Is there a catalyst for silane cross-linking polyolefins other than organotin?

Is there a catalyst for silane cross-linking polyolefins other than organotin?
Organic antimony can also be used. Dibutyltin laurate maleate, dioctyltin laurate, dodecylbenzenesulfonic acid, naphthalene sulfonic acid, etc. can be used. Traditional warm water cross-linked polyethylene mostly uses organotin compounds as catalysts, but in recent years silane naturally cross-linked polyethylene can be completed under natural conditions.