Membrane Electrolyzers for Impure-Water Splitting

Lindquist, Grace; Xu, Qiucheng; Oener, Sebastian Z.; Boettcher, Shannon W.

doi:10.1016/j.joule.2020.09.020

Cited by 115 publications

(98 citation statements)

References 79 publications

(118 reference statements)

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Section: Resultsmentioning

confidence: 99%

“…Membrane and ionomer degradation are complex processes that are still not fully understood, and there are potentially multiple different degradation pathways contributing. 41 The stability tests were purposefully conducted at conditions that can be easily reproduced by other groups. To begin understanding the source of degradation of the PiperION system, after conditioning and operation in pure water, we then flowed 1 M KOH to the anode and cathode and observed the change in voltage (Figure S8).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Performance and Durability of Pure-Water-Fed Anion Exchange Membrane Electrolyzers Using Baseline Materials and Operation

Lindquist

Oener

Krivina

et al. 2021

ACS Appl. Mater. Interfaces

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102

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Water electrolysis powered by renewable electricity produces green hydrogen and oxygen gas, which can be used for energy, fertilizer, and industrial applications and thus displace fossil fuels. Pure-water anion-exchange-membrane (AEM) electrolyzers in principle offer the advantages of commercialized proton-exchange-membrane systems (high current density, low cross over, output gas compression, etc.) while enabling the use of less-expensive steel components and nonprecious metal catalysts. AEM electrolyzer research and development, however, has been limited by the lack of broadly accessible materials that provide consistent cell performance, making it difficult to compare results across studies. Further, even when the same materials are used, different pretreatments and electrochemical analysis techniques can produce different results. Here, we report an AEM electrolyzer comprising commercially available catalysts, membrane, ionomer, and gas-diffusion layers operating near 1.9 V at 1 A cm–2 in pure water. After the initial break in, the performance degraded by 0.67 mV h–1 at 0.5 A cm–2 at 55 °C. We detail the key preparation, assembly, and operation techniques employed and show further performance improvements using advanced materials as a proof-of-concept for future AEM-electrolyzer development. The data thus provide an easily reproducible and comparatively high-performance baseline that can be used by other laboratories to calibrate the performance of improved cell components, nonprecious metal oxygen evolution, and hydrogen evolution catalysts and learn how to mitigate degradation pathways.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Performance and Durability of Pure-Water-Fed Anion Exchange Membrane Electrolyzers Using Baseline Materials and Operation

Lindquist

Oener

Krivina

et al. 2021

ACS Appl. Mater. Interfaces

Self Cite

102

View full text Add to dashboard Cite

show abstract

“…A critical bottleneck in application of water electrolysis and metal-air batteries as promising clean energy conversion and storage technologies, [1][2][3][4] is the sluggish oxygen evolution reaction (OER) on the anode, [5][6][7][8][9][10][11][12] which typically requires high-cost and scarce noble metal-based electrocatalysts such as iridium and ruthenium oxides. 13,14 In the past decade, a wide range of earth-abundant transition-metal compounds including oxide perovskites, 15 metal oxyhydroxides, 16 amorphous metal oxyhydroxides, 17 and molecular complexes, 18 have been developed as candidate OER electrocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional CoOOH nanoframes confining high-density Mo single atoms for large-current-density oxygen evolution

Tang

Song

et al. 2022

J. Mater. Chem. A

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“…The anion exchange membrane (AEM) is a key component of the cell [10,33]. Its main function is the transport of hydroxyl ions from cathode to anode.…”

Section: Anion Exchange Membranesmentioning

confidence: 99%

Recent Advances in Alkaline Exchange Membrane Water Electrolysis and Electrode Manufacturing

et al. 2021

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Water electrolysis to obtain hydrogen in combination with intermittent renewable energy resources is an emerging sustainable alternative to fossil fuels. Among the available electrolyzer technologies, anion exchange membrane water electrolysis (AEMWE) has been paid much attention because of its advantageous behavior compared to other more traditional approaches such as solid oxide electrolyzer cells, and alkaline or proton exchange membrane water electrolyzers. Recently, very promising results have been obtained in the AEMWE technology. This review paper is focused on recent advances in membrane electrode assembly components, paying particular attention to the preparation methods for catalyst coated on gas diffusion layers, which has not been previously reported in the literature for this type of electrolyzers. The most successful methodologies utilized for the preparation of catalysts, including co-precipitation, electrodeposition, sol–gel, hydrothermal, chemical vapor deposition, atomic layer deposition, ion beam sputtering, and magnetron sputtering deposition techniques, have been detailed. Besides a description of these procedures, in this review, we also present a critical appraisal of the efficiency of the water electrolysis carried out with cells fitted with electrodes prepared with these procedures. Based on this analysis, a critical comparison of cell performance is carried out, and future prospects and expected developments of the AEMWE are discussed.

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Membrane Electrolyzers for Impure-Water Splitting

Cited by 115 publications

References 79 publications

Performance and Durability of Pure-Water-Fed Anion Exchange Membrane Electrolyzers Using Baseline Materials and Operation

Performance and Durability of Pure-Water-Fed Anion Exchange Membrane Electrolyzers Using Baseline Materials and Operation

Three-dimensional CoOOH nanoframes confining high-density Mo single atoms for large-current-density oxygen evolution

Recent Advances in Alkaline Exchange Membrane Water Electrolysis and Electrode Manufacturing

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