Built-in electric field and core-shell structure of the reconstructed sulfide heterojunction accelerated water splitting

Yu, Shudi; Li, Jie; Yin, Jiongting; Liang, Wanyu; Zhang, Yangping; Liu, Tianpeng; Hu, Mengyun; Wang, Yong; Wu, Zhengying; Zhang, Yuefan; Du, Yukou

doi:10.1016/j.cclet.2024.110068

Chinese Chemical Letters

2024

DOI: 10.1016/j.cclet.2024.110068

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Built-in electric field and core-shell structure of the reconstructed sulfide heterojunction accelerated water splitting

Shudi Yu,

Jie Li,

Jiongting Yin

et al.

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Cited by 3 publications

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Ir Doping Modulates the Electronic Structure of Flower-Shaped Phosphides for Water Oxidation

Sun,

Yu,

Yin

et al. 2024

Inorg. Chem.

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Electrolysis of water to produce hydrogen is an efficient, clean, and environmentally friendly hydrogen production method with unlimited development prospects. However, its overall efficiency is hampered by the slow oxygen evolution reaction (OER) with complex electron transfer processes. Therefore, designing efficient and low-cost OER catalysts is the key to solving this problem. In this paper, Ir-doped Co 2 P/Fe 2 P (abbreviated as Ir-CoFeP/NF) was grown on nickel foam through the strategies of low amount noble-metal doping and mild phosphating. Phosphide derived from a floral metal−organic framework (MOF) exhibits regular three-dimensional (3D) morphology and large active area, avoiding the stacking of active sites. The addition of Ir can effectively adjust the electronic structure, change the position of the d-band center, and increase active sites, thus enhancing the catalytic activity. Hence, the optimized catalyst exhibits unexpected electrocatalytic OER activity with an ideal overpotential of 213 mV at 10 mA cm −2 , as well as a low Tafel slope of 40.63 mV dec −1 . Coupling with Pt/C for overall water splitting (OWS), the entire device only needs an ultralow cell voltage of 1.50 V to achieve a current density of 10 mA cm −2 . Besides, the OWS can be maintained for more than 70 h. This study demonstrates the superiority of Ir-doped phosphide in accelerating water oxidation.

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Ir Doping Modulates the Electronic Structure of Flower-Shaped Phosphides for Water Oxidation

Sun,

Yu,

Yin

et al. 2024

Inorg. Chem.

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Highly Conductive Non-Calcined 2D Cu_0.3Co_0.7 Bimetallic–Organic Framework for Urea Electrolysis in Simulated Seawater

Sanati,

Cordes,

Slawin

et al. 2024

Inorg. Chem.

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Global clean energy demands can be effectively addressed using the promising approach of hydrogen energy generation combined with less energy consumption. Hydrogen can be generated, and urea-rich wastewater pollution can be mitigated in a low-energy manner using the urea oxidation reaction (UOR). This paper seeks to assemble a unique electrocatalyst of a pristine 2D MOF, [Co(HBTC)(DMF)] n (Co-MUM-3), from 1,3,5-benzenetricarboxylate (BTC) to oxidize urea in simulated seawater. Ni foam (NF)-based working electrodes were fabricated by incorporating a series of heterometallic CuCo-MUM-3 frameworks (Cu 0.1 Co 0.9 -MUM-3, Cu 0.2 Co 0.8 -MUM-3, Cu 0.3 Co 0.7 -MUM-3, and Cu 0.4 Co 0.6 -MUM-3), after which their application in the urea oxidation reaction was examined. A very low required overpotential [1.26 V vs reversible hydrogen electrode (RHE) in 1 M KOH + 0.5 M NaCl (simulated seawater) + 0.33 M urea] and a Tafel slope of 112 mV dec −1 could be observed for the Cu 0.3 Co 0.7 -MUM-3 electrocatalyst, ensuring the achievement of urea electro-oxidation and hydrogen evolution reactions at a corresponding 10 mA cm −2 electrocatalytic current density. A relatively lower overpotential will be evident compared to other reported pristine MOFs, outperforming the commercial catalyst RuO 2 (1.41 V at 10 mA cm −2 , 131 mV dec −1 ) and ensuring considerable stability at significantly high current densities for a minimum of 72 h.

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Bimetallic MOF-based catalysts with enhanced activity for electrochemical hydrogen evolution in acid and alkaline electrolytes

Zhang,

Lu,

Cheng

et al. 2024

Inorg. Chem. Front.

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Built-in electric field and core-shell structure of the reconstructed sulfide heterojunction accelerated water splitting

Cited by 3 publications

References 25 publications

Ir Doping Modulates the Electronic Structure of Flower-Shaped Phosphides for Water Oxidation

Ir Doping Modulates the Electronic Structure of Flower-Shaped Phosphides for Water Oxidation

Highly Conductive Non-Calcined 2D Cu_0.3Co_0.7 Bimetallic–Organic Framework for Urea Electrolysis in Simulated Seawater

Bimetallic MOF-based catalysts with enhanced activity for electrochemical hydrogen evolution in acid and alkaline electrolytes

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Built-in electric field and core-shell structure of the reconstructed sulfide heterojunction accelerated water splitting

Cited by 3 publications

References 25 publications

Ir Doping Modulates the Electronic Structure of Flower-Shaped Phosphides for Water Oxidation

Ir Doping Modulates the Electronic Structure of Flower-Shaped Phosphides for Water Oxidation

Highly Conductive Non-Calcined 2D Cu0.3Co0.7 Bimetallic–Organic Framework for Urea Electrolysis in Simulated Seawater

Bimetallic MOF-based catalysts with enhanced activity for electrochemical hydrogen evolution in acid and alkaline electrolytes

Contact Info

Product

Resources

About

Highly Conductive Non-Calcined 2D Cu_0.3Co_0.7 Bimetallic–Organic Framework for Urea Electrolysis in Simulated Seawater