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Showing 1 to 12 of 623 entries
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Role of the Three-Phase Boundary of the Platinum-Support Interface in Catalysis: A Model Catalyst Kinetic Study.

ACS catalysis

Papaioannou EI, Bachmann C, Neumeier JJ, Frankel D, Over H, Janek J, Metcalfe IS.
PMID: 27668125
ACS Catal. 2016 Sep 02;6(9):5865-5872. doi: 10.1021/acscatal.6b00829. Epub 2016 Jul 22.

A series of microstructured, supported platinum (Pt) catalyst films (supported on single-crystal yttria-stabilized zirconia) and an appropriate Pt catalyst reference system (supported on single-crystal alumina) were fabricated using pulsed laser deposition and ion-beam etching. The thin films exhibit area-specific...

Catalytic Mechanisms for Cofactor-Free Oxidase-Catalyzed Reactions: Reaction Pathways of Uricase-Catalyzed Oxidation and Hydration of Uric Acid.

ACS catalysis

Wei D, Huang X, Qiao Y, Rao J, Wang L, Liao F, Zhan CG.
PMID: 28890842
ACS Catal. 2017 Jul 07;7(7):4623-4636. doi: 10.1021/acscatal.7b00901. Epub 2017 Jun 15.

First-principles quantum mechanical/molecular mechanical (QM/MM)-free energy calculations have been performed to uncover how uricase catalyzes metabolic reactions of uric acid (UA), demonstrating that the entire reaction process of UA in uricase consists of two stages-oxidation followed by hydration. The...

Nanoscale Chemical Imaging of an Individual Catalyst Particle with Soft X-ray Ptychography.

ACS catalysis

Wise AM, Weker JN, Kalirai S, Farmand M, Shapiro DA, Meirer F, Weckhuysen BM.
PMID: 27076990
ACS Catal. 2016 Apr 01;6(4):2178-2181. doi: 10.1021/acscatal.6b00221. Epub 2016 Feb 26.

Understanding Fe deposition in fluid catalytic cracking (FCC) catalysis is critical for the mitigation of catalyst degradation. Here we employ soft X-ray ptychography to determine at the nanoscale the distribution and chemical state of Fe in an aged FCC...

Characterization and Engineering of the Adenylation Domain of a NRPS-Like Protein: A Potential Biocatalyst for Aldehyde Generation.

ACS catalysis

Wang M, Zhao H.
PMID: 24804152
ACS Catal. 2014 Apr 04;4(4):1219-1225. doi: 10.1021/cs500039v. Epub 2014 Mar 17.

The adenylation (A) domain acts as the first "gate-keeper" to ensure the activation and thioesterification of the correct monomer to nonribosomal peptide synthetases (NRPSs). Our understanding of the specificity-conferring code and our ability to engineer A domains are critical...

Palladium-Catalyzed C8-Selective C-H Arylation of Quinoline .

ACS catalysis

Stephens DE, Lakey-Beitia J, Atesin AC, Ateşin TA, Chavez G, Arman HD, Larionov OV.
PMID: 25580364
ACS Catal. 2015 Jan 02;5(1):167-175. doi: 10.1021/cs501813v.

We report herein a palladium-catalyzed C-H arylation of quinoline

Coordinated and Iterative Enzyme Catalysis in Fungal Polyketide Biosynthesis.

ACS catalysis

Hang L, Liu N, Tang Y.
PMID: 28529817
ACS Catal. 2016 Sep 02;6(9):5935-5945. doi: 10.1021/acscatal.6b01559. Epub 2016 Jul 27.

Fungal polyketides are natural products with great chemical diversity that exhibit a wide range of biological activity. This chemical diversity stems from specialized enzymes encoded in the biosynthetic gene cluster responsible for the natural product biosynthesis. Fungal polyketide synthases...

Carbon Support Surface Effects in the Gold-Catalyzed Oxidation of 5-Hydroxymethylfurfural.

ACS catalysis

Donoeva B, Masoud N, de Jongh PE.
PMID: 28989810
ACS Catal. 2017 Jul 07;7(7):4581-4591. doi: 10.1021/acscatal.7b00829. Epub 2017 May 31.

Oxidation of 5-hydroxymethylfurfural into 2,5-furandicarboxylic acid is an important transformation for the production of bio-based polymers. Carbon-supported gold catalysts hold great promise for this transformation. Here we demonstrate that the activity, selectivity, and stability of the carbon-supported gold nanoparticles...

Cyanobacterial aldehyde deformylase oxygenation of aldehydes yields n-1 aldehydes and alcohols in addition to alkanes.

ACS catalysis

Aukema KG, Makris TM, Stoian SA, Richman JE, Münck E, Lipscomb JD, Wackett LP.
PMID: 24490119
ACS Catal. 2013 Oct 04;3(10):2228-2238. doi: 10.1021/cs400484m.

Aldehyde-deformylating oxygenase (ADO) catalyzes O

Engineering of biocatalysts - from evolution to creation.

ACS catalysis

Quin MB, Schmidt-Dannert C.
PMID: 22125758
ACS Catal. 2011 Sep 02;1(9):1017-1021. doi: 10.1021/cs200217t.

Enzymes are increasingly being used in an industrial setting as a cheap and environmentally-friendly alternative to chemical catalysts. In order to produce the ideal biocatalyst, natural enzymes often require optimization to increase their catalytic efficiencies and specificities under a...

Photocatalytic Conversion of CO.

ACS catalysis

Andrade GA, Pistner AJ, Yap GP, Lutterman DA, Rosenthal J.
PMID: 24015374
ACS Catal. 2013 Aug 02;3(8):1685-1692. doi: 10.1021/cs400332y.

Harnessing of solar energy to drive the reduction of carbon dioxide to fuels requires the development of efficient catalysts that absorb sunlight. In this work, we detail the synthesis, electrochemistry and photophysical properties of a set of homologous

Copper/TEMPO-Catalyzed Aerobic Alcohol Oxidation: Mechanistic Assessment of Different Catalyst Systems.

ACS catalysis

Hoover JM, Ryland BL, Stahl SS.
PMID: 24558634
ACS Catal. 2013 Nov 01;3(11):2599-2605. doi: 10.1021/cs400689a.

Combinations of homogeneous Cu salts and TEMPO have emerged as practical and efficient catalysts for the aerobic oxidation of alcohols. Several closely related catalyst systems have been reported, which differ in the identity of the solvent, the presence of...

Chiral N-Heterocyclic Carbene Catalyzed Annulations of Enals and Ynals with Stable Enols: A Highly Enantioselective Coates-Claisen Rearrangement.

ACS catalysis

Mahatthananchai J, Kaeobamrung J, Bode JW.
PMID: 22468232
ACS Catal. 2012;2(2):494-503. doi: 10.1021/cs300020t. Epub 2012 Feb 29.

A combination of a chiral N-heterocyclic carbene catalyst and α,β-unsaturated aldehyde leads to a catalytically generated α,β-unsaturated acyl azolium, which participates in a highly enantioselective annulation to give dihydropyranone products. This full account of our investigations into the scope...

Showing 1 to 12 of 623 entries