651
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Wu S, Wen G, Liu X, Zhong B, Su DS. Model Molecules with Oxygenated Groups Catalyze the Reduction of Nitrobenzene: Insight into Carbocatalysis. ChemCatChem 2014. [DOI: 10.1002/cctc.201402070] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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652
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Li Z, Wu D, Liang Y, Fu R, Matyjaszewski K. Synthesis of Well-Defined Microporous Carbons by Molecular-Scale Templating with Polyhedral Oligomeric Silsesquioxane Moieties. J Am Chem Soc 2014; 136:4805-8. [DOI: 10.1021/ja412192v] [Citation(s) in RCA: 166] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Zhenghui Li
- Materials
Science Institute, PCFM Lab and DSAPM Lab, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Dingcai Wu
- Materials
Science Institute, PCFM Lab and DSAPM Lab, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Yeru Liang
- Materials
Science Institute, PCFM Lab and DSAPM Lab, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Ruowen Fu
- Materials
Science Institute, PCFM Lab and DSAPM Lab, School of Chemistry and
Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, P. R. China
| | - Krzysztof Matyjaszewski
- Department
of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
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653
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Zhang M, Yuan W, Yao B, Li C, Shi G. Solution-processed PEDOT:PSS/graphene composites as the electrocatalyst for oxygen reduction reaction. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3587-3593. [PMID: 24456474 DOI: 10.1021/am405771y] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Composites of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and reduced graphene oxide (rGO) have been prepared by solution mixing and applied as electrocatalysts for oxygen reduction reaction (ORR) after treatment with concentrated H2SO4. The blending of rGO induces the conformational change of PEDOT chains from benzoid to quionoid structure and charge transfer from rGO to PEDOT. H2SO4 post-treatment can remove part of insulating PSS from the surface of the PEDOT:PSS/rGO composite film, resulting in a significant conductivity enhancement of the composite. This synergistic effect makes the H2SO4-treated PEDOT:PSS/rGO composite a promising catalyst for ORR. It exhibits enhanced electrocatalytic activity, better tolerance to a methanol crossover effect and CO poisoning, and longer durability than those of the platinum/carbon catalyst.
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Affiliation(s)
- Miao Zhang
- Department of Chemistry and Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Tsinghua University , Beijing 100084, China
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654
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Wu D, Li Z, Zhong M, Kowalewski T, Matyjaszewski K. Templated Synthesis of Nitrogen-Enriched Nanoporous Carbon Materials from Porogenic Organic Precursors Prepared by ATRP. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201309836] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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655
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Zhang L, Zhang W, Serp P, Sun WH, Durand J. Ethylene Polymerization Catalyzed by Pyrene-Tagged Iron Complexes: The Positive Effect of π-Conjugation and Immobilization on Multiwalled Carbon Nanotubes. ChemCatChem 2014. [DOI: 10.1002/cctc.201301063] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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656
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Wu D, Li Z, Zhong M, Kowalewski T, Matyjaszewski K. Templated Synthesis of Nitrogen-Enriched Nanoporous Carbon Materials from Porogenic Organic Precursors Prepared by ATRP. Angew Chem Int Ed Engl 2014; 53:3957-60. [DOI: 10.1002/anie.201309836] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Indexed: 11/09/2022]
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657
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Li X, Wang Y, Kang L, Zhu M, Dai B. A novel, non-metallic graphitic carbon nitride catalyst for acetylene hydrochlorination. J Catal 2014. [DOI: 10.1016/j.jcat.2013.12.006] [Citation(s) in RCA: 131] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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658
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Wang H, Kong Q, Wang Y, Deng T, Chen C, Hou X, Zhu Y. Graphene Oxide Catalyzed Dehydration of Fructose into 5-Hydroxymethylfurfural with Isopropanol as Cosolvent. ChemCatChem 2014. [DOI: 10.1002/cctc.201301067] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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659
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Dathar GKP, Tsai YT, Gierszal K, Xu Y, Liang C, Rondinone AJ, Overbury SH, Schwartz V. Identifying active functionalities on few-layered graphene catalysts for oxidative dehydrogenation of isobutane. CHEMSUSCHEM 2014; 7:483-491. [PMID: 24464945 DOI: 10.1002/cssc.201301006] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 11/12/2013] [Indexed: 06/03/2023]
Abstract
The general consensus in the studies of nanostructured carbon catalysts for oxidative dehydrogenation (ODH) of alkanes to olefins is that the oxygen functionalities generated during synthesis and reaction are responsible for the catalytic activity of these nanostructured carbons. Identification of the highly active oxygen functionalities would enable engineering of nanocarbons for ODH of alkanes. Few-layered graphenes were used as model catalysts in experiments to synthesize reduced graphene oxide samples with varying oxygen concentrations, to characterize oxygen functionalities, and to measure the activation energies for ODH of isobutane. Periodic density functional theory calculations were performed on graphene nanoribbon models with a variety of oxygen functionalities at the edges to calculate their thermal stability and to model reaction mechanisms for ODH of isobutane. Comparing measured and calculated thermal stability and activation energies leads to the conclusion that dicarbonyls at the zigzag edges and quinones at armchair edges are appropriately balanced for high activity, relative to other model functionalities considered herein. In the ODH of isobutane, both dehydrogenation and regeneration of catalytic sites are relevant at the dicarbonyls, whereas regeneration is facile compared with dehydrogenation at quinones. The catalytic mechanism involves weakly adsorbed isobutane reducing functional oxygen and leaving as isobutene, and O2 in the feed, weakly adsorbed on the hydrogenated functionality, reacting with that hydrogen and regenerating the catalytic sites.
