Abstract
co-gelation sol-gel method. Addition order of the components is varied in three different ways in order to study the effect
on the properties of hierarchically porous 1Cr/C monolithic materials. The materials are characterized by nitrogen sorption,
X-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman spectroscopy. The results show a three-dimensional
network of disordered carbon with chromium nanoparticles of sizes ranging from 20 nm to 0.5 ?m. The carbon structure was
retained at the macropore level, but not at the mesoscale where the ordered mesopores were lost on chromium addition. The
chromium nanoparticles were observed to grow on the surface of the ligaments as well as in the carbon matrix. A few significant
differences were observed in final materials on varying the addition order during the synthesis in terms of pore size distribution,
particle size distribution, and graphitic nature of the final carbon, etc.
Keywords
Full Text:
References
Armbruster, M., Kovnir, K., Friedrich, M. et al. Al13Fe4 as a low-cost alternative for palladium in heterogeneous hydrogenation [J]. Natural Material, 2012, 11:690–693.
Valkenberg, M.H., deCastroa, C. and Holdericha, W.F. Immobilisation of ionic liquids on solid supports [J]. Green Chemistry, 2002, 4:88–93.
Ilkeun, L., Manuel, A.A., Qiao, Z. et al. New nanostructured heterogeneous catalysts with increased selectivity and stability [J]. Physical Chemistry Chemical Physics, 2011, 13:2449–56.
Alexis, T.B. The impact of nanoscience on heterogeneous catalysis [J]. Science, 2003, 299(5613):1688–91.
Wankhade, A.V., Gaikwad, G.S., Dhonde, M.G., et al. Removal of organic pollutant from water by terogeneous
photocatalysis: a review [J]. Research Journal of Chemistry and Environment, 2013, 17(1):84–94.
Pratibha, L.G., Edward, D.B., Helveg, S. et al. Atomic-resolution environmental transmission electron microscopy for probing gas–solid reactions in heterogeneous catalysis [J]. Material Science Society Bulletin, 2007, 32(12):1044–50.
John, H.S. Heterogeneous catalysis: some recent developments [J]. Science, 1977, 195(4279): 641–6.
Singh, A. and Spiccia, L. Water oxidation catalysts based on abundant 1st row transition metals [J]. Coordination Chemistry Reviews, 2013, 257(17):2419–22.
Yugen, Z. and Siti, N.R. Functional porous organic polymers for heterogeneous catalysis [J]. Chemical Society Reviews, 2012, 41:2083–94.
Bachiller-Baezaa, B., Guerrero-Ruizb, A. and Rodr?guez-Ramos, I. Role of the residual chlorides in platinum and ruthenium catalysts for the hydrogenation of a, b-unsaturated aldehydes [J]. Applied Catalysis A: General, 2000, 192(2):289–297.
Bohua, W., Yinjie, K., Xiaohua, Z. et al. Noble metal nanoparticles/carbon nanotubes nanohybrids: synthesis and applications [J]. Nanotoday, 2011, 6(1):75–90.
Zhen-Bo, W., Peng-Jian, Z., Guang-Jin, W., et al. Effect of Ni on PtRu/C catalyst performance for ethanol
electrooxidation in acidic medium [J]. Journal of Physical Chemistry C, 2008, 112(16):6582–87.
Lepro, X., Terres, E., Vega-Cantu, Y. et al. Efficient anchorage of Pt clusters on N-doped carbon nanotubes and their catalytic activity [J]. Chemical Physics Letters, 2008, 463(1):124–9.
Tundo, P., Perosa, A. and Zinovyev, S. Modifier effects on Pt/C, Pd/C, and Raney-Ni catalysts in multiphase catalytic hydrogenation systems [J]. Journal of Molecular Catalysis A: Chemical, 2003, 204–5: 747–754.
Lipshutz, B.H., Sclafani, J.A. and Blomgren, P.A. Biaryls via Suzuki Cross-Couplings Catalyzed by Nickel on Charcoal [J] Tetrahedron, 2000, 56(15):2139–44.
Upadhyay, S., Bagheri, S. and Hamid, S.B. A. Enhanced photoelectrochemical response of reduced-graphene
oxide/Zn1-xAgxO nanocomposite in visible-light region [J]. International Journal of Hydrogen Energy, 2014, 39: 11027–034.
Shen, Y., Zhao, P., Shao, Q., et al. In-situ catalytic conversion of tar using rice husk char-supported nickel-iron catalysts for biomass pyrolysis/gasification [J]. Applied Catalysis B: Environmental, 2014,152(1):140–151.
Rongqing, Y., Luwei, C., Qiping, L. et al. Platinum deposition on carbon nanotubes via chemical modification
[J]. Chemistry of Materials, 1998, 10(3): 718–22.
Chekin, F., Bagheri, S. and Hamid, S.B.A. Preparation and electrochemical performance of graphenee Pt
black nanocomposite for electrochemical methanol oxidation [J]. Journal of Solid State Electrochemistry,
, 18:893–8.
Xiao, Y., Jinliang, Y. and Bengt, S. Review on the properties of nano-/microstructures in the catalyst layer of PEMFC [J]. Journal of Fuel Cell Science and Technology, 2011, 8(3):1–13.
Rui, L., Xiqing, W., Xiang, Z. et al. Sulfonated ordered mesoporous carbon for catalytic preparation of biodiesel [J]. Carbon, 2008, 46(13): 1664–69.
Richard, R. S. Multiple metal carbon bonds for catalytic metathesis reactions (Nobel Lecture) [J]. Angewandte Chemie International Edition, 2006, 45(23):3748–59.
Baleizao, C., Corma, A., Garcia, H. et al. An oxime carbapalladacycle complex covalently anchored to
silica as an active and reusable heterogeneous catalyst for Suzuki cross-coupling in water [J]. Chemical
Communications, 2003, 2003:606–7.
Refbacks
- There are currently no refbacks.