Selective C–C Coupling in Carbon Dioxide Electroreduction via Efficient Spillover of Intermediates As Supported by Operando Raman Spectroscopy
Central South University · École Polytechnique Fédérale de Lausanne · +1 more institution
Abstract
Developing efficient systems for the conversion of carbon dioxide to valuable chemicals using solar power is critical for mitigating climate change and ascertaining the world’s future supply of clean fuels. Here, we introduce a mesoscopic cathode consisting of Cu nanowires decorated with Ag islands, by the reduction of Ag-covered Cu2O nanowires prepared via galvanic replacement reaction. This catalyst enables CO2 reduction to ethylene and other C2+ products with a faradaic efficiency of 76%. Operando Raman spectroscopy reveals intermediate formation of CO at Ag sites which undergo subsequent spillover and hydrogenation on the Cu nanowires. Our Cu–Ag bimetallic design enables a ∼95% efficient spillover of…
Citation impact
- FWCI
- 10.23
- Percentile
- 100%
- References
- 62
Authors
7Topics & keywords
- Chemistry
- Raman spectroscopy
- Carbon dioxide
- Coupling (piping)
- Spillover effect
- Spectroscopy
- Carbon fibers
- Inorganic chemistry