Unprotected and interconnected Ru0nano-chain networks: advantages of unprotected surfaces in catalysis and electrocatalysis

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

Related collections

Most cited references 88

Record: found
Abstract: found
Article: not found

Anisotropic metal nanoparticles: Synthesis, assembly, and optical applications.

Catherine J Murphy, Tapan K. Sau, Anand M. Gole … (2005)

This feature article highlights work from the authors' laboratories on the synthesis, assembly, reactivity, and optical applications of metallic nanoparticles of nonspherical shape, especially nanorods. The synthesis is a seed-mediated growth procedure, in which metal salts are reduced initially with a strong reducing agent, in water, to produce approximately 4 nm seed particles. Subsequent reduction of more metal salt with a weak reducing agent, in the presence of structure-directing additives, leads to the controlled formation of nanorods of specified aspect ratio and can also yield other shapes of nanoparticles (stars, tetrapods, blocks, cubes, etc.). Variations in reaction conditions and crystallographic analysis of gold nanorods have led to insight into the growth mechanism of these materials. Assembly of nanorods can be driven by simple evaporation from solution or by rational design with molecular-scale connectors. Short nanorods appear to be more chemically reactive than long nanorods. Finally, optical applications in sensing and imaging, which take advantage of the visible light absorption and scattering properties of the nanorods, are discussed.

0 comments Cited 437 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: found
Article: not found

A bifunctional nonprecious metal catalyst for oxygen reduction and water oxidation.

Yelena Gorlin, Thomas F. Jaramillo (2010)

There is a growing interest in oxygen electrochemistry as conversions between O(2) and H(2)O play an important role in a variety of renewable energy technologies. The goal of this work is to develop active bifunctional catalyst materials for water oxidation and oxygen reduction. Drawing inspiration from a cubane-like CaMn(4)O(x), the biological catalyst found in the oxygen evolving center (OEC) in photosystem II, nanostructured manganese oxide surfaces were investigated for these reactions. Thin films of nanostructured manganese oxide were found to be active for both oxygen reduction and water oxidation, with similar overall oxygen electrode activity to the best known precious metal nanoparticle catalysts: platinum, ruthenium, and iridium. Physical and chemical characterization of the nanostructured Mn oxide bifunctional catalyst reveals an oxidation state of Mn(III), akin to one of the most commonly observed Mn oxidation states found in the OEC.

0 comments Cited 412 times – based on 0 reviews      Review now

Bookmark

Record: found
Abstract: found
Article: not found

Design and tailoring of the nanotubular arrayed architecture of hydrous RuO2 for next generation supercapacitors.

Chi-Chang Hu, Kuo-Hsin Chang, Ming-Champ Lin … (2006)

By use of the membrane-templated synthesis route, hydrous RuO2 (RuO2.xH2O) nanotubular arrayed electrodes were successfully synthesized by means of the anodic deposition technique. The desired three-dimensional mesoporous architecture of RuO2.xH2O nanotubular arrayed electrodes with annealing in air at 200 degrees C for 2 h simultaneously maintained the facility of electrolyte penetration, the ease of proton exchange/diffusion, and the metallic conductivity of crystalline RuO2, exhibiting unexpectedly ultrahigh power characteristics with its frequency "knee" reaching ca. 4.0-7.8 kHz, 20-40 times better than that of RuO2 single crystalline, arrayed nanorods. The specific power and specific energy of annealed RuO2.xH2O nanotubes measured at 0.8 V and 4 kHz is equal to 4320 kW kg-1 and 7.5 W h kg-1, respectively, demonstrating the characteristics of next generation supercapacitors.

0 comments Cited 383 times – based on 0 reviews      Review now

Bookmark

All references

Author and article information

Journal

Journal ID (publisher-id): CSHCBM

Title: Chem. Sci.

Abbreviated Title: Chem. Sci.

Publisher: Royal Society of Chemistry (RSC)

ISSN (Print): 2041-6520

ISSN (Electronic): 2041-6539

Publication date Created: 2016

Publication date (Print): 2016

Volume: 7

Issue: 5

Pages: 3188-3205

Article

DOI: 10.1039/C5SC04714E

SO-VID: 6620d9d6-0992-4fc3-9983-a786059ec4fc

History

Data availability:

Comments

Comment on this article

scite_

Cited by 21

See all cited by

- Version 1
- Version 1

Unprotected and interconnected Ru0nano-chain networks: advantages of unprotected surfaces in catalysis and electrocatalysis

Read this article at

Abstract

Related collections

CHAIN Network Collection

Most cited references 88

Anisotropic metal nanoparticles: Synthesis, assembly, and optical applications.

A bifunctional nonprecious metal catalyst for oxygen reduction and water oxidation.

Design and tailoring of the nanotubular arrayed architecture of hydrous RuO2 for next generation supercapacitors.

Author and article information

Journal

Article

History

Comments

Comment on this article

Similar content 2,027

Cited by 21