Fool's Gold Beats Platinum

  • ChemPubSoc Europe Logo
  • Author: Robert Hughes
  • Published Date: 17 August 2017
  • Source / Publisher: Chemistry – A European Journal/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
thumbnail image: Fool's Gold Beats Platinum

Related Societies

Iron pyrite or "Fool's Gold" (FeS2) has drawn a lot of research attention due to its abundance and useful properties, such as high optical absorbance and non-toxicity. It has wide-ranging applications from heavy-metal absorption to batteries to solar cells. Fine control over its morphology, however, remains difficult due to complicated reaction conditions and numerous side products.


Kevin C.-W. Wu, Kuo‐Chuan Ho, National Taiwan University, and colleagues have developed a method to make hollow iron pyrite nanoparticles (pictured). The multi-step process starts with Prussian Blue. Although better known as a blue pigment, it is also a useful iron cyanide reagent. The team first etched the Prussian Blue with acid to form hollow particles, followed by an oxidation to remove the organic components, and finally sulfurization to create hollow particles of iron pyrite.


To demonstrate the properties of the hollow material, it was tested as a counter electrode in a dye-sensitized solar cell, and compared with both solid pyrite and a commercially used platinum counter-electrode material. Hollow pyrite particles gave a photocurrent conversion efficiency (η) of 7.31 %, which is far superior to the 5.30 % of the solid pyrite. The η value is close to that of platinum (7.69 %), which demonstrates the nanoparticles' potential as a low-cost replacement for the expensive, scarce, precious metal.


 

Article Views: 1486

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH