-A A +A
Recently, several researchers have claimed the existence of superior catalytic activity associated with topological materials belonging to the class of Dirac/Weyl semimetals, owing to the high electron conductivity and charge carrier mobility in these topological materials. By means of X-ray photoelectron spectroscopy, electrocatalytic tests, and density functional theory, we have investigated the chemical reactivity (chemisorption of ambient gases), ambient stability, and catalytic properties of PdSn4, a topological semimetal showing Dirac node arcs. We find a Tafel slope of 83 mV in the hydrogen evolution reaction (HER) dec–1 with an overpotential of 50 mV, with performances resembling those of pure Pd, regardless of its limited amount in the alloy, with a subsequent reduction in the cost of raw materials by ∼80%. Remarkably, the PdSn4-based electrode shows superior robustness to CO compared to pure Pd and …
American Chemical Society
Publication date: 
7 Jun 2021

Danil W Boukhvalov, Chia-Nung Kuo, Silvia Nappini, Andrea Marchionni, Gianluca D’Olimpio, Jonathan Filippi, Silvia Mauri, Piero Torelli, Chin Shan Lue, Francesco Vizza, Antonio Politano

Biblio References: 
Volume: 11 Pages: 7311-7318
ACS Catalysis