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Metal-Organic Framework Derived Bi-O-Sn/C Nanostructure: Tailoring the Adsorption Site of Dominant Intermediate for Highly Efficient CO 2 Electroreduction to Formate.
- Source :
-
Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Mar; Vol. 20 (10), pp. e2306129. Date of Electronic Publication: 2023 Oct 25. - Publication Year :
- 2024
-
Abstract
- Electrochemical CO <subscript>2</subscript> reduction into high-value-added formic acid/formate is an attractive strategy to mitigate global warming and achieve energy sustainability. However, the adsorption energy of most catalysts for the key intermediate *OCHO is usually weak, and how to rationally optimize the adsorption of *OCHO is challenging. Here, an effective Bi-Sn bimetallic electrocatalyst (Bi <subscript>1</subscript> -O-Sn <subscript>1</subscript> @C) where a Bi-O-Sn bridge-type nanostructure is constructed with O as an electron bridge is reported. The electronic structure of Sn is precisely tuned by electron transfer from Bi to Sn through O bridge, resulting in the optimal adsorption energy of intermediate *OCHO on the surface of Sn and the enhanced activity for formate production. Thus, the Bi <subscript>1</subscript> -O-Sn <subscript>1</subscript> @C exhibits an excellent Faradaic efficiency (FE) of 97.7% at -1.1 V (vs RHE) for CO <subscript>2</subscript> reduction to formate (HCOO <superscript>-</superscript> ) and a high current density of 310 mA cm <superscript>-2</superscript> at -1.5 V, which is one of the best results catalyzed by Bi- and Sn-based catalysts reported previously. Impressively, the FE exceeds 93% at a wide potential range from -0.9 to -1.4 V. In-situ ATR-FTIR, in-situ Raman, and DFT calculations confirm the unique role of the bridge-type structure of Bi-O-Sn in highly efficient electrocatalytic reduction of CO <subscript>2</subscript> into formate.<br /> (© 2023 Wiley-VCH GmbH.)
Details
- Language :
- English
- ISSN :
- 1613-6829
- Volume :
- 20
- Issue :
- 10
- Database :
- MEDLINE
- Journal :
- Small (Weinheim an der Bergstrasse, Germany)
- Publication Type :
- Academic Journal
- Accession number :
- 37880905
- Full Text :
- https://doi.org/10.1002/smll.202306129