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Your search keyword '"Jaouen, Frédéric"' showing total 7 results
Start Over Author "Jaouen, Frédéric" Journal angewandte chemie international edition
7 results on '"Jaouen, Frédéric"'

1. Potential‐Induced Spin Changes in Fe/N/C Electrocatalysts Assessed by In Situ X‐ray Emission Spectroscopy

Author

Saveleva, Viktoriia A., primary, Ebner, Kathrin, additional, Ni, Lingmei, additional, Smolentsev, Grigory, additional, Klose, Daniel, additional, Zitolo, Andrea, additional, Marelli, Elena, additional, Li, Jingkun, additional, Medarde, Marisa, additional, Safonova, Olga V., additional, Nachtegaal, Maarten, additional, Jaouen, Frédéric, additional, Kramm, Ulrike I., additional, Schmidt, Thomas J., additional, and Herranz, Juan, additional

Published
2021
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3. Electroreduction of CO 2 on Single‐Site Copper‐Nitrogen‐Doped Carbon Material: Selective Formation of Ethanol and Reversible Restructuration of the Metal Sites

Author

Karapinar, Dilan, primary, Huan, Ngoc Tran, additional, Ranjbar Sahraie, Nastaran, additional, Li, Jingkun, additional, Wakerley, David, additional, Touati, Nadia, additional, Zanna, Sandrine, additional, Taverna, Dario, additional, Galvão Tizei, Luiz Henrique, additional, Zitolo, Andrea, additional, Jaouen, Frédéric, additional, Mougel, Victor, additional, and Fontecave, Marc, additional

Published
2019
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5. Electroreduction of CO2 on Single‐Site Copper‐Nitrogen‐Doped Carbon Material: Selective Formation of Ethanol and Reversible Restructuration of the Metal Sites.

Author

Karapinar, Dilan, Huan, Ngoc Tran, Ranjbar Sahraie, Nastaran, Li, Jingkun, Wakerley, David, Touati, Nadia, Zanna, Sandrine, Taverna, Dario, Galvão Tizei, Luiz Henrique, Zitolo, Andrea, Jaouen, Frédéric, Mougel, Victor, and Fontecave, Marc

Subjects
ELECTROLYTIC reduction, METALS, COPPER surfaces, PYROLYTIC graphite, METALLIC surfaces, ETHANOL, VINYL acetate
Abstract

It is generally believed that CO2 electroreduction to multi‐carbon products such as ethanol or ethylene may be catalyzed with significant yield only on metallic copper surfaces, implying large ensembles of copper atoms. Here, we report on an inexpensive Cu‐N‐C material prepared via a simple pyrolytic route that exclusively feature single copper atoms with a CuN4 coordination environment, atomically dispersed in a nitrogen‐doped conductive carbon matrix. This material achieves aqueous CO2 electroreduction to ethanol at a Faradaic yield of 55 % under optimized conditions (electrolyte: 0.1 m CsHCO3, potential: −1.2 V vs. RHE and gas‐phase recycling set up), as well as CO electroreduction to C2‐products (ethanol and ethylene) with a Faradaic yield of 80 %. During electrolysis the isolated sites transiently convert into metallic copper nanoparticles, as shown by operando XAS analysis, which are likely to be the catalytically active species. Remarkably, this process is reversible and the initial material is recovered intact after electrolysis. [ABSTRACT FROM AUTHOR]

Published
2019
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