I have encountered the same problem as you while upgrading to iOS 11. I have tried to put my phone into recovery mode, but fail to be verified by iTunes. To fix iPhone stuck on apple logo, maybe you can try to put your iPhone into DFU mode, which differs from recovery mode. The DFU mode can help you turn on your phone without activating the boot loader. In this way, you can restore your phone to put it into normal mode. But it will also wipe your data stored on your phone. Hope this would help.