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Microstructure and electrical properties of NaNbO

Shihui XIE, Kongjun ZHU, Jinhao QIU, Hua GUO

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 345-349 doi: 10.1007/s11465-009-0050-9

Abstract: Lead-free piezoelectric ceramics (1- )NaNbO - BaTiO have been fabricated by a traditional ceramic sinteringHowever, the optimum composition for (1- )NaNbO - BaTiO ceramics is 0.90NaNbO -0.10BaTiO .The 0.90NaNbO -0.10BaTiO ceramics sintered at 1250°C have higher properties: piezoelectric constantdielectric constant of 718, planar electromechanical coupling factor of 24%, planar frequency of 3The results show that the (1- )NaNbO - BaTiO ceramics is one of the promising lead-free materials for

Keywords: Lead-free piezoelectric ceramics     NaNbO<sub>3sub>-BaTiO<sub>3sub>     piezoelectricity     ceramics     crystal    

Rh<sub>2sub>O<sub>3sub>/hexagonal CePO<sub>4sub> nanocatalysts for N<sub>2sub>O decomposition

Huan Liu, Zhen Ma

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 4,   Pages 586-593 doi: 10.1007/s11705-017-1659-6

Abstract: Hexagonal CePO nanorods were prepared by a precipitation method and hexagonal CePO nanowires were prepared by hydrothermal synthesis at 150 °C. Rh(NO ) was then used as a precursor for the impregnation of Rh O onto these CePO materials. The Rh O supported on the CePO nanowires was much more active for the catalytic decomposition of N O than the Rh O supported on CePO nanorods. The stability of both catalysts as a function of time on stream was studied and the influence of the co-feed (CO , O , H O or O /H O) on the N O decomposition was also investigated. The samples were characterized by N adsorption-desorption, inductively coupled plasma optical emission spectroscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelectron microscopy, hydrogen temperature-programmed reduction, oxygen temperature-programmed desorption, and CO temperature-programmed desorption in order to correlate the physicochemical and catalytic properties.

Keywords: Rh<sub>2sub>O<sub>3sub>     CePO<sub>4sub>     N<sub>2sub>O decomposition    

Thermodynamic Analysis and Reaction Model of Combustion Synthesis in Al-Cr<sub>2sub>O<sub>3sub> Systemwith Al<sub>2sub>O<sub>3sub> and Cr<sub>2sub>O<sub>3sub> Diluents

Zhang Yancheng,Pan Ye,Zhang Chuan

Strategic Study of CAE 2004, Volume 6, Issue 6,   Pages 63-67

Abstract: lt;/sub>O<sub>3</sub> system with AI<sub>2</sub>O<sub>3</sub>and Cr<sub>2</sub>O<sub>3</sub> diluents were conducted, and the effects of reactionstarting temperature T<sub>O</sub>, diluents AI<sub>2</sub>O<sub>3</sub> and Cr<sub>2</sub>O<sub>3</sub> on the adiabatic combustion temperatureThe near linear relation between T<sub>0</sub> and T<sub>ad</sub> was obtained

Keywords: cermet     combustion synthesis     Al - Cr<sub>2sub>O<sub>3sub> system     thermodynamics     reaction model    

In-MOF-derived In<sub>2sub>S<sub>3sub>/Bi<sub>2sub>S<sub>3sub> heterojunction for enhanced photocatalytic

Frontiers in Energy 2023, Volume 17, Issue 5,   Pages 654-663 doi: 10.1007/s11708-023-0885-5

Abstract: In this paper, a broad spectrum responsive In<sub>2sub>S<sub>3sub>/Bi<sub>2sub>S<sub>3sub> heterojunctionis constructed by in-situ integrating Bi<sub>2sub>S<sub>3sub> with the In<sub>2sub>S<sub>2sub>S<sub>3sub>/Bi<sub>2sub>S<sub>3sub> heterojunction demonstrates a rate of 0.71 mmol/(g∙h), which is 2.2 and 1.7 times as much as those of In<sub>2sub>S<sub>3sub> (0.32 mmol/(g∙h) and Bi<sub>2sub>S<sub>3sub> (0.41 mmol/(g∙h)), respectively.

Keywords: photocatalytic hydrogen production     wide-spectrum response     metal sulfides     MOFs derivative     heterogeneous interfacial contact    

The stabilization effect of Al<sub>2sub>O<sub>3sub> on unconventional Pb/SiO<sub>2sub> catalyst

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1423-1429 doi: 10.1007/s11705-023-2315-y

Abstract: To enhance the stability, the traditional carrier Al<sub>2sub>O<sub>3sub> with a small amount, wasintroduced into Pb/SiO<sub>2sub> catalyst in this study.It has been proved that Al<sub>2sub>O<sub>3sub> can inhibit the reduction of PbO, and weaken theAs a result, 3Al15Pb/SiO<sub>2sub> catalyst exhibits a much higher stability up to more than 150 h.>2sub>O<sub>3sub> addition was also proposed.

