Bidirectional modulation interaction between monatomic Pt and Tin+ sites on Ti4O7 for high-efficiency and durable oxygen reduction

Luo, Yangjun; Wang, Yanwei; Qin, Xuetao; Wang, Youyuan; Wu, Kai; Zhang, Huijuan; Zhang, Li; Huang, Heming; Tian, Wenjing; Wang, Yu

doi:10.1016/j.jcat.2022.05.008

Cited by 9 publications

(4 citation statements)

References 44 publications

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“…The excited active center Ti n + moderates the O 2 adsorption intensity and dissociates the O=O bond, making it more inclined to 4e À ORR and inhibiting H 2 O 2 production. [23] To investigate the presence of tin on the surface of the material and to analyze the cations in the oxidized state, XPS studies were carried out on these samples. The XPS spectra of D-1 %SnÀ Ti 4 O 7 are given in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

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Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Sun,

Luo,

Dai

et al. 2024

Chemistry A European J

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Developing stable and highly selective two‐electron oxygen reduction reaction (2e− ORR) electrocatalysts for producing hydrogen peroxide (H2O2) is considered a major challenge to replace the anthraquinone process and achieve a sustainable green economy. Here, we doped Sn into Ti4O7 (D−Sn−Ti4O7) by simple polymerization post‐calcination method as a high‐efficiency 2e− ORR electrocatalyst. In addition, we also applied plain calcination after the grinding method to load Sn on Ti4O7 (L−Sn−Ti4O7) as a comparison. However, the performance of L−Sn−Ti4O7 is far inferior to that of the D−Sn−Ti4O7. D−Sn−Ti4O7 exhibits a starting potential of 0.769 V (versus the reversible hydrogen electrode, RHE) and a high H2O2 selectivity of 95.7 %. Excitingly, the catalyst can maintain a stable current density of 2.43 mA ⋅ cm−2 for 3600 s in our self‐made H‐type cell, and the cumulative H2O2 production reaches 359.2 mg ⋅ L−1 within 50,000 s at 0.3 V. The performance of D−Sn−Ti4O7 is better than that of the non‐noble metal 2e− ORR catalysts reported so far. The doping of Sn not only improves the conductivity but also leads to the lattice distortion of Ti4O7, further forming more oxygen vacancies and Ti3+, which greatly improves its 2e− ORR performance compared with the original Ti4O7. In contrast, since the Sn on the surface of L−Sn−Ti4O7 displays a synergistic effect with Tin+ (3≤n≤4) of Ti4O7, the active center Tin+ dissociates the O=O bond, making it more inclined to 4e− ORR.

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Section: Resultsmentioning

confidence: 99%

“…The authors have cited additional references within the Supporting Information. [31][32][33][34][35][36][37][38][39][40][41][42][43]…”

Section: Methodsmentioning

confidence: 99%

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Sun,

Luo,

Dai

et al. 2024

Chemistry A European J

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“…5d, it can be noticed that the DOS of Ti-3d near the Fermi level increased, which is caused by the hybridization of the Ti-3d orbitals with the Ni-3d and Fe-3d orbitals. 50 It is beneficial for enhancing the electrical conductivity of Ti 4 O 7 , reducing the resistance for electron transfer and accelerating the interfacial electron transfer dynamics. Furthermore, the charge density difference of the NiFe alloy NPs supported on Ti 4 O 7 (12̄0) were calculated, it can be clearly seen in Fig.…”

Section: Resultsmentioning

confidence: 99%

Unique amorphous/crystalline heterophase coupling for an efficient oxygen evolution reaction

et al. 2022

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“…Ti 4 O 7 possesses a double catalytic effect on ORR and OER, 8 and there are no insulating by-products (such as Li 2 CO 3 , which would hinder the electron transfer process of the electrode and cause excessive overcharge potential 9 ) compared with carbon material. When used as the electrode carrier, Ti 4 O 7 will interact with the loaded catalyst, 10,11 such as strong metal support interaction with precious metals, [11][12][13][14] facilitating the catalytic efficiency of ORR and OER. For nonmetallic catalysts with poor electrical conductivity, Ti 4 O 7 can promote electron transfer at the electrode and prevent catalyst agglomeration.…”

Section: Introductionmentioning

confidence: 99%

Structural and electronic properties of Ce‐doped Ti₄O₇ based on experiments and first‐principles calculations

Wei,

Jin,

2023

J Am Ceram Soc.

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A series of Ti4O7 powders with different Ce‐cation doping concentrations were successfully prepared through a new strategy combining the wet chemical method and hydrogen thermal reduction. It is shown that Ce, entering the lattice of Ti4O7 during the reduction process, only occurs in the form of Ce3+, and the solubility of Ce is equal to 8.93 at.%. Furthermore, the electrical conductivity of Ce‐doped Ti4O7 powders was tested for the first time and theoretically explained by the first‐principles calculations. It was revealed that Ce provides a negative effect on the electrical conductivity of Ti4O7 powders, which is due to the decrease in the number of electronic states near the Fermi energy level caused by the introduction of Ce.This article is protected by copyright. All rights reserved

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Bidirectional modulation interaction between monatomic Pt and Tin+ sites on Ti4O7 for high-efficiency and durable oxygen reduction

Cited by 9 publications

References 44 publications

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Unique amorphous/crystalline heterophase coupling for an efficient oxygen evolution reaction

Structural and electronic properties of Ce‐doped Ti₄O₇ based on experiments and first‐principles calculations

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Bidirectional modulation interaction between monatomic Pt and Tin+ sites on Ti4O7 for high-efficiency and durable oxygen reduction

Cited by 9 publications

References 44 publications

Sn Bulk Phase Doping and Surface Modification on Ti4O7 for Oxygen Reduction to Hydrogen Peroxide

Sn Bulk Phase Doping and Surface Modification on Ti4O7 for Oxygen Reduction to Hydrogen Peroxide

Unique amorphous/crystalline heterophase coupling for an efficient oxygen evolution reaction

Structural and electronic properties of Ce‐doped Ti4O7 based on experiments and first‐principles calculations

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Product

Resources

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Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Sn Bulk Phase Doping and Surface Modification on Ti₄O₇ for Oxygen Reduction to Hydrogen Peroxide

Structural and electronic properties of Ce‐doped Ti₄O₇ based on experiments and first‐principles calculations