Read the Beforeitsnews.com story here. Advertise at Before It's News here.
Profile image
By Alton Parrish (Reporter)
Contributor profile | More stories
Story Views
Now:
Last hour:
Last 24 hours:
Total:

New Artificial Leafs Produce Hydrogen from Water

% of readers think this story is Fact. Add your two cents.


The fossil fuel age is bound to end, for several strong reasons. As an alternative to fossil fuels, hydrogen seems very attractive. The gas has a huge energy density, it can be stored or processed further, e. g. to methane, or directly provide clean electricity via a fuel cell. If it is produced using sunlight alone, hydrogen is completely renewable with zero carbon emissions.

Artificial leafs

Similar to a process in natural photosynthesis, sunlight can also be used in “artificial leafs” to split water into oxygen and hydrogen. Artificial leafs combine photoactive semiconducting materials and can reach efficiencies beyond 15 %. However, those record efficiencies were obtained using expensive systems, which also tend to decompose in aqueous solutions. For successful commercialization costs need to go down and stability needs to increase.

Credit:  HZB
Good candidates with one disadvantage

Complex metal oxide semiconductors are good candidates for artificial leafs since they are relatively cheap and stable in aqueous solutions. Scientists from HZB-Institute for Solar Fuels focus their research on these materials. Until now, photoelectrodes based on metal oxides have shown moderate efficiencies (only
Heat treatment with hydrogen

One option to overcome this limitation is a heat treatment under hydrogen atmosphere of the metal oxide layers after deposition. Fatwa Abdi and his colleagues have now investigated how this treatment influences life spans, transport properties and defects in one of the most promising metal oxide photoelectrodes, bismuth vanadate (BiVO4).

Life spans of charge carriers doubled

Time-resolved conductivity measurements revealed that electrons and holes live more than twice as long in the bulk of the hydrogen-treated BiVO4 as compared to the pristine BiVO4. As a result, the overall photocurrent under sunlight is largely improved. Further measurements at Dresden and theoretical calculations by KAUST-colleagues in Saudi Arabia provided evidence that the presence of hydrogen in the metal oxide reduces or deactivates point defects in the bulk of BiVO4. “Our results show that hydrogen treatment leads to less traps for charge carriers and less opportunities to recombine or getting lost. So more charge carriers survive for longer and may contribute to water splitting”, Abdi explains.

Contacts and sources:
Fatwa Firdaus Abdi
Helmholtz-Zentrum Berlin Für Materialien und Energie

The results have been published in Advanced Energy Materials (August, 25th 2017): Enhancing Charge Carrier Lifetime in Metal Oxide Photoelectrodes through Mild Hydrogen Treatment (DOI: 10.1002/aenm.201701536) http://dx.doi.org/10.1002/aenm.201701536

Ji-Wook Jang, Dennis Friedrich, Sönke Müller, Marlene Lamers, Hannes Hempel, Sheikha Lardhi, Zhen Cao, Moussab Harb, Luigi Cavallo, René Heller, Rainer Eichberger, Roel van de Krol, and Fatwa F. Abdi*



Source: http://www.ineffableisland.com/2017/08/new-artificial-leafs-produce-hydrogen.html


Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world.

Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.

"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.

Please Help Support BeforeitsNews by trying our Natural Health Products below!


Order by Phone at 888-809-8385 or online at https://mitocopper.com M - F 9am to 5pm EST

Order by Phone at 888-388-7003 or online at https://www.herbanomic.com M - F 9am to 5pm EST

Order by Phone at 888-388-7003 or online at https://www.herbanomics.com M - F 9am to 5pm EST


Humic & Fulvic Trace Minerals Complex - Nature's most important supplement! Vivid Dreams again!

HNEX HydroNano EXtracellular Water - Improve immune system health and reduce inflammation

Ultimate Clinical Potency Curcumin - Natural pain relief, reduce inflammation and so much more.

MitoCopper - Bioavailable Copper destroys pathogens and gives you more energy. (See Blood Video)
Oxy Powder - Natural Colon Cleanser!  Cleans out toxic buildup with oxygen! 
Nascent Iodine - Promotes detoxification, mental focus and thyroid health.
Smart Meter Cover -  Reduces Smart Meter radiation by 96%!  (See Video)

Immusist Beverage Concentrate - Proprietary blend, formulated to reduce inflammation while hydrating and oxygenating the cells.

Report abuse
Loading...

    Comments

    Your Comments
    Question   Razz  Sad   Evil  Exclaim  Smile  Redface  Biggrin  Surprised  Eek   Confused   Cool  LOL   Mad   Twisted  Rolleyes   Wink  Idea  Arrow  Neutral  Cry   Mr. Green

    Total 1 comment
    • 2QIK4U

      Kaboom ✨💢

    MOST RECENT
    Load more ...

    SignUp

    Login

    Newsletter

    Email this story
    Email this story

    If you really want to ban this commenter, please write down the reason:

    If you really want to disable all recommended stories, click on OK button. After that, you will be redirect to your options page.