Calculation of active sites of amorphous molybdenum sulfide films as catalysts for electrochemical hydrogen. One reference just says that Later, the absolute components of the voltammetric charges (cathodic and anodic) reported during one single blank measurement were added. Assuming a one electron redox process, this absolute charge was divided by two. The value was then divided by the Faraday constant to get the number of active sites of the film. 

But for me, it is still hard to understand it.

Could anybody tell me in detail, if you did this job.

Thanks a lot!!