Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Search for future hydrogen storage materials extends to investigation of hydrogen interactions with metal nanoparticles

Figure 1: A schematic depiction of hydrogen storage of palladium (Pd) and platiunum (Pt) nanoparticles (green, hydrogen; red, Pd; blue Pt).

Reproduced with permission from Ref. 1  2008 by the American Chemical Society
Figure 1: A schematic depiction of hydrogen storage of palladium (Pd) and platiunum (Pt) nanoparticles (green, hydrogen; red, Pd; blue Pt).

Reproduced with permission from Ref. 1 2008 by the American Chemical Society

Abstract:
The environmental impact of the use of hydrocarbons as fuels has led to a global search for cleaner energy sources. Hydrogen offers a greener alternative for transportation fuels, but a critical issue is the requirement of a safe and reliable hydrogen storage medium. Nanoparticles have advantages over bulk materials for hydrogen storage applications: they have a larger solid/gas interface area and shorter hydrogen diffusion paths, yielding potentially faster kinetics for gas absorption and desorption.

Search for future hydrogen storage materials extends to investigation of hydrogen interactions with metal nanoparticles

Japan | Posted on April 26th, 2008

In two recent communications published in the Journal of the American Chemical Society, Masaki Takata from the SPring-8 Centre, Harima, and his colleagues, including Hiroshi Kitagawa from Kyushu University, explore the hydrogen absorption and desorption behavior of palladium nanoparticles and of palladium core-platinum shell nanoparticles.

In the first communication1, the researchers address whether core-shell nanoparticles made of two metals store hydrogen. The team prepared structures with crystalline palladium cores of 6 nm diameter and crystalline platinum shells of thickness around 2 nm, and then characterized them using a variety of techniques.

Pressure-composition isotherms showed that the core-shell nanoparticles absorbed the same amount of hydrogen as homogenous palladium nanoparticles. Takata, Kitagawa and colleagues then performed solid state nuclear magnetic resonance (NMR) measurements with deuterium, a hydrogen isotope, to identify the absorption site of hydrogen. Surprisingly, they have found that while deuterium was dispersed in both palladium and platinum lattices, it was concentrated in the boundary region between the core and the shell (Fig. 1).

Palladium nanoparticles do not demonstrate complete reversibility in their hydrogen uptake and release, in contrast to their bulk counterparts. Takata, Kitagawa and colleagues explored this hysteresis in their second communication2. Using x-ray diffraction, they have found that the lattice constant of palladium nanoparticles of 6 nm diameter increases with exposure to increased hydrogen pressures. However, on evacuation of the hydrogen, the lattice does not return to its original value; it remains slightly larger.

Then, again using solid state NMR measurements with deuterium, the researchers have found that some deuterium atoms remained within the palladium lattice after evacuation of free' deuterium from the system. They suggest that hydrogen atoms are trapped firmly within the lattice, which expands the crystal lattice, and hence lattice constant, of palladium. This, they say, explains why hydrogen absorption in these materials is not completely reversible.

The researchers conclude that their work provides a new understanding of the interactions between hydrogen and nano-structured' solids, and could contribute to the development of practical hydrogen-storage materials.
Reference

1. Kobayashi, H., Yamauchi, M., Kitagawa, H., Kubota, Y., Kato, K. & Takata, M. Hydrogen absorption in the core/shell interface of Pd/Pt nanoparticles. Journal of the American Chemical Society 130, 1818-1819 (2008).
2. Kobayashi, H., Yamauchi, M., Kitagawa, H., Kubota, Y., Kato, K. & Takata, M. On the nature of strong hydrogen atom trapping inside Pd nanoparticles. Journal of the American Chemical Society 130, 1828-1829 (2008). | article |

####

About Riken Research
RIKEN is one of Japans largest research organisations with institutes and centres in various locations in Japan (see http://www.riken.jp/engn/r-world/link/index.html). RIKENs 3000+ researchers publish several hundred research articles in top scientific and technical journals every year across a broad spectrum of disciplines in physics, chemistry, biology, medicine, earth science and in many areas of technology, and the number of articles is growing year on year.

For more information, please click here

Copyright © Riken Research

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

article 1

article 2

Related News Press

News and information

Harris & Harris Group Notes Announcements by Its Portfolio Companies During the Third Quarter of 2016 September 30th, 2016

INVECAS to Enable ASIC Designs for Tomorrows Intelligent Systems on GLOBALFOUNDRIES' FDX Technology: INVECAS to Collaborate with GLOBALFOUNDRIES to Provide IP and End-to-End ASIC Design Services on 22FDX and 12FDX Technologies September 30th, 2016

How to power up graphene implants without frying cells: New analysis finds way to safely conduct heat from graphene to biological tissues September 30th, 2016

Innovation in Nanotechnology is Focus of Symposium: Annual event brings international experts to Northwestern Oct. 6 September 29th, 2016

Discoveries

How to power up graphene implants without frying cells: New analysis finds way to safely conduct heat from graphene to biological tissues September 30th, 2016

Nanosensors could help determine tumors ability to remodel tissue: Measuring enzyme levels could help doctors select appropriate treatments September 29th, 2016

Fighting cancer with sticky nanoparticles September 27th, 2016

Gold nanoparticles conjugated quercetin inhibits epithelial-mesenchymal transition, angiogenesis and invasiveness via EGFR/VEGFR-2 mediated pathway in breast cancer September 27th, 2016

Announcements

Harris & Harris Group Notes Announcements by Its Portfolio Companies During the Third Quarter of 2016 September 30th, 2016

INVECAS to Enable ASIC Designs for Tomorrows Intelligent Systems on GLOBALFOUNDRIES' FDX Technology: INVECAS to Collaborate with GLOBALFOUNDRIES to Provide IP and End-to-End ASIC Design Services on 22FDX and 12FDX Technologies September 30th, 2016

How to power up graphene implants without frying cells: New analysis finds way to safely conduct heat from graphene to biological tissues September 30th, 2016

Innovation in Nanotechnology is Focus of Symposium: Annual event brings international experts to Northwestern Oct. 6 September 29th, 2016

Energy

Cambrios at CEATEC - Japan 2016 September 29th, 2016

Crystalline Fault Lines Provide Pathway for Solar Cell Current: New tomographic AFM imaging technique reveals that microstructural defects, generally thought to be detrimental, actually improve conductivity in cadmium telluride solar cells September 26th, 2016

Researchers at the Catalan Institute of Nanoscience and Nanotechnology show that bending semiconductors generates electricity September 26th, 2016

Semiconducting inorganic double helix: New flexible semiconductor for electronics, solar technology and photo catalysis September 15th, 2016

Fuel Cells

Carbon-coated iron catalyst structure could lead to more-active fuel cells September 15th, 2016

Imperial College use Kleindiek micromanipulators in their research into electrochemical energy devices September 6th, 2016

Iowa State engineers treat printed graphene with lasers to enable paper electronics September 2nd, 2016

Researchers reduce expensive noble metals for fuel cell reactions August 22nd, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic