August 13, 2013
VIP: DNA-Promoted Ultrasmall Pd Nanocrystals on Carbon Nanotubes: Towards Efficient Formic Acid Oxidation
Lian Ying Zhang, Chun Xian Guo, Hongchang Pang, Weihua Hu, Yan Qiao, and Chang Ming Li*
Immobilizing DNA on carbon nanotubes (CNTs) facilitates the growth of uniformly distributed, ultrasmall Pd nanocrystals with good crystalline structure, which results in the frabrication of a unique Pd-DNA@CNTs electrocatalyst. In comparison to Pd-CNTs and commercial Pd/C, the Pd-DNA@CNTs electrocatalyst exhibits a more negative oxidation peak potential, higher catalytic current density, lower charge-transfer resistance, and much better stability towards formic acid oxidation, thus providing great potential as a promising anode catalyst in direct formic acid fuel cells.
Received July 10, 2013, published online September 10, 2013, DOI: 10.1002/celc.201300095 – read now.
Recently Published Articles
- You have free access to this contentOxygen Reduction at Soft Interfaces Catalyzed by In Situ-Generated Reduced Graphene Oxide
Dr. Shokoufeh Rastgar, Haiqiang Deng, Dr. Fernando Cortés-Salazar, Dr. Micheál D. Scanlon, Medeya Pribil, Véronique Amstutz, Prof. Arkady A. Karyakin, Prof. Saeed Shahrokhian and Prof. Hubert H. Girault
Article first published online: 4 DEC 2013 | DOI: 10.1002/celc.201300140
Face to face: Flakes of reduced graphene oxide, synthesized in situ at the liquid/liquid interface from a graphene-oxide precursor, are capable of catalyzing the biphasic reduction of protons to hydrogen peroxide in the presence of molecular oxygen and an organic solubilized electron donor. This offers a new perspective for the bulk production of a green oxidant through biphasic electrolysis.
- You have free access to this contentLithium Insertion/Deinsertion Characteristics of Nanostructured Amorphous Tantalum Oxide Thin Films
Hoang X. Dang, Yong-Mao Lin, Kyle C. Klavetter, Trevor H. Cell, Prof. Adam Heller and Prof. C. Buddie Mullins
Article first published online: 2 DEC 2013 | DOI: 10.1002/celc.201300139
Nanosize matters: Nanostructured Ta2O5 thin films show high volumetric capacity at high Coulombic rates, and outperform a dense film of the same mass loading. The highly porous surface helps alleviate volume-change associated stresses and enables rapid Li solid-state diffusion, which was found to be the limiting step during lithium insertion/deinsertion for the dense film Ta2O5 anode.
- You have free access to this contentThe Effect of Interfacial Design on the Electrochemical Detection of DNA and MicroRNA Using Methylene Blue at Low-Density DNA Films
Roya Tavallaie, Dr. Nadim Darwish, Dr. Magdalena Gebala, Prof. D. Brynn Hibbert and Prof. J. Justin Gooding
Article first published online: 2 DEC 2013 | DOI: 10.1002/celc.201300136
Two mechanisms and one response: On low-density DNA films the electrochemical responses from methylene blue after hybridization is dependent on the orientation of the duplex (see picture). Decreasing the ability of duplex to bend toward the surface results in improving single base pair mismatch discrimination.
- You have free access to this contentScanning Photoelectron Microscopy Study of the Pt/Phosphoric-Acid-Imbibed Membrane Interface under Polarization
Dr. Won H. Doh, Dr. Luca Gregoratti, Dr. Matteo Amati, Dr. Spyridon Zafeiratos, Dr. Yeuk T. Law, Prof. Stylianos G. Neophytides, Alin Orfanidi, Dr. Maya Kiskinova and Prof. Elena R. Savinova
Article first published online: 26 NOV 2013 | DOI: 10.1002/celc.201300134
Current affairs: A model membrane-electrode assembly of a high-temperature polymer-exchange membrane fuel cell based on a phosphoric-acid-imbibed membrane is studied under polarization by using scanning photoelectron microscopy and spectroscopy, which reveals the Pt-catalyzed reduction of phosphoric acid to phosphorous acid and elemental phosphorus (see picture).
- You have free access to this contentHierarchically Ordered Tubular Titanium Dioxide Electrodes: Preparation, Electrochemical Characterization, and Application as a Bifunctional Catalyst
E. T. Deva Kumar and Dr. V. Ganesh
Article first published online: 26 NOV 2013 | DOI: 10.1002/celc.201300132
Busy as bees: Hierarchically ordered, close-packed, hexagonally arranged, honeycomb-structured porous, open-ended nanotubes arrays of TiO2 are prepared by a simple anodization process (see picture). Various parameters associated with the electrochemical anodization process are vital in tuning the wavelength of absorption of TiO2 to a wider region without adding any dopants or sensitizers.