Enhancing Hydrogen Evolution Activity of Au(111) in Alkaline Media through Molecular Engineering of a 2D Polymer. Issue 22 (18th March 2020)

• Record Type: Journal Article
• Authors: Alexa, Patrick; Lombardi, Juan Manuel; Abufager, Paula; Busnengo, Heriberto Fabio; Grumelli, Doris; Vyas, Vijay S.; Haase, Frederik; Lotsch, Bettina V.; Gutzler, Rico; Kern, Klaus
• Is Part Of: Angewandte Chemie international edition. Volume 59:Issue 22(2020)
• Page Start: 8411
• Page End: 8415
• Publication Date: 2020-03-18
• Subjects: density functional theory -- hybrid catalyst -- hydrogen evolution reaction -- polymers -- surface chemistry; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201915855
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: The electrochemical splitting of water holds promise for the storage of energy produced intermittently by renewable energy sources. The evolution of hydrogen currently relies on the use of platinum as a catalyst—which is scarce and expensive—and ongoing research is focused towards finding cheaper alternatives. In this context, 2D polymers grown as single layers on surfaces have emerged as porous materials with tunable chemical and electronic structures that can be used for improving the catalytic activity of metal surfaces. Here, we use designed organic molecules to fabricate covalent 2D architectures by an Ullmann‐type coupling reaction on Au(111). The polymer‐patterned gold electrode exhibits a hydrogen evolution reaction activity up to three times higher than that of bare gold. Through rational design of the polymer on the molecular level we engineered hydrogen evolution activity by an approach that can be easily extended to other electrocatalytic reactions. Abstract : Moving catalysts on the volcano : The electrochemical production of hydrogen can be promoted by the synergy between a two‐dimensional polymer and a gold electrode. Engineering the molecular structure of the polymer alters the adsorption energies of the reactants, intermediates, and products and helps to move gold towards the top of the volcano plot.