skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Electronic Structure of IrO2: The Role of the Metal d Orbitals

Journal Article · · Journal of Physical Chemistry. C
 [1];  [2];  [3]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Univ. of Chicago, IL (United States)
  3. California Inst. of Technology (CalTech), Pasadena, CA (United States)

IrO2 is one of the most active catalysts for the oxygen evolution reaction (OER) and remains the only known stable OER catalyst in acidic conditions. As a first step in understanding the mechanism for OER we carried out detailed Density Functional Theory (DFT) studies of the electronic structure of IrO2. We compared the electronic states and magnetic properties of IrO2 using several density functionals. We found that DFT with hybrid functionals (B3PW and PBE0) leads to a weak ferromagnetic coupling, although IrO2 has often been reported as nonmagnetic. We also found a magnetic ground state for RuO2, whose electronic structure is similar to that of IrO2. Ru–Ru antiferromagnetic interaction has been observed experimentally in nanoparticle RuO2. Further low temperature measurements are necessary to confirm whether a weak magnetism may occur below 20 K in IrO2. We also found that PBE leads to a better agreement with the experimental XPS spectra, compared with hybrid functionals and PBE+U.

Research Organization:
California Institute of Technology (CalTech), Pasadena, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0004993
OSTI ID:
1467645
Journal Information:
Journal of Physical Chemistry. C, Vol. 119, Issue 21; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 75 works
Citation information provided by
Web of Science

References (38)

Improving O2 production of WO3 photoanodes with IrO2 in acidic aqueous electrolyte journal January 2014
Benchmarking Heterogeneous Electrocatalysts for the Oxygen Evolution Reaction journal October 2013
Dimensionality-Controlled Insulator-Metal Transition and Correlated Metallic State in 5 d Transition Metal Oxides Sr n + 1 Ir n O 3 n + 1 ( n = 1 , 2, and ) journal November 2008
Novel J eff = 1 / 2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr 2 IrO 4 journal August 2008
Charge density wave formation accompanying ferromagnetic ordering in quasi-one-dimensional BaIrO3 journal February 2000
High-temperature weak ferromagnetism on the verge of a metallic state: Impact of dilute Sr doping on BaIrO 3 journal May 2004
Origin of Charge Density Wave Formation in Insulators from a High Resolution Photoemission Study of BaIrO 3 journal June 2005
Anomalous magnetic and transport behavior in the magnetic insulator Sr 3 Ir 2 O 7 journal December 2002
Self-consistent band structure of the rutile dioxides NbO2, RuO2, and IrO2 journal October 1989
Electronic and optical properties of Ru O 2 and Ir O 2 journal April 2006
Understanding the Electronic Structure of IrO 2 Using Hard-X-ray Photoelectron Spectroscopy and Density-Functional Theory journal March 2014
Derivative discontinuity, bandgap and lowest unoccupied molecular orbital in density functional theory journal May 2012
Localization and Delocalization Errors in Density Functional Theory and Implications for Band-Gap Prediction journal April 2008
Density‐functional thermochemistry. III. The role of exact exchange journal April 1993
Toward reliable density functional methods without adjustable parameters: The PBE0 model journal April 1999
Self-consistent hybrid functional for condensed systems journal May 2014
Screened hybrid density functionals applied to solids journal April 2006
Accurate Band Gaps for Semiconductors from Density Functional Theory journal January 2011
Magnetic Susceptibility of IrO 2 and RuO 2 journal June 1970
Pseudopotentials for high-throughput DFT calculations journal January 2014
Ab initio effective core potentials for molecular calculations. Potentials for main group elements Na to Bi journal January 1985
Revised Basis Sets for the LANL Effective Core Potentials journal June 2008
Theoretical and experimental study of non-stoichiometric SrRuO3 : a role of oxygen vacancies in electron correlation effects journal January 2013
Methods of Electronic Structure Theory book January 1977
Phase relations in the systems TiO2-IrO2 and SnO2-IrO2 in air journal March 1967
Anisotropic exchange interactions of spin-orbit-integrated states in Sr 2 IrO 4 journal August 2009
First-principles modeling of localized d states with the G W @ LDA + U approach journal July 2010
Quasiparticle and optical properties of rutile and anatase TiO 2 journal August 2010
Linear response approach to the calculation of the effective interaction parameters in the LDA + U method journal January 2005
The magnetic and electronic structure of vanadyl pyrophosphate from density functional theory journal January 2011
Local spin density functional approach to the theory of exchange interactions in ferromagnetic metals and alloys journal May 1987
A first-principles theory of ferromagnetic phase transitions in metals journal June 1985
First-principles exchange interactions between ferromagnetic and antiferromagnetic films: Co on NiMn, a case study journal June 1998
Electronic structure, exchange interactions, and Curie temperature of FeCo journal April 1999
Electronic Structure of Rutile Oxides TiO 2 , RuO 2 and IrO 2 Studied by X-ray Photoelectron Spectroscopy journal November 1977
Hybrid exchange-correlation energy functionals for strongly correlated electrons: Applications to transition-metal monoxides journal October 2006
Role of Magnetism in Catalysis: RuO 2 (110) Surface journal March 2013
A Cyclic and Polymeric Phosphazene as Solid State Template for the Formation of RuO2 Nanoparticles journal May 2007

Cited By (7)

Atomic Layer Deposited TiO 2 -IrO x Alloy as a Hole Transport Material for Perovskite Solar Cells journal July 2018
A unique oxygen ligand environment facilitates water oxidation in hole-doped IrNiOx core–shell electrocatalysts journal October 2018
Crystal‐Phase‐Engineered PdCu Electrocatalyst for Enhanced Ammonia Synthesis journal January 2020
Crystal‐Phase‐Engineered PdCu Electrocatalyst for Enhanced Ammonia Synthesis journal February 2020
Chiro-Spintronics: Spin-Dependent Electrochemistry and Water Splitting Using Chiral Molecular Films journal February 2018
Stable Surfaces That Bind Too Tightly: Can Range-Separated Hybrids or DFT+U Improve Paradoxical Descriptions of Surface Chemistry? journal August 2019
Control of Electrons’ Spin Eliminates Hydrogen Peroxide Formation During Water Splitting journal February 2017

Similar Records

On the Role of Interfacial Water Dynamics for Electrochemical Stability of RuO 2 and IrO 2
Journal Article · Tue Oct 18 00:00:00 EDT 2022 · ChemCatChem · OSTI ID:1467645

Importance of Surface IrOx in Stabilizing RuO2 for Oxygen Evolution
Journal Article · Wed Oct 18 00:00:00 EDT 2017 · Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry · OSTI ID:1467645

Unveiling the Role of Surface Ir-Oxo Species in O2 Evolution at IrO2 Electrocatalysts via Embedded Cluster Multireference Calculations
Journal Article · Thu Mar 14 00:00:00 EDT 2024 · Journal of Physical Chemistry. C · OSTI ID:1467645