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Metal-free, carbon-based catalysts for oxygen reduction reactions

Zhiyi Wu,Zafar Iqbal,Xianqin Wang

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 3,   Pages 280-294 doi: 10.1007/s11705-015-1524-4

Abstract: Developing metal-free, carbon-based catalysts to replace platinum-based catalysts for oxygen reductionCompared to metallic catalysts, these materials are highly active, stable, inexpensive, and environmentallydistribution of the incorporated heteroatoms, as well as better understanding the ORR mechanisms in these catalysts

Keywords： oxygen reduction reaction     electrocatalysis     metal-free     carbon-based     polynitrogen    

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Recent advances on metal-free graphene-based catalysts for the production of industrial chemicals

Zhiyong Wang, Yuan Pu, Dan Wang, Jie-Xin Wang, Jian-Feng Chen

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 855-866 doi: 10.1007/s11705-018-1722-y

Abstract: With the development of carbon catalysts, graphene-based metal-free catalysts have drawn increasing attentionIn recent years, the catalytic activities of metal-free catalysts have significantly improved and theyhave become promising alternatives to traditional metal-based catalysts.The use of metal-free catalysts greatly improves the sustainability of chemical processes.In view of this, the recent progress in the preparation of graphene-based metal-free catalysts along

Keywords： graphene-based materials     metal-free catalyst     industrial chemical productions     catalytic reaction    

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Hollow carbon spheres and their noble metal-free hybrids in catalysis

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1380-1407 doi: 10.1007/s11705-021-2097-z

Abstract: Herein, we overview hollow carbon sphere-based materials and their noble metal-free hybrids in catalysison controlling pore structure and surface morphology, and then heterogeneous doping as well as their metal-free/containing hybrids are presented; next, possible applications for non-noble metal/hollow carbon sphere

Keywords： hollow carbon spheres     functionalization     noble metal-free     catalysis    

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Nitrogen-Doped Graphene Foam as a Metal-Free Catalyst for Reduction Reactions under a High Gravity Field Article

Zhiyong Wang, Zhijian Zhao, Jesse Baucom, Dan Wang, Liming Dai, Jian-Feng Chen

Engineering 2020, Volume 6, Issue 6,   Pages 680-687 doi: 10.1016/j.eng.2019.12.018

Abstract:

Herein, we report on the effect of a high gravity field on metal-free catalytic reduction, takinghighgravity rotating tube reactor packed with three-dimensional (3D) nitrogen-doped graphene foam (NGF) as a metal-freeThe apparent rate constant (kapp) of the metal-free catalytic reduction of NB inThe structure of the 3D metal-free catalysts was stable during the reaction process under a high gravitythe potential to use a high-gravity rotating packed tube reactor for the process intensification of metal-free

Keywords： High-gravity technology     Process intensification     Metal-free catalysts     Carbon nanomaterials     Catalytic    

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Current challenge and perspective of PGM-free cathode catalysts for PEM fuel cells

Gang WU

Frontiers in Energy 2017, Volume 11, Issue 3,   Pages 286-298 doi: 10.1007/s11708-017-0477-3

Abstract: To significantly reduce the cost of proton exchange membrane fuel cells, platinum-group metal (PGM)-freecathode catalysts are highly desirable.Current M-N-C (M: Fe, Co or Mn) catalysts are considered the most promising due to their encouragingThe current Edisonian approach (i.e., trial and error) to developing PGM-free catalysts has been ineffectiveStructural and chemical controlled precursors such as metal-organic frameworks are highly desirable for

Keywords： oxygen reduction     fuel cells     cathode     nonprecious metal catalysts     carbon nanocomposites    

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Copper nanoparticles/polyaniline-derived mesoporous carbon electrocatalysts for hydrazine oxidation

Tao Zhang, Tewodros Asefa

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 3,   Pages 329-338 doi: 10.1007/s11705-018-1741-8

Abstract:

Copper nanoparticles-decorated polyaniline-derived mesoporous carbon that can serve as noble metal-freegood electrocatalytic performance makes this material a promising alternative to conventional noble metal-basedcatalysts (e.g., Pt) that are commonly used in HzOR-based fuel cells.

Keywords： copper nanoparticles     mesoporous carbon     noble metal-free electrocatalyst     hydrazine oxidation reaction    

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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 highercatalysts.Here, we investigated the diffusion process in enzyme–metal hybrid catalysts using Pd/lipase-Pluronicsites, which provides a theoretical foundation for the rational design of enzyme–metal hybrid catalysts

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: Fe, Co, Ni, Cu or Zn) and Cs Cu H P Mo VO ( = 0.1, 0.3 or 0.7) were synthesized and then used as catalystsThe 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 theundoped catalysts.secondary structures, while the catalysts doped with Co, Ni or Zn had both triclinic and cubic phases

Keywords： heteropoly compounds     transition metals     selective oxidation     methacrolein    

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Oxygen reduction electrocatalysis: From conventional to single-atomic platinum-based catalysts for proton

Frontiers in Energy doi: 10.1007/s11708-023-0907-3

Abstract: Platinum (Pt)-based materials are still the most efficient and practical catalysts to drive the sluggish/nanostructuring Pt particles and modifying/innovating supports in developing conventional Pt-based catalysts, Pt single-atom catalysts (Pt SACs) as the recently burgeoning hot materials with a potential to achieveThe single-atomic Pt coordinating with non-metals and alloying with metals as well as the metal-supportsingle-atoms with carbon/non-carbon supports are emphasized in terms of the ORR activity and stability of the catalysts

