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Instruments / Technical Area	Publication Details	Published	Actions
B18-Core EXAFS E01-JEM ARM 200CF	Operando spectroscopy study of the carbon dioxide electro-reduction by iron species on nitrogen-doped carbon Chiara Genovese , Manfred E. Schuster , Emma K. Gibson , Diego Gianolio , Victor Posligua , Ricardo Grau-Crespo , Giannantonio Cibin , Peter Wells , Debi Garai , Vladyslav Solokha , Sandra Krick Calderon , Juan J. Velasco-Velez , Claudio Ampelli , Siglinda Perathoner , Georg Held , Gabriele Centi , Rosa Arrigo Nature Communications 9 DOI: 10.1038/s41467-018-03138-7 Diamond Proposal Number(s): [17031, 10306] Open Access Show Abstract ▼ Abstract: The carbon–carbon coupling via electrochemical reduction of carbon dioxide represents the biggest challenge for using this route as platform for chemicals synthesis. Here we show that nanostructured iron (III) oxyhydroxide on nitrogen-doped carbon enables high Faraday efficiency (97.4%) and selectivity to acetic acid (61%) at very-low potential (−0.5 V vs silver/silver chloride). Using a combination of electron microscopy, operando X-ray spectroscopy techniques and density functional theory simulations, we correlate the activity to acetic acid at this potential to the formation of nitrogen-coordinated iron (II) sites as single atoms or polyatomic species at the interface between iron oxyhydroxide and the nitrogen-doped carbon. The evolution of hydrogen is correlated to the formation of metallic iron and observed as dominant reaction path over iron oxyhydroxide on oxygen-doped carbon in the overall range of negative potential investigated, whereas over iron oxyhydroxide on nitrogen-doped carbon it becomes important only at more negative potentials.	Mar 2018

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B18-Core EXAFS
E01-JEM ARM 200CF

Operando spectroscopy study of the carbon dioxide electro-reduction by iron species on nitrogen-doped carbon