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Affiliation(s)
- Gopi Krishna Phani Dathar
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, One Bethel Valley Road Oak Ridge, TN 37831 (USA)
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660
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Lu J, Yang L, Xu B, Wu Q, Zhang D, Yuan S, Zhai Y, Wang X, Fan Y, Hu Z. Promotion Effects of Nitrogen Doping into Carbon Nanotubes on Supported Iron Fischer–Tropsch Catalysts for Lower Olefins. ACS Catal 2014. [DOI: 10.1021/cs400931z] [Citation(s) in RCA: 185] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Jinzhao Lu
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Lijun Yang
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Bolian Xu
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Qiang Wu
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Dong Zhang
- Department
of Physics, Southeast University, Nanjing 210096, China
| | - Shijun Yuan
- Department
of Physics, Southeast University, Nanjing 210096, China
| | - Ya Zhai
- Department
of Physics, Southeast University, Nanjing 210096, China
| | - Xizhang Wang
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Yining Fan
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Zheng Hu
- Key
Laboratory of Mesoscopic Chemistry of the Ministry of Education and
Jiangsu Provincial Lab for Nanotechnology, Institute of Theoretical
and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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661
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Moussa SO, Panchakarla LS, Ho MQ, El-Shall MS. Graphene-Supported, Iron-Based Nanoparticles for Catalytic Production of Liquid Hydrocarbons from Synthesis Gas: The Role of the Graphene Support in Comparison with Carbon Nanotubes. ACS Catal 2014. [DOI: 10.1021/cs4010198] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Sherif O. Moussa
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Leela S. Panchakarla
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Minh Q. Ho
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - M. Samy El-Shall
- Department of Chemistry, Virginia Commonwealth University, Richmond, Virginia 23284, United States
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662
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Sun X, Li B, Su D. Revealing the nature of the active site on the carbon catalyst for C–H bond activation. Chem Commun (Camb) 2014; 50:11016-9. [DOI: 10.1039/c4cc02841d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The single ketone group is determined to be the active site in ODH.
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Affiliation(s)
- XiaoYing Sun
- Shenyang National Laboratory for Materials Science
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang 110016, China
| | - Bo Li
- Shenyang National Laboratory for Materials Science
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang 110016, China
| | - Dangsheng Su
- Shenyang National Laboratory for Materials Science
- Institute of Metal Research
- Chinese Academy of Sciences
- Shenyang 110016, China
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663
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Chen W, Ji J, Duan X, Qian G, Li P, Zhou X, Chen D, Yuan W. Unique reactivity in Pt/CNT catalyzed hydrolytic dehydrogenation of ammonia borane. Chem Commun (Camb) 2014; 50:2142-4. [DOI: 10.1039/c3cc48027e] [Citation(s) in RCA: 189] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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664
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Bhattacharya T, Majumdar B, Dey D, Sarma TK. Ultrasound mediated synthesis of α-aminophosphonates and 3,4-dihydropyrimidin-2-ones using graphene oxide as a recyclable catalyst under solvent-free conditions. RSC Adv 2014. [DOI: 10.1039/c4ra08533g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Graphene oxide functions as an effective and reusable carbocatalyst for the multicomponent synthesis of α-aminophosphonates and 3,4-dihydropyrimidinones under solvent-free conditions using ultrasonic irradiation.
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Affiliation(s)
- Tamalika Bhattacharya
- Discipline of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Biju Majumdar
- Discipline of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Deepa Dey
- Discipline of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
| | - Tridib K. Sarma
- Discipline of Chemistry
- School of Basic Sciences
- Indian Institute of Technology Indore
- Indore 452017, India
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665
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Kumar R, Lee YO, Bhalla V, Kumar M, Kim JS. Recent developments of thiacalixarene based molecular motifs. Chem Soc Rev 2014; 43:4824-70. [DOI: 10.1039/c4cs00068d] [Citation(s) in RCA: 207] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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666
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Lu J, Bao Y, Su CL, Loh KP. Properties of strained structures and topological defects in graphene. ACS NANO 2013; 7:8350-8357. [PMID: 24143926 DOI: 10.1021/nn4051248] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Strain and defect engineering of graphene can modify the topological features of electronic states, leading to novel properties such as pseudomagnetism in bubbles and metallicity in extended topological defects. A consequence of graphene being a soft membrane is that it can be strain-engineered to become highly corrugated by modifying its adhesion to the substrate. Extended grain boundaries in graphene can be constructed from periodic combinations of nonhexagonal rings (5-7 pairs). However, a controlled method of producing these defects is not currently available. In this Perspective, we discuss some of the recent advances in studying the properties and formation mechanisms of strained structures and defects in graphene, extending across both physics and chemistry.
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Affiliation(s)
- Jiong Lu
- Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543
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667
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668
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Alegre C, Gálvez ME, Moliner R, Baglio V, Stassi A, Aricò AS, Lázaro MJ. Platinum Ruthenium Catalysts Supported on Carbon Xerogel for Methanol Electro-Oxidation: Influence of the Catalyst Synthesis Method. ChemCatChem 2013. [DOI: 10.1002/cctc.201300542] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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