Bimetallic Intersection in PdFe@FeO x ‐C Nanomaterial for Enhanced Water Splitting Electrocatalysis

Autor: Jordan Martinez, Jaime Mazarío, José Luis Olloqui‐Sariego, Juan José Calvente, Mohanad D. Darawsheh, Guillermo Mínguez‐Espallargas, Marcelo E. Domine, Pascual Oña‐Burgos
Přispěvatelé: Ministerio de Ciencia e Innovación (España), Junta de Andalucía, Universidad de Sevilla. Departamento de Química Física, Gobierno de España, Ministerio de Ciencia e Innovación (MICIN). España, Generalitat Valenciana
Rok vydání: 2022
Předmět:
Zdroj: Martínez, Jordan Mazarío, Jaime Olloqui-Sariego, J. L. Calvente, Juan José Darawsheh, Mohanad D. Mínguez Espallargas, Guillermo Domine, Marcelo E. Oña-Burgos, Pascual 2022 Bimetallic Intersection in PdFe@FeOx-C Nanomaterial for Enhanced Water Splitting Electrocatalysis Advanced Sustainable Systems 6 7 2200096
ISSN: 2366-7486
Popis: Supported Fe-doped Pd-nanoparticles (NPs) are prepared via soft transformation of a PdFe-metal oraganic framework (MOF). The thus synthesized bimetallic PdFe-NPs are supported on FeO@C layers, which are essential for developing well-defined and distributed small NPs, 2.3 nm with 35% metal loading. They are used as bifunctional nanocatalysts for the electrocatalytic water splitting process. They display superior mass activity for the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER), both in alkaline and acid media, compared with those obtained for benchmarking platinum HER catalyst, and ruthenium, and iridium oxide OER catalysts. PdFe-NPs also exhibit outstanding stability against sintering that can be explained by the protecting role of graphitic carbon layers provided by the organic linker of the MOF. Additionally, the superior electrocatalytic performance of the bimetallic PdFe-NPs compared with those of monometallic Pd/C NPs and FeO points to a synergetic effect induced by Fe–Pd interactions that facilitates the water splitting reaction. This is supported by additional characterization of the PdFe-NPs prior and post electrolysis by TEM, XRD, X-ray photoelectron spectroscopy, and Raman revealing that dispersed PdFe NPs on FeO@C promote interactions between Pd and Fe, most likely to be Pd–O–Fe active centers.
The authors thank the financial support by the Spanish Government (RTI2018-096399-A-I00). This work has been supported by grants PID2020-117177GB-I00 and CEX2019-000919-M, funded by MCIN/AEI/10.13039/501100011033, Junta de Andalucía (P20_01027 and PYC 20 RE 060 UAL), and the Generalitat Valenciana (PROMETEU2019/066). J. Mazarío thanks the MICINN (CTQ2015-67592) for his Ph.D. scholarship. The authors thank CITIUS-Universidad de Sevilla for providing XPS measurements.
Databáze: OpenAIRE
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