A graphene oxide–molecular Cu porphyrin-integrated BiVO<sub>4</sub> photoanode for improved photoelectrochemical water oxidation performance

Xu, Chunjiang; Sun, Wanjun; Dong, Yu; Dong, Congzhao; Hu, Qiyu; Ma, Baochun; Ding, Yong

doi:10.1039/c9ta13452b

Cited by 71 publications

(50 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The O 1s spectrum is deconvoluted into three peaks of 529.5 eV, 530.8 eV, and 531.7 eV, which are assigned to O 2− , OH − , and the bound water (H−O−H), respectively (Figure 1c). The area ratio of OH − to O 2− is close to the theoretical ratio for hydroxide, confirming the presence of FeOOH [16] . Based on the XPS and ATR−FTIR analysis, FeOOH and molecular catalyst Ru(bda)(vpy) were successfully immobilized on the surface of Fe 2 O 3 .…”

Section: Methodssupporting

confidence: 71%

A semiconductor/molecular catalyst hybrid photoanode with FeOOH as an electron transfer relay

Zhao

Liu

Zhu

et al. 2021

Chemistry An Asian Journal

View full text Add to dashboard Cite

A Fe2O3/FeOOH/poly‐Ru(bda)(vpy) (bda = 2,2’‐bipyridine‐6,6’‐dicarboxylate,vpy = 4‐vinylpyridine) photoanode has been fabricated by electropolymerization of molecular Ru(bda)(vpy) catalyst on FeOOH modified Fe2O3, in which a thin layer of FeOOH replicates the role of tyrosine residue in PSII as an efficient electron transfer mediator. The ternary hybrid photoanode produced a 2.4 times higher photocurrent density than that of previously reported Fe2O3/poly‐Ru(bda)(vpy) under AM 1.5 G illumination and displayed a negative shift on the onset potential by 100 mV. In addition, the Fe2O3/FeOOH/poly‐Ru(bda)(vpy) exhibited long‐term stability for at least 10 h with a Faraday efficiency of ∼96%. The high performance shown here was attributed to the improved charge separation between excited semiconductor and the catalyst caused by FeOOH mediated electron transfer on the electrode surface.

show abstract

Section: Methodssupporting

confidence: 71%

A semiconductor/molecular catalyst hybrid photoanode with FeOOH as an electron transfer relay

Zhao

Liu

Zhu

et al. 2021

Chemistry An Asian Journal

View full text Add to dashboard Cite

show abstract

“…[255] Through density functional theory calculations and experimental studies, it showed that the doping of Fe atoms into the lattice of CoO x produced abundant oxygen vacancies, which significantly improved the interfacial hole injection property of BiVO 4 and reduced the OER onset potential (Figure 19d). Recently, many other advanced co-catalysts have been demonstrated with outstanding performance and stability, such as natural polyphenols/Fe ion, [256] Cu porphyrin, [257] Fe-based (Ni 1−x Fe x and Co 1−x Fe x ) layered double hydroxide, [258][259][260][261] InPO x , [86] molecular Co Cubane, [262] MnO 2 , [263][264][265] and Co 8 -polyoxometalates. [266] In Table 4, it can be seen that by modifying pristine semiconductors with co-catalyst, boosted PEC performance can be achieved due to the significantly enhanced interfacial hole-injection efficiency.…”

Section: Co-catalyst Developmentmentioning

confidence: 99%

Engineering Nanostructure–Interface of Photoanode Materials Toward Photoelectrochemical Water Oxidation

