2020
DOI: 10.1038/s41929-020-00505-w
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Self-activation of copper electrodes during CO electro-oxidation in alkaline electrolyte

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Cited by 88 publications
(77 citation statements)
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“…These advances are a prerequisite for the design of efficient electrode materials and interfaces, which allow the transformation of chemical into electric energy or vice versa and the synthesis of valuable chemicals. 1 Understanding the electrochemical Cu/liquid interface is of special interest, since Cu has been shown to not only efficiently electro-oxidize CO in alkaline media at low overpotentials through self-activation by the formation of high-energy undercoordinated Cu adatom structures, as we could show recently, 2 but also reduce CO 2 and CO to valuable hydrocarbons and alcohols with reasonable Faradaic efficiencies. 3 This means that Cu is particularly intriguing in terms of its ability to act as a bidirectional electrocatalyst.…”
Section: Introductionmentioning
confidence: 95%
“…These advances are a prerequisite for the design of efficient electrode materials and interfaces, which allow the transformation of chemical into electric energy or vice versa and the synthesis of valuable chemicals. 1 Understanding the electrochemical Cu/liquid interface is of special interest, since Cu has been shown to not only efficiently electro-oxidize CO in alkaline media at low overpotentials through self-activation by the formation of high-energy undercoordinated Cu adatom structures, as we could show recently, 2 but also reduce CO 2 and CO to valuable hydrocarbons and alcohols with reasonable Faradaic efficiencies. 3 This means that Cu is particularly intriguing in terms of its ability to act as a bidirectional electrocatalyst.…”
Section: Introductionmentioning
confidence: 95%
“…Recently, an effective design strategy of simply increasing the roughness factor (RF) of catalysts has been reported to improve the selectivity of CORR in experiments [23–27] . However, both the electrochemical‐active‐surface‐area (ECSA) normalized CORR rate and the local pH near the electrode surface were found to keep nearly constant with increasing RF.…”
Section: Figurementioning
confidence: 99%
“…[1,16,[20][21][22] Recently, an effective design strategy of simply increasing the roughness factor (RF) of catalysts has been reported to improve the selectivity of CORR in experiments. [23][24][25][26][27] However, both the electrochemical-active-surface-area (ECSA) normalized CORR rate and the local pH near the electrode surface were found to keep nearly constant with increasing RF. The failure of both CORR-activity-promoting and local-pH-elevating mechanisms implies a new mechanism underlying the RF-enhanced CORR selectivity.…”
mentioning
confidence: 99%
“…Um ein makroskopisches Bild der elektrokatalytischen Aktivität zu gewinnen, haben wir Cyclovoltammetrie an Cu(111)‐Einkristallen, die ein atomar perfekt geordnetes Modellsystem darstellen, in mit CO gesättigter alkalischer Lösung durchgeführt [1]. Hierbei wird an die Arbeitselektrode in einem Elektrolyten erst ein linear ansteigendes oder abfallendes und anschließend ein rückläufiges Potential angelegt.…”
Section: Abbunclassified
“…Um bestätigen zu können, dass die im Experiment beobachtbare hohe Aktivität von der erwarteten Verringerung der Bindungsstärke von CO an Cu im Vergleich zu Pt herrührt, haben wir mikrokinetische Modellberechnungen durchgeführt [1]. Abbildung 2 zeigt den berechneten Vulcano‐Plot, in dem für Cu(111) keine katalytische Aktivität gefunden wird, da die Oberfläche durch ihre starke Affinität zu Sauerstoff mit adsorbierten Hydroxid‐Ionen vergiftet ist, während das CO zu schwach bindet.…”
Section: Abbunclassified