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Effect of noble metal nanoparticle size on C–N bond cleavage performance in hydrodenitrogenation: a study

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1986-2000 doi: 10.1007/s11705-023-2337-5

Abstract: Breakage of the C–N bond is a structure sensitive process, and the catalyst size significantly affectsOn the active metal nanoparticle scale, the role of catalyst size in C–N bond cleavage has not been clearlyResults showed a 13 times higher reaction rate for sp<sup>3sup>-hybridized C–N bond cleavage than sp<sup>2sup>-hybridized C–N bond cleavage, while the reaction rate tended to increase first and thenbond cleavage activity, and the step atoms are the active sites for the C–N bond cleavage.

Keywords： sp<sup>3sup>/sp<sup>2sup>-hybridized C–N bond     noble metal nanoparticle     catalytic active site     turnover    

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Calculation of H2<sup>+sup> Structural Parameters based on Hydrogen Atomic Protonized Model

Chen Jing

Strategic Study of CAE 2004, Volume 6, Issue 11,   Pages 29-32

Abstract:

The hydrogen atomic protonized model was introduced in present paper for calculation of H2<sup>+sup> structural parameters.Three formulas deduced from above model for bond-length, bond-energy and force constant of hydrogen moleculeion were Re=2a0, Keywords： hydrogen molecule ion     bond-length     bond-energy     force constant    

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Symbiotic performance, shoot biomass and water-use efficiency of three groundnut (

Sofiya K. MUHABA, Felix D. DAKORA

Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 4,   Pages 455-466 doi: 10.15302/J-FASE-2020354

Abstract: fixation, and C assimilation.There was, however, no effect on shoot δ C values in either year.The three genotypes differed significantly in δ N, %Ndfa, N-fixed, grain yield, C concentration, and δ C.soil N uptake.

Keywords： shoot yield     N-fixed     %Ndfa     δ<sup>15sup>N     δ<sup>13sup>C     water-use efficiency    

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An electrochemical process that uses an Fe

Chaojie Jiang, Lifen Liu, John C. Crittenden

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0860-z

Abstract: A bio-electrochemical fuel cell reactor with cathodic Fe /TiO generates electricity. It destroys recalcitrant pollutants in cathode chamber without photocatalysis. Fe /TiO generates reactive oxygenated species in the dark or under photocatalysis. Cathodic produced ROS (hydroxy radical/superoxide radical) can degrade tetracycline or dyes. Electricity generation is enhanced by semiconductor catalyzed cathodic degradation of pollutants. In this study, a new water treatment system that couples (photo-) electrochemical catalysis (PEC or EC) in a microbial fuel cell (MFC) was configured using a stainless-steel (SS) cathode coated with Fe /TiO . We examined the destruction of methylene blue (MB) and tetracycline. Fe /TiO was prepared using a chemical reduction-deposition method and coated onto an SS wire mesh (500 mesh) using a sol technique. The anode generates electricity using microbes (bio-anode). Connected via wire and ohmic resistance, the system requires a short reaction time and operates at a low cost by effectively removing 94% MB (initial concentration 20 mg·L ) and 83% TOC/TOC under visible light illumination (50 W; 1.99 mW·cm for 120 min, MFC-PEC). The removal was similar even without light irradiation (MFC-EC). The of the MFC-PEC system was approximately 0.675 kWh·m ·order , whereas that of the MFC-EC system was zero. The system was able to remove 70% COD in tetracycline solution (initial tetracycline concentration 100 mg·L ) after 120 min of visible light illumination; without light, the removal was 15% lower. The destruction of MB and tetracycline in both traditional photocatalysis and photoelectrocatalysis systems was notably low. The electron spin-resonance spectroscopy (ESR) study demonstrated that ·OH was formed under visible light, and ·O was formed without light. The bio-electricity-activated O and ROS (reactive oxidizing species) generation by Fe /TiO effectively degraded the pollutants. This cathodic degradation improved the electricity generation by accepting and consuming more electrons from the bio-anode.

