Katz, Alexander - University of California, Berkeley - Chemical & Biomolecular Engineering

个人简介

B.S. University of Minnesota, (1992); M.S. University of Minnesota, (1994); Ph.D. California Institute of Technology (1999).

研究领域

Molecular Engineering of Single-Site Solid Catalysts and Functional Materials We are a catalysis group that focuses on understanding how catalysts functions given a certain molecular active-site structure. This approach enables and is invaluable to the rational design of catalysts for emerging applications. These applications require catalysts of high activity and selectivity whereas conventional approaches often optimize one at the expense of the other. Our group is currently active in four areas: Grafted metallocalixarene sites on inorganic-oxide surfaces, where the calixarene enforces site isolation as well as an optimized coordination geometry surrounding the metal atom; Supported molecular metal clusters bound with calixarenes, where the calixarene enforces accessibility to open sites on the metal surface while preventing aggregation via coalescence; Use of weak-acid sites on surfaces for biomass depolymerization, where high activity, selectivity, and lack of leaching even in the presence of metal salts can be obtained in a manner not possible with strong acids; and Delaminated zeolites, where the high external surface area enables reactions with bulky molecules that conventionally could not fit inside a zeolitic micropore. The role of the zeolite framework in these materials is to template a preferential coordination environment surrounding a Lewis-acid metal heteroatom site for catalysis, which cannot be accomplished with conventional amorphous materials, which lack framework rigidity and order of the crystalline material. We are also active in a fifth area that deals with assembly of complex organic-inorganic interfaces, which are geared for stabilizing systems that are applicable to coatings.

