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Evaluation of H2sub> on the Evolution Mechanism of NOxi>sub> Storage and Reductionover Pt–Ba–Ce/γ-Al2sub>O3sub> Catalysts Article

Pan Wang, Jing Yi, Chuan Sun, Peng Luo, Lili Lei

Engineering 2019, Volume 5, Issue 3, Pages 568-575 doi: 10.1016/j.eng.2019.02.005

Abstract:

In this investigation, Pt–Ba–Ce/γ-Al2sub>O3sub> catalysts were preparedThe physical and chemical properties of the Pt–Ba–Ce/γ-Al2sub>O3sub>>xsub>, CeO2sub>, and BaCO3sub>, whose peaks were observed in X-ray diffraction(XRD) spectra, dispersed well on the γ-Al2O3, as shown by transmission electron microscope (TEMand conversion were increased when the time of H2sub> exposure (i.e., 30 s, 45 s, and 60 s) was

Keywords： Pt–Ba–Ce/γ-Al2sub>O3sub> catalysts Physicochemical properties NOxi>sub> storageand reduction NOxi>sub> emission H2sub> reductant

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CeO doping boosted low-temperature NH-SCR activity of FeTiO catalyst: A microstructure analysis and reaction mechanistic study

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 5, doi: 10.1007/s11783-022-1539-2

Abstract:

• CeO2sub> doping significantly improved low-temperature NH3sub>-SCR activity on FeTiOxi>sub>.

Keywords： NH3sub>-SCR CeO2sub> doping Low-temperature NOxi>sub> removal Improved redoxproperty In situi> XAFS analysis

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NOxi>sub> and H2sub>S formation in the reductive zone of air-staged combustion of

Jinzhi CAI, Dan LI, Denggao CHEN, Zhenshan LI

Frontiers in Energy 2021, Volume 15, Issue 1, Pages 4-13 doi: 10.1007/s11708-020-0804-y

Abstract: Low NO combustion of blended coals is widely used in coal-fired boilers in China to control NO emission; thus, it is necessary to understand the formation mechanism of NO and H S during the combustion of blended coals. This paper focused on the investigation of reductive gases in the formation of NO and H S in the reductive zone of blended coals during combustion. Experiments with Zhundong (ZD) and Commercial (GE) coal and their blends with different mixing ratios were conducted in a drop tube furnace at 1200°C–1400°C with an excessive air ratio of 0.6–1.2. The coal conversion and formation characteristics of CO, H S, and NO in the fuel-rich zone were carefully studied under different experimental conditions for different blend ratios. Blending ZD into GE was found to increase not only the coal conversion but also the concentrations of CO and H S as NO reduction accelerated. Both the CO and H S concentrations inblended coal combustion increase with an increase in the combustion temperature and a decrease in the excessive air ratio. Based on accumulated experimental data, one interesting finding was that NO and H S from blended coal combustion were almost directly dependent on the CO concentration, and the CO concentration of the blended coal combustion depended on the single char gasification conversion.Thus, CO, NO , and H S formation characteristics from blended coal combustion can be well predicted by single char gasification kinetics.

Keywords： blended coal combustion NOx i>sub>formation H2sub>S formation air staged combustion

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Effects of Pd doping on N

Mingxin Dong, Jun Wang, Jinxin Zhu, Jianqiang Wang, Wulin Wang, Meiqing Shen

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 6, doi: 10.1007/s11783-017-0976-9

Abstract: N O is a powerful greenhouse gas and plays an important role in destructing the ozone layer. This present work investigated the effects of Pd doping on N O formation over Pt/BaO/Al O catalyst. Three types of catalysts, Pt/BaO/Al O , Pt/Pd mechanical mixing catalyst (Pt/BaO/Al O +Pd/Al O ) and Pt-Pd co-impregnation catalyst (Pt-Pd/BaO/Al O ) were prepared by incipient wetness impregnation method. These catalysts were first evaluated in NSR activity tests using H /CO as reductants and then carefully characterized by BET, CO chemisorption, CO-DRIFTs and H -TPR techniques. In addition, temperature programmed reactions of NO with H /CO were conducted to obtain further information about N O formation mechanism. Compared with Pt/BaO/Al O , (Pt/BaO/Al O +Pd/Al O ) produced less N O and more NH during NO storage and reduction process, while an opposite trend was found over (Pt-Pd/BaO/Al O +Al O ). Temperature programmed reactions of NO with H /CO results showed that Pd/Al O component in (Pt/BaO/Al O +Pd/Al O ) played an important role in NO reduction to NH , and the formed NH could reduce NO to N leading to a decrease in N O formation. Most of N O formed over (Pt-Pd/BaO/Al O +Al O ) was originated from Pd/BaO/Al O component. H -TPR results indicated Pd-Ba interaction resulted in more difficult-to-reduce PdO species over Pd/BaO/Al O , which inhibits the NO dissociation and thus drives the selectivity to N O in NO reduction.

