Electrochemical Detection of Catechol Based on As‐Grown and Nanograss Array Boron‐Doped Diamond Electrodes

The electrochemical behavior of different redox systems and detection of catechol were performed on the as‐grown boron‐doped diamond (BDD) electrodes and the nanograss array BDD. Compared with as‐grown BDD, the electron transfer on the nanograss array BDD surface became slower toward the negatively charged Fe(CN) 6 3− , whereas changed little toward the positively charged Ru(NH 3 ) 6 3+ . The nanograss array BDD showed higher electrocatalytic activity toward the catechol detection than did the as‐grown BDD. Good linearity was observed for a concentration range from 5 to 100 μM with a sensitivity of 719.71 mA M −1 cm −2 and a detection limit of 1.3 μM on the nanograss array BDD.