Morphology control of metal-modified zirconium phosphate support structures for the oxygen evolution reaction

Autor:	Daniel E. Del Toro-Pedrosa, Mario V. Ramos-Garcés, Joel Sanchez, Thomas F. Jaramillo, Kálery La Luz-Rivera, Jorge L. Colón
Rok vydání:	2020
Předmět:	Materials science Oxygen evolution chemistry.chemical_element Electrochemistry Catalysis Inorganic Chemistry Metal Nickel chemistry.chemical_compound Chemical engineering Transition metal chemistry Zirconium phosphate visual_art visual_art.visual_art_medium Cobalt
Zdroj:	Dalton Transactions. 49:3892-3900
ISSN:	1477-9234 1477-9226
Popis:	The electrochemical oxygen evolution reaction (OER) is the half-cell reaction for many clean-energy production technologies, including water electrolyzers and metal-air batteries. However, its sluggish kinetics hinders the performance of those technologies, impeding them from broader implementation. Recently, we reported the use of zirconium phosphate (ZrP) as a support for transition metal catalysts for the oxygen evolution reaction (OER). These catalysts achieve promising overpotentials with high mass activities. Herein, we synthesize ZrP structures with controlled morphology: hexagonal platelets, rods, cubes, and spheres, and subsequently modify them with Co(ii) and Ni(ii) cations to assess their electrochemcial OER behavior. Through inductively coupled plasma mass-spectrometry measurements, the maximum ion exchange capacity is found to vary based on the morphology of the ZrP structure and cation selection. Trends in geometric current density and mass activity as a function of cation selection are discussed. We find that the loading and coverage of cobalt and nickel species on the ZrP supports are key factors that control OER performance.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ca7416e3d3177fc8c31b44bf830af29 https://doi.org/10.1039/c9dt04135d Zobrazit plný text záznamu