Doping palladium with tellurium for the highly selective electrocatalytic reduction of aqueous CO₂ to CO.

ABSTRACT: Designing highly selective and energy-efficient electrocatalysts to minimize the competitive hydrogen evolution reaction in the electrochemical reduction of aqueous CO₂ remains a challenge. In this study, we report that doping Pd with a small amount of Te could selectively convert CO₂ to CO with a low overpotential. The PdTe/few-layer graphene (FLG) catalyst with a Pd/Te molar ratio of 1 : 0.05 displayed a maximum CO faradaic efficiency of about 90% at -0.8 V (vs. a reversible hydrogen electrode, RHE), CO partial current density of 4.4 mA cm^-2, and CO formation turnover frequency of 0.14 s^-1 at -1.0 V (vs. a RHE), which were 3.7-, 4.3-, and 10-fold higher than those of a Pd/FLG catalyst, respectively. Density functional calculations

SUBMITTER: Tao H 

PROVIDER: S-EPMC5868300 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature