S1 Supplementary Information for Enhancing the Kinetics of Self-oscillating Chemical Reactions via Catalytic Ceria Nanomats Vishesh Sharma 1 , Pratyush Dayal 1 * 1 Department of Chemical Engineering, Indian Institute of Technology Gandhinagar, Gujarat-382355, India *Email: pdayal@iitgn.ac.in 1. Incorporating nanocatalysts’ activity in Oregonator model: The effect of nanocatalysts on the reaction rate is included in the model by virtue of the catalysts’ activity for reaction, R5, reproduced below,  +   5 1 2  The activity, , of the catalyst is defined as the ratio of the reaction rate in the presence of the  nanocatalyst ( ) to that of the traditional solution-based catalyst ( ), which can be ―  ― 0 rewritten as ―  = ( ―  0 ) =  ( 5 ′ ) Where, is the rate constant for reaction R5 catalysed by traditional catalyst. The activity of  5 ′ the catalyst, especially, nanocatalyst is a function of its concentration, 1–4 and therefore, ,  ∝ ; here is the order of the reaction corresponding to . Using the expression of in the []     rate expression, we get, ―   =  5  where, the apparent rate constant, . Here, is the lumped constant, also known  5 =  50 ′[]   50 ′ as concentration independent rate constant, which includes and the proportionality constant  5 ′ for the activity, . The rate expression given above corresponds to the 2 nd term on the RHS of  the Eq. (3) of the manuscript. Thus, we see that although the activity of the catalyst is included in the model the basic form of the equations remains the same as the Oregonator model. 2. EDS results of ceria nanosheet: The elemental composition of the nanocatalyst was determined using the Energy Dispersive X-rays spectroscopy technique. The result of the technique has been tabulated below