Ag3PO4/Ti3C2 MXene interface materials as a Schottky catalyst with enhanced photocatalytic activities and anti-photocorrosion performance

Cai, Tao; Wang, Longlu; Liu, Yutang; Zhang, Shuqu; Dong, Wanyue; Chen, Hui; Yi, Xuanying; Yuan, Jili; Xia, Xinnian; Liu, Chengbin; Luo, Shenglian

doi:10.1016/j.apcatb.2018.08.053

Cited by 518 publications

(157 citation statements)

References 56 publications

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“…Due to its Gibbs free energy for hydrogen adsorption (Δ G H ) close to zero, [ 4 ] Ti 3 C 2 can be an excellent co‐catalyst for water reduction to hydrogen. Many investigations have verified the boosting photocatalytic water splitting activity with participation of Ti 3 C 2 , with Ag 3 PO 4 , [ 4 ] Co 3 O 4 , [ 5 ] g‐C 3 N 4 , [ 6 ] CdS, [ 7 ] and many other materials. [ 8–12 ]…”

Section: Figurementioning

confidence: 99%

Photogenerated Electron Transfer Process in Heterojunctions: In Situ Irradiation XPS

et al. 2020

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Photoelectron transfer between heterojuctions is an important process for photocatalysis, and identification of the electron transfer process provides valuable information for catalyst design. Herein, Ti3C2, one of the widely used two‐dimensional materials, is used to produce a heterojunction of TiO2 and Ti3C2 by an in situ growth method and the photogenerated electrons transfer between the two components for photocatalytic water splitting to hydrogen is investigated. Theoretical simulation and experimental tests proclaim that electrons transfer from Ti3C2 to TiO2 forms an internal electric field, which implies that there exists the driving force of electronic movement from TiO2 to Ti3C2. In situ irradiation X‐ray photoelectron spectroscopy shows the binding energies of TiC (in Ti3C2) and TiO (in TiO2) move toward negative and positive positions, respectively, verifying the photogenerated electrons produced from TiO2 and transferring to Ti3C2 driven by the internal electric field. In addition, the amount of TiO2 nanoparticles also affects the hydrogen evolution rate. Several parallel experiments are designed to uncover the fact that less or excess amount of TiO2 nanoparticles leads to a tinier shift of binding energy, which hints the quantity of heterojunction is a considerable factor in photocatalytic performance. This work develops a new method to directly monitor the photoelectron transfer process between heterojuctions.

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Section: Figurementioning

confidence: 99%

Photogenerated Electron Transfer Process in Heterojunctions: In Situ Irradiation XPS

et al. 2020

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“…As a result, the dyadic catalysts have substantially improved the chemical reactivity, selectivity, and stability than their single counterpart. Thus, the concept of Mott–Schottky effect has been applied in many catalyst fields, such as photo‐catalytic,7 nitrogen fixation,8 organic reaction,5a,9 methanol dehydrogenation,10 oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) 6,11. However, to our knowledge, this advanced concept is rarely proposed in ORR electrochemistry.…”

Section: Introductionmentioning

confidence: 99%

Simultaneously Realizing Rapid Electron Transfer and Mass Transport in Jellyfish‐Like Mott–Schottky Nanoreactors for Oxygen Reduction Reaction

Sun

Wang

Zhang

et al. 2020

Adv Funct Materials

209

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Fundamental understanding of constructing elevated catalysts to realize fast electron transfer and rapid mass transport in oxygen reduction reaction (ORR) chemistry by interface regulation and structure design is important but still ambiguous. Herein, a novel jellyfish-like Mott-Schottkytype electrocatalyst is developed to realize fast electron transfer and decipher the structure-mass transport connection during ORR process. Both spectroscopy techniques and density functional theory calculation demonstrate electrons spontaneously transfer from Fe to N-doped graphited carbon at the heterojunction interface, thus accelerating electron transfer from electrode to reactant. Dynamic analysis indicates unique structure can significantly improve mass transport of oxygen-species due to two factors: one is electrolyte streaming effect caused by tentacle-like carbon nanotubes; the other is effective collision probability in the semiclosed cavity. Therefore, this Mott-Schottky-type catalyst delievers superior ORR performance with high onset potential, positive half wave potential, and large current density. It also exhibits low overpotential when serving as an air cathode in Zn-air batteries. This work deepens understanding of the two key factors-electron transfer and mass transport-on determining the kinetic reaction of ORR process and offers a new avenue in constructing efficient Mott-Schottky electrocatalysts.

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“…The intimate contact between Bi 2 WO 6 nanosheets and Ti 3 C 2 T x is beneficial for the interfacial charge transfer in the composites and thus the photoactivity enhancement towards CO 2 reduction as compared to bare Bi 2 WO 6 . In addition, different MXenes-based composites have also been fabricated through in situ growth of semiconductors on the 2D surface of MXenes, such as Ti 3 C 2 T x -CdS, [70,71] Ti 3 C 2 T x -ZnS, [72] [73] Ti 3 C 2 T x -ZnIn 2 S 4 , [74] Ti 3 C 2 T x -BiOBr, [75] Ti 3 C 2 T x -BiOCl, [76] [77] Nb 2 CT x -TiO 2 , [34] Nb 2 CT x -Bi 2 WO 6 , [78] Mo 2 CT x -CdS, [79] etc. [80][81][82][83][84][85][86] (detailed information can be found in Table 1).…”

Section: Growing Platformmentioning

confidence: 99%

Positioning MXenes in the Photocatalysis Landscape: Competitiveness, Challenges, and Future Perspectives

Xie

Zhang

2020

Adv Funct Materials

188

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MXenes are becoming a worthy contender for boosting the efficacy of semiconductor photocatalysts because of their rich surface and electronic properties, which is exemplified to be a dynamic yet open‐ended exploration of the materials space. Herein, the promise that MXenes hold for photocatalytic applications is elucidated by presenting the various roles of MXenes in the preparation of composite photocatalysts and enhancing their activity and stability. A specific focus is put on the key issues that should be taken into account when utilizing the specific function of MXenes and the strategies to deliver the great potential of MXenes into better play. The discussion is based on different aspects closely related to the flexible surface and electronic features of MXenes, including their morphology control, stability issue, and electronic structure mutability with the purpose to present an objective and comprehensive scenario of MXenes for photocatalysis. Finally, some noteworthy research directions for the future development of MXenes‐based photocatalytic systems are outlined and prospected. This review is expected to provide a useful scaffold for the rational design and synthesis of efficient and stable MXenes‐based photocatalysts by objectively understanding and taming the functional vitality of MXenes.

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Ag3PO4/Ti3C2 MXene interface materials as a Schottky catalyst with enhanced photocatalytic activities and anti-photocorrosion performance

Cited by 518 publications

References 56 publications

Photogenerated Electron Transfer Process in Heterojunctions: In Situ Irradiation XPS

Photogenerated Electron Transfer Process in Heterojunctions: In Situ Irradiation XPS

Simultaneously Realizing Rapid Electron Transfer and Mass Transport in Jellyfish‐Like Mott–Schottky Nanoreactors for Oxygen Reduction Reaction

Positioning MXenes in the Photocatalysis Landscape: Competitiveness, Challenges, and Future Perspectives

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