Synergetic integration of passivation layer and oxygen vacancy on hematite nanoarrays for boosted photoelectrochemical water oxidation

Li, Huamin; Wang, Zeyuan; Jing, Huijuan; Yi, Shasha; Zhang, Shengxi; Yue, Xinzheng; Zhang, Zhongtao; Lu, Hongxia; Chen, Deliang

doi:10.1016/j.apcatb.2020.119760

Cited by 46 publications

(19 citation statements)

References 45 publications

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“…In addition to the effect of the electrolyte, the enrichment of surface states and the severe recombination of photogenerated holes also cause the instability of the Fe2O3-based photoanode. Generally, surface states are divided into two types, intrinsic surface states derived from the loss of translational bulk crystal symmetry and extrinsic surface states due to chemical bond formation/surface interaction with a secondary species [86,87]. However, the intrinsic defect state is difficult to remove; hence, the surface defect state is generally eliminated by depositing a surface passivation layer to remove the extrinsic surface states.…”

Section: Fe 2 Omentioning

confidence: 99%

“…Because of the extensive attention of researchers on BiVO4, most of the works based on BiVO4 have been reported, such as that of Ni/FeOOH, CoOx, LDH, and so on [6]. Considering the presence of biological water oxidation complexes in photosystem II, which contain four manganese atoms and one calcium atom, efficient water oxidation using Mn-based OECs has been extensively studied [86]. The multiple oxidation states of Mn-based catalysts reduce the barrier of the O-Mn-O pathway to promote local hole transport around the Mn center, which may benefit the water oxidation activity.…”

Section: Bivo4mentioning

confidence: 99%

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Recent research progress on operational stability of metal oxide/sulfide photoanodes in photoelectrochemical cells

Meng¹,

Li²

2022

Nano Research Energy

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Photoelectrochemical (PEC) water splitting can directly convert solar energy into hydrogen energy for storage, effectively ending the energy crisis and solving environmental problems. With their modification by many researchers, photoanodes have rapidly improved in PEC performance. Nevertheless, the poor stability of PEC water-splitting devices has not been effectively corrected, seriously hindering their practical application and large-scale commercialization. In this review, we provide a detailed introduction to the photocorrosion mechanism of photoanodes and characterizations of stability, summarizing the current research progress on the stability of metal oxide/sulfide photoanode materials. According to the specificity of each semiconductor, the corrosion mechanism and modification strategy of each photoanode are discussed in detail. Finally, we summarize the deficiencies in the current stability research and propose influencing factors and possible solutions that need to be considered in the photocorrosion research field of photoanodes. This review can provide a reference for the stability research of photoanodes based on metal oxides and sulfides, especially for the design of efficient and stable metal sulfide-based photoanodes.

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Section: Fe 2 Omentioning

confidence: 99%

Section: Bivo4mentioning

confidence: 99%

Recent research progress on operational stability of metal oxide/sulfide photoanodes in photoelectrochemical cells

Meng¹,

Li²

2022

Nano Research Energy

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“…At photocathode/electrolyte interfaces, built-in potential is generated at the space charge region due to band-bending in the energy structure of semiconductors. Especially, suppressing defect sites is one of the key strategies in improving the photoelectrochemical reaction efficiency because these are related to electron–hole recombination at semiconductor electrodes. − …”

Section: Introductionmentioning

confidence: 99%

CuInS₂ Photocathodes with Atomic Gradation-Controlled (Ta,Mo)_x(O,S)_y Passivation Layers for Efficient Photoelectrochemical H₂ Production

Chae

Kim

Park

et al. 2021

ACS Appl. Mater. Interfaces

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An atomic gradient passivation layer, (Ta,Mo) x (O,S) y , is designed to improve the charge transportation and photoelectrochemical activity of CuInS2-based photoelectrodes. We found that Mo spontaneously diffused to the a-TaO x layer during e-beam evaporation. This result indicates that the gradient profile of MoO x /TaO x is formed in the sublayer of (Ta,Mo) x (O,S) y . To understand the atomic-gradation effects of the (Ta,Mo) x (O,S) y passive layer, the composition and (photo)electrochemical properties have been characterized in detail. When this atomic gradient-passive layer is applied to CuInS2-based photocathodes, promising photocurrent and onset potential are seen without using Pt cocatalysts. This is one of the highest activities among reported CuInS2 photocathodes, which are not combined with noble metal cocatalysts. Excellent photoelectrochemical activity of the photoelectrode can be mainly achieved by (1) the electron transient time improved due to the conductive Mo-incorporated TaO x layer and (2) the boosted electrocatalytic activity by Mo x (O,S) y formation.

