Complex sentence: In addition to the active metal the catalysts typically contain a number of promoters, including potassium and copper, as well as high-surface-area binders/supports such as silica, alumina, or zeolites.
Split into simpler sentences: In addition to the active metal the catalysts typically contain a number of "promoters," including potassium and copper. Catalysts are supported on high-surface-area binders/supports such as silica, alumina, or zeolites.