Bi@Sn Core-Shell Structure with Compressive Strain Boosts the Electroreduction of CO₂ into Formic Acid.

ABSTRACT: As a profitable product from CO₂ electroreduction, HCOOH holds economic viability only when the selectivity is higher than 90% with current density (j) over -200.0 mA cm^-2. Herein, Bi@Sn core-shell nanoparticles (Bi core and Sn shell, denoted as Bi@Sn NPs) are developed to boost the activity and selectivity of CO₂ electroreduction into HCOOH. In an H-cell system with 0.5 m KHCO₃ as electrolyte, Bi@Sn NPs exhibit a Faradaic efficiency for HCOOH (FE_HCOOH) of 91% with partial j for HCOOH (j _HCOOH) of -31.0 mA cm^-2 at -1.1 V versus reversible hydrogen electrode. The potential application of Bi@Sn NPs is testified via chronopotentiometric measurements in the flow-cell system with 2.0 m KHCO_3</

SUBMITTER: Xing Y 

PROVIDER: S-EPMC7675058 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature