When looking to accelerate the club with the bottom of the swing arc, a first key position is to have a look at and the first key part of your technique to check is your grip. The grip is fundamentally the most important thing within your technique. Anyway it allows you to square the clubface correctly but in this circumstance it also allows you to hinge the wrist correctly, and produce the speed when you want it. Technically speaking as you hit the shot your — your wrist will hinge upwards on the backswing until they get to a point where they've hinged to about ninety degrees in relation to the wrists and the forearms. As you come down into the ball that hinge is maintained until you reach the bottom of your swing when those wrists then extend.
It is that extension of the wrists coupled with the moving of the body that produce the club head speed that you need. If you don't have a correct grip or if you have a grip which is prohibiting this, then you won't be able to produce the amount of club head speed that you need. Now there are many variations of grip that you can use but the key for this, the key for this is how you place the club in your left hand if you are a right-handed golfer. What you don't want to be seeing as you place the grip is for it to be running too much through the palm. What you need is this grip to be running much more through the fingers. As a very quick test if you run that grip through your palm, and then wrap the hand over as much as you can and just have a few swings you'll notice how awkward it is to actually hinge the wrist correctly.
If you get that wrist running down more through the fingers and produce that same kind of practice swing, you'll notice how you have a lot more mobility within the wrist, a lot more mobility within the hand. And mobility equals distance and it equals power. So that's the first place that you want to be checking if you need that little bit of extra distance. If you are struggling producing that hinge and that whipping action as you move through the ball, the first place to check is the grip and to make sure that it's running correctly from the base of the little finger into the middle of the index finger, and then allowing that left hand to wrap over.