近期论文

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Heteroatom-Tolerant Delamination of Layered Zeolite Precursor Materials; by I. Ogino, E. A. Eilertsen, S. Hwang, T. Rea, D. Xie, X. Ouyang,S. I. Zones and A. Katz*, Chem. Mater. , 2013, 25 (9), 1502–1509 DOI: 10.1021/cm3032785 http://dx.doi.org/10.1021/cm3032785 Accessible gold clusters using calix[4]arene N-heterocyclic carbene and phosphine ligands; by M. M. Nigra, A. J. Yeh, A. Okrut, A.G. DiPasquale, S.W. Yeh, A. Solovyov and A. Katz* Dalton Trans., 2013, 42 12762-12771. DOI: 10.1039/C3DT50804H http://pubs.rsc.org/en/content/articlelanding/2013/dt/c3dt50804h Identification of site requirements for reduction of 4-nitrophenol using gold nanoparticle catalysts; by M.M. Nigra, J. Ha and A. Katz* Catal. Sci. Technol, 2013, Advance Article DOI: 10.1039/C3CY00298E http://pubs.rsc.org/en/Content/ArticleLanding/2013/CY/c3cy00298e Understanding the Role of Defect Sites in Glucan Hydrolysis on Surfaces; by O. M. Gazit and A. Katz J. Am. Chem., Soc., 2013 135 (11) , 4398–4402 DOI: 10.1021/ja311918z http://dx.doi.org/10.1021/ja311918z Catalytic consequences of open and closed grafted Al(III)-calix[4]arene complexes for hydride and oxo transfer reactions; P. Nandi, W. Tang, A. Okrut, X. Kong, S. Hwang, M. Neurock, and A. Katz, PNAS, 2012 110, 2484-2489 http://www.pnas.org/content/early/2013/01/25/1211158110.full.pdf+html Gold nanoparticle-catalyzed reduction in a model system: Quantitative determination of reactive heterogeneity of a supported nanoparticle surface; by M. M. Nigra, I. Arslan, and A. Katz J. Catal., 2012 295, 115–121 http://www.sciencedirect.com/science/article/pii/S0021951712002345 Glucan Adsorption on Mesoporous Carbon Nanoparticles: Effect of Chain Length and Internal Surface; by P. Chung*, A. Charmot, O.M. Gazit, and A. Katz* Langmuir, 2012 28 (43), 15222–15232 DOI: 10.1021/la3030364 http://dx.doi.org/10.1021/la3030364 “Structures and Stability of Irn(CO)m“ by M. Chen, J.E. Dyer, B.C. Gates, A. Katz & D.A. Dixon, Molecular Physics: An International Journal at the Interface Between Chemistry and Physics, 2012, 110, 15-13. To link to this invited article: http://dx.doi.org/10.1080/00268976.2012.703885 “Chemisorption and Dehydration of Ethanol on Silica: Effect of Temperature on Selectivity” by T. Luts and A. Katz*, Topics in Catalysis, 2012, 55, 84.92. "Stabilization of coordinatively unsaturated Ir4 clusters with bulky calix[4]arene phosphine ligands: A comparative study of mechanical and chemical effects" by A. Okrut, O.M. Gazit, N. de Silva, R. Nichiporuk, A. Solovyov, and A. Katz*, Dalton Trans., 2012, 41, 2091-2099, DOI: 10.1039/C1DT11734C. This publication has been highlighted as a Hot Article at http://blogs.rsc.org/dt/2012/01/05/hot-article-coordinatively-unsaturated-iridium-clusters/ and is available on the web at http://pubs.rsc.org/en/content/articlelanding/2012/dt/c1dt11734c. “Grafted Poly(1→4-β-glucan) Strands on Silica: A Comparative Study of Reactivity as a Function of Grafting Density” by O.M. Gazit and A. Katz*, Langmuir, 2012, 28 (1), 431-437. DOI: 10.1021/la2036482. This publication is available on the web at http://pubs.acs.org/doi/abs/10.1021/la2036482. “Silica Supported Aminoxyls as Reactive Materials for NOx Removal” by T. Luts, E. Iglesia, and A. Katz*, Journal of Materials Chemistry 2011, 21, 982-990. This publication has been highlighted as a Hot Article at http://blogs.rsc.org/jm/2010/12/02/hot-article-nox-removal-via-cascade-reactions-using-silica-and-aminoxyls/ “Nonaqueous Fluoride/Chloride Anion-Promoted Delamination of Layered Zeolite Precursors: Exfoliation of PREFER” by E.A. Eilertsen, I. Ogino, S-J. Hwang, T. Rea, S. Yeh, S.I. Zones, and A. Katz*, Chem. Mater. 2011, 23, 5404-5408. “MPV Reduction Using AlIII-Calix[4]arene Lewis Acid Catalysts: Molecular-Level Insight Into Effect of Ketone Binding” by P. Nandi, Y.I. Matvieiev, V.I. Boyko, K.A. Durkin, V.I. Kalchenko, and A. Katz*, J. Cat. 2011, 284, 42-49. Ogino, I.; Nigra, M.M.; Hwang, S-J.; Ha, J-M.; Rea, T.; Zones, S., and Katz, A.; Delamination of Layered Zeolite Precursors under Mild Conditions: Synthesis of UCB-1 via Fluoride/Chloride Anion-Promoted Exfoliation, J. Am. Chem. Soc.., 2011, DOI: 10.1021/ja111147z (Article ASAP). Gazit, O.M.; Charmot, A.; Katz, A.; Grafted cellulose strands on the surface of silica: effect of environment on reactivity, Chem. Comm., 2011, 47, 376-378. Charmot, A.; and Katz, A.; Unexpected phosphate salt-catalyzed hydrolysis of glycosidic bonds in model disaccharides: Cellobiose and maltose, 2010, J. Catal., 276, 1-5. de Silva, N.; Ha, J.-M.; Solovyov, A.; Nigra, M.M.; Ogino, I.; Yeh, S.W;. Durkin, K.A.; and Katz, A.; A bioinspired approach for controlling accessibility in calix[4]arene-bound metal cluster catalysts, Nature Chem., 2010, 2, 1062-1068. Ha, J.-M.; Soloyyov, A.; and Katz, A.; Accessibility in Calix[8]arene-Bound Gold Nanoparticles: Crucial Role of Induced-Fit Binding, J. Phys. Chem. C, 2010, 114, 16060-16070. de Silva, N.; Solovyov, A.; and Katz, A.; Patterned metal polyhedra using calixarenes as organizational scaffolds: Ir-4-based cluster assemblies, Dalton Trans., 2010, 39, 2194-2197. Ha, J.-M.; Solovyov, A.; and Katz, A.; Synthesis and Characterization of Accessible Metal Surfaces in Calixarene-Bound Gold Nanoparticles, Langmuir, 2009, 25, 10548-10553. de Silva, N.; Hwang, S.-J.; Durkin, K. A. and Katz, A.; Vanadocalixarenes on Silica: Requirements for Permanent Anchoring and Electronic Communication, Chem. Mater., 2009, 21, 1852-1860.