Diamond Publications - Search Results

Search Again...

These results only include publications that have been reviewed and processed by Diamond Light Source. To also view papers that have not yet been processed click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

One item found (0 items not approved).

Instruments / Technical Area	Publication Details	Published	Actions
B18-Core EXAFS	First example of protonation of Ruddlesden-Popper Sr2IrO4: a route to enhanced water oxidation catalysts Ronghuan Zhang , Paul E. Pearce , Vanessa Pimenta , Jordi Cabana , Haifeng Li , Daniel Alves Dalla Corte , Artem M. Abakumov , Gwenaëlle Rousse , Domitille Giaume , Michael Deschamps , Alexis Grimaud Chemistry Of Materials DOI: 10.1021/acs.chemmater.0c00432 Diamond Proposal Number(s): [12559] Show Abstract ▼ Abstract: Water electrolysis is considered as a promising way to store and convert excess renewable energies into hydrogen, which is of high value for many chemical transformation processes such as the Haber-Bosch process. However, to allow for the wide-spread of the polymer electrolyte membrane water electrolysis (PEMWE) technology, the main challenge lies in the design of robust catalysts for oxygen evolution reaction (OER) under acidic conditions since most of transition metal-based oxides undergo structural degradation under these harsh acidic conditions. To broaden the variety of candidate materials as OER cata-lysts, a cation-exchange synthetic route was recently explored to reach crystalline pronated iridates with unique structural properties and stability. In this work, a new protonated phase H3.6IrO4∙3.7H2O, prepared via Sr2+/H+ cation exchange at room temperature starting from the parent Ruddlesden-Popper Sr2IrO4 phase, is described. This is the first discovery of crystalline protonated iridate forming from a perovskite-like phase, adopting a layered structure with apex-linked IrO6 octahedra. Furthermore, H3.6IrO4∙3.7H2O is found to possess not only an enhanced specific catalytic activity, superior to that of other perov-skite-based iridates, but also a mass activity comparable to that of nanosized IrOx particles, while showing an improved catalytic stability owing to its ability to reversibly exchange protons in acid.	Mar 2020

Instruments / Technical Area

Publication Details

Published

Actions

B18-Core EXAFS

First example of protonation of Ruddlesden-Popper Sr2IrO4: a route to enhanced water oxidation catalysts