Transition Metal-Modified Exfoliated Zirconium Phosphate as an Electrocatalyst for the Oxygen Evolution Reaction
| Autor: | Eduardo Valle, Thomas F. Jaramillo, Jorge L. Colón, Isabel Barraza Alvarez, Yanyu Wu, Mario V. Ramos-Garcés, Dino Villagrán, Daniel E. Del Toro-Pedrosa, Joel Sanchez |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Tetrabutylammonium hydroxide Oxygen evolution Energy Engineering and Power Technology Nanoparticle Overpotential Electrocatalyst Exfoliation joint Catalysis chemistry.chemical_compound Chemical engineering chemistry Zirconium phosphate Materials Chemistry Electrochemistry Chemical Engineering (miscellaneous) Electrical and Electronic Engineering |
| Zdroj: | ACS Applied Energy Materials. 2:3561-3567 |
| ISSN: | 2574-0962 |
| Popis: | Improved electrochemical oxygen evolution catalysis is crucial for many clean-energy production technologies. Recently, transition-metal-modified zirconium phosphate (ZrP) catalysts were studied for the oxygen evolution reaction (OER) in alkaline media. These studies suggest that the OER occurs preferentially on the surface of the layered ZrP nanoparticles rather than the interlayer gallery. Herein, ZrP nanoparticles are exfoliated with tetrabutylammonium hydroxide (TBA+OH–) to further expose surface sites which are subsequently modified with Co and Ni cations by an ion-exchange reaction. Because of the greater surface accessibility of the exfoliated ZrP support, higher loadings of catalyst material were achieved along with improved site access for catalysis. These new composite materials have improved geometric area normalized overpotentials than metal-adsorbed ZrP nanoparticles without exfoliation. Specifically, Co-modified and Ni-modified exfoliated ZrP show a reduction in overpotential at a current de... |
| Databáze: | OpenAIRE |
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