Keywords: Pb/SiO<sub>2sub>     Al<sub>2sub>O<sub>3sub>     propane dehydrogenation     propene     stability    

acid anions on highly efficient Ce-based catalysts for selective catalytic reduction of NO with NH<sub>3sub>

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1399-1411 doi: 10.1007/s11705-023-2345-5

Abstract: <sub>3sub>) were synthesized and used for the selective catalytic reduction (SCR) of NO by NH<sub>3NH<sub>3sub>-SCR performances were conducted in the temperature range of 80 to 400 °C.> Ce<sub>2sub>(SO<sub>4sub>)<sub>3sub>, which is in agreement with their abilities of NH<sub>3sub>4sub>3, VO<sub>4sub>3 and SO<sub>4sub>2–2sub> for Ce<sub>2sub>(SO<sub>4sub>)<sub>3sub>.

Keywords: CePO<sub>4sub>     CeVO<sub>4sub>     Ce<sub>2sub>(SO<sub>4sub>)<sub>3sub>     selective catalytic reduction    

On the monolayer dispersion behavior of Co<sub>3sub>O<sub>4sub> 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: Based on monolayer dispersion theory, Co<sub>3sub>O<sub>4sub>/ZSM-5 catalysts with different loadingsCo<sub>3sub>O<sub>4sub> can spontaneously disperse on HZSM-5 support with a monolayer dispersionBelow the monolayer dispersion threshold, Co<sub>3sub>O<sub>4sub> is finely dispersed as sub-monolayersHowever, the formation of crystalline Co<sub>3sub>O<sub>4sub> above the capacity is harmful to thecapacity amount of Co<sub>3sub>O<sub>4sub> onto HZSM-5 support.

Keywords: Co<sub>3sub>O<sub>4sub>/ZSM-5     NO<sub>xsub>-SCR by NH<sub>3sub>     monolayer dispersionthreshold effect     surface acid sites     surface active O<sub>2sub> anions    

CO<sub>2sub> methanation and co-methanation of CO and CO<sub>2sub> over Mn-promoted Ni/Al<sub>2sub>O<sub>3sub> catalysts

Kechao Zhao,Zhenhua Li,Li Bian

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 2,   Pages 273-280 doi: 10.1007/s11705-016-1563-5

Abstract: A series of Mn-promoted 15 wt-% Ni/Al O catalysts were prepared by an incipient wetness impregnation method. The effect of the Mn content on the activity of the Ni/Al O catalysts for CO methanation and the co-methanation of CO and CO in a fixed-bed reactor was investigated. The catalysts were characterized by N physisorption, hydrogen temperature-programmed reduction and desorption, carbon dioxide temperature-programmed desorption, X-ray diffraction and high-resolution transmission electron microscopy. The presence of Mn increased the number of CO adsorption sites and inhibited Ni particle agglomeration due to improved Ni dispersion and weakened interactions between the nickel species and the support. The Mn-promoted 15 wt-% Ni/Al O catalysts had improved CO methanation activity especially at low temperatures (250 to 400 °C). The Mn content was varied from 0.86% to 2.54% and the best CO conversion was achieved with the 1.71Mn-Ni/Al O catalyst. The co-methanation tests on the 1.71Mn-Ni/Al O catalyst indicated that adding Mn markedly enhanced the CO methanation activity especially at low temperatures but it had little influence on the CO methanation performance. CO methanation was more sensitive to the reaction temperature and the space velocity than the CO methanation in the co-methanation process.

Keywords: Mn promotion     nickel catalysts     CO<sub>2sub> methanation     co-methanation of CO and CO<sub>2sub>    

Is atmospheric oxidation capacity better in indicating tropospheric O formation?

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 5, doi: 10.1007/s11783-022-1544-5

Abstract: ListItem>

● This study summarizes and evaluates different approaches that indicate O<sub>3sub> formation.

