Directed Structural Evolution of Nickel Nanoparticles into Atomically Dispersed Sites for Efficient CO₂ Electroreduction.

ABSTRACT: Electrochemical CO₂ reduction (CO₂RR) to carbon monoxide (CO) offers a sustainable pathway for carbon utilization, yet challenges remain in terms of improving selectivity and activity. Herein, we report a Ni/NC catalyst synthesized via a milling - pyrolysis method, in which Ni particles anchored on nitrogen-doped carbon (NC) are electrochemically activated under an Ar atmosphere, leading to their structural evolution into single-atom Ni sites. After activation in Ar atmosphere, the current density nearly doubles (from ≈30 to ≈60 mA cm^-2), and concurrently, the Faradaic efficiency of CO stays at ∼90% with the potential set to -0.8 V vs. RHE. Comprehensive characterizations, including X-ray photoelectron spectroscopy (XPS), aberration - corrected scanning tra

SUBMITTER: Li X 

PROVIDER: S-EPMC12508711 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature