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Efficient Screening of Bi-Metallic Electrocatalysts for Glycerol Valorization
Stockholm University, Faculty of Science, Department of Physics. SLAC National Accelerator Laboratory, United States of America.ORCID iD: 0000-0002-8871-3368
Stockholm University, Faculty of Science, Department of Physics.ORCID iD: 0000-0002-3964-2807
Stockholm University, Faculty of Science, Department of Physics.
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Number of Authors: 82021 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 398, article id 139283Article in journal (Refereed) Published
Abstract [en]

Glycerol is a byproduct of biodiesel production and, as such, it is of limited economic value. By means of electrooxidation, glycerol can be used as a feedstock for scalable hydrogen production, in addition to conversion to value-added products. The development of novel and efficient catalytic electrode materials for the anodic side of the reaction is a key towards a hydrogen-based energy economy. In the present study, a computational screening protocol combining DFT, scaling relations, and microkinetic modeling allows for a rational selection of novel catalysts that can deliver efficient glycerol electrooxidation, low cost of production, and environmental sustainability. Activity and chemical selectivity towards hydrogen production on pure metal catalysts is discussed in terms of volcano-shaped plots. We find that the selectivity in the glycerol oxidation reaction is influenced by a different energy landscape when in the presence of water and best classified by a comparison of O-H and C-H bond-breaking barriers. In addition, we screened 3570 bi-metallic catalysts in the AB (L1(0)) and A(3)B (L1(2)) ordered structures for activity, stability, price, and toxicity. By filtering based on the criteria for toxicity, resistance to oxidation, miscibility, and price, we have identified 5 L1(0) structured catalysts (AgPd, AuPd, PtSb, CuPt, and AgPt) and 20 L1(2) catalysts (Ga3Ta, In3Ta, Ir3W, Ir3Mo, Cu3Pt, Ir3Ta, Ir3Re, Pd3Bi, Pd3Cu, Pd3W, Pd3Co, Pd3Sn, Pd3Mo, Pd3Ag, Pd3Ga, Pd3Ta, Au3Ru, Pd3In, Au3Ir, and Pd3Au) that are all predicted to show high activity. We also identify an additional 37 L1(0) and 92 L1(2) structured electrocatalysts with an anticipated medium-high activity.

Place, publisher, year, edition, pages
2021. Vol. 398, article id 139283
Keywords [en]
Biodiesel Industry, Glycerol Eletrochemical Valorization, Microkinetic Modeling, Computational Screening Method, Bi-metallic electrodes
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:su:diva-198623DOI: 10.1016/j.electacta.2021.139283ISI: 000709767900012OAI: oai:DiVA.org:su-198623DiVA, id: diva2:1611399
Available from: 2021-11-15 Created: 2021-11-15 Last updated: 2021-11-16Bibliographically approved

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Campos dos Santos, EgonBarros Neves de Araujo, RafaelValter, MikaelJohnsson, MatsPettersson, Lars Gunnar Moody

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Campos dos Santos, EgonBarros Neves de Araujo, RafaelValter, MikaelJohnsson, MatsPettersson, Lars Gunnar Moody
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