Keywords: O<sub>3sub>     AOC     O<sub>3sub> formation regime    

Spray Preparation, Microstructure and Properties of Al<sub>2sub>O<sub>3sub>-M<sub>xsub>O Hard -

Wang Biao,Wang Yudong,Li Huiling,Zhang Zihua

Strategic Study of CAE 2002, Volume 4, Issue 9,   Pages 75-80

Abstract: carbon steel substrate, base coating of nickel-coated aluminium and intermediate coating of 50% Al<sub>2sub>O<sub>3sub> + 50% Ni were prepared by means of oxyacetylene spray, and final coating of Al<sub>2sub>O<sub>3sub> ~ M<sub>xsub>O<sub>ysub> was prepared by means of plasma spray.of 60% (mass) sulphuric acid with 60 % concentration, and 40% (mass) phosphoric ore powder, the Al<sub>2sub>O<sub>3sub> ~ M<sub>xsub>O<sub>ysub> coating resistance to corrosion and wear, is 7.46

Keywords: Al<sub>2sub>O<sub>3sub>-M<sub>xsub>O<sub>ysub>     coating     plasma     resistance to corrosion     resistance    

Al<sub>2sub>O<sub>3sub> and CeO<sub>2sub>-promoted MgO sorbents for CO<sub>2sub> capture at moderate

Huimei Yu, Xiaoxing Wang, Zhu Shu, Mamoru Fujii, Chunshan Song

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 83-93 doi: 10.1007/s11705-017-1691-6

Abstract: A series of Al O and CeO modified MgO sorbents was prepared and studied for CO sorption at moderate temperatures. The CO sorption capacity of MgO was enhanced with the addition of either Al O or CeO . Over Al O -MgO sorbents, the best capacity of 24.6 mg-CO /g-sorbent was attained at 100 °C, which was 61% higher than that of MgO (15.3 mg-CO /g-sorbent). The highest capacity of 35.3 mg-CO /g-sorbent was obtained over the CeO -MgO sorbents at the optimal temperature of 200 °C. Combining with the characterization results, we conclude that the promotion effect on CO sorption with the addition of Al O and CeO can be attributed to the increased surface area with reduced MgO crystallite size. Moreover, the addition of CeO increased the basicity of MgO phase, resulting in more increase in the CO capacity than Al O promoter. Both the Al O -MgO and CeO -MgO sorbents exhibited better cyclic stability than MgO over the course of fifteen CO sorption-desorption cycles. Compared to Al O , CeO is more effective for promoting the CO capacity of MgO. To enhance the CO capacity of MgO sorbent, increasing the basicity is more effective than the increase in the surface area.

Keywords: CO<sub>2sub> capture     MgO sorbents     Al<sub>2sub>O<sub>3sub>     CeO<sub>2sub>     flue gas    

Feasibility study of plasma sprayed Al<sub>2sub>O<sub>3sub> coatings as diffusion barrier on CFC

Kirsten BOBZIN, Lidong ZHAO, Nils KOPP, Thomas WARDA

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4,   Pages 371-375 doi: 10.1007/s11465-012-0339-y

Abstract: Within this study the feasibility of plasma sprayed Al<sub>2sub>O<sub>3sub> coatings as diffusionAl<sub>2sub>O<sub>3sub> coatings were prepared by air plasma spraying (APS).The results showed that Al<sub>2sub>O<sub>3sub> could be well deposited onto CFC substrates.temperature of 1270°C, crack network formed within the coating, showing that the plasma sprayed Al<sub>2sub>O<sub>3sub> coatings are limited regarding to their application temperatures as diffusion

Keywords: diffusion barrier coatings     CFC     plasma spraying     microstructure     Al<sub>2sub>O<sub>3sub>    

Evaluation of H<sub>2sub> on the Evolution Mechanism of NO<sub>xsub> Storage and Reductionover Pt–Ba–Ce/γ-Al<sub>2sub>O<sub>3sub> 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-Al<sub>2sub>O<sub>3sub> catalysts were preparedThe physical and chemical properties of the Pt–Ba–Ce/γ-Al<sub>2sub>O<sub>3sub>>xsub>, CeO<sub>2sub>, and BaCO<sub>3sub>, whose peaks were observed in X-ray diffraction(XRD) spectra, dispersed well on the γ-Al2O3, as shown by transmission electron microscope (TEM), and that the difference between Ce3+ and Ce4+, as detected by X-ray photoelectron

Keywords: Pt–Ba–Ce/γ-Al<sub>2sub>O<sub>3sub> catalysts     Physicochemical properties     NO<sub>xsub> storageand reduction     NO<sub>xsub> emission     H<sub>2sub> reductant    

Removal of P<sub>4sub>, PH<sub>3sub> and H<sub>2sub>S from Yellow Phosphoric Tail Gas by a Catalytic

Ning Ping,Hans-Jörg Bart,Wang Xueqian,Ma Liping,Chen Liang

Strategic Study of CAE 2005, Volume 7, Issue 6,   Pages 27-35

Abstract: and activated carbon proved to be effective catalysts in the catalytic oxidation process (COP) for H<sub>2sub>S and PH<sub>3sub> removal.Under optimized operation conditions the product gas with a content of hydrogen sulfide <5 mg/m3, total phosphorus< 5 mg/m3 was obtained by using the COP process.