Keywords： Bio-anode     Photocatalytic cathode     Fe<sup>0sup>/TiO2     ESR     Dye and antibiotics     Advanced oxidation    

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Controllable synthesis of a large TS-1 catalyst for clean epoxidation of a C=C double bond under mild

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 6,   Pages 772-783 doi: 10.1007/s11705-022-2280-x

Abstract: preparation process, and TS-1#0.1ACh was also employed in epoxidations of different substrates containing C=C double bonds.novel, easily separable and large TS-1 catalysts for efficient and clean industrial epoxidations of C=C double bonds.

Keywords： size-controlled TS-1     crystal modifier     steam-assisted crystallization     epoxidation    

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New insight into effect of potential on degradation of Fe-N-C catalyst for ORR

Yanyan GAO, Manman QI, Liang HE, Haiping CHEN, Wenzhe LUO, Ming HOU, Zhigang SHAO

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 421-430 doi: 10.1007/s11708-021-0727-2

Abstract: In recent years, Fe-N-C catalyst is particularly attractive due to its high oxygen reduction reactionHowever, the durability problems still pose challenge to the application of Fe-N-C catalyst.Although considerable work has been done to investigate the degradation mechanisms of Fe-N-C catalystIn fact, the 2e pathway in the ORR process of Fe-N-C catalyst would result in the formation of H O ,In this paper, a new insight into the effect of potential on degradation of Fe-N-C catalyst was provided

Keywords： proton exchange membrane fuel cells (PEMFCs)     oxygen reduction reaction (ORR)     Fe-N-C catalyst     potential     H2O2     degradation    

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NiCo2O4@quinone-rich N–C core–shell nanowires as composite electrode for electric double layer capacitor

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4,   Pages 373-386 doi: 10.1007/s11705-022-2223-6

Abstract: their performance and the amount of carbon material loaded on the electrodes, in this work, NiCo22O>–2sup> at the current density of 1 mA∙cm<sup>–2sup>.>–3sup> at a power density of 180 mW∙cm<sup>–3sup>.>–2sup>.

Keywords： carbon cloth     NiCo2O4 nanowires     core−shell structure     quinone-rich     electric double    

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Enhancing the efficiency of nitrogen removing bacterial population to a wide range of C:N ratio (1.5:1 to 14:1) for simultaneous C & N removal

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1522-y

Abstract:

• Simultaneous C & N removal in Methammox occurs at wide C:N ratio.

Keywords： Methanogens     Biological Nitrogen Removal (BNR)     Simultaneous     Methammox     C:N ratio    

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A density functional theory study of methane activation on MgO supported NiM cluster: role of M on C–H

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 10,   Pages 1485-1492 doi: 10.1007/s11705-022-2169-8

Abstract: The role of M on the first C–H bond cleavage of CH4 was investigated.Doping elements of the same period in Ni cluster, such as Fe, Co and Cu, for C–H bond activation followsAs a result, Ni–Fe shows the best ability for C–H bond cleavage.Consequently, C–H bond activation demands a lower energy barrier on Ni–Pt cluster.

Keywords： CH4 dissociation     Ni–M     C–H bond activation     charge transfer    

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Persulfate-Induced Three Coordinate Nitrogen (N3C) Vacancies in Defective Carbon Nitride forEnhanced Photocatalytic H2O2 Evolution Article

Wei Miao, Yijie Wang, Ying Liu, Hehe Qin, Chengcheng Chu, Shun Mao

Engineering 2023, Volume 25, Issue 6,   Pages 214-221 doi: 10.1016/j.eng.2021.12.016

Abstract: Introducing N defects in g-C3N4 has been proved to be an effective strategy toN4 with abundant three coordinate nitrogen (N3C) vacancies.Our results showed that the introduction of N3C vacancies in the g-C3N4 successfullyThe photocatalytic H2O2 evolution from the N3C-rich g-C3NThis study demonstrates a novel strategy to introduce N3C vacancies in g-C3N4, which offers a new method

