Dear Amravati Singh
The research article entitled "Water-induced hydrogenation of graphene/metal interfaces at room temperature: Insights on water intercalation and identification of sites for water splitting" will have a lot of insight into questions you have raised i hope this might solve your problem statement
Article Water-induced hydrogenation of graphene/metal interfaces at ...
Water splitting includes two half reactions catalyzed by two different materials. What are you asking about? The comm,on problem is the decomposition of coating by bubbles of forming O2 or H2
What is your metal?
Since the type and strength of metal interaction with the graphitic layer depends on the type of metal, the properties of the catalyst also change with the change of metal. On the other hand Yurii V Geletii is right about the decomposition and destruction of the coating layer in the water splitting harsh reaction condition.
Sina Safavi, Yurii V Geletii I m asking about the application of metal-doped in graphitic layer in HER and OER.
Thank you
Amravati Singh Now every things completely change. You said: if metal coated with graphite layer and it means core-shell structure. Well I must explain the mechanism of the water splitting reaction for you if you are asking about metal-doped graphene catalysts. We have two half reaction in water slitting prosses:
1) 2 H+(aq) + 2e− → H2(g)
2)2 H2O(l) → O2(g) + 4 H+(aq) + 4e−
The oxidation reaction is the bottleneck of the water splitting prosses. The metal doped graphene act as a catalyst for the oxidation reaction. The metal oxidize by light or electricity or chemical oxidant like CAN and metal loses electrons and holes are formed. Now the metal site is ready to accept the H2O or OH- as a ligand. Then a radical coupling or water nucleophilic attack occurs that forms O2(g) and the metal reduce to the former oxidation state.
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