For over past couple decades, manipulating materials at the nanoscale to develop efficient catalysts for various applications, including water treatment, has been the gold standard in the field. But a new study goes even smaller – down to a single atom, the theoretical limit in material downsizing. And results show a big improvement in efficiency, with surprising new properties that cannot be achieved by nanomaterials.
The study, led by the lab of Jaehong Kim, the Henry P. Becton Sr. Professor and Chair of Chemical & Environmental Engineering, was a collaboration between Yale, Arizona State University, and the Brookhaven National Laboratory. It was published this week in Nature Communications.
When it comes to water treatment catalysts, which are used to break down pollutants, smaller is better. That’s because it increases the surface area, which increases its kinetics. But nanomaterials, as small as they are, still have clusters of atoms buried beneath the surface that go unused.
For the study, the researchers synthesized a single atom of palladium on a silicon-carbide substrate. This new catalytic system significantly improved the kinetics of destroying harmful chlorinated pollutants in water. The system’s low cost is also critical to its success. The expense of palladium and other materials with valuable catalyst properties has been prohibitive in developing cost-effective water treatment systems.
“If you break expensive palladium catalyst down to a single-atom limit, all of sudden, it becomes so cheap that it opens up new opportunities, especially for applications such as cost-sensitive water treatment,” Kim said.
One particularly valuable property of the palladium atom is how selective it is when breaking down substances. That’s crucial because if a catalyst that breaks down more than it needs to – that is, non-toxic substances – it will be wasting energy. But palladium at the single-atom level selectively breaks down carbon-halogen bonds with nearly 100% selectivity, while leaving the rest of the molecule intact. Such a high selectivity is not possible with palladium nanoparticles, which are the current industry standard.
With all of these advantages over the standard nanomaterial catalyst, Kim said the study marks a “pretty important advance in the water treatment field.”
“This not only increases the kinetics and drastically reduces the cost, it means we can do selective pollutant destruction for water treatment for the first time,” Kim said.
To build on their breakthrough, the researchers are working on integrating the material into a hydrogenation reactor and electrochemical cell to make a modular water treatment system that targets various pollutants, with a particular focus on anthropogenic halogenated, toxic organics, including PFAS chemicals.
Original Article: A Breakthrough in Catalysts: Smaller than Nanoscale
More from: Yale School of Engineering & Applied Science | Arizona State University | Brookhaven National Laboratory
The Latest on: Single atom catalysts
- Netlist: Key Upcoming Catalystson March 22, 2023 at 12:52 pm
Read on if you know the Netlist story and want an update on current catalysts. Net cash used in operating activities for 2022 was primarily a result of net loss of $33.4 million, non-cash ...
- A catalyst pushes zinc-air batteries to record power densityon March 20, 2023 at 8:30 am
A new single-atom catalyst has now pushed the power density to record levels. This type of technology may push battery technology forward to help make the storage of clean energy more affordable ...
- 2023 Metallocene Catalyst Market: Thorough breakdown for industry leaders Prognosis by 2027on March 16, 2023 at 2:20 am
A thorough study of the "Metallocene Catalyst Market" Growth for 2023 is given in the research report. There are opportunities for local expansion, business planning, product offerings, and end-user ...
- High-loading single cobalt atoms on ultrathin MOF nanosheets for efficient photocatalytic CO2 reductionon March 15, 2023 at 3:51 pm
The synthesis of stable single-atom catalysts with high metal loading is desirable to boost photocatalytic CO 2 performance, which, however, has remained a great challenge. To overcome this ...
- The rate of reactionon March 14, 2023 at 9:04 pm
Only a very small mass of catalyst is needed to increase the rate of a reaction. However, not all reactions have suitable catalysts. Catalysts only affect the rate of reaction - they do not affect ...
- Researchers prepare ethylene by single-atom catalytic electroreduction of CO2on March 14, 2023 at 5:00 pm
Recently, a research team led by Prof. ZENG Jie from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) constructed a stable single-site copper ...
- News tagged with single atomon March 14, 2023 at 5:00 pm
Due to their considerable efficiency, catalysts made of just a few atoms ... for measuring in vivo biomechanical properties of tissue and even single cells. The precious metals, such as platinum ...
- Customizing catalysts for solid-state reactionson March 9, 2023 at 5:31 pm
Scientists at Hokkaido University and the Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) have developed the first-ever molecular catalyst specifically tailored for ...
- Designing Single-Atom Catalysts for Water Purificationon March 9, 2023 at 4:00 pm
In the past few years, nanoscale catalysts have gained a lot of focus in the area of water treatment. Materials at the nanoscale come with several unique and useful features to offer. Lately, ...
- Researchers prepare ethylene by single-atom catalytic electroreduction of CO2on March 3, 2023 at 8:35 pm
This work was published in Nature Communications. Single-site catalysts have attracted great attention due to their clear structure, high utilization ratio and high selectivity. It is commonly ...
via Bing News
The Latest on: Single atom catalysts
[google_news title=”” keyword=”single atom catalysts” num_posts=”10″ blurb_length=”0″ show_thumb=”left”]
via Google News