Keywords： oxygen reduction electrocatalysis     Pt single-atom catalysts     conventional Pt-based catalysts     designthoughts and synthesis     metal-support interactions    

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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 frameworkwas employed as catalysts for the oxidation of -bromotoluene (PBT) to -bromobenzaldehyde (BBD) in aceticAmong these catalysts, the Co/meso-TiO exhibited high substrate conversion and good product (-bromobenzaldehyde

Keywords： selectivity     conversion     -bromobenzaldehyde     aqueous hydrogen     oxidation    

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Metal salts with highly electronegative cations as efficient catalysts for the liquid-phase nitration

Shenghui Zhou, Kuiyi You, Zhengming Yi, Pingle Liu, Hean Luo

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 2,   Pages 205-210 doi: 10.1007/s11705-017-1625-3

Abstract: Metal salts with highly electronegative cations have been used to effectively catalyze the liquid-phasenitration of benzene by NO to nitrobenzene under solvent-free conditions.In addition, it was determined that the metal counterion and the presence of water hydrates in the salt

Keywords： metal salts     electronegativity     nitrobenzene     NO2     catalytic nitration    

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Preparation of rare-earth metal complex oxide catalysts for catalytic wet air oxidation

LI Ning, LI Guangming, YAO Zhenya, ZHAO Jianfu

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 2,   Pages 190-195 doi: 10.1007/s11783-007-0033-1

Abstract: Developing catalysts with high activity and stability is crucial for the application of the CWAO processThe Mn/Ce complex oxide catalysts for CWAO of high concentration phenolcontaining wastewater were preparedThe Mn/Ce serial catalysts were characterized by Brunauer Emmett Teller (BET) analysis and the metalThe results show that the catalysts have high catalytic activities even at a low temperature (80?

Keywords： torch-atomic emission     Brunauer     Catalytic     process     stability    

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Modified iron-molybdate catalysts with various metal oxides by a mechanochemical method: enhanced formaldehyde

Xue Liu, Lingtao Kong, Shengtao Xu, Chaofan Liu, Fengyun Ma

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1099-1110 doi: 10.1007/s11705-020-2008-8

Abstract: A mechanochemical method was employed to prepare modified iron molybdate catalysts with various metalThe physicochemical properties of the iron molybdate catalysts were characterized, and their performancesIron molybdate catalysts doped with Co(NO ) ·6H O and Al(NO ) ·9H O resulted in high HCHO yields.

Keywords： iron molybdate catalyst     metal oxides     methanol to formaldehyde     Co/Mo ratio     formaldehyde yield    

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Studies on QSAR of metalloporphyrin catalysts in the oxidation of cyclohexane to adipic acid

CHEN Yixia, SHE Yuanbin, XU Jing, LI Yan

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 2,   Pages 155-161 doi: 10.1007/s11705-007-0029-1

Abstract: The turnover numbers (TON) data of 19 catalysts were obtained experimentally under optimal reaction conditionswith the (the energy level of the lowest unoccupied molecule orbit) and L (the bond length between metal-nitrogenproposed structure-activity relationship model could be applied to design some new metalloporphyrin catalysts

Keywords： cyclohexane     concerned metalloporphyrin     structure-activity relationship     metal-nitrogen     oxidation    

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Title Author Date Type Operation

Metal-free, carbon-based catalysts for oxygen reduction reactions

Zhiyi Wu,Zafar Iqbal,Xianqin Wang

Journal Article

Recent advances on metal-free graphene-based catalysts for the production of industrial chemicals

Zhiyong Wang, Yuan Pu, Dan Wang, Jie-Xin Wang, Jian-Feng Chen

Journal Article

Hollow carbon spheres and their noble metal-free hybrids in catalysis

Journal Article

Nitrogen-Doped Graphene Foam as a Metal-Free Catalyst for Reduction Reactions under a High Gravity Field

Zhiyong Wang, Zhijian Zhao, Jesse Baucom, Dan Wang, Liming Dai, Jian-Feng Chen

Journal Article

Current challenge and perspective of PGM-free cathode catalysts for PEM fuel cells

Gang WU

Journal Article

Copper nanoparticles/polyaniline-derived mesoporous carbon electrocatalysts for hydrazine oxidation

Tao Zhang, Tewodros Asefa

Journal Article

Metal-Free Hexagonal Perovskite High-Energetic Materials with NH3OH+/NH2

Yu Shang, Zhi-Hong Yu, Rui-Kang Huang, Shao-Li Chen, De-Xuan Liu, Xiao-Xian Chen, Wei-Xiong Zhang, Xiao-Ming Chen

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

Oxygen reduction electrocatalysis: From conventional to single-atomic platinum-based catalysts for proton

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

Metal salts with highly electronegative cations as efficient catalysts for the liquid-phase nitration

Shenghui Zhou, Kuiyi You, Zhengming Yi, Pingle Liu, Hean Luo

Journal Article

Preparation of rare-earth metal complex oxide catalysts for catalytic wet air oxidation

LI Ning, LI Guangming, YAO Zhenya, ZHAO Jianfu

Journal Article

Modified iron-molybdate catalysts with various metal oxides by a mechanochemical method: enhanced formaldehyde

Xue Liu, Lingtao Kong, Shengtao Xu, Chaofan Liu, Fengyun Ma

Journal Article

Studies on QSAR of metalloporphyrin catalysts in the oxidation of cyclohexane to adipic acid

CHEN Yixia, SHE Yuanbin, XU Jing, LI Yan

Journal Article