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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Heinrichs, Jason M. J. J.
Eindhoven University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2024Isolating Al Surface Sites in Amorphous Silica-Alumina by Homogeneous Deposition of Al 3+ on SiO 2 Nanoparticlescitations
- 2023Evolution of bismuth oxide catalysts during electrochemical CO 2 reductioncitations
- 2023Evolution of bismuth oxide catalysts during electrochemical CO2 reductioncitations
- 2023Role of strontium cations in ZSM-5 zeolite in the methanol-to-hydrocarbons reactioncitations
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article
Evolution of bismuth oxide catalysts during electrochemical CO2 reduction
Abstract
<p>Bismuth is a promising electrocatalyst for active and selective CO<sub>2</sub> electroreduction to formate. Herein, we investigated the evolution of various Bi-based catalysts (β-Bi<sub>2</sub>O<sub>3</sub> nanoparticles, BiOBr nanosheets, Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> nanosheets, and large α-Bi<sub>2</sub>O<sub>3</sub> and β-Bi<sub>2</sub>O<sub>3</sub> particles) during reaction. Apart from the α-Bi<sub>2</sub>O<sub>3</sub> particles, all the electrocatalysts reach the same Faradaic efficiency (93 ± 2%) and current density during potentiostatic operation, and their morphology changed to nanosheets. This change in morphology can be linked to the formation of Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> layers, which are prone to reduction to metallic Bi. The final phase and morphology depend on the size of the Bi precursor. Quasi-in situ XPS suggests that a Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> contribution persists on the surface even for the reduced catalysts. At a current density of 200 mA/cm<sup>2</sup>, all catalysts reduce to metallic Bi without forming a well-defined sheet morphology. Only for the Bi<sub>2</sub>O<sub>3</sub> nanoparticles can a FE above 90% be maintained.</p>