“…In the past two decades, deep eutectic solvents (DESs) composed of a hydrogen bond donor (HBD) and hydrogen bond acceptor (HBA), a kind of IL analogue, have been applied in many fields including electrochemistry, 41,42 organic reaction, 43,44 material synthesis 45 and gas absorption. [46][47][48] Compared with ILs, DESs have extra features of simple preparation, low cost, sustainability and biodegradability.…”