Keywords： NOxi>sub> storage reduction Pt/BaO/Al2sub>O3sub> Pd doping N2sub>O formation

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Band-gap tunable (Gaxsub>i>In1−sub>xsub>i>)2sub>O3sub> layer Research Articles

Fabi Zhang, Jinyu Sun, Haiou Li, Juan Zhou, Rong Wang, Tangyou Sun, Tao Fu, Gongli Xiao, Qi Li, Xingpeng Liu, Xiuyun Zhang, Daoyou Guo, Xianghu Wang, Zujun Qin,zhangfabi@outlook.com,qinzj@guet.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 10, Pages 1370-1378 doi: 10.1631/FITEE.2000330

Abstract: Multicomponent oxide (GaIn)O films are prepared on (0001) sapphire substrates to realize a tunable band-gap by technology followed by thermal annealing. The optical properties and band structure evolution over the whole range of compositions in ternary compounds (GaIn)O are investigated in detail. The X-ray diffraction spectra clearly indicate that (GaIn)O films with Ga content varying from 0.11 to 0.55 have both cubic and monoclinic structures, and that for films with Ga content higher than 0.74, only the monoclinic structure appears. The transmittance of all films is greater than 86% in the visible range with sharp absorption edges and clear fringes. In addition, a blue shift of ultraviolet absorption edges from 380 to 250 nm is noted with increasing Ga content, indicating increasing band-gap energy from 3.61 to 4.64 eV. The experimental results lay a foundation for the application of transparent conductive compound (GaIn)O thin films in photoelectric and photovoltaic industry, especially in display, light-emitting diode, and solar cell applications.

Keywords： (GaxIn1−x)2O3薄膜；带隙可调谐；磁控溅射

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Development of an H reduction and moderate oxidation method for 3,5-dimethylpyridine hydrogenation in

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12, Pages 1807-1817 doi: 10.1007/s11705-022-2243-2

Abstract: Therefore, an in-situi> H2sub> reduction and moderate oxidation method was developed to increasethe highest 3,5-dimethylpyridine conversion was obtained for the Ru/C-i1 catalyst prepared by in-situi> H2sub> reduction and moderate oxidation (oxidized at 100 °C).of the in-situi> H2sub> reduction and moderate oxidized Ru/C-i2 catalyst, the interactionThe developed in-situi> H2sub> reduction and moderate oxidation method eliminated the step

Keywords： Ru/C catalyst in-situi> H2sub> reduction and moderate oxidation in-situi> reduction non-in-situi> reduction hydrogenation of 3 5-dimethylpyridine

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Atmospheric heterogeneous reaction of chlorobenzene on mineral -FeO particulates: a chamber experiment study

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 11, doi: 10.1007/s11783-023-1734-9

Abstract:

● Photochemical conversion of chlorobenzene (CB) on α-Fe2sub>O3sub> was evaluated.

Keywords： Photochemical conversion Chlorobenzene αi>-Fe2sub>O3sub> PCDD/Fs Mineral particulate

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On the monolayer dispersion behavior of Co3sub>O4sub> on HZSM-5 support: designing applicable

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11, Pages 1741-1754 doi: 10.1007/s11705-023-2332-x

Abstract: threshold of 0.061 mmol 100 m^–2, equaling to a weight percentage around 4.5%.It has been revealed that the quantities of surface active oxygen (O2sub>^–) and acidsites are crucial for the reaction, which can adsorb and activate NOxi>sub> and NH3capacity, possesses the most abundant active O2sub>^– species and acidic sites, therebycapacity amount of Co3sub>O4sub> onto HZSM-5 support.

Keywords： Co3sub>O4sub>/ZSM-5 NOxi>sub>-SCR by NH3sub> monolayer dispersionthreshold effect surface acid sites surface active O2sub>^– anions

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Recent advances in special morphologic photocatalysts for NO removal

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1573-0

Abstract:

● Systematic information of recent progress in photocatalytic NO x i>sub> removal is provided.