Keywords: catalyst     catalytic oxidation     H<sub>2sub>S     P<sub>4sub>     PH<sub>3sub>     fixed bed    

Highly selective catalytic hydrodeoxygenation of guaiacol to cyclohexane over Pt/TiO

Zhong HE,Xianqin WANG

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 3,   Pages 369-377 doi: 10.1007/s11705-014-1435-9

Abstract: Catalysts Pt/TiO and NiMo/Al O are highly active and selective for the hydrodeoxygenation of guaiacol in a fixed bed reactor at 300 °C and 7.1 MPa, leading to the hydrogenation of aromatic ring, followed by demethylation and dehydroxylation to produce cyclohexane. For a complete hydrodeoxygenation of guaiacol, metal sites and acid sites are required. NiMo/Al O and Pt/Al O are more active and selective for cyclohexane formation as compared with Pt/TiO at 285 °C and 4 MPa. However, Pt/TiO is stable while the other two catalysts deactivate due to the nature and amount of coke formation during the reaction.

Keywords: Pt/TiO<sub>2sub>     NiMo/Al<sub>2sub>O<sub>3sub>     Pt/Al<sub>2sub>O<sub>3sub>     bio-oil     hydrodeoxygenation    

Title Author Date Type Operation

Microstructure and electrical properties of NaNbO

Shihui XIE, Kongjun ZHU, Jinhao QIU, Hua GUO

Journal Article

Rh<sub>2sub>O<sub>3sub>/hexagonal CePO<sub>4sub> nanocatalysts for N<sub>2sub>O decomposition

Huan Liu, Zhen Ma

Journal Article

Thermodynamic Analysis and Reaction Model of Combustion Synthesis in Al-Cr<sub>2sub>O<sub>3sub> Systemwith Al<sub>2sub>O<sub>3sub> and Cr<sub>2sub>O<sub>3sub> Diluents

Zhang Yancheng,Pan Ye,Zhang Chuan

Journal Article

In-MOF-derived In<sub>2sub>S<sub>3sub>/Bi<sub>2sub>S<sub>3sub> heterojunction for enhanced photocatalytic

Journal Article

The stabilization effect of Al<sub>2sub>O<sub>3sub> on unconventional Pb/SiO<sub>2sub> catalyst

Journal Article

acid anions on highly efficient Ce-based catalysts for selective catalytic reduction of NO with NH<sub>3sub>

Journal Article

On the monolayer dispersion behavior of Co<sub>3sub>O<sub>4sub> on HZSM-5 support: designing applicable

Journal Article

CO<sub>2sub> methanation and co-methanation of CO and CO<sub>2sub> over Mn-promoted Ni/Al<sub>2sub>O<sub>3sub> catalysts

Kechao Zhao,Zhenhua Li,Li Bian

Journal Article

Is atmospheric oxidation capacity better in indicating tropospheric O formation?

Journal Article

Spray Preparation, Microstructure and Properties of Al<sub>2sub>O<sub>3sub>-M<sub>xsub>O Hard -

Wang Biao,Wang Yudong,Li Huiling,Zhang Zihua

Journal Article

Al<sub>2sub>O<sub>3sub> and CeO<sub>2sub>-promoted MgO sorbents for CO<sub>2sub> capture at moderate

Huimei Yu, Xiaoxing Wang, Zhu Shu, Mamoru Fujii, Chunshan Song

Journal Article

Feasibility study of plasma sprayed Al<sub>2sub>O<sub>3sub> coatings as diffusion barrier on CFC

Kirsten BOBZIN, Lidong ZHAO, Nils KOPP, Thomas WARDA

Journal Article

Evaluation of H<sub>2sub> on the Evolution Mechanism of NO<sub>xsub> Storage and Reductionover Pt–Ba–Ce/γ-Al<sub>2sub>O<sub>3sub> Catalysts

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

Journal Article

Removal of P<sub>4sub>, PH<sub>3sub> and H<sub>2sub>S from Yellow Phosphoric Tail Gas by a Catalytic

Ning Ping,Hans-Jörg Bart,Wang Xueqian,Ma Liping,Chen Liang

Journal Article

Highly selective catalytic hydrodeoxygenation of guaiacol to cyclohexane over Pt/TiO

Zhong HE,Xianqin WANG

Journal Article