Hi can anyone point me in the direction where i can start looking where manufactures find 40 000 psi from through an injector and thin steel lines? A 9mm beretta round is 36 to 40000 psi im just wondering where manufactures get these figures from?

I am trying to gather data (power density, surface area, material type, inoculum, etc.) from electrodes used in MFC, but I wonder if there aren't already any open repository or databased with this kind of data (besides review papers ofc)

did anybody notice, what happened?

Hello guys, Im making the design for a fuel cell systemm and had a couple of questions about the water management side of things. First I now that the water is expulsed is in the form of vapor. If Im using a s PEMFC how can I reuse the excess water to humidify the FC while putting the least number of extra components. Also a couple of rapid fire questions:

DO you need an outside source of electricity to start up the electrochemical reaction or is the FC already able to start the reaction itself without an outside current source?

If im using liquid hydrogen, does the phase shift to gaseous happen during the injection from ambient heat or do I need to add some heating element?

Hello,

I am currently working on modeling a PEM fuel cell and using a fitting program to match experimental data. The results for the exchange current density (i₀) at the cathode (ORR) show orders of magnitude ranging from 10⁻¹⁶ to 10⁻⁶ A/cm². However, I have only found references supporting the range of 10⁻⁹ to 10⁻⁶ A/cm².

I have not come across any literature reporting or discussing values below 10⁻⁹ A/cm² or clearly defining the lowest possible order of magnitude. Given that I am working with Pt nanoparticles, I am wondering if these extremely low values from my fitting process are realistic or could be due to specific experimental conditions or fitting limitations.

Any guidance or relevant references would be greatly appreciated!

Are there any side reactions from the other things contained in atmospheric air?

Edit due to autocorrupt

Hey everyone! I'm a PhD student specializing in hydrogen fuel cell research, and I've launched a podcast called The Zero Emission Zone, where I break down the latest research papers in this exciting field.

Each episode takes a deep dive into a recent study, unpacking the science, innovations, and real-world implications. My goal is to make complex research accessible and engaging for anyone interested in sustainable energy and fuel cell technology.

If you're working on a paper you'd like to see featured, feel free to reach out—I’d love to showcase the amazing work happening in this space!

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From my research a hydrogen fuel cell in a car is about 50% efficient, but since its silent like electric cars where exactly is the waste energy going? In a combustion engine is obvious through sound, heat, and physical rumbling. How about fuel cells? Nobody seems to explain this.

Thanks.

Hello, I've a purpose built fuel cell with an active area of 5cm2 on the flow fields. The issue I'm having is that the MEAs supplied are 5cm by 5cm (25 cm2 total area). Is having the MEA bigger than the necessary active area going to hinder this? Help and advice much appreciated!

Quisiera formar un grupo de hijos de ministros, no importa si están dentro o fuera de LDM. El propósito es compartir experiencias y demoler el mito de que somos o fuimos un grupo elitista y privilegiado. Al menos a mi no me tocó esa suerte! Por el contrario, vivi junto con mis numerosos hermanos con muchas carencias y nuestros padres siempre nos ponían como ejemplo a la grey en cuanto a comportamiento cristiano. Estudie con mi propio esfuerzo y nadie me dio nada gratis.

Hey guys,

I am currently writing a thesis about integrated air supply/cathode systems for aviation purposes.

I am struggling to find any patents/articles on how different companies build their systems. Do you any good sources?

Best regards!

Anyone know anything about this? Thought it was interesting to see that Ford has a F-550 hydrogen fuel cell EV in development.

https://newsroom.socalgas.com/stories/socalgas-advances-towards-zero-emissions-fleet-with-delivery-of-new-ford-electric-vans

Starting an unconventional project, the cell would be around 18cm x 18cm. Nafion is RIDICULOUSLY expensive for this. I’d need 69 cells. Looked around at different AEM’s and it’d still be ridiculously expensive. Any advice?

Can someone tell me where i can find authentic price of Fe-N-C and platinum catalyst in fuel cell, if I can find it in Indian price it would be really helpful for my research

Hey guys!! Please post some sources of news and latest developments in Fuel cells that you follow the most and the ones you feel are worth knowing here! Thanks!

Zinc (Zn) ionism is toxic for the environment.

Hi everyone.

I've been trying to improve the Horizon Educational fuel cell car kit by producin my own Hydrogen, storing it and then utilizing that on the fuel cell (like on this video https://youtu . be/d85OX6yEwE0?si=Izk7rS0Scny6y3rC , minute 2:15)

The problem that I have is that when I plug my balloon to the fuel cell, and then to the motor, nothing happens (see picture).

I have no idea why and after watching some videos, I've come up with nothing :(

Any suggestions?

Hi

I heard that It can have environmental effect. But does the ph level in vapor matter? How does it change?

I have a sheet of Nafion 424 that I would like to form into a membrane bag. Is there a way to fuse the sheet to itself to make seams? It would also be nice to be able to patch holes with scrap pieces of Nafion if I had to.

I'm not sure if it's some combination of just heat/pressure/time, or if there is another component involved. It would just be so convenient considering the lead time from Ion Power for bags is something like 4 months.