Catalysis is that the increase within the rate of a reaction of 1 or more reactants thanks to the participation of a further substance called a catalyst. Unlike other reagents within the reaction, a catalyst isn't consumed by the reaction. With a catalyst, less free energy is required to succeed in the transition state, but the entire free energy from reactants to products doesn't change. A catalyst may participate in multiple chemical transformations. The effect of a catalyst may vary thanks to the existence of different substances referred to as inhibitors or poisons or promoters. The other of a catalyst, a substance that reduces the speed of a reaction, is an inhibitor. As per available reports about 257 journals, 180 Conferences, 85 workshops are presently dedicated exclusively to Catalysis and about 198000 articles are being published on the present trends in Catalysis. In terms of research annually, USA, India, Japan, Brazil and Canada are a number of the leading countries where maximum studies associated with Catalysis are being administered.