Ionomer-free nanoporous iridium nanosheet electrodes with boosted performance and catalyst utilization for high-efficiency water electrolyzers

Xie, Zhiqiang; Ding, Lei; Yu, Shule; Wang, Weitian; Capuano, Christopher B.; Keane, Alex; Ayers, Kathy; Cullen, David A.; Meyer, Harry M.; Zhang, Feng-Yuan

doi:10.1016/j.apcatb.2023.123298

Cited by 8 publications

(1 citation statement)

References 45 publications

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“…180 Some literatures are reported as glassy carbon as substrate, but comparatively, their current density and efficiency are low. Except for these two kinds of materials, scientists have tried other types of conductive materials like copper wire, 79 Titanium liquid/gas diffusion layers (TT-LGDLs), 181 cobalt foam, 81 indium−tin-oxide (ITO), 182 Pt/Ti mesh. 62 The choice of substrate for electrocatalysts significantly impacts efficiency and performance in electrochemical reactions, especially in oxygen evolution and hydrogen evolution reactions.…”

Section: Alkaline Electrolytementioning

confidence: 99%

Recent Advances in Electrochemical Water Splitting Electrocatalysts: Categorization by Parameters and Catalyst Types

Perumal,

Pokhrel,

Muhammad

et al. 2024

ACS Materials Lett.

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Hydrogen energy, heralded as a novel, clean, and highly efficient energy source, stands at the forefront of initiatives aimed at decarbonizing and fostering a sustainable carbon-neutral economy. Recent strides in hydrogen production through water splitting have marked significant progress, leveraging its inherent benefits, such as zero carbon emissions, safety, and exceptional product purity. Despite these advancements, challenges persist in surmounting the substantial energy barrier and watersplitting costs. Many efficient electrocatalysts have been innovatively designed and reported to address these hurdles. However, the translation of these advances into industrial-scale applications faces multifaceted obstacles. Urgent demands for highperformance electrocatalysts meeting industrial standards underscore the imperative for a deeper comprehension of water-splitting systems. This review delves into the latest developments in water electrolysis, synthesizing experimental findings and promising strategies with different electrochemical parameters along with high entropy metals, doping engineering, interface construction, and defect engineering. Despite considerable strides in creating efficient watersplitting electrocatalysts and numerous recent investigations, numerous challenges persist, impeding the widespread industrial implementation of electrolytic water splitting. By providing a comprehensive overview, this review aims to furnish a knowledge-driven framework in fundamental science while fostering inspiration for technical engineering endeavors to craft efficient electrocatalysts tailored for water splitting.

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Section: Alkaline Electrolytementioning

confidence: 99%

Recent Advances in Electrochemical Water Splitting Electrocatalysts: Categorization by Parameters and Catalyst Types

Perumal,

Pokhrel,

Muhammad

et al. 2024

ACS Materials Lett.

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Amorphous Iridium Oxide-Integrated Anode Electrodes with Ultrahigh Material Utilization for Hydrogen Production at Industrial Current Densities

Ding,

Li,

Wang

et al. 2024

Nano-Micro Lett.

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Herein, ionomer-free amorphous iridium oxide (IrOx) thin electrodes are first developed as highly active anodes for proton exchange membrane electrolyzer cells (PEMECs) via low-cost, environmentally friendly, and easily scalable electrodeposition at room temperature. Combined with a Nafion 117 membrane, the IrOx-integrated electrode with an ultralow loading of 0.075 mg cm−2 delivers a high cell efficiency of about 90%, achieving more than 96% catalyst savings and 42-fold higher catalyst utilization compared to commercial catalyst-coated membrane (2 mg cm−2). Additionally, the IrOx electrode demonstrates superior performance, higher catalyst utilization and significantly simplified fabrication with easy scalability compared with the most previously reported anodes. Notably, the remarkable performance could be mainly due to the amorphous phase property, sufficient Ir3+ content, and rich surface hydroxide groups in catalysts. Overall, due to the high activity, high cell efficiency, an economical, greatly simplified and easily scalable fabrication process, and ultrahigh material utilization, the IrOx electrode shows great potential to be applied in industry and accelerates the commercialization of PEMECs and renewable energy evolution.

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Optimizing oxygen transport in proton exchange membrane water electrolysis through tailored porosity configurations of porous transport layers

Li,

He,

Zhang

et al. 2024

Applied Energy

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Ionomer-free nanoporous iridium nanosheet electrodes with boosted performance and catalyst utilization for high-efficiency water electrolyzers

Cited by 8 publications

References 45 publications

Recent Advances in Electrochemical Water Splitting Electrocatalysts: Categorization by Parameters and Catalyst Types

Recent Advances in Electrochemical Water Splitting Electrocatalysts: Categorization by Parameters and Catalyst Types

Amorphous Iridium Oxide-Integrated Anode Electrodes with Ultrahigh Material Utilization for Hydrogen Production at Industrial Current Densities

Optimizing oxygen transport in proton exchange membrane water electrolysis through tailored porosity configurations of porous transport layers

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