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Polymerization of methyl methacrylate catalyzed by mono-/bis-salicylaldiminato nickel(II) complexes and methylaluminoxane

Jihong LU, Danfeng ZHANG, Qian CHEN, Buwei YU

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 1,   Pages 19-25 doi: 10.1007/s11705-010-0546-1

Abstract: Two types of salicylaldiminato-based nickel complexes, mono-ligated Ni(II) complexes ([O-C H - - C(H)=N-Ar]Ni(PPh )(Ph) ( ), [O-(3,5-Br )C H - -C(H)=N-Ar]Ni(PPh )(Ph) ( ), [O-(3- -Bu)C H - -C(H)=N-Ar]Ni(PPh )(Ph) ( )) and bis-ligated Ni(II) complexes ([O-(3,5-Br )C H - -C(H)=N-Ar] Ni ( ), [O-(3,5-Br )C H - -C(H)=N-2-C H (PhO)] Ni ( ), Ar=2,6-C H ( -Pr) ) were synthesized and characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR), mass spectrography (MS) and elemental analysis (EA). In the presence of methylaluminoxane (MAO) as cocatalyst, all the nickel complexes exhibited high activities for the polymerization of methyl methacrylate (MMA) and syndiotactic-rich poly(methyl methacrylate) (PMMA) was obtained. The complexes with less bulky substituents on salicylaldiminato framework possessed higher activities, while with the same salicylaldiminato, the mono-ligated nickel complexes showed higher catalytic activity than bis-ligated ones.

Keywords： late transition metal catalyst     methyl methacrylate     polymerization     salicylaldiminato nickel complexes    

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Structural engineering of transition metal-based nanostructured electrocatalysts for efficient water

Yueqing Wang, Jintao Zhang

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 838-854 doi: 10.1007/s11705-018-1746-3

Abstract: Tremendous efforts have been devoted to exploring highly efficient and abundant metal oxide electrocatalystsIn this review, we summarize the recent advances on the development of metal oxide electrocatalysts withThe special strategies relay on the transformation from the metal organic framework and ion exchangereactions for the preparation of novel metal oxide nanostructures with boosting the catalytic activities

Keywords： water splitting     structure engineering     metal organic framework     ion exchange     synergistic effect     hybrid    

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Crystalline mesoporous transition metal oxides: hard-templating synthesis and application in environmental

Zhen MA, Bei ZHOU, Yu REN

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 3,   Pages 341-355 doi: 10.1007/s11783-012-0472-1

Abstract: high surface areas, ordered nanopores, and excellent thermal stability, and have been often used as catalystAlthough mesoporous metal oxides have lower surface areas compared to mesoporous silicas, they generallyMesoporous metal oxides can be synthesized via a soft-templating or hard-templating approach, and theseIn this review, we summarize the synthesis of mesoporous transition metal oxides using mesoporous silicas

Keywords： mesoporous materials     silica     metal oxide     hard-templating     environmental catalysis    

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Signal promoting role of a p-type transition metal dichalcogenide used for the detection of ultra-trace

Abdolhamid Hatefi-Mehrjardi, Amirkhosro Beheshti-Marnani, Zarrin Es'haghi

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 4,   Pages 823-831 doi: 10.1007/s11705-019-1797-0

Abstract: A -type transition metal dichalcogenide (WS ) was synthesized and hybridized with graphene oxide via

Keywords： labeled aptasensor     transition metal dichalcogenide     graphene oxide     sodium diclofenac    

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Self-supported transition metal phosphide based electrodes as high-efficient water splitting cathodes

Yan Zhang, Jian Xiao, Qiying Lv, Shuai Wang

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 3,   Pages 494-508 doi: 10.1007/s11705-018-1732-9

Abstract: Combining novel self-supporting structure and high-performance transition metal phosphides (TMP) showsare divided into three categories: catalysts growing on carbon-based substrates, catalysts growing on metal-basedsubstrates and freestanding catalyst films.

Keywords： transition metal phosphide     self-supported electrode     electrocatalysis     hydrogen evolution reaction    

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Promotion of transition metal oxides on the NH

Weiman Li, Haidi Liu, Yunfa Chen

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 2, doi: 10.1007/s11783-017-0914-x

Abstract: Mn-Zr-Ce catalyst exhibited high tolerance to SO and H O.

