Connect with us

Tech

Plasma-based method creates efficient, low-cost catalysts for metal–air batteries

Published

on

Plasma-based method creates efficient, low-cost catalysts for metal–air batteries


In this study, researchers developed a straightforward plasma-based process to produce a composite of carbon and cobalt-tin hydroxide. Under the right synthesis conditions, the resulting material exhibits exceptional properties for metal–air batteries, paving the way to more sustainable and efficient energy storage for transportation. Credit: Professor Takahiro Ishizaki / Shibaura Institute of Technology, Japan pubs.rsc.org/en/content/articlelanding/2025/se/d5se00370a

Due to the intense global impact of fossil fuel overuse on air quality and climate, the search for advanced clean energy solutions has become critical. Metal–air batteries offer a game-changing alternative, holding the potential to replace combustion engines in various applications.

By electrochemically converting oxygen from the air into power, these batteries achieve theoretical energy densities up to twelve times higher than lithium-ion cells, delivering unprecedented efficiency with zero operational emissions.

Challenges facing metal–air battery adoption

Despite their theoretical advantages, metal–air batteries have yet to achieve widespread commercial viability due to several critical obstacles. Current high-performance catalysts primarily depend on expensive precious metals, such as platinum and ruthenium, rendering them economically unfeasible for mass production and large-scale deployment.

Furthermore, most existing are monofunctional, efficiently driving only one of the two essential electrochemical processes—the (ORR) or the (OER)—but not both.

Compounding these issues, the complex, multi-step synthesis processes required for these catalysts inflate manufacturing costs and severely restrict scalability.

Innovative research tackles catalyst limitations

Against this backdrop, a research team led by Professor Takahiro Ishizaki from the College of Engineering at Shibaura Institute of Technology, Japan, and Assistant Professor Sangwoo Chae from Nagoya University, Japan, has been working hard to find appropriate solutions to these issues.

In their latest study, published in Sustainable Energy & Fuels, they report a revolutionary single-step method for creating highly effective bifunctional catalysts using abundant, low-cost materials.

The researchers utilized the recently pioneered solution plasma process (SPP) for the synthesis, successfully creating cobalt-tin hydroxide (CoSn(OH)6) composites anchored to various carbon supports. This is a critical distinction from conventional catalyst synthesis: unlike traditional, multi-step methods that require surfactants and extensive post-processing, SPP enables rapid, single-step synthesis at room temperature under ambient atmospheric conditions.

This plasma-based approach not only confers unique surface properties that significantly boost but also dramatically slashes manufacturing complexity and production costs.

The research team systematically produced catalysts with varied compositions and carbon structures, rigorously testing their bifunctional performance in both the oxygen reduction (ORR) and oxygen evolution (OER) reactions—the two pivotal processes determining overall battery efficiency.

Their best-performing catalyst, combining CoSn(OH)6 with Ketjen Black carbon, achieved remarkable results. For oxygen evolution, it outperformed the industry-standard ruthenium oxide catalyst, requiring lower voltages to achieve the same current densities. In oxygen reduction, it exhibited performance comparable to much more expensive platinum-based catalysts while relying solely on abundant materials.

Moreover, this new catalyst proved to be quite durable, as Prof. Ishizaki says, “Our advanced CoSn(OH)6–Ketjen Black composite exhibited exceptional long-term stability, maintaining its superior oxygen evolution performance for over 12 hours without degradation, a crucial factor for real-world battery applications.”

Notably, the catalyst’s ability to efficiently catalyze both required reactions represents a significant advancement in the field. The researchers measured a potential gap of just 0.835 V between the two reactions, thus enabling highly efficient energy conversion. This dual functionality eliminates the need for separate catalysts, further reducing system complexity and costs.

Detailed analysis confirms that the superior catalytic performance stems from powerful synergistic interactions between the (CoSn(OH)6) nanoparticles and the carbon support.

The researchers discovered that the SPP synthesis process is key: it ensures a uniform distribution of active nanoparticles across the carbon surface, which maximizes the exposure of catalytic sites while simultaneously guaranteeing excellent electrical conductivity.

Furthermore, the method offers precise control over particle size and crucial surface properties, allowing for systematic optimization of catalytic activity.

“This breakthrough holds profound potential to customize and manufacture high-performance, durable, and low-cost bifunctional electrocatalysts for critical energy conversion systems,” highlights Prof. Ishizaki. “It offers a truly sustainable material alternative to commercially used precious metal-based catalysts.”

Implications for energy storage and industry

The implications of this work are far-reaching, promising a revolution across the energy sector. Metal–air batteries powered by these newly developed catalysts could fundamentally transform for electric vehicles, offering a significantly longer range and faster charging capabilities while simultaneously reducing overall costs.

Furthermore, the technology holds immense potential for grid-scale energy storage, which is crucial for the efficient integration of intermittent renewable sources like solar and wind power into electrical networks. The proposed single-step synthesis method offers equally profound industrial advantages.

By eliminating complex, multi-step processing and reliance on expensive raw materials, manufacturers can produce these high-performing catalysts at a fraction of the current cost. Moreover, the ability to synthesize these materials under ambient conditions drastically reduces energy consumption and compared to conventional high-temperature, high-pressure methods currently used in battery and catalyst production.

