Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Energy from Light and Water

Hitting water with a 2 iron: A novel nanophotocathode for hydrogen production that is based on a multilayer array of InP quantum dots activated with a synthetic diiron catalyst, which is related to the subsite of FeFe hydrogenase.
Hitting water with a 2 iron: A novel nanophotocathode for hydrogen production that is based on a multilayer array of InP quantum dots activated with a synthetic diiron catalyst, which is related to the subsite of FeFe hydrogenase.

Abstract:
New photocatalytic method for the clean production of hydrogen from water

Energy from Light and Water

Weinheim, Germany | Posted on February 9th, 2010

Hydrogen-powered fuel cells and solar energy are the best hope for a more environmentally friendly and resource-sparing energy supply in the future. A combination of the two is considered to be particularly "clean": the production of hydrogen by splitting water with sunlight. Previous approaches to this have suffered from high costs and the limited lifetime of their catalytic systems. In the journal Angewandte Chemie, a team led by Thomas Nann and Christopher J. Pickett at the University of East Anglia (Norwich, UK) has now introduced an efficient, robust photoelectrode made of common, inexpensive materials.

The new system consists of a gold electrode that is covered with layers of indium phosphide (InP) nanoparticles. The researchers then introduce an iron-sulfur complex, [Fe2S2(CO)6], into the layered arrangement. When submerged in water and irradiated with light under a relatively small electric current, this photoelectrocatalytic system produces hydrogen with an efficiency of 60%. "This relatively high efficiency is a breakthrough," says Nann.

The researchers have proposed the following mechanism for the reaction: The incoming light particles are absorbed by the InP nanocrystals and excite electrons within the InP. In this excited state, the electrons can be transferred to the iron-sulfur complexes. In a catalytic reaction, the iron-sulfur complexes then pass their electrons on to hydrogen ions (H+) in the surrounding water, which are then released in the form of hydrogen (H2). The gold electrode supplies the necessary electrons to replenish the InP nanocrystals.

In contrast to current processes, the new system works without organic molecules. These must be converted into an excited state to react, which causes them to degrade over time. This problem limits the lifetime of systems with organic components. The new system is purely inorganic and lasts correspondingly longer. "Our newly developed photocatalytic electrode system is robust, efficient, inexpensive, and free of toxic heavy metals," according to Nann. "It may be a highly promising alternative for industrial hydrogen production."

Author: Thomas Nann, University of East Anglia, Norwich (UK), www.uea.ac.uk/che/people/faculty/nannt

Title: Water Splitting by Visible Light: A Nanophotocathode for Hydrogen Production

Angewandte Chemie International Edition, Permalink: dx.doi.org/10.1002/anie.200906262

####

About Wiley InterScience
Wiley InterScience (www.interscience.wiley.com) provides access to over 3 million articles across nearly 1500 journals and 7000 Online Books and major reference works. It also holds industry leading databases such as The Cochrane Library, chemistry databases and the acclaimed Current Protocols laboratory manuals.

Wiley InterScience is one of the world's premiere resources for study, teaching and advanced research.

For more information, please click here

Contacts:
Editorial office


Amy Molnar (US)


Jennifer Beal (UK)


Alina Boey (Asia)

Copyright © Wiley InterScience

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 News Press

News and information

Iranian Researchers Synthesize Stable Ceramic Nanopowders at Room Temperature September 20th, 2014

Arrowhead to Present at BioCentury's NewsMakers in the Biotech Industry Conference September 19th, 2014

SouthWest NanoTechnologies (SWeNT) Receives NIST Small Business Innovation Research (SBIR) Phase 1 Award to Produce Greater than 99% Semiconducting Single-Wall Carbon Nanotubes September 19th, 2014

Toward optical chips: A promising light source for optoelectronic chips can be tuned to different frequencies September 19th, 2014

Announcements

Iranian Scientists Separate Zinc Ion at Low Concentrations September 20th, 2014

Arrowhead to Present at BioCentury's NewsMakers in the Biotech Industry Conference September 19th, 2014

SouthWest NanoTechnologies (SWeNT) Receives NIST Small Business Innovation Research (SBIR) Phase 1 Award to Produce Greater than 99% Semiconducting Single-Wall Carbon Nanotubes September 19th, 2014

Toward optical chips: A promising light source for optoelectronic chips can be tuned to different frequencies September 19th, 2014

Energy

Iranian Researchers Synthesize Stable Ceramic Nanopowders at Room Temperature September 20th, 2014

IEEE International Electron Devices Meeting To Celebrate 60th Anniversary as The Leading Technical Conference for Advanced Semiconductor Devices September 18th, 2014

Rice rolls 'neat' nanotube fibers: Rice University researchers' acid-free approach leads to strong conductive carbon threads September 15th, 2014

Simple, Cost-Effective Method Proposed for Synthesizing Zinc Oxide Nanopigments September 15th, 2014

Fuel Cells

Iranian Researchers Synthesize Stable Ceramic Nanopowders at Room Temperature September 20th, 2014

Media Advisory: Minister Rempel to Announce Support for Alberta's Nanotechnology Sector June 20th, 2014

Evolution of a Bimetallic Nanocatalyst June 6th, 2014

University of Surrey collaborates with India and Tata Steel to revolutionise renewable energy March 26th, 2014

Quantum Dots/Rods

Nano-pea pod model widens electronics applications: A new theoretical model explains how a nanostructure, such as the nano-pea pod, can exhibit localised electrons September 4th, 2014

Interaction between Drug, DNA for Designing Anticancer Drugs Studied in Iran August 17th, 2014

NANOPARTICLES INDIA August 8th, 2014

Researchers create quantum dots with single-atom precision June 30th, 2014

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







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE