Indirect surpassing CO2 utilization in membrane-free CO2 battery
2021-03-17
(Press-News.org) A recent study, affiliated with UNIST has unveiled a novel system, capable of producing hydrogen and electricity quickly and effectively while eliminating carbon dioxide (CO?) emissions significantly.
Published in the January 2021 issue of Nano Energy, this breakthrough has been carried out by Professor GunTae Kim and his research team in the School of Energy and Chemical Engineering at UNIST. In this study, the research team succeeded in developing a membrane-free aqueous metal-CO? battery. Unlike the existing aqueous metal-CO? systems, the new battery is not only easier to manufacture, but also allows continuous operation with one type of electrolyte.
The research team designed a membrane-free (MF) Mg-CO2 battery, as an advanced approach to sequester CO2 emissions by generating electricity and value-added chemicals without any harmful by-products. According to the research team, their MF Mg-CO2 battery operates based on the indirect utilization of CO2 with facile hydrogen generation process. It has been also found that the new battery exhibits high faradaic efficiency of 92.0%.
"In order to translate the newly-developed laboratory-scale MF Mg-CO2 battery technology into a commercial reality, we have envisioned an operational prototype system that produces electricity and value-added chemicals, as a cornerstone to better support sustainable human life from CO2 and earth-abundant renewable power (e.g., wind, solar, seawater)," noted the research team.
The MF Mg-CO2 battery system has a structure similar to that of hydrogen fuel cells for use in cars, since it only requires a Mg-metal negative electrode, an aqueous electrolyte, and a positive-electrode catalyst. However, unlike the existing fuel cells, they are based on aqueous electrolytes. As a result, the newly-developed MF Mg-CO2 battery had successfully sequestered CO2 emissions by generating electricity and value-added chemicals without any harmful by-products.
"Our findings indicate great benefits for the newly-developed MF Mg-CO2 battery technology to produce various value-added chemicals of practical significance and electricity from CO2 without any wasted by-products," noted the research team. "Through this we have opened the door to electrochemical utilization of CO2 with indirect circulation for future alternative technologies."
INFORMATION:
Journal Reference
Jeongwon Kim, Arim Seong, Yejin Yang, et al., "Indirect surpassing CO2 utilization in membrane-free CO2 battery," Nano Energy, (2021).
[Attachments] See images for this press release:
ELSE PRESS RELEASES FROM THIS DATE:
2021-03-17
Philadelphia, March 17, 2021 - As high school athletes return to practice and games for a variety of sports, the threat of concussions remains. A new study from researchers at Children's Hospital of Philadelphia (CHOP) used head impact sensors in four different sports and studied male and female athletes to determine which of these sports put students at the highest risk for head impacts that could lead to concussions. The findings were published online by the Orthopaedic Journal of Sports Medicine.
"Adolescents are particularly vulnerable to concussion because they frequently participate in sporting and recreational activities and have slower recovery periods compared to adults," said Kristy Arbogast, PhD, senior ...
2021-03-17
It's a fact - humans love sugar. For those of us who also like to watch our calories, sugar substitutes can help.
Some zero-calorie or low-calorie sweeteners have attracted bad reputations for containing unnatural ingredients. But there are also natural sweeteners derived from plants, like stevia.
Stevia is hundreds of times sweeter than sugar, and it has no calories. The global stevia market is now worth hundreds of millions of dollars.
The sweetener is derived from the leaves of the plant Stevia rebaudiana, a native of Paraguay and Brazil. The leaves make chemicals similar enough to sugar to trick the tongue. ...
2021-03-17
SPOKANE, Wash. - COVID-19 has created new problems for pregnant women in the United States, a group that already faced the highest maternal mortality rate in the developed world even before the pandemic.
One of their biggest concerns is their baby contracting the disease, according to a Washington State University study published recently in the journal BMC Pregnancy and Childbirth. Some women expressed fears that simply going to the hospital to deliver would cause them to get the virus and then be forced to isolate from their newborn.
"Pregnant women are really stressed about contracting COVID-19," ...
