Subscribe to our free daily newsletters
  Energy News  




Subscribe to our free daily newsletters



ENERGY TECH
Electrocatalyst nanostructures key to improved fuel cells, electrolyzers
by Staff Writers
West Lafayette IN (SPX) Jun 07, 2017


File image

Purdue University scientists' simulations have unraveled the mystery of a new electrocatalyst that may solve a significant problem associated with fuel cells and electrolyzers.

Fuel cells, which use chemical reactions to produce energy, and electrolyzers, which convert energy into hydrogen or other gases, use electrocatalysts to promote chemical reactions. Electrocatalysts that can activate such reactions tend to be unstable because they can corrode in the highly acidic or basic water solutions that are used in fuel cells or electrolyzers.

A team led by Jeffrey Greeley, an associate professor of chemical engineering, has identified the structure for an electrocatalyst made of nickel nanoislands deposited on platinum that is both active and stable. This design created properties in the nickel that Greeley said were unexpected but highly beneficial.

"The reactions led to very stable structures that we would not predict by just looking at the properties of nickel," Greeley said. "It turned out to be quite a surprise."

Greeley's team and collaborators working at Argonne National Laboratory had noticed that nickel placed on a platinum substrate showed potential as an electrocatalyst. Greeley's lab then went to work to figure out how an electrocatalyst with this composition could be both active and stable.

Greeley's team simulated different thicknesses and diameters of nickel on platinum as well as voltages and pH levels in the cells. Placing nickel only one or two atomic layers in thickness and one to two nanometers in diameter created the conditions they wanted.

"They're like little islands of nickel sitting on a sea of platinum," Greeley said.

The ultra-thin layer of nickel is key, Greeley said, because it's at the point where the two metals come together that all the electrochemical activity occurs. And since there are only one or two atomic layers of nickel, almost all of it is reacting with the platinum. That not only creates the catalysis needed, but changes the nickel in a way that keeps it from oxidizing, providing the stability.

Collaborators at Argonne then analyzed the nickel-platinum structure and confirmed the properties Greeley and his team expected the electrocatalyst to have.

Next, Greeley plans to test similar structures with different metals, such as replacing platinum with gold or the nickel with cobalt, as well as modifying pH and voltages. He believes other more stable and active combinations may be found using his computational analysis.

ENERGY TECH
'Instantly rechargeable' battery could change the future of electric and hybrid automobiles
West Lafayette IN (SPX) Jun 06, 2017
A technology developed by Purdue researchers could provide an "instantly rechargeable" method that is safe, affordable and environmentally friendly for recharging electric and hybrid vehicle batteries through a quick and easy process similar to refueling a car at a gas station. The innovation could expedite the adoption of electric and hybrid vehicles by eliminating the time needed to stop ... read more

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


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

Comment using your Disqus, Facebook, Google or Twitter login.

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

ENERGY TECH
India vows to 'go beyond' Paris accord, adding pressure on Trump

US states, cities and firms unite behind Paris accord

US may do less harm outside climate pact than in it: analysts

China further opens energy sector to private investment

ENERGY TECH
Electrocatalyst nanostructures key to improved fuel cells, electrolyzers

'Instantly rechargeable' battery could change the future of electric and hybrid automobiles

Printed, flexible and rechargeable battery can power wearable sensors

Nanoalloys 10 times as effective as pure platinum in fuel cells

ENERGY TECH
ADB: Asia-Pacific growth tied to renewables

GE Energy Financial Services Surpasses $15 Billion in Renewable Energy Investments

U.S. states taking up wind energy mantle

Scientists track porpoises to assess impact of offshore wind farms

ENERGY TECH
Replacing coal with solar can save lives and money

New low-cost material for lighting and diagnostics produces white light imitating sunlight

Artificial transpiration for solar water purification

Paris withdrawal sets business world at odds with Trump

ENERGY TECH
A new twist on the origin of uranium

Nuclear-wary Japan restarts another atomic reactor

Three Mile Island nuclear plant to close in 2019

Why nuclear could become the next 'fossil' fuel

ENERGY TECH
Newly identified gene helps time spring flowering in vital grass crops

Splitting carbon dioxide using low-cost catalyst materials

Cold conversion of food waste into renewable energy and fertilizer

Nagoya University researchers break down plastic waste

ENERGY TECH
Oil production in the Gulf of Mexico shows resilience

Gas-rich Russia next to ponder impact of Qatari dust-up

Some bearish trends setting in for crude oil

Supply and demand factors leave U.S. gas prices stable

ENERGY TECH
World leaders vow to defend climate pact after Trump pullout

Climate science: Bad news gets worse

Cape Town cuts back to survive worst drought in 100 years

Climate: What is the Paris Agreement?




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