Keywords： NOxi>sub> removal Photocatalyst Graphene C3sub>N4sub> Bi-based compounds

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Superior performance in visible-light-driven hydrogen evolution reaction of three-dimensionally ordered macroporous SrTiO decorated with ZnCdS

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6, Pages 1561-1571 doi: 10.1007/s11705-021-2089-z

Abstract: In this study, we demonstrate the fabrication of three-dimensionally ordered macroporous SrTiO3sub> decorated with Znxi>sub>Cd1−sub>xi>sub>S nanoparticles for hydrogenapparent quantum efficiency of 35.9% at 420 nm, which is 4.2 and 23.9 times higher than those of pure Zn0.5sub>Cd0.5sub>S (4.67 mmol·g⁻¹·h⁻¹) and CdS (0.82 mmol·g⁻¹

Keywords： three-dimensionally ordered macroporous SrTiO3sub> Znxi>sub>Cd1–sub>xi>sub>S visible light hydrogen production promotion mechanism

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g-CN-coated MnO hollow nanorod cathode for stable aqueous Zn-ion batteries

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 2, Pages 217-225 doi: 10.1007/s11705-022-2214-7

Abstract: Herein, superior αi>-MnO2sub>@g-C3sub>N4sub> was successfully prepared forstable zinc-ion batteries (ZIBs) cathode by introducing g-C3sub>N4sub> nanosheets.Compared with pure αi>-MnO2sub>, αi>-MnO2sub>@g-C3sub>N4sub> hasEven at 1 A·g^–1, the αi>-MnO2sub>@g-C3sub>N4sub> still retains 100The αi>-MnO2sub>@g-C3sub>N4sub>-based cathode has the highest energy density

Keywords： αi>-MnO2sub> hollow nanorods g-C3sub>N4sub> heterojunction aqueous Zn-ion

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Dual cross-linked MXene/cellulose nanofiber/nickel alginate film with improved mechanical properties and electromagnetic interference shielding performance

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10, Pages 1460-1469 doi: 10.1007/s11705-023-2335-7

Abstract: Electromagnetic interference pollution has raised urgent demand for the development of electromagnetic interference shielding materials. Transition metal carbides (MXenes) with excellent conductivity have shown great potential in electromagnetic interference (EMI) shielding materials, while the poor mechanical strength, flexibility, and structural stability greatly limit their further applications. Here, cellulose nanofibers and sodium alginate are incorporated with MXene nanosheets as flexible matrices to construct strong and flexible mussel-like layered MXene/Cellulose nanofiber/Sodium Alginate composite films, and nickel ions are further introduced to induce metal coordination crosslinking of alginate units. Benefited from the dual-crosslinked network structure of hydrogen bonding and metal coordination, the tensile strength, Young’s modulus, and toughness of the MXene/cellulose nanofiber/nickel alginate composite film are significantly increased. After subsequent reduction by ascorbic acid, excess nickel ions are reduced to nickel nanoparticles and uniformly dispersed within the highly conductive composite film, which further improved its hysteresis loss effect toward the incident electromagnetic waves. Consequently, the MXene/cellulose nanofiber/nickel alginate-Ni composite film presents a considerably enhanced electromagnetic interference shielding effectiveness (47.17 dB) at a very low thickness of 29 μm. This study proposes a feasible dual-crosslinking and subsequent reduction strategy to synergistically enhance the mechanical properties and electromagnetic interference shielding performance of MXene-based composite materials.

Keywords： Ti3sub>C2sub>Txi>sub> MXene double crosslinking mechanical properties EMI

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>In situi> growth of phosphorized ZIF-67-derived amorphous CoP/Cu2sub>O@CF electrocatalyst

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10, Pages 1430-1439 doi: 10.1007/s11705-023-2320-1

Abstract: Herein, we report an in situi> phosphorization of zeolitic imidazole frameworks (ZIF-67) to generateThe intermediate product was phosphorized to obtain final electrocatalyst (CoP/Cu2sub>O@CF) withThe electrochemical measurement proved that CoP/Cu2sub>O@CF catalyst exhibited excellent HER activitydi>-band center of CoP downshifted after bonding with ZIF-67 and the Gibbs free energy (ΔGi><subThis work illustrates the efficient HER activity of CoP/Cu2sub>O@CF catalyst, which will act as

