Kink-Controlled Gold Nanoparticles for Electrochemical Glucose Oxidation
Seungwoo Choi, Chang Liu, Da Hye Seo, Sang Won Im, Ryeong Myeong Kim, Jaeyeon Jo, Jeong Kim, Gyeong‐Su Park, Miyoung Kim, Tore Brinck, Ki Tae Nam
Abstract
Enzymes in nature efficiently catalyze chiral organic molecules by elaborately tuning the geometrical arrangement of atoms in the active site. However, enantioselective oxidation of organic molecules by heterogeneous electrocatalysts is challenging because of the difficulty in controlling the asymmetric structures of the active sites on the electrodes. Here, we show that the distribution of chiral kink atoms on high-index facets can be precisely manipulated even on single gold nanoparticles; and this enabled stereoselective oxidation of hydroxyl groups on various sugar molecules. We characterized the crystallographic orientation and the density of kink atoms and investigated their specific interactions with the glucose molecule due to the geometrical structure and surface electrostatic potential.