Overall, this research represents a crucial and transformative step toward achieving economically viable clean energy storage on a global scale, poised to significantly accelerate the essential transition away from fossil fuels in the transportation and energy sectors.

More information:
Sangwoo Chae et al, Single-step solution plasma synthesis of bifunctional CoSn(OH)6–carbon composite electrocatalysts for oxygen evolution and oxygen reduction reactions, Sustainable Energy & Fuels (2025). DOI: 10.1039/d5se00370a

Citation:
Plasma-based method creates efficient, low-cost catalysts for metal–air batteries (2025, November 17)
retrieved 17 November 2025
from https://techxplore.com/news/2025-11-plasma-based-method-efficient-catalysts.html

This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
part may be reproduced without the written permission. The content is provided for information purposes only.





Source link

Tech

A Single Strike Won’t Shut Off the Gulf’s Desalination System

Published

on

A Single Strike Won’t Shut Off the Gulf’s Desalination System


Across the region, facilities tied to water and power—including desalination plants—have been damaged or exposed to risk as Iranian strikes extend beyond traditional targets.

A single strike, however, is unlikely to shut off the gulf’s water supply. The system is designed to absorb isolated disruption, but sustained or multisite attacks would begin to strain supply far more quickly.

“In the Gulf, desalination is built with enough breathing room that losing one plant doesn’t immediately show up at the tap,” says Rabee Rustum, professor of water and environmental engineering at Heriot-Watt University Dubai.

In Kuwait, Iranian drone attacks have damaged two power and desalination facilities and ignited fires at two oil sites. Other sites, including Fujairah in the UAE, have been identified as potentially exposed.

“Striking desalination plants would be a strategic move, but it would also come very close to, and in some cases cross, a red line,” says Andreas Krieg, senior lecturer at the School of Security Studies at King’s College London.

Water infrastructure, Krieg explains, occupies a distinct category. “Water infrastructure is not just another utility. In places that depend on desalination, it underpins civilian survival, public health, hospital function, sanitation, and basic state legitimacy.”

Krieg notes that international humanitarian law gives special protection to civilian objects and to objects indispensable to the survival of the civilian population. “Which is precisely why attacks on water systems carry such grave legal and moral weight,” Krieg adds.

The incidents highlight a structural reality: Desalination is central to water supply in the gulf, and disruption carries immediate implications for daily life.

How the System Absorbs Disruption

At first glance, desalination appears vulnerable. Shut down a plant, and supply is reduced. In practice, the system is designed with layers of redundancy.

Plants operate across multiple locations, allowing output to be redistributed if one facility slows down. Water is also stored at different points across the network, including central reservoirs and building-level tanks, creating a buffer that delays disruption.

According to a statement to WIRED Middle East by Veolia, an environmental services provider whose technologies account for nearly 19 percent of desalination capacity in the region, “the region’s water supply is diversified thanks to a network of numerous facilities distributed along the coastline.”

The company adds that distribution systems are interconnected, allowing plants to “support and substitute for one another when necessary,” helping maintain continuity of service.

In the UAE, storage capacity typically covers around one week, while in other parts of the region it may be limited to two to three days, Veolia says.

In practice, this means the system can absorb disruption for a limited period. Once reserves are depleted, water supply depends on whether plants can continue producing enough water to meet demand.

The System That Produces Water

Unlike most regions, the Gulf does not rely on rivers or rainfall. It depends on a network of desalination plants along its coastline that convert seawater into potable water on a continuous basis.

Seawater is drawn into treatment facilities, filtered and processed either through reverse osmosis—forcing it through membranes to remove salt and impurities—or through thermal methods that evaporate and condense water. The resulting supply is distributed through pipelines, stored in reservoirs, and delivered to homes, hospitals, and industry.

This is not a flexible system. It is designed to operate continuously, producing water at a scale that sustains cities, industrial activity, and essential services. Gulf states produce roughly 40 percent of the world’s desalinated water, operating more than 400 plants across the region.

Dependence varies by country but is high everywhere. In the UAE, desalination accounts for 41 to 42 percent of total water supply, while in Kuwait, it provides around 90 percent of drinking water, and in Saudi Arabia, approximately 70 percent.

When Disruption Becomes Visible

For residents, disruption would not be felt immediately—water would continue to flow.

Rustum explains that buildings are supported by internal storage and pumping systems, meaning early changes in supply may not be apparent. In many cases, water pressure remains stable, even as the wider system adjusts.



Source link

Continue Reading

Tech

Border Patrol Agents Sold Challenge Coins With ‘Charlotte’s Web’ Characters in Riot Gear

Published

on

Border Patrol Agents Sold Challenge Coins With ‘Charlotte’s Web’ Characters in Riot Gear


US Border Patrol agents are raising money by selling coins that commemorate last year’s wave of immigration enforcement “operations” across the country, along with other merchandise. The funds are for nonprofit organizations that list Border Patrol buildings as their address in IRS paperwork. At least two of the organizations have dedicated US Customs and Border Protection email addresses.

