Dear all,
I was trying to deposit a powder sample onto an electrode and to test its electrocatalytic reactivity. I tried to suspend the powder sample in EtOH and then drop cast this ink solution on the electrode surface. However, I noticed a low electrical current during the CV measurement and I think this is because of the gap between the powder and the electrode surface. Also, I noticed that even the powder sample is physically adsorbed onto the electrode surface, the powder sample is easily detached from the electrode surface. Is there a better way to deposit this kind of powder catalyst onto the electrode surface? Thanks for your suggestion.
Dear Prosper,
Thanks for your kind share and suggestion. I just got one more question, these binders do not seem to be conductive, would they perturb or retard the electrocatalytic reactivity of the powder sample?
Another question is, in fact, I am trying some electrocatlytic hydrogen-evolution reaction, would the generated H2 gas pop out the binder?
In a first step,type of electrode must be known.In the second step,you can use some conductive polymers such as pyrrole for electrodeposition or natural polymer such as chitosan or other type polymer, nafion (a sulfonated tetrafluoroethylene based fluoropolymer-copolymerfor) casting method.Moreover, you can use electrodeposition for directly deposition of metal nanoparticles on surface of electrodes.
I think you could use a conductive carbon tape on your electrode and stick the powder to it. Be aware that Using the catalyst in the powder form should give you a small surface area.
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