Green hydrogen: ‘Artificial leaf’ becomes better under pressure

Findings can increase the efficiency of electrochemical and photocatalytic devices

02-Aug-2024 - Hydrogen can be produced via the electrolytic splitting of water. One option here is the use of photoelectrodes that convert sunlight into voltage for electrolysis in so called photoelectrochemical cells (PEC cells). A research team at HZB has now shown that the efficiency of PEC cells can be ...

From waste to value: The right electrolytes can enhance glycerol oxidation

"Our research could help to convert biomass by-products into valuable chemicals more efficiently"

03-Jul-2024 - When biomass is converted into biodiesel, huge amounts of glycerol are produced as a by-product. So far, however, this by-product has been little utilised, even though it could be processed into more valuable chemicals through oxidation in photoelectrochemical reactors. The reason for this: low ...

Molecular orbitals determine stability

The results could also help industry to optimise the stability of coordination polymers

14-Feb-2024 - Carboxylic acid dianions (fumarate, maleate and succinate) play a role in coordination chemistry and to some extent also in the biochemistry of body cells. An HZB team at BESSY II has now analysed their electronic structures using RIXS in combination with DFT simulations. The results provide ...

Focused ion beam technology: a single tool for a wide range of applications

From physics, materials science and chemistry to life sciences and even archaeology

15-Jan-2024 - Processing materials on the nanoscale, producing prototypes for microelectronics or analysing biological samples: The range of applications for finely focused ion beams is huge. Experts from the EU collaboration FIT4NANO have now reviewed the many options and developed a roadmap for the future. ...

Green hydrogen: Co-production of valuable chemicals boosts profitability

Co-production concept is very flexible; different products can be produced in the same plant depending on demand

10-Oct-2023 - It is clear that it works: There are already approaches today to use solar energy for the electrolysis of water and to produce hydrogen. Unfortunately, this "green" hydrogen has so far been more expensive than "gray" hydrogen from natural gas. But the production of green hydrogen with sunlight ...

Surface analysis of catalyst particles in aqueous solutions

The results are relevant for the development of efficient photoelectrodes for the production of green hydrogen

25-Jul-2023 - Green hydrogen can be produced directly in a photoelectrochemical cell, splitting water with solar energy. However, this requires the development of super-efficient photoelectrodes that need to combine many talents at the same time: They must be excellent at converting sunlight into electricity, ...

HZB and University of Jena found Helmholtz Institute for Polymers in Energy Applications

Developing internationally competitive energy materials

22-Jun-2023 - Friedrich Schiller University Jena and the Helmholtz-Zentrum Berlin (Helmholtz Centre for Materials and Energy, HZB) are jointly founding the "Helmholtz Institute for Polymers in Energy Applications" (HIPOLE) on 1 July 2023. The aim of HIPOLE is to develop sustainable polymer materials for energy ...

Green hydrogen: How photoelectrochemical water splitting may become competitive

22-Mar-2023 - Sunlight can be used to produce green hydrogen directly from water in photoelectrochemical (PEC) cells. So far, systems based on this "direct approach" have not been energetically competitive. However, the balance changes as soon as some of the hydrogen in such PEC cells is used in-situ for a ...

New monochromator optics for tender X-rays

Highly precise spectromicroscopic measurements of nanostructured systems

06-Dec-2022 - Until now, it has been extremely tedious to perform measurements with high sensitivity and high spatial resolution using X-ray light in the tender energy range of 1.5 - 5.0 keV. Yet this X-ray light is ideal for investigating energy materials such as batteries or catalysts, but also biological ...

Lithium-Sulfur batteries: First multimodal analysis in pouch cell format

Evaluation shows how the electrolyte affects the formation of unwanted sulphur particles and polysulphides

24-Feb-2022 - Lithium-sulphur (Li/S) batteries have significantly higher energy densities than conventional lithium-ion batteries, but age very quickly. Now, for the first time, a team at HZB has investigated Li/S batteries in the industry-relevant pouch cell format with different electrolytes during ...