Sciencemadness Discussion Board

Products of reaction

Neme - 17-11-2016 at 05:47

Platinum black powder can be manufactured from ammonium chloroplatinate by heating at 500 °C in molten sodium nitrate for 30 minutes.

I can't figure out all products of this reaction.
My guess: PtO2 + NH4Cl + NaCl + NO2 + some nitrogen oxides?

I can't find this reaction on internet, can you help me with this one?

CuReUS - 17-11-2016 at 06:43

https://en.wikipedia.org/wiki/Adams%27s_catalyst#Preparation
PtO2 is platinum dioxide whereas platinum black is a fine powder of Platinum.The two are not the same

[Edited on 17-11-2016 by CuReUS]

Neme - 17-11-2016 at 07:15

Quote: Originally posted by CuReUS  
https://en.wikipedia.org/wiki/Adams%27s_catalyst#Preparation
PtO2 is platinum dioxide whereas platinum black is a fine powder of Platinum.The two are not the same

[Edited on 17-11-2016 by CuReUS]


It is a two step synthesis which first step is heating ammonium chloroplatinate at 500 °C in molten sodium nitrate. Product of this reaction is reduced to platinum black afterwards.

CuReUS - 17-11-2016 at 09:18

Quote: Originally posted by Neme  

It is a two step synthesis which first step is heating ammonium chloroplatinate at 500 °C in molten sodium nitrate. Product of this reaction is reduced to platinum black afterwards.

then why have you written that you can get Pt black in the first step itself ?:P
Quote:
Platinum black powder can be manufactured from ammonium chloroplatinate by heating at 500 °C in molten sodium nitrate for 30 minutes.

You don't mention the reduction step in your first post.So you can't blame me for thinking that you didn't know the difference between the two.
btw,decomposition of the ammonium salt-https://youtu.be/7B-EwKOqqv4?t=705

Neme - 17-11-2016 at 09:32

Well I kinda did but you are right I should have mentioned in top too, sorry!
Quote: Originally posted by Neme  

My guess: PtO2 + NH4Cl + NaCl + NO2 + some nitrogen oxides?


The reation from wiki helped me to this, but I'm not sure if it is right

(NH4)2PtCl6 + 4NaNO3 -----> 2 NH4Cl + 4NaCl + PtO2 + 4NO2 + O2