Designing Atomically Dispersed Au on Tensile-Strained Pd for Efficient CO<sub>2</sub> Electroreduction to Formate
Jinsol Bok, Si Young Lee, Byoung‐Hoon Lee, Cheonghee Kim, Dang Le Tri Nguyen, Ji Won Kim, Euiyeon Jung, Chan Woo Lee, Yoon Seok Jung, Hyeon Seok Lee, Jiheon Kim, Kangjae Lee, Wonjae Ko, Young Seong Kim, Sung‐Pyo Cho, Jong Suk Yoo, Taeghwan Hyeon, Yun Jeong Hwang
Abstract
electroreduction. Herein, we utilize the interaction between metals and metal-organic frameworks to synthesize atomically dispersed Au on tensile-strained Pd nanoparticles showing significantly improved formate production activity, selectivity, and stability with high CO tolerance. We found that the tensile strain stabilizes all reaction intermediates on the Pd surface, whereas the atomically dispersed Au selectively destabilizes CO* without affecting other adsorbates. As a result, the conventional COOH* versus CO* scaling relation is broken, and our catalyst exhibits 26- and 31-fold enhancement in partial current density and mass activity toward electrocatalytic formate production with over 99% faradaic efficiency, compared to Pd/C at -0.25 V versus RHE.