Subscribe to our free daily newsletters
. 24/7 Space News .




Subscribe to our free daily newsletters



ENERGY TECH
Safe and inexpensive hydrogen production as a future energy source
by Staff Writers
Osaka, Japan (SPX) Dec 22, 2016


This image shows a) Gold nanoparticle catalyst (Au/HAP-NC), b) Images of gold nanoparticles (black dot in red circle) through Transmission Electron Microscope, c) Annular Dark Field of gold nanoparticles through Scanning Electron Microscope. Image courtesy Osaka University. For a larger version of this image please go here.

Hydrogen gas is a promising alternative energy source to overcome our reliance on carbon-based fuels, and has the benefit of producing only water when it is reacted with oxygen. However, hydrogen is highly reactive and flammable, so it requires careful handling and storage. Typical hydrogen storage materials are limited by factors like water sensitivity, risk of explosion, difficulty of control of hydrogen-generation.

Hydrogen gas can be produced efficiently from organosilanes, some of which are suitably air-stable, non-toxic, and cheap. Catalysts that can efficiently produce hydrogen from organosilanes are therefore desired with the ultimate goal of realizing safe, inexpensive hydrogen production in high yield.

Ideally, the catalyst should also operate at room temperature under aerobic conditions without the need for additional energy input.

A research team led by Kiyotomi Kaneda and Takato Mitsudome at Osaka University have now developed a catalyst that realizes efficient environmentally friendly hydrogen production from organosilanes. The catalyst is composed of gold nanoparticles with a diameter of around 2 nm supported on hydroxyapatite.

The catalyst was synthesized from chloroauric acid using glutathione as a capping agent to prevent nanoparticle aggregation, resulting the formation of small size of gold nanoparticles. Glutathione-capped gold nanoparticles were then adsorbed on hydroxyapatite and glutathione was removed by subsequent calcination.

The team then added the nanoparticle catalyst to solutions of different organosilanes to measure its ability to induce hydrogen production. The nanoparticle catalyst displayed the highest turnover frequency and number attained to date for hydrogen production catalysts from organosilanes.

For example, the nanoparticle catalyst converted 99% of dimethylphenylsilane to the corresponding silanol in just 9 min at room temperature, releasing an equimolar amount of hydrogen gas at the same time.

Importantly, the catalyst was recyclable without loss of activity. On/off switching of hydrogen production was achieved using the nanoparticle catalyst because it could be easily separated from its organosilane substrate by filtration. The activity of the catalyst increased as the nanoparticle size decreased.

A prototype portable hydrogen fuel cell containing the nanoparticle catalyst and an organosilane substrate was fabricated. The fuel cell generated power in air at room temperature and could be switched on and off as desired.

Images of the catalyst after use in the fuel cell resembled those of the unused catalyst, indicating that the hydroxyapatite-supported nanoparticle catalyst readily resisted aggregation.

Generation of hydrogen from inexpensive organosilane substrates under ambient conditions without additional energy input represents an exciting advance towards the goal of using hydrogen as a green energy source.

The article "On-demand Hydrogen Production from Organosilanes at Ambient Temperature Using Heterogeneous Gold Catalysts" was published in Scientific Reports (DOI: 10.1038/srep37682).


Comment on this article using your Disqus, Facebook, Google or Twitter login.


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only

.


Related Links
Osaka University
Powering The World in the 21st Century at Energy-Daily.com






Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle

Previous Report
ENERGY TECH
Lower cost of LEDs reduce profitability for manufacturing landscape
Washington DC (SPX) Dec 20, 2016
Although residential and commercial industries are widely adopting energy-efficient light emitting diodes (LEDs), the drop in LED prices is driving away manufacturers because of decreased profitability, dramatically dislocating and restructuring the solid-state lighting marketplace, says a new National Academies of Sciences, Engineering, and Medicine report. Since the last Academies report ... read more


ENERGY TECH
Trump sits down with tech execs, including critics

Trump sits down with tech execs, including critics

Space Network upgrade to double data rates on ISS

NASA Tech - it's all around us

ENERGY TECH
Ultra-Cold Storage - Liquid Hydrogen may be Fuel of the Future

Technical glitch postpones NASA satellite launch

After glitch, NASA satellite launch set for Wednesday

China develops non-toxic propellant for orbiting satellites

ENERGY TECH
All eyes on Trump over Mars

Opportunity performs several drives to ancient gully

Full go-ahead for building ExoMars 2020

Skimming an alien atmosphere

ENERGY TECH
Chinese missile giant seeks 20% of a satellite market

China-made satellites in high demand

Space exploration plans unveiled

China launches 4th data relay satellite

ENERGY TECH
UAE launches national space policy

Air New Zealand signs contract for Inmarsat's GX Aviation

European ministers ready ESA for a United Space in Europe in the era of Space 4.0

Nordic entrepreneurial spirit boosted by space

ENERGY TECH
Mind-controlled toys: The next generation of Christmas presents?

Ultra-high-speed optical fiber sensor enables detection of structural damage in real time

Discovery to inspire more radiation-resistant metals

Researchers discovered elusive half-quantum vortices in a superfluid

ENERGY TECH
New species found near ocean floor hot springs

Carbonaceous chondrites shed light on the origins of life in the universe

Atlas of the RNA universe takes shape

Winds of rubies and sapphires strike the sky of giant planet

ENERGY TECH
Juno Captures Jupiter 'Pearl'

Juno Mission Prepares for December 11 Jupiter Flyby

Research Offers Clues About the Timing of Jupiter's Formation

New Perspective on How Pluto's "Icy Heart" Came to Be




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News






The content herein, unless otherwise known to be public domain, are Copyright 1995-2017 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. All articles labeled "by Staff Writers" include reports supplied to Space Media Network by industry news wires, PR agencies, corporate press officers and the like. Such articles are individually curated and edited by Space Media Network staff on the basis of the report's information value to our industry and professional readership. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement