Osaka University researchers develop efficient “green” hydrogen production system that operates at room temperature in air.
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.
Receive an email update when we add a new HYDROGEN PRODUCTION article.
The Latest on: Hydrogen production
via Google News
The Latest on: Hydrogen production
- Tag Archives: hydrogen on April 17, 2019 at 4:58 pm
Rebranding Oklahoma: Commerce officials discuss new approach to economic development Newpoint to build facility for hydrogen production Back up to par: City golf courses now allowed to sell beer ... […]
- Newpoint to build facility for hydrogen production on April 17, 2019 at 4:47 pm
Newpoint Gas LLC announced today plans to open a facility to use a newly patented process of producing water, electricity and a hydrogen energy source from zero-emissions natural gas technologies. […]
- Want A Nikola Hydrogen-Electric Truck? You Will Have To Wait on April 17, 2019 at 11:14 am
Milton insists that the finances of the truck will result in it being less expensive to operate than a current diesel model, and because Nikola's hydrogen production and plant power will utilize ... […]
- Nikola showcases hydrogen-electric Class 8, full product suite at Arizona event on April 16, 2019 at 10:01 pm
“All of our own hydrogen production, Nikola builds … to make sure they can support the trucks that we sell,” he says. Next up was the Nikola Tre European cabover tractor, followed by its North ... […]
- Oil Giant BP Joins Nouryon in Rotterdam Hydrogen Quest on April 15, 2019 at 9:58 am
He is based in Barcelona, Spain. British oil giant BP is looking to create Europe’s largest renewable energy-based hydrogen production facility at a refinery in Rotterdam, the Netherlands. The company ... […]
- CSIRO Brings Hydrogen Fuel One Step Closer to You on April 15, 2019 at 8:21 am
there is a major opportunity for a renewable hydrogen production industry, especially for countries that have vast solar potential like the United States and Australia. This means that renewable ... […]
- Washington Utility Eager To Branch Into Hydrogen Fuel Production on April 15, 2019 at 6:30 am
An electric utility in north-central Washington wants to branch out into hydrogen fuel production. It would be the first of a group of power companies in the Pacific Northwest to use their dams to ... […]
- Global truck manufacturers turn to hydrogen fuel in clean energy push on April 13, 2019 at 10:38 pm
According to the US Department of Energy, the interest in hydrogen as an alternative transportation fuel stems from its ability to power fuel cells in zero-emission fuel cell electric vehicles (FCEVs) ... […]
- Hydrogenics to Deliver First Green Hydrogen Production Station to New Zealand on April 11, 2019 at 9:49 am
The 1.5 megawatt hydrogen production project is scheduled to be in operation by 2020 and will be a valuable asset supporting joint research and development initiatives by Tuaropaki Trust and ... […]
via Bing News