In:
Nature Communications, Springer Science and Business Media LLC, Vol. 12, No. 1 ( 2021-04-09)
Abstract:
The gaseous product concentration in direct electrochemical CO 2 reduction is usually hurdled by the electrode’s Faradaic efficiency, current density, and inevitable mixing with the unreacted CO 2 . A concentrated gaseous product with high purity will greatly lower the barrier for large-scale CO 2 fixation and follow-up industrial usage. Here, we developed a pneumatic trough setup to collect the CO 2 reduction product from a precisely engineered nanotwinned electrocatalyst, without using ion-exchange membrane. The silver catalyst’s twin boundary density can be tuned from 0.3 to 1.5 × 10 4 cm −1 . With the lengthy and winding twin boundaries, this catalyst exhibits a Faradaic efficiency up to 92% at −1.0 V and a turnover frequency of 127 s −1 in converting CO 2 to CO. Through a tandem electrochemical-CVD system, we successfully produced CO with a volume percentage of up to 52%, and further transformed it into single layer graphene film.
Type of Medium:
Online Resource
ISSN:
2041-1723
DOI:
10.1038/s41467-021-22428-1
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2021
detail.hit.zdb_id:
2553671-0
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