Navigation Links
Just add water: How scientists are using silicon to produce hydrogen on demand
Date:1/22/2013

BUFFALO, N.Y. Super-small particles of silicon react with water to produce hydrogen almost instantaneously, according to University at Buffalo researchers.

In a series of experiments, the scientists created spherical silicon particles about 10 nanometers in diameter. When combined with water, these particles reacted to form silicic acid (a nontoxic byproduct) and hydrogen a potential source of energy for fuel cells.

The reaction didn't require any light, heat or electricity, and also created hydrogen about 150 times faster than similar reactions using silicon particles 100 nanometers wide, and 1,000 times faster than bulk silicon, according to the study.

The findings appeared online in Nano Letters on Jan. 14. The scientists were able to verify that the hydrogen they made was relatively pure by testing it successfully in a small fuel cell that powered a fan.

"When it comes to splitting water to produce hydrogen, nanosized silicon may be better than more obvious choices that people have studied for a while, such as aluminum," said researcher Mark T. Swihart, UB professor of chemical and biological engineering and director of the university's Strategic Strength in Integrated Nanostructured Systems.

"With further development, this technology could form the basis of a 'just add water' approach to generating hydrogen on demand," said researcher Paras Prasad, executive director of UB's Institute for Lasers, Photonics and Biophotonics (ILPB) and a SUNY Distinguished Professor in UB's Departments of Chemistry, Physics, Electrical Engineering and Medicine. "The most practical application would be for portable energy sources."

Swihart and Prasad led the study, which was completed by UB scientists, some of whom have affiliations with Nanjing University in China or Korea University in South Korea. Folarin Erogbogbo, a research assistant professor in UB's ILPB and a UB PhD graduate, was first author.

The speed at which the 10-nanometer particles reacted with water surprised the researchers. In under a minute, these particles yielded more hydrogen than the 100-nanometer particles yielded in about 45 minutes. The maximum reaction rate for the 10-nanometer particles was about 150 times as fast.

Swihart said the discrepancy is due to geometry. As they react, the larger particles form nonspherical structures whose surfaces react with water less readily and less uniformly than the surfaces of the smaller, spherical particles, he said.

Though it takes significant energy and resources to produce the super-small silicon balls, the particles could help power portable devices in situations where water is available and portability is more important than low cost. Military operations and camping trips are two examples of such scenarios.

"It was previously unknown that we could generate hydrogen this rapidly from silicon, one of Earth's most abundant elements," Erogbogbo said. "Safe storage of hydrogen has been a difficult problem even though hydrogen is an excellent candidate for alternative energy, and one of the practical applications of our work would be supplying hydrogen for fuel cell power. It could be military vehicles or other portable applications that are near water."

"Perhaps instead of taking a gasoline or diesel generator and fuel tanks or large battery packs with me to the campsite (civilian or military) where water is available, I take a hydrogen fuel cell (much smaller and lighter than the generator) and some plastic cartridges of silicon nanopowder mixed with an activator," Swihart said, envisioning future applications. "Then I can power my satellite radio and telephone, GPS, laptop, lighting, etc. If I time things right, I might even be able to use excess heat generated from the reaction to warm up some water and make tea."


'/>"/>

Contact: Charlotte Hsu
chsu22@buffalo.edu
716-645-4655
University at Buffalo
Source:Eurekalert  

Related biology news :

1. Oil and water: An icy interaction when oil chains are short, but steamy when chains are long
2. Survival without water: A key trait of an aquatic invader to spread
3. Scientists find gene interactions that make cocaine abuse death 8 times more likely
4. ARS scientists test improved stink bug trapping methods
5. First in the world - Singapore scientists discover genes responsible for cornea blindness
6. Scientists seek out cancer cells hiding from treatment
7. Scientists discover structure of protein essential for quality control, nerve function
8. MBL scientists find bipolar marine bacteria, refuting everything is everywhere idea
9. 2 climate scientists win 2012 Vetlesen Prize for work on ozone hole, ice cores
10. Scientists reassemble the backbone of life with a particle accelerator
11. Scientists reassemble the backbone of life with a particle acceleratorynchrotron X-rays
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Just add water: How scientists are using silicon to produce hydrogen on demand
(Date:2/7/2017)... Ind. , Feb. 7, 2017 Zimmer ... leader in musculoskeletal healthcare, will present at the LEERINK ... New York Palace Hotel on Wednesday, February 15, 2017 ... live webcast of the presentation can be accessed at ... replay following the conference via Zimmer Biomet,s Investor Relations ...
(Date:2/6/2017)... According to Acuity Market Intelligence, ongoing ... to continue to embrace biometric and digital identification ... Border Control (ABC) eGates and 1436 Automated Passport ... 163 ports of entry across the globe. Deployments ... combined CAGR of 37%. APC Kiosks reached 75% ...
(Date:2/3/2017)... A new independent identity strategy consultancy firm ... . Designed to fill a critical niche in technical ... partners Mark Crego and Janice Kephart ... identity expertise that span federal governments, the 9/11 Commission, ... combined expertise has a common theme born from a ...
Breaking Biology News(10 mins):
(Date:2/22/2017)... , Feb. 22, 2017  PrimeVax Immuno-Oncology, Inc. announced ... presenting at the Annual Biocom Global Life Science Partnering ... at 11:15 AM, at the Torrey Pines Lodge, in ... the organizers at Biocom who have chosen our company, ... of biotechnology companies, investors, and clinical researchers," said Mr. ...
(Date:2/22/2017)... ... February 22, 2017 , ... ... provider of women’s health, primary care, and specialty education, announced today it ... Education (ACCME). ACCME’s Accreditation with Commendation is a six-year accreditation and is ...
(Date:2/22/2017)... ... February 22, 2017 , ... ... and scientists from around the world, is pleased to announce the 2nd annual ... 23, 2017. This premier, online-only conference focused on the development and advancements in ...
(Date:2/22/2017)... 22, 2017 Dublin ... "Global Biological Crop Protection (Bio-Pesticide) Market-By Type, By Application, By End ... to their offering. ... Global Biological Crop Protection Market is forecasted to grow at ... growth in biopesticide or biological crop protection market is driven by ...
Breaking Biology Technology: