Back to Search
Start Over
In situ transformation of a Bi-based MOF to a highly active catalyst for CO2 reduction.
- Source :
- New Journal of Chemistry; 9/14/2024, Vol. 48 Issue 34, p15112-15119, 8p
- Publication Year :
- 2024
-
Abstract
- Electrochemical carbon dioxide reduction reaction (ECO<subscript>2</subscript>RR) is an effective means to promote carbon cycling. Recently, Bi-based metal–organic frameworks (MOFs) have attracted significant attention due to their high efficiency for formic acid generation in ECO<subscript>2</subscript>RR, however, their composition and morphology transformation during electrocatalysis still lack a deep exploration. Herein, a Bi-MOF with 2,4,6-tris(4-carboxyphenyl)-1,3,5-triazine (H<subscript>3</subscript>TATB) ligand is used as the prototype to investigate its in situ transformation during ECO<subscript>2</subscript>RR. With various characterization methods, the detailed transformation processes are revealed. Firstly, the Bi-MOF was transformed into Bi<subscript>2</subscript>O<subscript>2</subscript>CO<subscript>3</subscript> due to ligand substitution in KHCO<subscript>3</subscript> electrolyte, resulting in changes in both shape and composition. Secondly, during ECO<subscript>2</subscript>RR, the Bi<superscript>3+</superscript> ions can be reduced into metallic Bi<superscript>0</superscript> nanoparticles and act as the real active component for ECO<subscript>2</subscript>RR. The resultant catalyst exhibits a high selectivity of up to 94.3% towards formate generation. At an optimal potential of −1.08 V vs. RHE, the catalyst can maintain a current density of −25 mA cm<superscript>−2</superscript> and a faradaic efficiency of formate over 90% for 14.5 hours. This work not only develops an efficient electrocatalyst for ECO<subscript>2</subscript>RR but also provides a new insight into the in situ reconstruction of MOF precursor into the active catalyst, which is useful for the design and synthesis of other materials. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 48
- Issue :
- 34
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 179256464
- Full Text :
- https://doi.org/10.1039/d4nj02279c