Keywords： NH3-selective catalytic reduction     NOx     Low temperature     Cr-Zr-Ce    

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Exploration of the oxygen transport behavior in non-precious metal catalyst-based cathode catalyst layer

Shiqu CHEN, Silei XIANG, Zehao TAN, Huiyuan LI, Xiaohui YAN, Jiewei YIN, Shuiyun SHEN, Junliang ZHANG

Frontiers in Energy 2023, Volume 17, Issue 1,   Pages 123-133 doi: 10.1007/s11708-022-0849-1

Abstract: proton exchange membrane fuel cells (PEMFCs), in which Pt-based catalysts employed in the cathodic catalystAlthough non-precious metal catalysts (NPMCs) show appreciable activity and stability in the oxygen reductionof two types of membrane electrode structures, one containing low-Pt-based CCL and NPMC-based dummy catalyst

Keywords： proton exchange membrane fuel cells (PEMFCs)     non-precious metal catalyst (NPMC)     cathode catalyst layer    

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Catalytic activity of noble metal nanoparticles toward hydrodechlorination: influence of catalyst electronic

Man ZHANG,Feng HE,Dongye ZHAO

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 5,   Pages 888-896 doi: 10.1007/s11783-015-0774-1

Abstract: These metal nanoparticles were then tested for catalytic hydrodechlorination toward two classes of organochlorinatedat the Fermi level) of the metals, suggesting that adsorption of organochlorinated reactants on the metalcatalyst surfaces is the rate-limiting step for catalytic hydrodechlorination.

Keywords： catalytic hydrodechlorination     electronic structure     metal nanoparticles     reaction mechanisms    

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Diffusion process in enzyme–metal hybrid catalysts

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 6,   Pages 921-929 doi: 10.1007/s11705-022-2144-4

Abstract: Enzyme–metal hybrid catalysts bridge the gap between enzymatic and heterogeneous catalysis, which isPrevious studies have demonstrated that the enzyme–metal hybrid catalysts exhibited considerably highercatalytic efficiency in cascade reactions, compared with that of the combination of separated enzyme and metalHere, we investigated the diffusion process in enzyme–metal hybrid catalysts using Pd/lipase-Pluronicactive sites, which provides a theoretical foundation for the rational design of enzyme–metal hybrid

Keywords： enzyme–metal hybrid catalyst     internal diffusion     proximity effect     kinetic model    

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Transition metal-doped heteropoly catalysts for the selective oxidation of methacrolein to methacrylic

Yanxia Zheng,Heng Zhang,Lei Wang,Suojiang Zhang,Shaojun Wang

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 1,   Pages 139-146 doi: 10.1007/s11705-015-1548-9

Abstract: The effects of the transition metals on the structure and activity of the catalysts were investigatedFTIR spectra showed that the transition metal-doped catalysts maintained the Keggin structure of thetemperature-programmed desorption and H temperature-programmed reduction results showed that the transitionThe addition of Fe or Cu had positive effects on the activities of the catalyst which is due to the improvementThe Cs Cu H P Mo VO catalyst had the best performance for the selective oxidation of methacrolein to

Keywords： heteropoly compounds     transition metals     selective oxidation     methacrolein    

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The capture of carbon dioxide by transition metal aluminates, calcium aluminate, calcium zirconate, calcium

Ganesh TILEKAR, Kiran SHINDE, Kishor KALE, Reshma RASKAR, Abaji GAIKWAD

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 4,   Pages 477-491 doi: 10.1007/s11705-011-1107-y

Abstract: The capture of CO by transition metal (Mn, Ni, Co and Zn) aluminates, calcium aluminate, calcium zirconateThe prepared metal adsorbents were characterized by X-ray diffraction (XRD), scanning electron microscopedifferent experimental variables affecting the adsorbents ability to capture CO , such as the mol ratio of metalHowever, the mixed metal oxides captured reasonable amount of CO at these higher temperatures.

Keywords： captured CO2     pre-combustion temperature     characterization     calcium silicate     calcium zirconate    

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Effects of two transition metal sulfate salts on secondary organic aerosol formation in toluene/NO

Biwu CHU, Jiming HAO, Junhua LI, Hideto TAKEKAWA, Kun WANG, Jingkun JIANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 1,   Pages 1-9 doi: 10.1007/s11783-012-0476-x

Abstract: Aerosol phase reactions play a very important role on secondary organic aerosol (SOA) formation, and metal-containingIn this study, we tested the effects of two transition metal sulfate salts, manganese sulfate (MnSO )By comparing photochemical reaction products of experiments with and without transition metal sulfateseed aerosols, we evaluated the effects of transition metal sulfate seed aerosols on toluene consumptionThese observations are consistent when varying metal sulfate aerosol concentrations.

Keywords： manganese sulfate     zinc sulfate     seed aerosols     toluene photooxidation     secondary organic aerosol    

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Micro-sized hydrothermal carbon supporting metal oxide nanoparticles as efficient catalyst for mono-dehydration

Cheng PAN, Chao FAN, Wanqin WANG, Teng LONG, Benhua HUANG, Donghua ZHANG, Peigen SU, Aqun ZHENG, Yang SUN

Frontiers in Energy 2022, Volume 16, Issue 5,   Pages 822-839 doi: 10.1007/s11708-020-0677-0

Abstract: To improve the mono-dehydration efficiency, a series of metal-containing hydrothermal carbonaceous materials(HTC) are prepared as catalyst in this work.

