (2021) . |
| APA | Li, Chenxi , Cheng, Jin , Ye, Qing , Meng, Fanwei , Wang, Xinpeng , Dai, Hongxing . The Deactivation Mechanism of the Mo-Ce/Zr-PILC Catalyst Induced by Pb for the Selective Catalytic Reduction of NO with NH3 . | NANOMATERIALS , 2021 , 11 (10) . |
| 导入链接 | NoteExpress RIS BibTex |
导出
| 数据： |
选中 到 |
| 格式： |