Keywords： Carbon nitride     N3C vacancy     Hydrogen peroxide evolution     Photocatalysis     Persulfate    

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Selective recovery of Cu

Haiping LUO,Bangyu QIN,Guangli LIU,Renduo ZHANG,Yabo TANG,Yanping HOU

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 3,   Pages 522-527 doi: 10.1007/s11783-014-0633-5

Abstract: As the bioelectrochemical system, the microbial fuel cell (MFC) and the microbial electrolysis cell (MEC) were developed to selectively recover Cu and Ni ions from wastewater. The wastewater was treated in the cathode chambers of the system, in which Cu and Ni ions were removed by using the MFC and the MEC, respectively. At an initial Cu concentration of 500 mg·L , removal efficiencies of Cu increased from 97.0%±1.8% to 99.0%±0.3% with the initial Ni concentrations from 250 to 1000 mg·L , and maximum power densities increased from 3.1±0.5 to 5.4±0.6 W·m . The Ni removal mass in the MEC increased from 6.8±0.2 to 20.5±1.5 mg with the increase of Ni concentrations. At an initial Ni concentration of 500 mg·L , Cu removal efficiencies decreased from 99.1%±0.3% to 74.2%±3.8% with the initial Cu concentrations from 250 to 1000 mg·L , and maximum power densities increased from 3.0±0.1 to 6.3±1.2 W·m . Subsequently, the Ni removal efficiencies decreased from 96.9%±3.1% to 73.3%±5.4%. The results clearly demonstrated the feasibility of selective recovery of Cu and Ni from the wastewater using the bioelectrochemical system.

Keywords： bioelectrochemical system     Cu<sup>2+sup>     Ni<sup>2+sup>     selective recovery    

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NETO2 promotes melanoma progression via activation of the Ca/CaMKII signaling pathway

Frontiers of Medicine 2023, Volume 17, Issue 2,   Pages 263-274 doi: 10.1007/s11684-022-0935-0

Abstract: Neuropilin and tolloid-like 2 (NETO2) is closely related to tumorigenesis.However, the functional significance of NETO2 in melanoma progression remains unclear.invasion by downregulating the levels of calcium ions (Ca<sup>2+sup>) and the expression of key genesBy contrast, NETO2 overexpression had the opposite effects.indicating that targeting NETO2 may effectively improve melanoma treatment.

Keywords： melanoma     neuropilin and tolloid-like 2     Ca<sup>2+sup>/CaMKII signaling pathway    

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Innate and adaptive T cells in influenza disease

Simone Nüssing, Sneha Sant, Marios Koutsakos, Kanta Subbarao, Thi H.O. Nguyen, Katherine Kedzierska

Frontiers of Medicine 2018, Volume 12, Issue 1,   Pages 34-47 doi: 10.1007/s11684-017-0606-8

Abstract: summarize the current knowledge on influenza-specific innate MAIT and gd T cells as well as adaptive CD8<sup>+sup> and CD4<sup>+sup> T cells, and discuss how these responses can be harnessed by novel vaccine

Keywords： influenza     innate T cells     CD4<sup>+sup> and CD8<sup>+sup> T cells     vaccination    

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Coupling the porous conditional moment closure with the random pore model: applications to gasification and CO

N. SAULOV, C. R. CHODANKA, M. J. CLEARY, A. Y. KLIMENKO

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 1,   Pages 84-93 doi: 10.1007/s11705-011-1164-2