Keywords： CoP/Cu2sub>O@CF electrocatalyst phosphorization HER DFT

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Ni>-Positive ion activated rapid addition and mitochondrial targeting ratiometric fluorescent probesfor in vivoi> cell H2sub>S imaging

Yan Shi, Fangjun Huo, Yongkang Yue, Caixia Yin

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 1, Pages 64-71 doi: 10.1007/s11705-021-2048-8

Abstract: Heterocyclic compound quinoline and its derivatives exist in natural compounds and have a broad spectrum of biological activity. They play an important role in the design of new structural entities for medical applications. Similarly, indoles and their derivatives are found widely in nature. Amino acids, alkaloids and auxin are all derivatives of indoles, as are dyes, and their condensation with aldehydes makes it easy to construct reaction sites for nucleophilic addition agents. In this work, we combine these two groups organically to construct a rapid response site (within 30 s) for H S, and at the same time, a ratiometric fluorescence response is presented throughout the process of H S detection. As such, the lower detection limit can reach 55.7 nmol/L for H S. In addition, cell imaging shows that this probe can be used for the mitochondrial targeted detection of endogenous and exogenous H S. Finally, this probe application was verified by imaging H S in nude mice.

Keywords： heterocyclic compound hydrogen sulfide ratiometric mitochondrial targeted

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Magnetic Co-doped 1D/2D structured -FeO/MoS effectively activated peroxymonosulfate for efficient abatement

Frontiers of Environmental Science & Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11783-024-1797-2

Abstract:

● Magnetic Co- γ i>-Fe2sub>O3sub>/MoS2sub> were prepared via facile hydrothermal methods.

Keywords： Magnetic Co-γi>-Fe2sub>O3sub>/MoS2sub> Hydrothermal method Bisphenol A Degradation

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Title Author Date Type Operation

Evaluation of H2sub> on the Evolution Mechanism of NOxi>sub> Storage and Reductionover Pt–Ba–Ce/γ-Al2sub>O3sub> Catalysts

Pan Wang, Jing Yi, Chuan Sun, Peng Luo, Lili Lei

Journal Article

CeO doping boosted low-temperature NH-SCR activity of FeTiO catalyst: A microstructure analysis and reaction mechanistic study

Journal Article

NOxi>sub> and H2sub>S formation in the reductive zone of air-staged combustion of

Jinzhi CAI, Dan LI, Denggao CHEN, Zhenshan LI

Journal Article

Effects of Pd doping on N

Mingxin Dong, Jun Wang, Jinxin Zhu, Jianqiang Wang, Wulin Wang, Meiqing Shen

Journal Article

Band-gap tunable (Gaxsub>i>In1−sub>xsub>i>)2sub>O3sub> layer

Fabi Zhang, Jinyu Sun, Haiou Li, Juan Zhou, Rong Wang, Tangyou Sun, Tao Fu, Gongli Xiao, Qi Li, Xingpeng Liu, Xiuyun Zhang, Daoyou Guo, Xianghu Wang, Zujun Qin,zhangfabi@outlook.com,qinzj@guet.edu.cn

Journal Article

Development of an H reduction and moderate oxidation method for 3,5-dimethylpyridine hydrogenation in

Journal Article

Atmospheric heterogeneous reaction of chlorobenzene on mineral -FeO particulates: a chamber experiment study

Journal Article

On the monolayer dispersion behavior of Co3sub>O4sub> on HZSM-5 support: designing applicable

Journal Article

Recent advances in special morphologic photocatalysts for NO removal

Journal Article

Superior performance in visible-light-driven hydrogen evolution reaction of three-dimensionally ordered macroporous SrTiO decorated with ZnCdS

Journal Article

g-CN-coated MnO hollow nanorod cathode for stable aqueous Zn-ion batteries

Journal Article

Dual cross-linked MXene/cellulose nanofiber/nickel alginate film with improved mechanical properties and electromagnetic interference shielding performance

Journal Article

>In situi> growth of phosphorized ZIF-67-derived amorphous CoP/Cu2sub>O@CF electrocatalyst

Journal Article

Ni>-Positive ion activated rapid addition and mitochondrial targeting ratiometric fluorescent probesfor in vivoi> cell H2sub>S imaging

Yan Shi, Fangjun Huo, Yongkang Yue, Caixia Yin

Journal Article

Magnetic Co-doped 1D/2D structured -FeO/MoS effectively activated peroxymonosulfate for efficient abatement

Journal Article