(1) In response to the title question: As far as I’m aware of, there is no wrist guard designed specifically for ice skating.
(2) There are, however, wrist guards suitable, perhaps with minor modification, for ice skating. We should keep in mind the requirements for wrist guards.
(a) Wrist guards should absorb or redirect [or both] the force of impact.
(b) Wrist guards should limit the range of motion of the wrist [so you don’t snap it]. This is particularly important if you fall backwards. Note that the palm pad recommended by another poster provides cushioning to absorb some of the force of impact, but does nothing to prevent your wrist from snapping.
(c) Wrist guards should provide a proper amount of friction along the ice surface. Here we are faced with the Godilocks scenario; we want to avoid the extremes. Too little friction will cause an uncontrolled slide. Too much friction, stopping the wrists abruptly, will likely cause a jarring injury to some part of the body [by analogy, consider what happens if you are driving along the road and suddenly stomp hard on the brakes]. So you want just the right amount of friction to give you a short, but not abrupt, controlled sliding stop.
(3) I’ve tried two types of wrist guards. The first, which I already had as part of my rollerblade gear, was a conventional one with a hard smooth plastic splint and a pronounced raised V-notch at the wrist. This turned out to be a bad choice for ice skating, since the smooth raised V-notch would lead to an uncontrolled skid on the ice; even though I wore gloves, the raised V-notch did not allow my fingers to contact the ice. Also, these wrist guards were bulky, and difficult to put on and take off.
I’ve been wearing the Rollerblade Bladegear XT wrist guards (
http://www.rollerblade.com/usa/products/bladegear-xt-wristguard/) now for 5 yrs or so, and have been happy with them. My fingers get cold during skating, so I wear lightly-lined, thin leather gloves. I wear the wrist guards over the gloves. These wrist guards do not have a splint and raised V-notch. They have an integrated plastic palm and wrist plate; a comparatively flat geometry. They are compact and easy to put on and take off.
The palm and wrist plate by itself does not provide sufficient friction. During a fall, however, the flat geometry allows my leather-covered finger tips to contact the ice. The leather provides enough friction to prevent an uncontrolled slide. I did initially consider increasing the friction by taping the palm and wrist plate with Velcro tape [you can choose the plush, loop side or the bristly, hook side, depending on the additional amount of friction you want], but I found that wasn't needed, because the leather gloves were sufficient. If you skate without gloves (or with gloves that are too smooth), you will need to cover parts of the palm and wrist plate with Velcro, or other suitable material, to increase the amount of friction.
I’ve never broken a wrist, but I did sprain one a couple of times (slipping on icy sidewalks, not at the rink). So far, while skating, I’ve taken several hard falls (forwards and backwards) on my wrists, and the guards have worked.
