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

Title: High–performance water electrolyzer with minimum platinum group metal usage: Iron nitride–iridium oxide core–shell nanostructures for stable and efficient oxygen evolution reaction

Journal Article · · Applied Catalysis. B, Environmental

In this study, to reduce the usage of rare-earth metals in a proton-exchange-membrane water electrolyzer (PEMWE), a highly active water-oxidizing anode based on a core–shell catalyst structure was developed. Earth-abundant metal-based iron-nitride nanostructure was adopted to support thin, electrodeposited iridium-oxide films. PEMWEs with core–shell nanostructure has substantially low ohmic and mass-transfer resistances, suggesting that the introduction of Fe2N nanostructure on Ti PTL enhances the transfer of protons, water, and oxygen on the catalyst layer. Furthermore, a high Ir mass activity of 103 A/mgIr was achieved with reduced Ir loading of 0.036 mg/cm2 on the Ti PTL. The well-known weakness of transition-metal nitrides (TMNs) for use in PEMWEs, that is, their chemical instability in corrosive acidic environments, was overcome by carefully passivating the surfaces of the TMNs with chemically stable Ir catalyst layers. As a result, the prepared core–shell-structured catalysts were stable under the PEMWE operating condition.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); National Research Foundation of Korea (NRF)
Grant/Contract Number:
AC52-07NA27344; NRF-2021M3D1A2051389
OSTI ID:
2202495
Alternate ID(s):
OSTI ID: 1999844; OSTI ID: 2007613
Report Number(s):
LLNL-JRNL-842133; S0926337323002394; 122596; PII: S0926337323002394
Journal Information:
Applied Catalysis. B, Environmental, Journal Name: Applied Catalysis. B, Environmental Vol. 330 Journal Issue: C; ISSN 0926-3373
Publisher:
ElsevierCopyright Statement
Country of Publication:
Netherlands
Language:
English

References (47)

Enhancement of the oxygen reduction on nitride stabilized pt-M (M=Fe, Co, and Ni) core–shell nanoparticle electrocatalysts journal April 2015
Formation and Decomposition of Iron Nitrides Observed by in situ Powder Neutron Diffraction and Thermal Analysis: Formation and Decomposition of Iron Nitrides journal February 2014
Electrochemically deposited iridium-oxide: Estimation of intrinsic activity and stability in oxygen evolution in acid solution journal January 2021
The electronic structure of iridium and its oxides: The electronic structure of iridium and its oxides journal December 2015
Polymer Electrolyte Water Electrolysis: Correlating Performance and Porous Transport Layer Structure: Part II. Electrochemical Performance Analysis journal January 2019
Self-Assembly in Nafion Membranes upon Hydration: Water Mobility and Adsorption Isotherms journal September 2014
Structural investigations of iron oxynitride multilayered films obtained by reactive gas pulsing process journal June 2015
Electrical resistivity and microstructural evolution of electrodeposited Co and Co-W nanowires journal August 2020
Discovery of true electrochemical reactions for ultrahigh catalyst mass activity in water splitting journal November 2016
A three-dimensional hierarchical Fe2O3@NiO core/shell nanorod array on carbon cloth: a new class of anode for high-performance lithium-ion batteries journal January 2013
Introducing a novel technique for measuring hydrogen crossover in membrane-based electrochemical cells journal April 2021
Constructing a Multifunctional Interface between Membrane and Porous Transport Layer for Water Electrolyzers journal April 2021
Electrodeposited IrO2/Ti electrodes as durable and cost-effective anodes in high-temperature polymer-membrane-electrolyte water electrolyzers journal June 2018
Conductive nitrides: Growth principles, optical and electronic properties, and their perspectives in photonics and plasmonics journal January 2018
Essentials of High Performance Water Electrolyzers – From Catalyst Layer Materials to Electrode Engineering journal October 2021
Nitride Stabilized PtNi Core–Shell Nanocatalyst for high Oxygen Reduction Activity journal February 2012
Measurement of the Protonic and Electronic Conductivities of PEM Water Electrolyzer Electrodes journal October 2020
Analysis of XPS spectra of Fe2+ and Fe3+ ions in oxide materials journal February 2008
Hydrogen as energy carrier: Techno-economic assessment of decentralized hydrogen production in Germany journal November 2021
Development of electrodeposited IrO2 electrodes as anodes in polymer electrolyte membrane water electrolysis journal December 2015
Molecular Dynamics Simulation of Microstructure and Molecular Mobilities in Swollen Nafion Membranes journal October 2001
Anodically Electrodeposited Iridium Oxide Films (AEIROF) from Alkaline Solutions for Electrochromic Display Devices journal April 1989
Electronic Structure and Growth of Electrochemically Formed Iridium Oxide Films journal January 2017
PEM Electrolysis, a Forerunner for Clean Hydrogen journal December 2021
Electrical resistivity of titanium in the temperature range from 290 to 1800 K journal December 2007
Comprehensive investigation of novel pore-graded gas diffusion layers for high-performance and cost-effective proton exchange membrane electrolyzers journal January 2017
Low-loading IrO2 supported on Pt for catalysis of PEM water electrolysis and regenerative fuel cells journal September 2020
From Catalyst Coated Membranes to Porous Transport Electrode Based Configurations in PEM Water Electrolyzers journal January 2019
A performance and degradation study of Nafion 212 membrane for proton exchange membrane fuel cells journal September 2009
Core–shell nanoparticles: synthesis and applications in catalysis and electrocatalysis journal January 2015
Reducing Iridium Loading in Oxygen Evolution Reaction Electrocatalysts Using Core–Shell Particles with Nitride Cores journal January 2018
Remarkably high activity of electrodeposited IrO2 film for electrocatalytic water oxidation journal May 2005
Considerations for the scaling-up of water splitting catalysts journal May 2019
Hydrogen-Mediated Thin Pt Layer Formation on Ni3N Nanoparticles for the Oxygen Reduction Reaction journal May 2021
An iron oxide photoanode with hierarchical nanostructure for efficient water oxidation journal January 2014
XPS characterization of surface layers of stainless steel nitrided in electron beam plasma at low temperature journal March 2020
Towards reliable X-ray photoelectron spectroscopy: Sputter-damage effects in transition metal borides, carbides, nitrides, and oxides journal March 2021
Involvement of nanoparticles in the electrodeposition of hydrous iridium oxide films journal April 2012
Investigation of multiplet splitting of Fe 2p XPS spectra and bonding in iron compounds journal January 2004
Is iridium demand a potential bottleneck in the realization of large-scale PEM water electrolysis? journal July 2021
Current status of water electrolysis for energy storage, grid balancing and sector coupling via power-to-gas and power-to-liquids: A review journal February 2018
Low-Temperature Nitridation of Fe3O4 by Reaction with NaNH2 journal January 2021
Electrolyzer Durability at Low Catalyst Loading and with Dynamic Operation journal January 2019
A comprehensive review on PEM water electrolysis journal April 2013
Improved Electrodeposited Iridium Oxide pH Sensor Fabricated on Etched Titanium Substrates journal February 2003
Recent progress of transition metal nitrides for efficient electrocatalytic water splitting journal January 2019
Durable Membrane Electrode Assemblies for Proton Exchange Membrane Electrolyzer Systems Operating at High Current Densities journal August 2016