Heat the oven to 400°F. Line a rimmed baking sheet with foil, set a wire rack on top, and brush the rack with olive oil.
Arrange the bacon halves on the rack and bake 6-7 minutes, until partly rendered but still flexible. Transfer the bacon to a plate and raise the oven to 425°F.
Pat the scallops very dry with paper towels and season both sides with salt and pepper. Wrap one bacon half around each scallop and secure with a toothpick.
Stir the maple syrup and Dijon mustard together in a small bowl and brush the mixture over the bacon.
Bake the scallops on the rack 10-12 minutes, until opaque and just firm and the bacon is crisp. If the bacon needs more color, broil 1-2 minutes, watching closely.
Rest 2 minutes, sprinkle with chives, and serve warm.