High‐Performing Atomic Electrocatalyst for Chlorine Evolution Reaction
Miran Ha, Pandiarajan Thangavel, Ngoc Kim Dang, Dong Yeon Kim, Siraj Sultan, Jae Sung Lee, Kwang S. Kim
Abstract
Abstract Electrocatalysts facilitating chlorine evolution reaction (ClER) play a vital role in chlor–alkali industries. Owing to a huge amount of chlorine consumed worldwide, inexpensive high‐performing catalysts for Cl 2 production are highly demanded. Here, a superb ClER catalyst fabricated through uniform dispersion of Pt single atoms (SAs) in C 2 N 2 moieties of N‐doped graphene (denoted as Pt‐1) is presented, which demonstrates near 100% exclusive ClER selectivity, long‐term durability, extraordinary Cl 2 production rate (3500 mmol h −1 g Pt −1 ), and >140 000‐fold increased mass activity over industrial electrodes in acidic medium. Excitingly, at the typical chlor–alkali industries’ operating temperature (80 °C), Pt‐1 supported on carbon paper electrode requires a near thermoneutral ultralow overpotential of 5 mV at 1 mA cm −2 current density to initiate the ClER, consistent with the predicted density functional theory (DFT) calculations. Altogether these results show the promising electrocatalyst of Pt‐1 toward ClER.