Issue 45, 2024

CO2 reduction efficiency through electrolyte immersion in hierarchical bismuth–nickel catalysts

Abstract

Nanostructures are critical for improving the contact area with an electrolyte and catalytic efficiency for the CO2 reduction reaction (CO2RR). However, their hydrophobicity conflicts with the intended increase in the contact area and complicates the determination of the active contact area. Here, bismuth–nickel (BiNi) micro–nano hierarchical catalysts for the CO2RR were studied to understand the effects of electrolyte–catalyst contact area variation with the immersion duration in an aqueous electrolyte. The immersed BiNi samples showed about 13.4-fold higher formate production compared to the pristine BiNi sample. The 2-day pre-immersed BiNi sample exhibited faradaic efficiencies (FE%) of ∼80.1% for formate and ∼10% for H2 with a current density of 10.2 mA cm−2 at −1.5 V vs. Ag/AgCl. In contrast, the pristine BiNi catalysts exhibited an FE% of ∼12.9% for formate and ∼76.3% for H2 with a current density of 5.38 mA cm−2. Our experimental results reveal that the improved contact between the electrolyte and the catalyst surface through pre-immersion can lead to enhanced CO2RR efficiency for formate production using hierarchical BiNi catalysts.

Graphical abstract: CO2 reduction efficiency through electrolyte immersion in hierarchical bismuth–nickel catalysts

Supplementary files

Article information

Article type
Paper
Submitted
28 Aug 2024
Accepted
21 Oct 2024
First published
22 Oct 2024

Dalton Trans., 2024,53, 18346-18354

CO2 reduction efficiency through electrolyte immersion in hierarchical bismuth–nickel catalysts

Y. An, Y. Lee, Y. Ji, Y. D. Kim, H. O. Seo and D. Jung, Dalton Trans., 2024, 53, 18346 DOI: 10.1039/D4DT02441A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements