Activating inert non-defect sites in Bi catalysts using tensile strain engineering for highly active CO₂ electroreduction.

ABSTRACT: Bi-defect sites are highly effective for CO₂ reduction (CO₂RR) to formic acid, yet most catalytic surfaces predominantly feature inert, non-defective Bi sites. To overcome this limitation, herein, tensile strain is introduced on wholescale non-defective Bi sites. Under rapid thermal shock, the Bi-based metal-organic framework (Bi-MOF-TS) shows weakened Bi-O bonds and produced tiny Bi clusters. During electrochemical reduction, these clusters create numerous continuous vacancies, inducing weak tensile strain over a large range of surrounding non-defective Bi sites. This strain enhances *OHCO intermediates adsorption and substantially lowers the reaction barrier. As a result, Bi-MOF-TS achieves a faradaic efficiency above 90% across 800 mV potential range, with an impre

SUBMITTER: Chen X 

PROVIDER: S-EPMC11850590 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature