No, that’s probably the fastest tempo you should be employing ever if pursuing hypertrophy over performance.
More like 4-6 second eccentric
If you prefer reading, search for “THE MAXIMUM MUSCLE BUILDING REP”
Here are some examples of cognizant repetitions
https://www.instagram.com/p/BuWgHEbnTed/
https://www.instagram.com/p/Bxd_qaeDd-Z/
There’s another article on Thibarmy, Beef Up Your Body Composition, where you can read more about which exercises are likely to respond well to this type of training.