Keywords： hydrothermal carbon     morphology     catalyst     mono-dehydration     sugar alcohol    

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Fischer-Tropsch synthesis by reduced graphene oxide nanosheets supported cobalt catalysts: Role of support and metalnanoparticle size on catalyst activity and products selectivity

Hasan Oliaei Torshizi, Ali Nakhaei Pour, Ali Mohammadi, Yahya Zamani, Seyed Mehdi Kamali Shahri

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 2,   Pages 299-309 doi: 10.1007/s11705-020-1925-x

Abstract: activity results showed that the cobalt-time yield and turnover frequency passed from a maximum for catalyst

Keywords： cobalt catalyst     cobalt particle size     Fischer-Tropsch synthesis     reduced graphene oxide     supported catalyst    

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Transition metal doped mesoporous titania with a crystalline framework as catalysts for oxidation of

YANG Zehui, OU Encai, WANG Yunan, PENG Li, WANG Jiaqiang, YIN Lihui

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 3,   Pages 296-300 doi: 10.1007/s11705-008-0044-x

Abstract: Transition metal M (M = Mn, Fe, Co, Ni, Cu, and Zn) doped mesoporous titania with a crystalline framework

Keywords： selectivity     conversion     -bromobenzaldehyde     aqueous hydrogen     oxidation    

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Title Author Date Type Operation

Polymerization of methyl methacrylate catalyzed by mono-/bis-salicylaldiminato nickel(II) complexes and methylaluminoxane

Jihong LU, Danfeng ZHANG, Qian CHEN, Buwei YU

Journal Article

Structural engineering of transition metal-based nanostructured electrocatalysts for efficient water

Yueqing Wang, Jintao Zhang

Journal Article

Crystalline mesoporous transition metal oxides: hard-templating synthesis and application in environmental

Zhen MA, Bei ZHOU, Yu REN

Journal Article

Signal promoting role of a p-type transition metal dichalcogenide used for the detection of ultra-trace

Abdolhamid Hatefi-Mehrjardi, Amirkhosro Beheshti-Marnani, Zarrin Es'haghi

Journal Article

Self-supported transition metal phosphide based electrodes as high-efficient water splitting cathodes

Yan Zhang, Jian Xiao, Qiying Lv, Shuai Wang

Journal Article

Promotion of transition metal oxides on the NH

Weiman Li, Haidi Liu, Yunfa Chen

Journal Article

Exploration of the oxygen transport behavior in non-precious metal catalyst-based cathode catalyst layer

Shiqu CHEN, Silei XIANG, Zehao TAN, Huiyuan LI, Xiaohui YAN, Jiewei YIN, Shuiyun SHEN, Junliang ZHANG

Journal Article

Catalytic activity of noble metal nanoparticles toward hydrodechlorination: influence of catalyst electronic

Man ZHANG,Feng HE,Dongye ZHAO

Journal Article

Diffusion process in enzyme–metal hybrid catalysts

Journal Article

Transition metal-doped heteropoly catalysts for the selective oxidation of methacrolein to methacrylic

Yanxia Zheng,Heng Zhang,Lei Wang,Suojiang Zhang,Shaojun Wang

Journal Article

The capture of carbon dioxide by transition metal aluminates, calcium aluminate, calcium zirconate, calcium

Ganesh TILEKAR, Kiran SHINDE, Kishor KALE, Reshma RASKAR, Abaji GAIKWAD

Journal Article

Effects of two transition metal sulfate salts on secondary organic aerosol formation in toluene/NO

Biwu CHU, Jiming HAO, Junhua LI, Hideto TAKEKAWA, Kun WANG, Jingkun JIANG

Journal Article

Micro-sized hydrothermal carbon supporting metal oxide nanoparticles as efficient catalyst for mono-dehydration

Cheng PAN, Chao FAN, Wanqin WANG, Teng LONG, Benhua HUANG, Donghua ZHANG, Peigen SU, Aqun ZHENG, Yang SUN

Journal Article

Fischer-Tropsch synthesis by reduced graphene oxide nanosheets supported cobalt catalysts: Role of support and metalnanoparticle size on catalyst activity and products selectivity

Hasan Oliaei Torshizi, Ali Nakhaei Pour, Ali Mohammadi, Yahya Zamani, Seyed Mehdi Kamali Shahri

Journal Article

Transition metal doped mesoporous titania with a crystalline framework as catalysts for oxidation of

YANG Zehui, OU Encai, WANG Yunan, PENG Li, WANG Jiaqiang, YIN Lihui

Journal Article