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Cost-effective and efficient rival for platinum

February 18, 2015
Aalto University
Researchers have succeeded in creating an electrocatalyst that is needed for storing electric energy made of carbon and iron.


Researchers in Aalto University, Finland have succeeded in creating an electrocatalyst that is needed for storing electric energy made of carbon and iron.

A challenge that comes with the increased use of renewable energy is how to store electric energy.

Platinum has traditionally been used as the electrocatalyst in electrolysers that store electric energy as chemical compounds.

However, platinum is a rare and expensive metal. Now Aalto University researchers have succeeded in developing a substitute to it that is cheap and effective.

"We developed an electrocatalyst that is made of iron and carbon. Now the same efficiency that was achieved with platinum can be obtained with a less expensive material. Nearly 40 per cent of the material costs of energy storage with an electrolyser come from the electrocatalyst," says senior scientist Tanja Kallio.

The findings have just been published in the scientific journal Angewandte Chemie on 12 February 2015.

Losses decrease

The manufacturing process has been developed in cooperation with a research group led by Professor Esko Kauppinen from Aalto University School of Science. The carbon nanotube the group developed conducts electricity extremely well and serves as the support, while the now added only single carbon layer covered iron functions as the catalyst. The manufacturing process has a single stage.


In the manufacturing phase, the iron is covered with graphene.

"The method has been altered to make the electro catalyst very active. By active, we refer to the small amount of energy needed to store electric energy as hydrogen. This reduces the losses caused by chemical storage and the process is economically viable."

The research was conducted at the Aalto University School of Chemical Technology in groups led by Professor Kari Laasonen and Dr. Tanja Kallio in cooperation with Professor Esko Kauppinen. The research has been funded by the Aalto University AEF Programme (Aalto Energy Efficiency Research Programme).

Story Source:

Materials provided by Aalto University. Note: Content may be edited for style and length.

Journal Reference:

  1. Mohammad Tavakkoli, Tanja Kallio, Olivier Reynaud, Albert G. Nasibulin, Christoffer Johans, Jani Sainio, Hua Jiang, Esko I. Kauppinen, Kari Laasonen. Single-Shell Carbon-Encapsulated Iron Nanoparticles: Synthesis and High Electrocatalytic Activity for Hydrogen Evolution Reaction. Angewandte Chemie International Edition, 2015; DOI: 10.1002/anie.201411450

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Aalto University. "Cost-effective and efficient rival for platinum." ScienceDaily. ScienceDaily, 18 February 2015. <>.
Aalto University. (2015, February 18). Cost-effective and efficient rival for platinum. ScienceDaily. Retrieved September 24, 2023 from
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