Ammonia is a critical ingredient in many important industrial and agricultural applications. The Haber–Bosch process is the primary process for large-scale ammonia production. A new study uses an experimental–theoretical approach to uncover how interfacial chemistry at the magnetite–water interface drives ammonia synthesis under ambient temperature and pressure. Read more »
Characterizing Membrane Fouling with Operando Experiments
Membrane filtration offers a cost-effective, energy-efficient approach to purify and desalinate water, but fouling limits the performance of these devices. A new study explored the new experimental design that allows one to study the dynamic fouling process in real time to improve the field’s understanding of how materials deposit, accumulate, and/or crystallize on the membrane’s surface. Read more »
Mechanics of a Floating Molecular Layer for CO2 Reduction
Researchers discovered how a layer of organic molecules on a nanoparticle surface detaches to create a highly catalytic pocket for reducing CO2 to CO. The ability to probe molecular-scale events under realistic conditions with nanometer resolution will help guide the design of responsive systems for a wide range of applications, from medicine to optoelectronics. Read more »
A Deep-Learning Analysis of Lithium-Plating Dynamics in Batteries
Lithium-metal solid-state batteries are a promising technology, but the deposition (plating) of lithium metal on electrode surfaces remains a significant technical hurdle. Here, researchers used micro-computed tomography data to train an artificial intelligence model to identify characteristics vital to improving battery performance. Read more »
Highly Selective Methane to Methanol Conversion on Inverse SnO2/Cu2O/Cu(111) Catalysts: Unique Properties of SnO2 Nanostructures and the Inhibition of the Direct Oxidative Combustion of Methane
Inverse catalysts generally consist of oxide nanoparticles supported on metal substrates, which can exhibit exceptional catalytic properties. The small SnO2 nanoparticles uniformly dispersed on a Cu2O/Cu(111) substrate enabled a unique SnO2–Cu2O interface that can completely convert methane to methanol directly under the environments of oxygen and water. Read more »
Scientists Grow Lead-Free Solar Material With a Built-In Switch
A new ferroelectric material—grown in the lab from cesium germanium tribromide (CGB)—opens the door to an easier approach to making solar cell devices. Unlike conventional solar materials, CGB crystals are inherently polarized, where one side of the crystal builds up positive charges and the other side builds up negative charges, no doping required. Read more »
A Photoelectrode Protection Scheme for Solar-Fuel Production
Microscopy, spectroscopy, and computational studies of a promising artificial-photosynthesis material led researchers to develop a model photoelectrochemical (PEC) cell with remarkable stability and longevity as it selectively converts sunlight and carbon dioxide into two promising sources of renewable fuels—ethylene and hydrogen. Read more »
New Device Advances Commercial Viability of Solar Fuels
A Berkeley Lab research team developed a new artificial photosynthesis device component that exhibits remarkable stability and longevity as it selectively converts sunlight and carbon dioxide into two promising sources of renewable fuels—ethylene and hydrogen. Read more »
Tuning Semimetallicity Using Thin Films and Interfaces
With support from ALS data, scientists gained new insight into a semimetal’s unusual electronic behavior. The work lays out a basic strategy for engineering the band structures of semimetallic compounds using dimensional confinement and reveals a new way of creating two-dimensional electron/hole gases by exploiting interfacial bonding. Read more »
Designing Selective Membranes for Batteries Using a Drug Discovery Toolbox
Researchers designed a polymer membrane with molecular cages built into its pores that hold positively charged ions from a lithium salt. These “solvation cages” increased lithium-ion flow by an order of magnitude and could allow high-voltage battery cells to operate at higher power and more efficiently, important for both electric vehicles and aircraft. Read more »