High-valent metal site incorporated heterointerface catalysts for high-performance anion-exchange membrane water electrolysers

Choi, Gwan Hyun; Selvam, N. Clament Sagaya; Kim, Hyun Woo; Park, Young Sang; Jung, Jiyoon; Nam, Myeong Gyun; Jeon, Hyo Sang; Lee, Albert S.; Yoon, Won‐Sub; Yoo, Pil J.

doi:10.1016/j.apcatb.2023.122816

Cited by 17 publications

(8 citation statements)

References 64 publications

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“…The advantages of hydrogen energy, including its high energy density and environmental friendliness, position it as an exemplary clean energy source. − However, the challenge lies in efficiently and expeditiously obtaining hydrogen energy. Hydrogen production from water electrolysis or seawater electrolysis is known as an ideal method to efficiently obtain hydrogen energy, encompassing the cathodic hydrogen evolution reaction (HER) and the anodic oxygen evolution reaction (OER). − However, due to the four-proton coupled electron transfer process involved in the anodic oxygen evolution reaction, its rate is hindered, thereby reducing the efficiency of water electrolysis for hydrogen energy generation. − Consequently, exploring alternative anode reactions represents a viable approach to address this current challenge.…”

Section: Introductionmentioning

confidence: 99%

Electronic Structure Modulation Via Iron-Incorporated NiO to Boost Urea Oxidation/Oxygen Evolution Reaction

He,

et al. 2024

Inorg. Chem.

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The urea-assisted water splitting not only enables a reduction in energy consumption during hydrogen production but also addresses the issue of environmental pollution caused by urea. Doping heterogeneous atoms in Ni-based electrocatalysts is considered an efficient means for regulating the electronic structure of Ni sites in catalytic processes. However, the current methodologies for synthesizing heteroatom-doped Ni-based electrocatalysts exhibit certain limitations, including intricate experimental procedures, prolonged reaction durations, and low product yield. Herein, Fe-doped NiO electrocatalysts were successfully synthesized using a rapid and facile solution combustion method, enabling the synthesis of 1.1107 g within a mere 5 min. The incorporation of iron atoms facilitates the modulation of the electronic environment around Ni atoms, generating a substantial decrease in the Gibbs free energy of intermediate species for the Fe−NiO catalyst. This modification promotes efficient cleavage of C−N bonds and consequently enhances the catalytic performance of UOR. Benefiting from the tunability of the electronic environment around the active sites and its efficient electron transfer, Fe− NiO electrocatalysts only needs 1.334 V to achieve 50 mA cm −2 during UOR. Moreover, Fe−NiO catalysts were integrated into a dual electrode urea electrolytic system, requiring only 1.43 V of cell voltage at 10 mA cm −2 .

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Section: Introductionmentioning

confidence: 99%

Electronic Structure Modulation Via Iron-Incorporated NiO to Boost Urea Oxidation/Oxygen Evolution Reaction

He,

et al. 2024

Inorg. Chem.

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“…Although reports exist for non-commercial membranes achieving 5.4–14.0 A cm –2 at 2 V, − they are excluded from this analysis. We chose to focus our comparison on electrolyzers utilizing commercial membranes due to their widespread availability, established performance characteristics, and ease of accessibility, ensuring a comprehensive and reliable assessment of current practices in the field.…”

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confidence: 99%

The Rationale for a Standardized Testing Protocol for Anion Exchange Membrane Water Electrolyzers

Titheridge,

Marshall

2024

ACS Energy Lett.

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“…The mRu/RuO 2 /NF has the lowest resistance among the studied samples because the heterogeneous interface can promote the electron transfer between Ru and RuO 2 . 43 In addition, the stability of the catalysts was evaluated via cyclic voltammetry (CV). After 6000 CV cycles, the overpotential in the LSV curve is only slightly increased by 2 mV.…”

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confidence: 99%

“…Electrochemical impedance spectroscopy (EIS) was further performed to assess the charge resistance of the samples (Figure c). The mRu/RuO 2 /NF has the lowest resistance among the studied samples because the heterogeneous interface can promote the electron transfer between Ru and RuO 2 . In addition, the stability of the catalysts was evaluated via cyclic voltammetry (CV).…”

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confidence: 99%

Engineering Nano/Mesoporous Ru/RuO₂ Heterostructured Films for Water Splitting

Wang,

Li,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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The design and development of efficient nanocatalysts are critical for sustainable hydrogen production via electrochemical water splitting. In this study, we synthesize mesoporous ruthenium film on Ni foam (mRu/NF) by micelle-assisted electrodeposition, followed by annealing in air to obtain mesoporous heterogeneous Ru-RuO 2 film on NF (mRu/RuO 2 /NF) for alkaline water splitting. The mRu/RuO 2 /NF possesses low overpotentials for the oxygen evolution reaction (243 mV) and hydrogen reduction reaction (53 mV) at 50 mA cm −2 due to the high nanoporosity and heterogeneous interfaces. When mRu/RuO 2 /NF is applied to both the anode and cathode, the electrolyzer needs a lower potential of 1.587 V to drive the current density of 100 mA cm −2 than the commercial Pt/C/NF||IrO 2 /NF system (1.780 V). This study confirms the importance of interfacial engineering in the enhancement of water splitting.

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High-valent metal site incorporated heterointerface catalysts for high-performance anion-exchange membrane water electrolysers

Cited by 17 publications

References 64 publications

Electronic Structure Modulation Via Iron-Incorporated NiO to Boost Urea Oxidation/Oxygen Evolution Reaction

Electronic Structure Modulation Via Iron-Incorporated NiO to Boost Urea Oxidation/Oxygen Evolution Reaction

The Rationale for a Standardized Testing Protocol for Anion Exchange Membrane Water Electrolyzers

Engineering Nano/Mesoporous Ru/RuO₂ Heterostructured Films for Water Splitting

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High-valent metal site incorporated heterointerface catalysts for high-performance anion-exchange membrane water electrolysers

Cited by 17 publications

References 64 publications

Electronic Structure Modulation Via Iron-Incorporated NiO to Boost Urea Oxidation/Oxygen Evolution Reaction

Electronic Structure Modulation Via Iron-Incorporated NiO to Boost Urea Oxidation/Oxygen Evolution Reaction

The Rationale for a Standardized Testing Protocol for Anion Exchange Membrane Water Electrolyzers

Engineering Nano/Mesoporous Ru/RuO2 Heterostructured Films for Water Splitting

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Engineering Nano/Mesoporous Ru/RuO₂ Heterostructured Films for Water Splitting