First Plane Powered By Hydrogen Fuel Cell

ZeroAvia conducted a test flight of its Dornier 228 testbed hydrogen plane aircraft on last month, making aviation history with its successful completion of the low-emission flight test. The hydrogen plane took off from Cotswold Airport in the United Kingdom and flew for approximately 10 minutes in total. Although the right side engines relied on fossil fuel kerosene for their power, the left engines were powered by a combination of hydrogen fuel cells (50%) and batteries (50%).

The plane, a 19-seat Dornier 228, is the largest plane ZeroAvia has tested in the air to date. It is also the largest plane to fly that is partially powered by a hydrogen fuel cell. As such, this was not only a record flight for ZeroAvia, but for low-carbon aviation, and a significant step for zero-emission flight.

At a press conference announcing the results of the test flight, ZeroAvia founder and CEO, Val Miftakhov said,  “This is putting us straight on the path to commercial launches.

Source: https://www.hydrogenfuelnews.com/

Novel System Sequesters CO2 And Generates Electricity

A recent study, affiliated with UNIST (South Korea) has unveiled a novel system, capable of producing hydrogen and electricity quickly and effectively while cutting carbon dioxide (CO2) emissions significantly.  Published in the journal 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-CO2 battery. Unlike the existing aqueous metal-CO2 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-CO2battery, 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 CO2with 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 CO2without 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.”

Source: https://www.eurekalert.org/

How To Make EV Hydrogen Fuel Cells Last More

An international research team led by the University of Bern has succeeded in developing an electrocatalyst for hydrogen fuel cells which, in contrast to the catalysts commonly used today, does not require a carbon carrier and is therefore much more stable. The new process is industrially applicable and can be used to further optimize fuel cell powered vehicles without CO₂ emissionsFuel cells are gaining in importance as an alternative to battery-operated electromobility in heavy traffic, especially since hydrogen is a CO₂-neutral energy carrier if it is obtained from renewable sources.

For efficient operation, fuel cells need an electrocatalyst that improves the electrochemical reaction in which electricity is generated. The platinum-cobalt nanoparticle catalysts used as standard today have good catalytic properties and require only as little as necessary rare and expensive platinum. In order for the catalyst to be used in the fuel cell, it must have a surface with very small platinum-cobalt particles in the nanometer range, which is applied to a conductive carbon carrier material. Since the small particles and also the carbon in the fuel cell are exposed to corrosion, the cell loses efficiency and stability over time.

An international team led by Professor Matthias Arenz from the Department of Chemistry and Biochemistry (DCB) at the University of Bern has now succeeded in using a special process to produce an electrocatalyst without a carbon carrier, which, unlike existing catalysts, consists of a thin metal network and is therefore more durable.

The catalyst we have developed achieves high performance and promises stable fuel cell operation even at higher temperatures and high current density,” says Matthias Arenz.

The results have been published in Nature Materials.

Source: https://www.unibe.ch/