Using T2 gives a maximum prescale ratio of 1/1024, e.g. about 16kHz from the 16MHz clock. As this is an 8 bit timer it can divide that frequency only down by 256 yielding about 640Hz. Most probably a wider frequency range can be coverd with the TimerOne library.
Are you sure that you need 10Hz PWM? I'd expect 10kHz instead. As already mentioned you can generate 10Hz PWM easily in code.