2021-03-17
Subsidising low carbon emission meals could encourage more people to choose them, according to new research.
The study, led by Queen Mary University of London, investigated the impact of different interventions on encouraging people to select low carbon emission menu options in a simulated lunchtime canteen environment. This included the use of carbon taxes and subsidies, traffic light labelling (TLL) and social norms, where more sustainable options were highlighted as the most popular menu items.
Carbon taxes and either behavioral intervention - TLL or social norms - had a limited effect on shifting behaviours towards meal choices with lower carbon footprints. However, when all these interventions were combined with subsidies, where the ...
2021-03-17
The critically endangered regent honeyeater is losing its "song culture" due to the bird's rapidly declining population, according to new research from The Australian National University (ANU).
Just like humans learning to speak, many birds learn to sing by associating with older birds of the same species. They risk losing this skill if adults become too rare. And if they don't learn to sing a sexy enough song, their chances of mating are reduced.
"If endangered birds are unable to learn how to sing correctly, it seriously impacts their ability to communicate," lead author Dr Ross Crates said.
"It ...
2021-03-17
Machine learning can be used to comb through online reviews of substance use treatment facilities to home in on qualities that are important to patients but remain hard to capture via formal means, such as surveys, researchers from the Perelman School of Medicine at the University of Pennsylvania show. The researchers found that professionalism and staff dedication to patients were two of the top qualities that could be attributed to either a negative or positive review of the facility. Findings from this study were published today in the Journal of General Internal Medicine.
"Searching ...
2021-03-17
GAINESVILLE, Fla. --- In a genetic surprise, ancient DNA shows the closest family members of an extinct bird known as the Haitian cave-rail are not in the Americas, but Africa and the South Pacific, uncovering an unexpected link between Caribbean bird life and the Old World.
Like many animals unique to the Caribbean, cave-rails became extinct soon after people settled the islands. The last of three known West Indian species of cave-rails - flightless, chicken-sized birds - vanished within the past 1,000 years. Florida Museum of Natural History researchers sought to resolve the group's long-debated ancestry by analyzing DNA from a fossil toe bone ...
2021-03-17
SAN FRANCISCO (March 16, 2021) - Over the course of Earth's history, several mass extinction events have destroyed ecosystems, including one that famously wiped out the dinosaurs. But none were as devastating as "The Great Dying," which took place 252 million years ago during the end of the Permian period. A new study, published today in Proceedings of the Royal Society B, shows in detail how life recovered in comparison to two smaller extinction events. The international study team--composed of researchers from the China University of Geosciences, the California Academy of Sciences, the University of Bristol, ...
2021-03-17
(Vienna, March 17, 2021) When complex systems double in size, many of their parts do not. Characteristically, some aspects will grow by only about 80 percent, others by about 120 percent. The astonishing uniformity of these two growth rates is known as "scaling laws." Scaling laws are observed everywhere in the world, from biology to physical systems. They also apply to cities. Yet, while a multitude of examples show their presence, reasons for their emergence are still a matter of debate.
A new publication in the Journal of The Royal Society Interface now provides a simple explanation for urban scaling laws: Carlos Molinero and Stefan Thurner of the Complexity Science Hub Vienna (CSH) derive them from the geometry of a city.
Scaling laws in ...
2021-03-16
The UK variant of SARS-CoV-2 spread rapidly in care homes in England in November and December last year, broadly reflecting its spread in the general population, according to a study by UCL researchers.
The study, published as a letter in the New England Journal of Medicine, looked at positive PCR tests of care home staff and residents between October and December. It found that, among the samples it had access to, the proportion of infections caused by the new variant rose from 12% in the week beginning 23 November to 60% of positive cases just two weeks later, in the week beginning 7 December.
In the south east of England, where the variant was most dominant, the proportion increased from 55% to 80% over the same period. In London, where the variant spread fastest, ...
LAST 30 PRESS RELEASES:
[Press-News.org] Indirect surpassing CO2 utilization in membrane-free CO2 battery
