In general, a high linearity range, high sensitivity and selectivity of the H2O2 sensor can be achieved by: (i) using a base electrode with a high sensitivity towards H2O2 (e.g. a Pt electrode instead of GCE); (ii) using a host matrix with better structural (e.g. larger pore diameter) and electrical properties (e.g. high electrical conductivity), ensuring uniform dispersion of highly electrically conductive and catalytically active metal nanoparticles (e.g. Ag, Pt, Au nanoparticles) in a solid host; and (iii) an optimum electrode composition in terms of relative quantities of metal nanoparticles and host on the base electrode surface. A solid host is required for preventing aggregation of metal NPs so as to make their high specific surface area useful for electrochemical reaction. Hence, performance of different electrodes with dispersed metal NPs from literature was compared with the present work.