• 2 hours Airlines Could Recover, But Crew Remain Elusive
  • 2 hours Meet The Man Behind The World's Most Exciting Oil Play
  • 1 day Crypto-Mining Immigration Could Be The Start Of A New Trend
  • 3 days Hawkish Fed Sends Gold Prices Crashing
  • 4 days Bezos Is Heading To Space This Sunday
  • 7 days El Salvador’s Surprise Bitcoin Move
  • 10 days Markets Unfazed As Inflation Hits 13-Year High
  • 11 days How the Token Economy is Disrupting Financial Markets
  • 13 days FBI Investigating 100 Types Of Ransomware Attacks
  • 15 days Fed Ends Corporate Credit Emergency Lending Program
  • 17 days AMC Becomes the Latest Winning Meme Stock After GameStop
  • 19 days The Real Reason Your 401k Has Been Lagging
  • 19 days China Lifts Cap On Births, Allows Three Children Per Couple
  • 21 days The Market Is Ripe For Another GameStop Saga
  • 24 days Senate Grills Big Banks Over Pandemic Opportunism
  • 26 days Cannabis Has A Major Cash Problem
  • 26 days Ransomware Netted Criminals $350M In 2020 Alone
  • 27 days Russia Is Taking On Google
  • 28 days Chinese Regulators Deal Another Big Blow To Bitcoin
  • 29 days Ohio Residents Brave Vaccine for Chance To Win $1M
Is A Global Currency Necessary?

Is A Global Currency Necessary?

Investors at all levels, spurred…

Ethical Investors Fight For A Greener Mining Industry

Ethical Investors Fight For A Greener Mining Industry

Miners face greater scrutiny from…

Mining.com

Mining.com

Mining.com

MINING.com is a web-based global mining publication focusing on news and commentary about mining and mineral exploration. The site is a one-stop-shop for mining industry…

Contact Author

  1. Home
  2. Commodities
  3. Other

Cobalt May Be The Key To Clean Hydrogen Fuel

Hydrogen

A research team from the Tokyo Institute of Technology created the first visible-light photoanode made of titanium dioxide or TiO2 enhanced with cobalt. The anode is a key element needed to achieve affordable water splitting to produce hydrogen, a clean alternative to fossil fuel.

In a paper published in the journal ACS Applied Materials & Interfaces, the researchers explain that photoelectrochemical water splitting, the process by which light energy is used to split water molecules into hydrogen and oxygen is a promising approach to obtain pure hydrogen for use as an alternative clean fuel.

The process is carried out in electrochemical cells that contain an anode and a cathode submerged in water, which are connected through an external circuit. At the anode, water oxidation occurs, whereby O2 is produced by drawing energy from light waves. These waves transfer energy to the electrons of the anode material, allowing them to move through the external circuit to reach the cathode. Here, the received electrons and the cathode material cause H2 to form.

According to the team, to date, it has been difficult to find photoelectrochemical systems that carry this process efficiently. One of the reasons for this is that titanium dioxide, which is a well-known and widely used photoanode material, can only absorb energy from high-energy light.

Sometimes, TiO2 is mixed with gold and silver to sensitize it to visible light but, as a result, the application becomes expensive.

However, by enhancing the TiO2 with cobalt, it is possible to create a visible-light photoanode.

To do so, thin TiO2 films are grown onto a substrate through a standard procedure and then cobalt is introduced by immersing them into an aqueous cobalt nitrate solution.

This method works because cobalt domains not only capture visible light and transfer charges or electrons at the TiO2 interface but also serve as catalytic sites that facilitate water oxidation.

Moreover, the researchers found that the structure of the base TiO2 thin film affects the performance of the final modified photoanode, presumably by allowing for the accommodation of cobalt atoms. The structure of the TiO2 film can be easily tuned by adjusting fabrication parameters, which allowed the team to carry out multiple tests to gain insight into this phenomenon.

“This study demonstrates that a visible-light-driven photoelectrochemical cell for water oxidation can be constructed through the use of earth-abundant metals without the need for complicated preparation procedures,” Kazuhiko Maeda, senior author of the study, said in a media statement.

By Mining.com 

More Top Reads From Safehaven.com:

Back to homepage

Leave a comment

Leave a comment