A Ni2P modified Ti4+ doped Fe2O3 photoanode for efficient solar water oxidation by promoting hole injection

Bu, Qijing; Li, Shuo; Cao, Shuang; Zhao, Qidong; Chen, Yong; Wang, Dejun

doi:10.1039/c7dt00861a

Cited by 30 publications

(25 citation statements)

References 34 publications

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“…Transient photovoltage technique is an effectual method to study the dynamic characteristics of charge transfer behavior, as it could provide the information of carrier generation, separation, and recombination . In detail, under the light irradiation, electrons and holes are excited and gather together at the surface of photocatalyst at the first stage, and therefore the transient photovoltage increases rapidly.…”

Section: Resultsmentioning

confidence: 99%

Construction of Self‐Healing Internal Electric Field for Sustainably Enhanced Photocatalysis

Dai

Chen

et al. 2019

Adv Funct Materials

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The construction of internal electric field is generally considered an effective strategy to enhance photocatalytic performance due to its significant role in charge separation. However, static internal electric field is prone to be saturated either by inner or outer shield effect, and thus its effect on the improvement of photocatalysis can easily vanish. Here, the self-healing internal electric field is proposed and successfully endowed to a designed helical structural composite microfiber polyvinylidene fluoride/g-C 3 N 4 (PVDF/g-C 3 N 4 ) based on the bioinspired simple harmonic vibration. Importantly, the saturation and recovery of internal electric field are characterized by transient photovoltage and photoluminescence. The results indicate that the internal electric field could be saturated within about 10 min and refreshed with the assistance of rebuilt piezoelectric potential. The lifetime of photogenerated carriers is about 10 −4 s and the number of effective carriers is greatly increased in the presence of self-healing internal electric field. The results provide direct experimental evidence on the role of self-healing internal electric field in charge transfer behavior. This work represents a new design strategy of photocatalysts, and it may open up new horizons for solving energy shortage and environmental issues.

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Section: Resultsmentioning

confidence: 99%

Construction of Self‐Healing Internal Electric Field for Sustainably Enhanced Photocatalysis

Dai

Chen

et al. 2019

Adv Funct Materials

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“…Very recently, Bu et al. introduced Ni 2 P NPs as an outstanding water oxidation co‐catalyst for a Ti 4+ ‐doped Fe 2 O 3 photoanode . The Ni 2 P NPs were deposited on the surface of Ti–Fe 2 O 3 by a simple drop‐casting method and the Ti–Fe 2 O 3 /Ni 2 P photoanode demonstrated a three times enhancement in water oxidation photocurrent density at 1.23 V vs. RHE.…”

Section: Photoelectrocatalysts For H2 Evolutionmentioning

confidence: 99%

Section: Mechanistic Proposalmentioning

confidence: 99%

Metal Phosphides as Co‐Catalysts for Photocatalytic and Photoelectrocatalytic Water Splitting

et al. 2017

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Solar‐to‐hydrogen conversion based on photocatalytic and photoelectrocatalytic water splitting is considered as a promising technology for sustainable hydrogen production. Developing earth‐abundant H2‐production materials with robust activity and stability has become the mainstream in this field. Due to the unique properties and characteristics, transition metal phosphides (TMPs) have been proven to be high performance co‐catalysts to replace some of the classic precious metal materials in photocatalytic water splitting. In this Minireview, we summarize the recent significant progress of TMPs as cocatalysts for water splitting reaction with high activity and stability. Firstly, the characteristic of TMPs is briefly introduced. Then, we mainly discuss the recent research efforts toward their application as photocatalytic co‐catalysts in photocatalytic H2‐production, O2‐evolution and photoelectrochemical water splitting. Finally, the catalytic mechanism, current existing challenges and future working directions for improving the performance of TMPs are proposed.

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“…introduced Ni 2 PN Ps as an outstanding water oxidation co-catalyst for aT i 4 + -dopedF e 2 O 3 photoanode. [105] The Ni 2 PN Ps were deposited on the surfaceo fT i-Fe 2 O 3 by as imple drop-casting methoda nd the Ti-Fe 2 O 3 /Ni 2 P photoanode demonstrated at hree times enhancement in water oxidation photocurrent density at 1.23 Vv s. RHE. In light of surface photovoltage (SPV) spectroscopy and open-circuit photovoltage (OPV) results, they concluded that the Ni 2 PN Ps could effectively promote the hole-injection efficiency and suppress the backr eaction of the water oxidation reaction.…”

Section: Photoelectrocatalysts For H 2 Evolutionmentioning

confidence: 99%

“…In conclusion, this Minireview has summarized the application of TMPs as co-catalysts in photocatalytic water splitting reactions. Recently, TMPs have been explored as an excellent catalyst for HERe lectrocatalysis in aw idep Hr ange and have at- [56] and [105].Copyright 2014 and 2008, respectively, American Chemical Society. ChemSusChem 2017, 10,4306 -4323 www.chemsuschem.org tracted much attention.F urthermore, variouss tudies during the past three years have concernedt heir use as co-catalysts for photocatalytic water splitting.…”

Section: Summary and Prospectsmentioning

confidence: 99%

Metal Phosphides as Co‐Catalysts for Photocatalytic and Photoelectrocatalytic Water Splitting

Cao

Wang

et al. 2017

ChemSusChem

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A Ni₂P modified Ti⁴⁺ doped Fe₂O₃ photoanode for efficient solar water oxidation by promoting hole injection

Abstract: Nickel phosphide (NiP) was used as an excellent water oxidation cocatalyst for photoelectrochemical (PEC) water splitting, which could significantly promote the hole injection efficiency and suppress the back reaction of water oxidation over a Ti doped FeO photoanode.

Cited by 30 publications

References 34 publications

Construction of Self‐Healing Internal Electric Field for Sustainably Enhanced Photocatalysis

Construction of Self‐Healing Internal Electric Field for Sustainably Enhanced Photocatalysis

Metal Phosphides as Co‐Catalysts for Photocatalytic and Photoelectrocatalytic Water Splitting

Metal Phosphides as Co‐Catalysts for Photocatalytic and Photoelectrocatalytic Water Splitting

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