There is nothing special in the sacrament itself

"In order that we may obtain this faith, the ministry of teaching the Gospel and administering the sacraments was instituted. For through the Word and the sacraments, as through instruments, the Holy Spirit is given, and the Holy Spirit produces faith, where and when it pleases God, in those who hear the Gospel. That is to say, it is not on account of our own merits but on account of Christ that God justifies those who believe that they are received into favor for Christ's sake. Gal. 3:14, 'That we might receive the promise of the Spirit through faith.'
Our churches condemn the Anabaptist and others who think that the Holy Spirit comes to men without the external Word, through their own preparations and works." - The Book of Concord, The Augsburg Confession, Pg. 31 Article 5 [The ministry of the Church]