Silver electrocatalyst could help breath easily in space

Silver electrocatalyst could help breath easily in space

6:36 AM, 21st February 2015
Silver electrocatalyst could help breath easily in space
University of Delware’s Feng Jiao is part of a team working on a project to develop a system to provide oxygen for long-duration space flights.

DELAWARE, US: Despite continuous advances, major obstacles remain before manned missions can set off for destinations like Mars. A primary concern is how people will breathe. Long-duration space flights would travel far away from Earth and take years. Oxygen tanks can’t be shuttled out to resupply the astronauts, so the air must be recycled. Yet state-of-the-art systems are only about 50 per cent efficient at recovering used oxygen from carbon dioxide.

NASA is funding several projects attempting to solve this problem, one of which involves a University of Delaware engineer and came about through a serendipitous connection. A scientist at NASA’s Glenn Research Center contacted Feng Jiao, Assistant Professor in UD’s Department of Chemical and Biomolecular Engineering, after he and his colleagues published a paper in Nature Communications in January 2014.

Jiao’s team had created a silver electrocatalyst that, due to its carefully designed nanoscale structure, could convert carbon dioxide to carbon monoxide with 92 per cent efficiency - freeing oxygen in the process. The catalyst itself is a silver coating on the surface of an electrode that increases the efficiency of the CO2-CO reaction by assisting with the transfer of electrons. “The catalyst performance is definitely among the best. It’s very selective, very efficient,” said Jiao.

Carbon monoxide (CO) has many industrial applications, and the initial idea was to convert abundant CO2 to useful CO, with the oxygen as an incidental byproduct. Now that byproduct is what they’re focused on. Jiao and the NASA scientist, Ken Burke, are co-principal investigators on a $750,000 NASA-funded grant, one of four teams trying to create the most efficient oxygen recycling system possible.

Burke’s lab was working on a technology to convert two molecules of carbon monoxide to one molecule of carbon dioxide and one molecule of carbon. If they can combine their systems, said Jiao, “then eventually we can completely split CO2 to one molecule of carbon and one molecule of oxygen.”

With such a system, “in principle, we can recover 100 per cent of the oxygen from CO2. NASA is very interested in developing this kind of technology for deep space exploration,” said Jiao.

The first challenge is to convert the University laboratory’s electrocatalysis device. The system currently processes its ingredients in batches, but for this purpose it must run continuously. They then have to integrate their part of the work with what Burke’s lab in Ohio has created.

If their system is one of the two chosen by NASA for further exploration, they will be granted $2 million to adapt the system for large-scale use.

“Right now, these kinds of lab-scale systems are not even sufficient to support one crew member in space travel. In Phase II we want to develop a system which can support four people on board,” said Jiao.

They will also ensure that the system is compatible with a zero-gravity environment and stable enough for operation over a period of months. Eventually, the winning system will go up for in-flight testing.

This is the first time Jiao has worked with NASA, an exciting prospect for him. “My students also got very excited. They’re actually very eager to start this project and see how far we can push this technology,” said Jiao.

© University of Delaware News

0 Comments

Login

Your Comments (Up to 2000 characters)
Please respect our community and the integrity of its participants. WOC reserves the right to moderate and approve your comment.

Related News


CB&I bags polypropylene facility contract in Ain Sokhna, Egypt

THE WOODLANDS, US: CB&I has been awarded a contract by Carbon Holdings for the license and engineering design of a polypropylene unit to be built ...

Read more
New technique for making molybdenum disulphide

PENNSYLVANIA, US: Graphene, a single-atom-thick lattice of carbon atoms, is often touted as a replacement for silicon in electronic devices due to its ...

Read more
Albemarle’s Chemetall acquires all shares of Shanghai joint venture

SHANGHAI, CHINA: Chemetall, a business unit of the US-based Albemarle Corporation, has completed the acquisition of all shares of its Shanghai Chemeta ...

Read more
BASF, Yara to build ammonia plant in Freeport, US

LUDWIGSHAFEN, GERMANY/OSLO, NORWAY: Yara International and BASF Group have agreed to build a world scale ammonia plant at BASF’s site in Freepor ...

Read more
PhosAgro commissions new phosphate-potash fertilizer plant in Russia

MOSCOW, RUSSIA: PhosAgro, one of the world’s leading vertically integrated phosphate-based fertilizer producers, has commissioned a new phosphat ...

Read more
Limpet teeth might be strongest natural material, say scientists

PORTSMOUTH, UK: Limpet teeth might be the strongest natural material known to man, a new study has found. Researchers from the University of Portsmout ...

Read more