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Different promoting roles of ruthenium for the oxidation of primary and secondary alcohols on PtRu electrocatalysts
(Elsevier, 2021-06-17)
This study shows remarkably different features between the oxidation of secondary and primary C3-C5 alcohols. The oxidation of primary alcohols is controlled by the oxidative removal of blocking adsorbates, such as CO, ...
Toward Efficient Tandem Electroreduction of CO2 to Methanol using Anodised Titanium
(ACS, 2021-06-28)
The electroreduction of CO2 (CO2RR) using renewable electricity is an appealing route to synthesize methanol (CH3OH), a valuable C1 feedstock and fuel. Unfortunately, there are still no workhorse electrocatalysts with ...
Theory-guided enhancement of CO2 reduction to ethanol on Ag-Cu tandem catalysts via particle-size effects
(ACS, 2021-10-18)
In the CO2 reduction reaction, the design of electrocatalysts that selectively promote alcohols over hydrocarbons (e.g., ethanol over ethylene) hinges on the understanding of the pathways and specific sites that forms ...
Selectivity Map for the Late Stages of CO and CO2 Reduction to C2 Species on Cu Electrodes
(Wiley, 2021-02-01)
The electrochemical CO and CO2 reduction reactions (CORR and CO2RR) using copper catalysts and renewable electricity hold promise as a carbon-neutral route to produce commodity chemicals and fuels. However, the exact ...
Elucidating the Structure of Ethanol-Producing Active Sites at Oxide-Derived Cu Electrocatalysts
(ACS, 2020-08-21)
The discovery of oxide-derived copper catalysts for CO2 electroreduction is an outstanding advance in the field of electrocatalysis. Their low overpotentials and improved selectivity towards C2 products make them unique. ...
Structure dependency of the atomic-scale mechanisms of platinum electro-oxidation and dissolution
(Springer Nature, 2020-08-24)
Platinum dissolution and restructuring due to surface oxidation are primary degradation mechanisms that limit the lifetime of Pt-based electrocatalysts for electrochemical energy conversion. Here, we studied well-defined ...
Designing water splitting catalysts using rules of thumb: advantages, dangers and alternatives
(RSC, 2020-03-09)
Thermodynamic analysis of the oxygen evolution reaction (OER) hints toward an intrinsic overpotential caused by the nonoptimal adsorption-energy scaling relation between OH and OOH. Consequently, nowadays it is a widely ...
Elucidating the Facet-dependent Selectivity for CO2 Electroreduction to Ethanol of Cu-Ag Tandem Catalysts
(ACS, 2021-04-07)
Despite being desirable high-value products of the electrochemical CO2 reduction reaction (CO2RR), alcohols are still obtained with lower selectivity compared to hydrocarbons and the reaction pathways leading to their ...
How symmetry factors cause potential- and facet-dependent pathway shifts during CO2 reduction to CH4 on Cu electrodes
(Elsevier, 2020-12-28)
The deactivation of copper electrodes is a serious problem that can affect the scalability and deployment of CO2 electrolyzers. The effect is generally attributed to the cathodic deposition of Fe and Zn impurities from the ...
Monitoring Active Sites for Hydrogen Evolution Reaction at Model Carbon Surfaces
(RSC, 2021-03-25)
Carbon is ubiquitous as an electrode material in electrochemical energy conversion devices. If used as support material, the evolution of H2 is undesired on carbon. However, recently carbon-based materials are of high ...