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“…Therefore, using oxygen-vacant Mn 3 O 4 as the only catalyst component to achieve high-yield FA from FF is a promising strategy. However, the reported routes of oxygen vacancy creation , and the preparation of Mn 3 O 4 nanoparticles − are both quite demanding. Hence, Mn 3 O 4 with oxygen vacancies prepared in a facile way is anticipated.…”

Section: Introductionmentioning

confidence: 99%

“…19 Therefore, using oxygen-vacant Mn 3 O 4 as the only catalyst component to achieve high-yield FA from FF is a promising strategy. However, the reported routes of oxygen vacancy creation 20,21 and the preparation of Mn 3 O 4 nanoparticles 22−24 oxygen vacancies prepared in a facile way is anticipated. The calcination of organometallic salts is an easy way to obtain oxygen-vacant metal oxides 25 and induce metal valence electronic configurations to acquire various metal oxides.…”

Section: ■ Introductionmentioning

confidence: 99%

Facile Preparation of Oxygen-Vacancy-Mediated Mn₃O₄ for Catalytic Transfer Hydrogenation of Furfural

Chen

Lin

et al. 2021

Ind. Eng. Chem. Res.

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The conversion of biobased furfural (FF) into furfuryl alcohol (FA) has immense industrial significance; however, the catalyst preparation methods for the conversion of FF to FA are demanding. We demonstrated a facile method, direct calcination of manganese(II) acetate tetrahydrate, to prepare an oxygen-vacant Mn 3 O 4 catalyst for the catalytic transfer hydrogenation (CTH) of FF to FA. The characterization results of oxygen-vacant Mn 3 O 4 along with commercial and conventional Mn 3 O 4 indicate that surface oxygen vacancies, strong acid−base properties, and a porous structure facilitate the high yield of FA (>99%) obtained from FF at 220 °C for 4 h in isopropanol. The oxygen vacancy-mediated Mn 3 O 4 could be reused five times without noticeable activity loss. Moreover, we confirmed that Mn 3 O 4 obtained from various manganese(II) salts by the direct calcination method also exhibited good performance for the CTH of FF to FA.

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Synergetic integration of passivation layer and oxygen vacancy on hematite nanoarrays for boosted photoelectrochemical water oxidation

Cited by 46 publications

References 45 publications

Recent research progress on operational stability of metal oxide/sulfide photoanodes in photoelectrochemical cells

Recent research progress on operational stability of metal oxide/sulfide photoanodes in photoelectrochemical cells

CuInS₂ Photocathodes with Atomic Gradation-Controlled (Ta,Mo)_x(O,S)_y Passivation Layers for Efficient Photoelectrochemical H₂ Production

Facile Preparation of Oxygen-Vacancy-Mediated Mn₃O₄ for Catalytic Transfer Hydrogenation of Furfural

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Synergetic integration of passivation layer and oxygen vacancy on hematite nanoarrays for boosted photoelectrochemical water oxidation

Cited by 46 publications

References 45 publications

Recent research progress on operational stability of metal oxide/sulfide photoanodes in photoelectrochemical cells

Recent research progress on operational stability of metal oxide/sulfide photoanodes in photoelectrochemical cells

CuInS2 Photocathodes with Atomic Gradation-Controlled (Ta,Mo)x(O,S)y Passivation Layers for Efficient Photoelectrochemical H2 Production

Facile Preparation of Oxygen-Vacancy-Mediated Mn3O4 for Catalytic Transfer Hydrogenation of Furfural

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Product

Resources

About

CuInS₂ Photocathodes with Atomic Gradation-Controlled (Ta,Mo)_x(O,S)_y Passivation Layers for Efficient Photoelectrochemical H₂ Production

Facile Preparation of Oxygen-Vacancy-Mediated Mn₃O₄ for Catalytic Transfer Hydrogenation of Furfural