The two problems of enzyme-based biofuel cells are short lifetime and poor power density, both of which are related to enzyme stability, electron transfer rate and enzyme loading.
酶生物燃料电池的寿命短以及能量密度低都与酶的稳定性、电子迁移速率和酶载量相关。
2
So, these are poorelectron donors but also a good electron acceptors, and we call these non-metals.