BibTex format
@article{Quintin-Baxendale:2025:10.1021/acsmaterialsau.5c00127,
author = {Quintin-Baxendale, R and Sokolikova, M and Tao, Y and Fisher, E and Goli, N and Bai, H and Murawski, J and Yang, G and Celorrio, V and Liang, C and Rao, RR and Stephens, IEL and Mattevi, C},
doi = {10.1021/acsmaterialsau.5c00127},
journal = {ACS Materials Au},
title = {Crystal-phase engineering of nanowires and platelets of KxIrO2 for efficient water oxidation},
url = {http://dx.doi.org/10.1021/acsmaterialsau.5c00127},
year = {2025}
}
RIS format (EndNote, RefMan)
TY - JOUR
AB - IrO2 is one of the most widely investigated electrocatalysts for oxygen evolution reaction in an acidic environment. Increasing the mass activity is an effective way of decreasing the loading of Ir, to ultimately reduce costs. Here, we demonstrate the crystal-phase engineering of two different potassium iridate polymorphs obtained by designing a selective solid-state synthesis of either one-dimensional K0.25IrO2 nanowires with a hollandite crystal structure or two-dimensional KIrO2 hexagonal platelets. Both structures present increased specific and mass electrocatalytic activities for the water oxidation reaction in acidic media compared to commercial rutile IrO2 of up to 40%, with the 1D nanowires outperforming the 2D platelets. XANES, extended X-ray absorption fine structure, and X-ray diffraction investigations prove the structural stability of these two different allotropes of KxIrO2 compounds upon electrocatalytic testing. These low-dimensional nanostructured 1D and 2D KxIrO2 compounds with superior mass activity to commercial IrO2 can pave the way toward the design of new electrocatalyst architectures with reduced Ir loading content for proton exchange membrane water electrolyzer (PEMWE) anodes.
AU - Quintin-Baxendale,R
AU - Sokolikova,M
AU - Tao,Y
AU - Fisher,E
AU - Goli,N
AU - Bai,H
AU - Murawski,J
AU - Yang,G
AU - Celorrio,V
AU - Liang,C
AU - Rao,RR
AU - Stephens,IEL
AU - Mattevi,C
DO - 10.1021/acsmaterialsau.5c00127
PY - 2025///
SN - 2694-2461
TI - Crystal-phase engineering of nanowires and platelets of KxIrO2 for efficient water oxidation
T2 - ACS Materials Au
UR - http://dx.doi.org/10.1021/acsmaterialsau.5c00127
UR - https://doi.org/10.1021/acsmaterialsau.5c00127
ER -