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Mass transport enhancement effect induced by superstructure catalyst for carbon dioxide reduction to formic acid.
- Source :
-
International Journal of Hydrogen Energy . Nov2023, Vol. 48 Issue 91, p35572-35583. 12p. - Publication Year :
- 2023
-
Abstract
- The CO 2 electrochemical reduction reaction (CO 2 ERR) offers an effective way to solve the problems of energy storage fluctuation and CO 2 over-emission at the same time. However, the mass transfer limitation during CO 2 ERR owing to the gaseous property of CO 2 greatly restricts the efficiency and selectivity of CO 2 reduction. Here, we report, for the first time, the design of a copper-zinc (CuZn) bimetal decorated superstructure catalyst (CuZn@KCA) via capitalizing on porous N-doped konjac glucomannan (KGM) aerogel and CuZn metal organic frameworks (CuZn-MOF), based on multiphysics infinite elemental simulations. The CuZn@KCA catalysts show high performance for CO 2 ERR (faradaic efficiency for HCOOH reaches 75% at −1.0 V vs. RHE). As demonstrated by infinite elemental simulations and detailed characterizations, the improved CO 2 ERR is attributed to the mass transfer enhancement effect of the superstructure catalyst on the reaction process (The mass transfer with CuZn@KCA is 16 times higher than that with CuZn-MOF). As such, the strategy for crafting a hierarchical superstructure might open up an avenue to improve the reaction activity of CO 2 ERR. • CuZn@KCA superstructure catalyst is designed and fabricated through finite element simulations and ice-templated method. • CuZn@KCA exhibits prominent CO 2 ERR performance and excellent stability for long time operation. • Fast charge and mass transfer rates attributed to hierarchical superstructure lead to higher CO 2 conversion FE. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 48
- Issue :
- 91
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 173474045
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2023.05.285