You are NOT asking a sensible question. Do you mean.. 'is there a catalytic method of recycling a catalyst' ?? If so which catalyst .. are you talking about metals?

Dr. Robert L Baxter, Yes I am talking about metals and yes I mean "is there a catalytic method of recycling a catalyst"?? Thank you for wording the question in a better manner. It would be nice of you to answer the question now.

A catalyst increases the reaction rate. A reaction can be CATALYZED." How do you define "a catalytic method?"

Outside my field of expertise

There is a problem with definitions here. The tru definition of a catalyst is that it isunchanged in a reaction... otherwse it is a reagent.  Metal catalysts however can get 'exhausted' usually oxidised. Poor little things. Other than removing them and reducing them I don't know what to do. If you come up with a catalytic method for Pt or Pd patent it'

Quick comment. The catalyst of a redox reaction can change its oxidation state but it is considered as unchanged. 

true Yurii; I was being a very simplistic.. but I can't think of a 'catalytic regeneration process'

I bow to Dr Maji... yes ( I even taught this once) he certainly cited the best example. Looking through my notes the reference  Angew. Chem. Int. Ed. 2009, 48, 9034- came up. That might help

I agree with Dr. Maji that "Both Pd and Cu are acting as catalysts". This system has two catalytic cycles. I would not call Pd2+ as a true catalyst, I would call it a true "reactive species" towards C2H4 

I understand the the difference, but it is rather academic Yurii. ... I agree that Pt2+ is a reagent in the reaction (in that it is converted to Pt(0))  'BUT it is being being recycled to Pt(0) in the Cu2+ reaction' so I tend agree with Maji. Whatever, this is a good  example of catalyst regeneration in situ.

A catalytic reaction proceeds through a sequence of chemical reactions called a catalytic cycle. A catalysts enters into this cycle as a reagent and comes out as a product. In numerous cases a catalyst looses its activity by involving in side reactions This inactive form of a catalyst can be regenerated. This is a definition of catalyst regeneration. An overall catalytic reaction may proceed through several catalytic cycles. Therefore, "a catalytic method of recycling a catalyst" does not make much sense. 

Given your argument I cannot but agree. But this might just be just semantics.The  Pd2+ catalyst enters the cycle...and emerges the (TOTAL) cycle unchanged, the Cu/Pt  reaction is (as you point out ) balanced.