Abstract: Gasification of coal or biomass with in situ CO capture simultaneously allows production of clean hydrogen at relatively low cost and reduced emission of CO into the atmosphere. Clearly, this technology has a great potential for a future carbon constrained economy. Therefore, the development of a comprehensive, physically-based gasifier model is important. The sub-models that describe reactive transport processes in coal particles as well as in particles of CO sorbent material are among the key sub-models, which provide a necessary input for an overall gasifier model. Both coal and sorbent are materials that have complicated pore structures. The porous conditional moment closure (PCMC) model proves to be adequate for modeling reactive transport through porous media with fixed pore structure. Consumption of coal in the heterogeneous gasification reaction, however, widens the pores and reduces the surface area available for this reaction. At the same time, formation of a carbonate layer narrows the pores in the sorbent material and reduces the reaction rate of CO sorption. In both cases the pore structures are affected. Such changes are not taken into account in the existing PCMC model. In this study, we obtain the parameters of the diffusive tracer distribution based on the pore size distribution given by the widely applied random pore model (RPM), while coupling PCMC with RPM. Such coupling allows taking into account changes in pore structure caused by heterogeneous reactions and thus improves the accuracy of these key sub-models.

Keywords： gasification     CO2 capture     PCMC     RPM    

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Application of Fe

Xiaowei ZHANG,Qinyan YUE,Dongting YUE,Baoyu GAO,Xiaojuan WANG

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 3,   Pages 402-410 doi: 10.1007/s11783-014-0659-8

Abstract: In this study, Fe /C/Clay ceramics, a kind of novel micro-electrolysis filler, were sintered and employedThe optimum conditions for wastewater treatment were: AR73, influent pH of 4, HRT of 2 h and aerationContinuous running tests showed that improvement of micro-electrolysis system with Fe /C/Clay ceramics

Keywords： Fe<sup>0sup>/C/Clay ceramics     micro-electrolysis     Acid Red 73     Reactive Blue 4     synthetic wastewater    

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Title Author Date Type Operation

Effect of noble metal nanoparticle size on C–N bond cleavage performance in hydrodenitrogenation: a study

Journal Article

Calculation of H2<sup>+sup> Structural Parameters based on Hydrogen Atomic Protonized Model

Chen Jing

Journal Article

Symbiotic performance, shoot biomass and water-use efficiency of three groundnut (

Sofiya K. MUHABA, Felix D. DAKORA

Journal Article

An electrochemical process that uses an Fe

Chaojie Jiang, Lifen Liu, John C. Crittenden

Journal Article

Controllable synthesis of a large TS-1 catalyst for clean epoxidation of a C=C double bond under mild

Journal Article

New insight into effect of potential on degradation of Fe-N-C catalyst for ORR

Yanyan GAO, Manman QI, Liang HE, Haiping CHEN, Wenzhe LUO, Ming HOU, Zhigang SHAO

Journal Article

NiCo2O4@quinone-rich N–C core–shell nanowires as composite electrode for electric double layer capacitor

Journal Article

Enhancing the efficiency of nitrogen removing bacterial population to a wide range of C:N ratio (1.5:1 to 14:1) for simultaneous C & N removal

Journal Article

A density functional theory study of methane activation on MgO supported NiM cluster: role of M on C–H

Journal Article

Persulfate-Induced Three Coordinate Nitrogen (N3C) Vacancies in Defective Carbon Nitride forEnhanced Photocatalytic H2O2 Evolution

Wei Miao, Yijie Wang, Ying Liu, Hehe Qin, Chengcheng Chu, Shun Mao

Journal Article

Selective recovery of Cu

Haiping LUO,Bangyu QIN,Guangli LIU,Renduo ZHANG,Yabo TANG,Yanping HOU

Journal Article

NETO2 promotes melanoma progression via activation of the Ca/CaMKII signaling pathway

Journal Article

Innate and adaptive T cells in influenza disease

Simone Nüssing, Sneha Sant, Marios Koutsakos, Kanta Subbarao, Thi H.O. Nguyen, Katherine Kedzierska

Journal Article

Coupling the porous conditional moment closure with the random pore model: applications to gasification and CO

N. SAULOV, C. R. CHODANKA, M. J. CLEARY, A. Y. KLIMENKO

Journal Article

Application of Fe

Xiaowei ZHANG,Qinyan YUE,Dongting YUE,Baoyu GAO,Xiaojuan WANG

Journal Article