Electronic redistribution induced by interaction between ruthenium nanoparticles and Ni–N(O)–C sites boosts alkaline water electrolysis

Wang, Jiacheng; He, Wangtao; Zong, Yuyang; Tang, Yanfeng; Wang, Jin; Ma, Ruguang

doi:10.1039/d4cc02851a

Chem. Commun.

2024

DOI: 10.1039/d4cc02851a

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Electronic redistribution induced by interaction between ruthenium nanoparticles and Ni–N(O)–C sites boosts alkaline water electrolysis

Jiacheng Wang,

Wangtao He,

Yuyang Zong

et al.

Abstract: Ultrafine ruthenium nanoparticles are encapsulated by single-atom Ni-bonded graphitic carbon nitride (g-C3N4) layers anchored on carbon nanotubes (Ru/Ni-CNCT). The enhanced electronic interaction between Ru nanoparticles and Ni-N(O)-C sites anchored in...

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Cited by 4 publications

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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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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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Surface Anticorrosion Engineering by Polyphosphate Oxyanions for Durable Seawater Oxidation

Wang,

Hu,

Song

et al. 2024

Advanced Energy Materials

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Electrolysis of seawater represents great potentials for sustainable hydrogen production. However, both competitive Cl− adsorption and catalysts corrosion caused by chlorine oxidation reaction (ClOR) are major challenges in seawater electrolysis. Inspired by the concept of hard and soft acids and bases (HSAB), polyphosphate oxyanions (P3O105−) on Ni(OH)2 surface is coordinated to obtain harder acid Ni sites, which could obtain 160 times stability enhancement compared to pure Ni(OH)2 for oxygen evolution reaction (OER) in alkaline seawater at 800 mA cm−2. Also, the turnover frequency value on Ni(OH)2‐P3O105− is 50 times that on Ni(OH)2, implying higher intrinsic OER activity of Ni(OH)2‐P3O105−. Theoretical and experimental investigations show that P3O105− could facilitate transition of Ni3+ to harder acid Ni>3+, thus preferring adsorption of hard base OH− rather than soft base Cl−. This could enhance OER selectivity and inhibit undesirable ClOR. Furthermore, molecular dynamics simulations indicate that the Cl− concentration near the electrode could be reduced by nearly half due to electrostatic repulsion of Cl− by surface P3O105− oxyanions. When assembled into an electrolyzer for alkaline seawater splitting, it could operate at 2.2 V with large current up to 1.4 A for 240 h.

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Pd Nanoparticle Size‐Dependent H^* Coverage for Cu‐Catalyzed Nitrate Electro‐Reduction to Ammonia in Neutral Electrolyte

Zhu,

Wang,

et al. 2024

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Electrochemical conversion of nitrate (NO3−) to ammonia (NH3) is an effective approach to reduce nitrate pollutants in the environment and also a promising low‐temperature, low‐pressure method for ammonia synthesis. However, adequate H* intermediates are highly expected for NO3− hydrogenation, while suppressing competitive hydrogen evolution. Herein, the effect of H* coverage on the NO3RR for ammonia synthesis by Cu electrocatalysts is investigated. The H* coverage can be adjusted by changing Pd nanoparticle sizes. The optimized Pd@Cu with an average Pd size of 2.88 nm shows the best activity for NO3RR, achieving a maximum Faradaic efficiency of 97% (at −0.8 V vs RHE) and an NH3 yield of 21 mg h−1 cm−2, from an industrial wastewater level of 500 ppm NO3–. In situ electrochemical experiments indicate that Pd particles with 2.88 nm can promote NO3− hydrogenation to NH3 via well‐modulated coverage of adsorbed H* species. Coupling the anodic glycerol oxidation reaction, ammonium and formate are successfully obtained as value‐added products in a membrane electrode assembly electrolyzer. This work provides a feasible strategy for obtaining size‐dependent H* intermediates for hydrogenation.

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Electronic redistribution induced by interaction between ruthenium nanoparticles and Ni–N(O)–C sites boosts alkaline water electrolysis

Abstract: Ultrafine ruthenium nanoparticles are encapsulated by single-atom Ni-bonded graphitic carbon nitride (g-C3N4) layers anchored on carbon nanotubes (Ru/Ni-CNCT). The enhanced electronic interaction between Ru nanoparticles and Ni-N(O)-C sites anchored in...

Cited by 4 publications

References 22 publications

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

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

Surface Anticorrosion Engineering by Polyphosphate Oxyanions for Durable Seawater Oxidation

Pd Nanoparticle Size‐Dependent H^* Coverage for Cu‐Catalyzed Nitrate Electro‐Reduction to Ammonia in Neutral Electrolyte

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Electronic redistribution induced by interaction between ruthenium nanoparticles and Ni–N(O)–C sites boosts alkaline water electrolysis

Abstract: Ultrafine ruthenium nanoparticles are encapsulated by single-atom Ni-bonded graphitic carbon nitride (g-C3N4) layers anchored on carbon nanotubes (Ru/Ni-CNCT). The enhanced electronic interaction between Ru nanoparticles and Ni-N(O)-C sites anchored in...

Cited by 4 publications

References 22 publications

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

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

Surface Anticorrosion Engineering by Polyphosphate Oxyanions for Durable Seawater Oxidation

Pd Nanoparticle Size‐Dependent H* Coverage for Cu‐Catalyzed Nitrate Electro‐Reduction to Ammonia in Neutral Electrolyte

Contact Info

Product

Resources

About

Pd Nanoparticle Size‐Dependent H^* Coverage for Cu‐Catalyzed Nitrate Electro‐Reduction to Ammonia in Neutral Electrolyte