NurdRage - 2012-04-16
We show how to make Manganese Dioxide electrodes. Warning: Nitric acid is corrosive and nitrogen dioxide is toxic. This experiment should be performed outside or in a fume hood. Take 1 gram of highly highly pure manganese dioxide and add 1.45g of oxalic acid dihydrate. Then add in 5 mL of water. The oxalic acid will react with the manganese dioxide to form manganese carbonate along with water and carbon dioxide. When the reaction slows down, carefully add in 1.7mL of nitric acid a few drops at a time. The nitric acid will neutralize the manganese carbonate and produce manganese nitrate and carbon dioxide. Pipette the liquid to another container, away from the excess manganese dioxide. Evaporate the solution until it just starts to precipitate/crystallized. To make the electrodes take a sanded titanium strip and immerse in concentrated hydrochloric acid until it bubbles evenly. Wash off the excess acid with distilled water. Apply a layer of manganese manganese solution to the titanium and then place the titanium on the hot plate set to least 300 celsius. Press down with a rod or spatula and as the electrode heats up the manganese nitrate will decompose into manganese dioxide and release nitrogen dioxide. When the electrode stops belching out brown nitrogen dioxide, immerse the electrode in water and wipe away any loosely bound manganese dioxide. Then apply another layer of manganese nitrate and repeat the process as many times as necessary. Eventually you'll have a manganese dioxide on titanium electrode.
Due to the restriction of sales of oxidizer around the world, this video is absolutely crucial for thousands of researchers. Very good work for us. But at the end of the video is not clear from the translation of this: How long was the anode been tested? Hour? 3 days ? A week?
It is same important as preparation the whole procedure. The MnO2 surface looks pretty awful. So I am afraid that it will fall out from titanium after 2 hours. Thanks for the reply.
I know, even looks pretty awful anode will better than pure titan (instant passivation)
Next thing, how is concentration hot HCl 30 % ? Or dilute 10% ? Thanks...Dr.
This is why I love science :D Its so interesting
Thank you for the time and effort you put into these videos.
Hi man!! Great stuff you make my admirations sent to you.
Can you tell me - can I use other methal than titanium for the deposition??
Thanks!
Interesting video. This is exactly what I'm studying right now :]
Watching your videos made me pass my chem finals without putting any effort into it whatsoever. Coolio.
Great work NurdRage! Love your videos. Have you tried this in your electrochemical method for sulfuric acid from copper sulfate? Also, do you think that a similar electrochemical method (as for sulfuric acid production) could be applied to make nitric acid or hydrochloric acid or other mineral acids from ammonium or metal salts?
Great electrochemistry info!
This makes me really excited about starting my Chem Phd next fall! I seriously love your videos!!
Hey person from 9 years ago, How did your phd go?
Thanks for another cool video. I'm really interested in chemistry and am curious what role chemistry may play in cancer treatment or research.
love your videos! Your printed logo on the back looks like it was done 20 years ago with Banner Mania. lol
Nice improvement! Looking forward to the next video!
most metals (copper, tin, steel, platinum, lead, zinc, etc.) as well as graphite can be used as cathodes.
I would like to know the process of making Mixed Metal Oxide (MMO) electrode. Can you please point me to a right direction? Thanks
Hey, nurdrage, I love your videos. I have been watching them for quite a while and really hope you don't stop making them any time soon. I am about to go off topic from this video, but regarding your coalescing potassium video: would that method be sufficient for doing the same with lithium? I am on a high school senior budget and am hesitant to pop open my last three lithium batteries.
Very nice video. It would be interesting to see many of these in action to see how powerful they could be.
Thank you for posting! :3
You are my absolute favorite channel that teaches me how to make Manganese Dioxide electrodes.
ah cant wait to start my degree in chemistry
I love chemistry and find it fascinating how particles can interact in such unique and amazing ways. please keep up the excellent work, these videos keep the imagination growing and really does push me to go on to a university level chemistry education after recently finishing high school. PS: My grade 12 chem teacher loves your videos.
I don't think i'd ever do these experiments myself, but i do enjoy watching your videos. They are interesting and intriguing.
I would love to hear this guy on Sulfur Hexafluoride ;-)
I enjoy your videos keep em coming.
Can you please do a video on how to make Tert-Butyllithium (CH3)3CLi? :D
When will you show the proper way to make kclo3? I'd love to see a way for small and large quantities.
Wow nurdrage you vids are just outstanding for education🙏
Great to have you back!
Awesome...I wish you taught us how to made something like...nafion...hahaha or at least told us how difficult it is to make something like that with normal equipment. But, I believe you could tell me one thing or two about a subtstitute for the protonic exchange membrane to build an electrolyser/HFC?
Did you see how black the titanium electrode turned after just one coat?
i guess we can only dream that he'll do it :,(
could you somehow teach us some fire work videos
So I assume the theory from the first video, that Manganese Nitrate oxidizes the Titanium to passivating Titanium oxide is wrong?
Você poderia criar um vídeo ensinando como fazer eletrodos de dióxido de chumbo(Pbo2).Obrigado.
hey man i love you vids even though i dont understand half of it thanks for making these vids!
Great videos, though if you had manganese carbonate, could you use nitric acid directly, to create manganese nitrate?
Have you ever experimented with Iridium oxide for anodes?
Excellent! Nothing is more fascinating than chemistry. Love your novel approaches and tenacity in solving problems few others write about.
I would like these videos to include potential uses of the compounds made. What good are MnO2 electrodes?
I am glad to see you put up another video. I am getting bored with all the make-up tutorials. Hope you're not too busy to keep making more!
This is nice. I'm still learning about this chemistry stuff as to the fact I'm in college. I would like to know what a good cathode would be. This anode seems to be really cheap so what can be a good cheap cathode? Would graphite work alright?
thank you for letting me and others know that just incase they might have that question on their minds.
What are best electrodes for electrolyzing Copper(II) sulfate to get sulfuric acid?
NR, would this process work with lead nitrate? I can't get the pure MnO.
Congratulations for all your videos... You must have studied a looot!!! I'm just sarting chemical engineering.
Thanks!!
2 Pb(NO3)2 (s) → 2 PbO (s) + 4 NO2 (g) + O2 (g). It will produce lead(II) oxide, not lead(IV) oxide. So you can't.
NurdRage I sent you a message regarding an idea for an experiment to make a novel perchlorate anode by putting a certain oxide layer over an MMO coated Ti mesh anode(cheaply available on ebay). Please respond and let me know what you think of the idea.
Old video, new question. I have looked at the sciencemadness discussions, including the guides and experiments by Xenoid, and nowhere do they mention plating MnO2 directly onto titanium. Always an intermediary layer, be it cobalt oxide, tin oxide, etc. In the previous video you mention that the MnO2 is oxidizing the titanium substrate and that's why it needs the cobalt oxide intermediary layer.
And yet in this video the MnO2 is plated directly on titanium. How well did the electrodes fare? I've seen mentions of similar electrodes with no intermediate layer becoming passivated relatively quickly.
I also tried MnO2 directly on ti anode and let it run on 100mA/cm² for 8 days in a 1L cell. I see no degradation at all on the surface. You also don't need to etch the surface with HCl, simply use a steel brush on a drill to rough the surface before coating.
ahhhh.. now it all makes sense, sorry for the confused question it's late (or better early) - keep up the good work fellow chemist :)
With the help of this trick, can lead dioxide electrodes be made?
Using lead nitrate
Another nurdrage video over my head, but yet I keep watching them. Why?
I don't know shit about chemistry but I still enjoy these videos ;)
GREENPOWERSCIENCE - 2012-04-16
Great information:-)