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Title: Rationalizing Acidic Oxygen Evolution Reaction over IrO 2 : Essential Role of Hydronium Cation

Journal Article · · Angewandte Chemie
 [1];  [2];  [2]; ORCiD logo [3];  [1]
  1. Chemistry Division Brookhaven National Laboratory 11973 Upton NY USA
  2. Department of Chemical Engineering Columbia University 10027 New York NY USA
  3. Chemistry Division Brookhaven National Laboratory 11973 Upton NY USA, Department of Chemical Engineering Columbia University 10027 New York NY USA

Abstract The development of active, stable, and more affordable electrocatalysts for acidic oxygen evolution reaction (OER) is of great importance for the practical application of electrolyzers and the advancement of renewable energy conversion technologies. Currently, IrO 2 is the only catalyst with high stability and activity, but a high cost. Further optimization of the catalyst is limited by the lack of understanding of catalytic behaviors at the acid‐IrO 2 interface. Here, in strong interaction with the experiment, we develop an explicit model based on grand‐canonical density function theory (GC‐DFT) calculations to describe acidic OER over IrO 2 . Compared to the explicit models reported previously, hydronium cations (H 3 O + ) are introduced at the electrochemical interface in the current model. As a result, a variation in stable IrO 2 surface configuration under the OER operating condition from previously proposed complete *O‐coverage to a mixture coverage of *OH and *O is revealed, which is well supported by in situ Raman measurements. In addition, the accuracy of predicted overpotential is increased in comparison with the experimentally measured. More importantly, an alteration of the potential limiting step from previously identified *O→*OOH to *OH→*O is observed, which opens new opportunities to advance the IrO 2 ‐based catalysts for acidic OER.

Sponsoring Organization:
USDOE
OSTI ID:
2514496
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 48 Vol. 136; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (45)

Kinetics of the Anode Processes in PEM Fuel Cells - The Promoting Effect of Ru in PtRu Anodes journal December 2001
Recent Progress in Electrocatalysts for Acidic Water Oxidation journal April 2020
Universality in Oxygen Evolution Electrocatalysis on Oxide Surfaces journal March 2011
Epitaxial Core‐Shell Oxide Nanoparticles: First‐Principles Evidence for Increased Activity and Stability of Rutile Catalysts for Acidic Oxygen Evolution journal April 2022
Effects of metal ion on the water structure studied by the Raman OH stretching spectrum journal March 2009
High resolution infrared spectra of water vapor journal January 1969
Toward a stable and active catalyst for proton-exchange membrane water electrolysis journal January 2024
Effects of electrolytes used in roughening gold substrates by oxidation–reduction cycles on surface-enhanced Raman scattering journal December 2005
Mechanistic understanding of pH effects on the oxygen evolution reaction journal February 2022
Electrolysis of water on oxide surfaces journal September 2007
Thermodynamic theory of multi-electron transfer reactions: Implications for electrocatalysis journal September 2011
Stability challenges of electrocatalytic oxygen evolution reaction: From mechanistic understanding to reactor design journal July 2021
New Insights into Electrochemical Ammonia Oxidation on Pt(100) from First Principles journal June 2019
Electric Field Effects in Oxygen Reduction Kinetics: Rationalizing pH Dependence at the Pt(111), Au(111), and Au(100) Electrodes journal June 2020
Acid Electrolyte Anions Adsorption Effects on IrO2 Electrocatalysts for Oxygen Evolution Reaction journal March 2024
Assessing a First-Principles Model of an Electrochemical Interface by Comparison with Experiment journal January 2016
Solvation Effects for Oxygen Evolution Reaction Catalysis on IrO 2 (110) journal May 2017
Ab Initio Thermodynamics of Iridium Surface Oxidation and Oxygen Evolution Reaction journal November 2018
Acid–Base Chemistry of a Model IrO2 Catalytic Interface journal August 2023
Identification of Possible Pathways for C–C Bond Formation during Electrochemical Reduction of CO 2 : New Theoretical Insights from an Improved Electrochemical Model journal April 2016
Fundamental Studies of Planar Single-Crystalline Oxide Model Electrodes (RuO 2 , IrO 2 ) for Acidic Water Splitting journal July 2021
Reducing Iridium Loading in Oxygen Evolution Reaction Electrocatalysts Using Core–Shell Particles with Nitride Cores journal January 2018
Short-Range Ordered Iridium Single Atoms Integrated into Cobalt Oxide Spinel Structure for Highly Efficient Electrocatalytic Water Oxidation journal March 2021
Energetics and Solvation Effects at the Photoanode/Catalyst Interface: Ohmic Contact versus Schottky Barrier journal April 2015
The Reaction Mechanism with Free Energy Barriers at Constant Potentials for the Oxygen Evolution Reaction at the IrO 2 (110) Surface journal December 2016
Influence of Surface Adsorption on the Oxygen Evolution Reaction on IrO 2 (110) journal February 2017
Origin of the Overpotential for Oxygen Reduction at a Fuel-Cell Cathode journal November 2004
Influence of Adsorbed Water on the Oxygen Evolution Reaction on Oxides journal December 2014
Improving the hydrogen oxidation reaction rate by promotion of hydroxyl adsorption journal February 2013
A heavy metal P-type ATPase OsHMA4 prevents copper accumulation in rice grain journal July 2016
Understanding the apparent fractional charge of protons in the aqueous electrochemical double layer journal August 2018
Breaking adsorption-energy scaling limitations of electrocatalytic nitrate reduction on intermetallic CuPd nanocubes by machine-learned insights journal April 2022
Earth-abundant catalysts for electrochemical and photoelectrochemical water splitting journal January 2017
Key role of chemistry versus bias in electrocatalytic oxygen evolution journal November 2020
Decomposition of methyl species on a Ni(211) surface: investigations of the electric field influence journal January 2014
A review on fundamentals for designing oxygen evolution electrocatalysts journal January 2020
How copper catalyzes the electroreduction of carbon dioxide into hydrocarbon fuels journal January 2010
Field emission characteristics of iridium oxide tips journal May 2002
Implicit solvation model for density-functional study of nanocrystal surfaces and reaction pathways journal February 2014
Grand canonical electronic density-functional theory: Algorithms and applications to electrochemistry journal March 2017
Implicit self-consistent electrolyte model in plane-wave density-functional theory journal December 2019
The atomic simulation environment—a Python library for working with atoms journal June 2017
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Improved adsorption energetics within density-functional theory using revised Perdew-Burke-Ernzerhof functionals journal March 1999
How pH affects electrochemical processes journal January 2022

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