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• W2093202328 abstract "Electrochemical reduction of CO2 to formate (HCO2(-)) powered by renewable electricity is a possible carbon-negative alternative to synthesizing formate from fossil fuels. This process is energetically inefficient because >1 V of overpotential is required for CO2 reduction to HCO2(-) on the metals currently used as cathodic catalysts. Pd reduces CO2 to HCO2(-) with no overpotential, but this activity has previously been limited to low synthesis rates and plagued by an unidentified deactivation pathway. Here we show that Pd nanoparticles dispersed on a carbon support reach high mass activities (50-80 mA HCO2(-) synthesis per mg Pd) when driven by less than 200 mV of overpotential in aqueous bicarbonate solutions. Electrokinetic measurements are consistent with a mechanism in which the rate-determining step is the addition of electrochemically generated surface adsorbed hydrogen to CO2 (i.e., electrohydrogenation). The electrodes deactivate over the course of several hours because of a minor pathway that forms CO. Activity is recovered, however, by removing CO with brief air exposure." @default.
• W2093202328 created "2016-06-24" @default.
• W2093202328 creator A5025223034 @default.
• W2093202328 creator A5066579298 @default.
• W2093202328 date "2015-04-06" @default.
• W2093202328 modified "2023-10-10" @default.
• W2093202328 title "Pd-Catalyzed Electrohydrogenation of Carbon Dioxide to Formate: High Mass Activity at Low Overpotential and Identification of the Deactivation Pathway" @default.
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• W2093202328 doi "https://doi.org/10.1021/ja511890h" @default.
• W2093202328 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25812119" @default.
• W2093202328 hasPublicationYear "2015" @default.
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