Nanostructured, Targeted Layered Metal Oxides as Active and Selective Heterogeneous Electrocatalysts for Oxygen Evolution
Oxygen evolution reaction (OER) is an important chemical transformation that governs the performance of technologically relevant energy conversion and storage processes, such as electrochemical water splitting in electrolyzers and metal-air batteries. This reaction involves the evolution of oxygen gas from (i) oxygen ions formed from water splitting at high temperatures, (ii) oxygen containing species (i.e., OH, OOH) formed from water splitting at low temperatures, and (iii) metal-oxide discharge products (MxO2) in metal-air batteries. One of the main challenges with OER is that it is catalyzed at low temperatures by noble metal-based electrocatalysts, which are expensive (making this process economically unviable), or at high temperatures by metal-oxide based electrocatalysts that are inefficient and lead to high overpotential losses. Our preliminary results, as well as other results in the literature, show that non-noble metal-based oxide electrocatalysts with layered structures, known as nickelate oxides, exhibit promising OER activity. Nickelate oxides (A2MO4+δ) belong to the Ruddlesden-Popper series composed of alternating perovskite-like and rocksalt-like layers. They are promising OER electrocatalysts due to their high oxygen transport/exchange properties compared to the state-of-the-art perovskite-type oxides. Unfortunately, these materials are fairly unexplored and little is known about the properties that govern their OER activity. Our preliminary studies, where we combine density functional theory (DFT) calculations, selective synthesis and characterization, show that engineering their nanocrystalline structure can significantly impact their catalytic activity.
- Research Organization:
- Wayne State Univ., Detroit, MI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- DOE Contract Number:
- SC0014347
- OSTI ID:
- 1763600
- Report Number(s):
- DE-SC0014347
- Resource Relation:
- Related Information: Gu X-K, Samira, S, Camayang J. C. A., Nikolla E.*, “Modulating Catalytic Properties of Targeted Metal Cationic Centers in Non-Stochiometric Mixed Metal Oxides for Oxygen Electrocatalysis”, submitted, 2021.• Gu X-K, Camayang J. C. A., Samira, S, Nikolla E.*, “Oxygen evolution electrocatalysis using mixed metal oxides under acidic conditions: Challenges and opportunities”, J. of Catalysis, 388, 130-140, 2020.• Carneiro J., Williams J., Gryko A., Herrera L. P., Nikolla E.*, "A viewpoint on controlled synthesis of high surface area non-stoichiometric mixed metal oxides for electrocatalysis", ACS Catalysis, 10, 1, 516-527, 2020.• Samira, S, Gu X-K, Nikolla E*, “Design Strategies for Efficient Oxygen Reduction on Non-stoichiometric Mixed Metal Oxides”, ACS Catal., 9, 11, 10575, 2019.• Samira S, Deshpande S, Roberts C. A., Nacy A. M., Kubal J., Matesić K., Oesterling O, Greeley J., Nikolla E*, “Tailoring Catalysis at Solid-Solid Interfaces using Nonprecious Mixed-Metal Oxides for Energy Storage”, Chem. Mater., 31 (18), 7300-7310, 2019.• Gu X., Samira S., Nikolla E.*, “Oxygen Sponges for Electrocatalysis: Oxygen Reduction/Evolution on Non-stoichiometric, Mixed Metal Oxides”, “Up and Coming” Series for the Journal of Chemistry of Materials – Featured on the Cover of the Journal, 2018, 30 (9), pp 2860–2872.• Gu X., Carneiro J., Samira S., Das A., Ariyasingha N., Nikolla E.*, “Efficient Oxygen Electrocatalysis By Nanostructured Mixed Metal Oxides”, J. of Amer. Chem. Soc, 140 (26), 8128–8137, 2018.• Gu X., Nacy A., Camayang J. C. A., Samira S., Diaz M., Meira S., Nikolla E., “Nanostructured, Non-Precious Mixed Metal Oxides as Electrocatalysts for Oxygen Reduction”, J. of Electroanalytical Chem., 833, 490-497, 2019.• Gu X., Nikolla E.*, “Design of Ruddlesden–Popper Oxides with Optimal Surface Oxygen Exchange Properties for Oxygen Reduction and Evolution”, ACS Catalysis, 2017, 7 (9), pp 5912–5920.• Das A., Xhafa E., Nikolla E.*, “Electro- and Thermal-Catalysis by Layered, First Series Ruddlesden - Popper Oxides”, Catal. Today Special Issue on “Catalysis by Mixed Oxides”, 277 (2), 214, 2016.
- Country of Publication:
- United States
- Language:
- English
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