The catalytic activity of metal sulfur catalysts is primarily due to the presence of active sites on the metal sulfide surface. These sites facilitate the adsorption and activation of reactants. For example, in hydrodesulfurization, the sulfur atoms in the catalyst help to break the carbon-sulfur bonds in sulfur-containing compounds, converting them into hydrogen sulfide and hydrocarbons. The choice of metal and the preparation method significantly influence the catalyst's performance and selectivity.