The front side of one coin for sale reads, “NORTH AMERICAN TOUR 2025,” along with the acronyms for US Border Patrol and the acronym for “fuck around and find out”—a phrase that was initially popularized by the far-right group the Proud Boys and has been used by various Trump officials. In the center, the coin depicts a gas mask, a riot control smoke grenade, and a pepper ball launcher. On the other side, the coin appears to have a portrait of Border Patrol’s now retired commander-at-large, Gregory Bovino, with his arm raised in a salute, along with the text “COMING TO A CITY NEAR YOU!” It lists seven cities, many of which actually saw federal enforcement surges in 2025: Chicago, Los Angeles, Memphis, Phoenix, Portland, Charlotte, and Atlanta.

The coin is for sale by Willcox Morale Welfare and Recreation, a nonprofit that the IRS most recently declared tax-exempt during the Biden administration and whose address on IRS paperwork matches that of the Willcox Border Patrol Station in Arizona. A request for comment sent to Willcox MWR’s dedicated CBP email address went unanswered.

Employees of the Department of Homeland Security, the parent agency for Border Patrol, are allowed to start private, not-for-profit employee associations within DHS, so long as they get formally recognized by the agency and follow certain rules. According to DHS policies, officially recognized groups can fundraise using government property and create merchandise with the agency’s name and logos–but they have to receive advance approval from the agency.

Willcox MWR is just one of several groups across the country that cater to Border Patrol agents and refer to themselves as MWRs, a reference to the US military’s “morale, welfare and recreation” programs. The groups tend to throw holiday events and retirement parties, and sometimes raise money for the families of agents going through hard times, including those not getting paid during the current shutdown.

Many MWRs also sell customized medallions known as “challenge coins” that commemorate specific teams or events. While anyone, including CBP alumni, can design and sell coins, current DHS employees are not supposed to use government resources to sell ones that use the agency’s seals or logos without permission, or ones that the agency considers inappropriate or unprofessional.

CBP did not provide comment about its relationship to Willcox MWR or any other nonprofit mentioned in this story, nor whether the agency had green-lit the “North American Tour” coin design, ahead of publication.

Under Willcox MWR’s Facebook post about the “North American Tour” coin, someone named Juan Diego commented, “Sign up SDC BK5 MWR for 10.”

“Shoot us an email,” someone managing the Willcox MWR account replied, giving out what appeared to be a dedicated cbp.dhs.gov email address for the group.

SDC BK5 MWR, also a registered nonprofit, lists an address on its website that matches that of a government facility in Chula Vista, California. It says on its site that it was started by San Diego Sector Border Patrol agents and sells custom merchandise “designed to raise funds for morale and relief efforts.”

Diego did not respond to a request for comment.

The SDC BK5 MWR website has listings for over 200 different products in addition to the North American Tour coin. One of those listings was a “Chicago Midway Blitz” challenge coin in the shape of a gas mask that doubles as a bottle opener. Embossed around the edges of the coin are the names of several municipalities and neighborhoods caught up in DHS’s immigration enforcement surge of the same name last fall. Like the North American Tour coin, it features the US Border Patrol logo and the acronym for “fuck around and find out.” Opponents of the Trump administration’s immigration enforcement activity in Illinois are unamused.



Source link

Continue Reading

Tech

One of Our Favorite 360 Cams Is 35 Percent Off

Published

on

One of Our Favorite 360 Cams Is 35 Percent Off


Tired of taking your action camera on an adventure, only to get home and find out you missed the action with a bad angle? One option is to switch to a 360-degree action cam, so you can capture all of the action and then edit down to just the good stuff later. One of our favorite options, the DJI Osmo 360, is currently available for just $390 on Amazon, a $209 discount from its usual price, and it comes with a selfie stick and an extra battery.

The DJI Osmo 360 achieves its impressive all-around video quality by leveraging a pair of 1/1.1-inch sensors, larger than some other offerings, and by supporting 10-bit color. You can really see that in the camera’s output, with colors that are vivid and bold, to the point that you may need to dial them back a bit in post if you want something more natural. With support for up to 50 frames per second at 8K when recording in 360 degrees, or 120 fps at 4K when shooting with only one sensor, you’ll have plenty of material to work with. In our testing, it ran for just shy of two hours at 30 fps, which is also around the time the internal storage had filled up anyway.

If you plan on catching any serious discussions with your Osmo 360, you’ll be pleased to know it connects directly to DJI’s line of wireless lavalier microphones, including the excellent and frequently discounted DJI Mic 2 and Mic Mini. If you want to mount it to something other than the included 1.2-meter selfie stick, it has both DJI’s magnetic attachment system and a more traditional ¼”-20 tripod mount. The DJI Mimo app lets you control the camera and adjust any settings, and there’s even a simple editor for on-the-fly production. For desktop users, DJI Studio has even more in-depth settings and editing options, in case you don’t want to pay for Premiere.

The DJI Osmo 360 is one of our favorite action cameras, and is particularly appealing at the discounted price point, but make sure to check out our full review for more info, or head over to our full roundup to see what else is available.



Source link

Continue Reading

Trending