Au nanocluster coupling with Gd-Co2B nanoflakes embedded in reduced TiO2 nanosheets: Seawater electrolysis at low cell voltage with high selectivity and corrosion resistance

Haq, Tanveer Ul; Pasha, Mujaheed; Tong, Yongfeng; Mansour, Said; Haik, Yousef

doi:10.1016/j.apcatb.2021.120836

Cited by 75 publications

(72 citation statements)

References 39 publications

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“…However, due to the higher redox potential of Cl À /Cl 2 (Cl À /ClO À in alkaline solution), CER is less thermodynamically favorable than OER. Specifically, the potential seawater electrolyzers, 33,[53][54][55][56][57][58][59][60][61][62] Fe 0.01 -Ni&Ni 0.2 Mo 0.8 N8Fe 0.01 &Mo-NiO delivers a record-high current density of 688 mA cm À2 at the voltage of 1.7 V. Compared to our previous study of a two-electrode electrolyzer using NiMoN as the cathode and NiFeN/NiMoN as the anode, the current density of Fe 0.01 -Ni&Ni 0.2 Mo 0.8 N8Fe 0.01 &Mo-NiO at 1.7 V is about 2.2 times as large. 33 These results reveal the excellent seawater electrolysis performance of Fe 0.01 -Ni&Ni 0.2 Mo 0.8 N8Fe 0.01 &Mo-NiO and again underscore the importance of utilizing electrochemical reconstruction for the design of highly active bifunctional catalysts.…”

Section: Papermentioning

confidence: 99%

Boosting efficient alkaline fresh water and seawater electrolysis via electrochemical reconstruction

Ning

Zhang

et al. 2022

Energy Environ. Sci.

136

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Section: Papermentioning

confidence: 99%

Boosting efficient alkaline fresh water and seawater electrolysis via electrochemical reconstruction

Ning

Zhang

et al. 2022

Energy Environ. Sci.

136

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“…In another report, we have described the role of the amorphous Au-Gd-Co 2 B@TiO 2 sheet for seawater electrolysis. [41] We have observed that amorphous catalyst has higher specific activity, ECSA, FE, and TOF than crystalline material. Gd-Co 3 O 4 has an amorphous phase synthesized by the electrodeposition approach, while NaBH 4 treatment imparts further increment in the amorphous structure.…”

Section: Amorphous Structurementioning

confidence: 74%

“…We synthesized Au nanoclusters-decorated gadolinium-cobalt boride nanoflakes embedded in TiO 2 nanosheets (Au-Gd-Co 2 B@TiO 2 ) that demonstrated outstanding activity (η@1000 mA cm À2 ¼ 510 mV) and selectivity for unpurified seawater electrolysis (FE >98% for OER and HER). [41] The improved selectivity was assigned to the exposed Au-Gd-Co 2 B interface that decreased the energy barrier of the rate-determining step from 1.17 to 0.77 eV. The highly electronegative Au with lower d-band oxidizes Co to a high valance state and modulates the Co d-band.…”

Section: Electronic Optimizationsmentioning

confidence: 99%

Section: Electronic Optimizationsmentioning

confidence: 99%

mentioning

confidence: 99%

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Strategies of Anode Design for Seawater Electrolysis: Recent Development and Future Perspective

Haq

Haik

2022

Small Science

Self Cite

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Compared with freshwater splitting, seawater electrolysis has more spaces to be explored, which is primarily attributed to the additional critical catalytic challenges of the competition between anodic oxygen evolution reaction (OER) and chlorine chemistry, deep corrosion, and site blocking due to the presence of chloride ions and insoluble particulate in seawater. However, if direct seawater electrolysis can be realized, it would revolutionize the energy and environmental sectors. In this review, the current effective strategies are summarized, including electronic modulation, oxygen vacancies creation, amorphous and porous structure design, corrosion-resistant passive layer decoration, and creating strong catalyst-support interactions. The review also provides insights for seawater electrolysis on rational design of the OER catalyst with high selectivity, activity, corrosion resistance, chemical, and mechanical durability. Beyond the progress made to date, a perspective in the fabrication of high-performance anodes for direct seawater electrolysis is also proposed. Collectively, this review will shed light on the rational design of a viable anode for massive and sustainable hydrogen fuel production from immense seawater.

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Key Strategies for Continuous Seawater Splitting for Hydrogen Production: From Principles and Catalyst Materials to Electrolyzer Engineering

Du,

Wang,

Song

et al. 2024

Adv Funct Materials

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Due to the high cost of ultra‐pure water supply and the mismatch between water sources and renewable energy distribution, the large‐scale production of green hydrogen through seawater electrolysis has generated significant interest. This presents an attractive potential technology within the framework of carbon‐neutral energy production. However, owing to the complex composition of seawater, particularly the competitive oxidation reactions and corrosion issues involving Cl−, seawater electrolysis has suffered from low selectivity and poor stability in oxygen evolution reaction (OER), which severely impact the efficiency of hydrogen production and hinder the practical applications. To further promote in‐depth research and practical applications of seawater electrolysis, this review introduces the principles, key advantages, and challenges of seawater electrolysis. Specifically, the design strategies are categorized for highly active OER electrocatalysts for seawater electrolysis, including catalyst design, design of chemical reaction systems, and other special process design. To ensure long‐term operational stability of seawater electrolysis, various strategies such as employing self‐supporting materials, surface protection strategies, and electrolyzer design, are discussed. Finally, current challenges and future prospects for the industrialization of seawater electrolysis are proposed and discussed. It is expected that this review provides new insights for large‐scale seawater‐based hydrogen production in the future.

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Au nanocluster coupling with Gd-Co2B nanoflakes embedded in reduced TiO2 nanosheets: Seawater electrolysis at low cell voltage with high selectivity and corrosion resistance

Cited by 75 publications

References 39 publications

Boosting efficient alkaline fresh water and seawater electrolysis via electrochemical reconstruction

Boosting efficient alkaline fresh water and seawater electrolysis via electrochemical reconstruction

Strategies of Anode Design for Seawater Electrolysis: Recent Development and Future Perspective

Key Strategies for Continuous Seawater Splitting for Hydrogen Production: From Principles and Catalyst Materials to Electrolyzer Engineering

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