Acta Phys. -Chim. Sin. ›› 2024, Vol. 40 ›› Issue (10): 2312007.doi: 10.3866/PKU.WHXB202312007
Special Issue: Solar Fuel Photocatalyst
• ARTICLE • Previous Articles Next Articles
Spontaneously Improved Adsorption of H2O and Its Intermediates on Electron-Deficient Mn(3+δ)+ for Efficient Photocatalytic H2O2 Production
Xinyu Yin1, Haiyang Shi1, Yu Wang1, Xuefei Wang1,*(
), Ping Wang1, Huogen Yu2,*()
- 1 School of Materials Science and Engineering, and School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
2 Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430078, China
-
Received:2023-12-06Revised:2024-01-10Accepted:2024-01-10Published:2024-03-13 -
Contact:Email: xuefei@whut.edu.cn (Xuefei Wang)yuhuogen@cug.edu.cn (Huogen Yu) -
Supported by:the National Natural Science Foundation of China(22178276); the National Natural Science Foundation of China(U22A20147); the National Natural Science Foundation of China(52073263); the Natural Science Foundation of Hubei Province of China(2022CFA001)
Cite this article
Xinyu Yin, Haiyang Shi, Yu Wang, Xuefei Wang, Ping Wang, Huogen Yu. Spontaneously Improved Adsorption of H2O and Its Intermediates on Electron-Deficient Mn(3+δ)+ for Efficient Photocatalytic H2O2 Production[J]. Acta Phys. -Chim. Sin. 2024, 40(10), 2312007. doi: 10.3866/PKU.WHXB202312007
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Fig 1
Schematic diagram illustrating the electron-deficient Mn site for improving H2O-adsorption: (1) weak H2O-adsorption of Mn3+ on MnOOH; (2) the formation of electron-deficient Mn sites; (3) enhanced adsorption of H2O on Mn(3+δ)+."
Fig 2
(A) Schematic diagram illustrating the controllable preparation of the AuPd/BiVO4/MnOOH photocatalysts; (B) the photographs of various samples: (a) BiVO4, (b) AuPd/BiVO4, and (c) AuPd/BiVO4/MnOOH; (C) the photodeposition mechanism of MnOOH on (110) facet of BiVO4."
Fig 3
FESEM images of (A) BiVO4, (B) AuPd/BiVO4, (C) BiVO4/MnOOH (0.5%), and (D) AuPd/BiVO4/MnOOH (0.5%)."
Fig 4
(A, B) TEM images, (C) HAADF-STEM image, (D–F) EDS mapping images, and (G, H) EDS line mapping images of AuPd/BiVO4/MnOOH (0.5%) photocatalyst."
Fig 5
(A) XRD patterns, (B) UV-Vis absorbance spectra, photographs, (C, D) Raman spectra, (E) XPS survey spectra, and high-resolution XPS spectra of (F) Au 4f, (G) Pd 3d, and (H, I) O 1s for various samples: (a) BiVO4, (b) AuPd/BiVO4, (c) AuPd/BiVO4/MnOOH (0.5%), (d) AuPd/BiVO4/MnOOH (2%), and (e) BiVO4/MnOOH (0.5%)."
Fig 6
(A) Photocatalytic H2O2 production; (B) Cycle test for AuPd/BiVO4/MnOOH (0.5%) photocatalyst; (C) Time-dependent curves of photocatalytic H2O2 decomposition and (D) kf and kd values of various samples: (a) BiVO4, (b) AuPd/BiVO4, (c) AuPd/BiVO4/MnOOH (0.2%), (d) AuPd/BiVO4/MnOOH (0.5%), (e) AuPd/BiVO4/MnOOH (1%), (f) BiVO4/MnOOH (0.5%) and (g) without photocatalyst."
Fig 7
Calculated average potential profile along the Z axis of (A) BiVO4 and (B) MnOOH cocatalyst; High-resolution XPS spectra of (C) Mn 2p and (D) Bi 4f for (a) BiVO4 and (b) AuPd/BiVO4/MnOOH (2%); (E) Schematic diagrams for charge transfer between the BiVO4 and MnOOH catalysts: before contact and after contact."
Fig 8
(A) Optimized models for DFT calculations: BiVO4, MnOOH and BiVO4/MnOOH; (B) The local charge density difference of BiVO4/MnOOH; (C) Schematic illustration about the charge modulation to form electron-deficient Mn(3+δ)+ centers; (D) DFT-calculated adsorption energies of H2O and intermediate free radicals of 4-electron WOR; (E) Schematic illustration about the improved catalytic efficiency and interfacial O2-evolution mechanism of the Mn(3+δ)+ cocatalyst in 4-electron WOR."
Fig 9
(A) TR-PL spectra of various samples: (a) BiVO4, (b) AuPd/BiVO4, (c) AuPd/BiVO4/MnOOH (0.5%), and (d) BiVO4/MnOOH (0.5%); (B) Schematic illustration for the photocatalytic H2O2-evolution mechanism of the AuPd/BiVO4/MnOOH photocatalyst."
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