When evaluating the catalyst's effectiveness in the reaction, scientists will select a specific voltage on the current-voltage polarization curve of individual catalysts and compare the current they generate on the polarization curve. This assessment, called mass-specific activity (MSA), focuses on the activity at a specific voltage. A suitable catalyst should consistently have the highest current at any given voltage, as a higher MSA means better kinetics (closer to equilibrium potential). In comparison, a lower MSA means worse kinetics (further from equilibrium potential)(G.-R. . An example could be drawn from Figure to understand the current-voltage polarization curve better. With the equilibrium potential being approximately 1.23 volts, this means the overpotential of the catalyst is the difference of voltage between the equilibrium potential (approximately 1.23 volts) and the actual voltage of the two catalysts marked by the blue and red curve. Further, upon interpretation of the diagram, it can be seen that the catalyst represented by the blue curve has higher MSA than the red curve, meaning that it has better kinetics. This can be examined by drawing a line horizontally from any voltage and measuring the current at which they are. The higher current at any given voltage means a higher MSA and, therefore, better kinetics, which is the catalyst of the blue curve.