et al. 2021

View full text Add to dashboard Cite

In practical applications, solar energy is usually converted to other forms of energy, such as electric energy, [9][10][11] chemical energy, [12,13] thermal energy, [14,15] so as to facilitate further transportation and storage. Among them, photoelectrochemical (PEC) reactions from water to hydrogen, CO 2 to C2+ products, and N 2 to NH 3 in the aqueous-based environment have been considered to be quite promising solar-chemical energy conversion pathways. [16][17][18][19] Unlike the traditional water electrolyzing system, the most ideal PEC reaction system can be selfdriven by illumination without external bias. Utilizing the electron-hole carriers generated from the semiconductor photoelectrode, redox reactions take place separately on the photocathode and photoanode. However, as the water oxidation reaction involves a complex four-proton coupled multi-electron process (2H 2 O + 4h + → O 2 + 4H + , E o = 1.23 V vs reversible hydrogen electrode (RHE)), it makes the water oxidation reaction the rate-control step in the watersplitting reaction. [20] Therefore, developing high-performance photo anodes is of great fundamental importance and interest.At the present stage, TiO 2 is the most studied and applied semiconductor photoelectrocatalyst, due to its outstanding chemical stability. [21][22][23] However, as a wide bandgap semiconductor (anatase TiO 2 : 3.2eV, rutile TiO 2 : 3.0 eV), TiO 2 can only respond to the ultraviolet light. Meanwhile, as an intrinsic semiconductor, the bulk/surficial carrier recombination of TiO 2 greatly hinders its practical application. [24][25][26][27] In that case, some narrow bandgap semiconductors are also applied as the photoanode materials, such as Ta 3 N 5 (bandgap 2.1 eV), [28,29] BiVO 4 (bandgap 2.4 eV), and α-Fe 2 O 3 (bandgap 2.1 eV). [30][31][32] However, many of these narrow bandgap materials suffer from poor chemical stability and sluggish interfacial charge injection. [33][34][35] As intrinsic semiconductor materials, both wide and narrow bandgap semiconductor photoanode materials are suffering from the poor bulk-phase carrier separation, intense surficial e − /h + trapping recombination, and sluggish electrode/electrolyte carrier injection kinetics. [36][37][38][39] Fortunately, with the continuous investment of researchers, a series of modification methods have been established and the PEC water oxidation performance of semiconductor photoanode materials has been significantly improved. [32,[40][41][42][43][44] Among various strategies, nanostructure-interface engineering is widely regarded as an effective method to improve the PEC water oxidation performance: [40,41] the light-harvesting performance can be enhanced by the widened optical Photoelectrochemical (PEC) water oxidation based on semiconductor materials plays an important role in the production of clean fuel and value-added chemicals. Nanostructure-interface engineering has proven to be an effective way to construct highly efficient PEC water oxidation photoanodes with good light capture, carrier transport, and ...

show abstract

“…However, they typically lose the ability to catalyze decomposition of water into O 2 and H 2 as a result of the downward shift of their conduction band edge, consisting of a d‐orbital, where the evolution of H 2 from H + is expected to occur [13–15] . Bismuth vanadium oxide (BiVO 4 ) is a type of metal oxide, which has been applied as a photoanode for the evolution of O 2 from water [16–20] . Hence, in the prototype comprising a BiVO 4 photoanode (cf.…”

Section: Introductionmentioning

confidence: 99%

A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

et al. 2020

View full text Add to dashboard Cite

In the water‐splitting reaction, the oxidation of water to O2 is considered to be a kinetically demanding process, so that a co‐catalyst has been usually applied to promote water oxidation. This work demonstrates that, when loading mixed‐valence cobalt (II,III) oxide (Co3O4) dispersed in a Nafion membrane (Nf) on a nanoporous bismuth vanadate (BiVO4) photoanode (i. e., BiVO4/Nf[Co3O4]), stable and efficient water oxidation occurred. In particular, it is noteworthy that the BiVO4/Nf[Co3O4] photoanode exhibited stable performance even in an acidic medium (pH=2). In the present system consisting of a BiVO4/Nf[Co3O4] photoanode along with an organo‐photocathode, the stoichiometric formation of O2 and H2 successfully occurred by applying just 0.1 V between the photoelectrodes (cf. maximum efficiency, ca. 0.2 %), which was superior to the prototype comprising BiVO4 and Pt counter electrode. The Co3O4 loading can effectively suppress the collapse of the nanostructured BiVO4 upon photocorrosion, resulting in the stable and kinetically efficient consumption of holes in BiVO4.

show abstract

A graphene oxide–molecular Cu porphyrin-integrated BiVO₄ photoanode for improved photoelectrochemical water oxidation performance

Abstract: Monoclinic bismuth vanadate (BiVO4), as a rising star in light-catching materials, has been researched in many fields, such as photoelectrochemical water splitting.

Cited by 71 publications

References 45 publications

A semiconductor/molecular catalyst hybrid photoanode with FeOOH as an electron transfer relay

A semiconductor/molecular catalyst hybrid photoanode with FeOOH as an electron transfer relay

Engineering Nanostructure–Interface of Photoanode Materials Toward Photoelectrochemical Water Oxidation

A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

Contact Info

Product

Resources

About

A graphene oxide–molecular Cu porphyrin-integrated BiVO4 photoanode for improved photoelectrochemical water oxidation performance

Abstract: Monoclinic bismuth vanadate (BiVO4), as a rising star in light-catching materials, has been researched in many fields, such as photoelectrochemical water splitting.

Cited by 71 publications

References 45 publications

A semiconductor/molecular catalyst hybrid photoanode with FeOOH as an electron transfer relay

A semiconductor/molecular catalyst hybrid photoanode with FeOOH as an electron transfer relay

Engineering Nanostructure–Interface of Photoanode Materials Toward Photoelectrochemical Water Oxidation

A Water‐Splitting System with a Cobalt (II,III) Oxide Co‐Catalyst‐Loaded Bismuth Vanadate Photoanode Along with an Organo‐Photocathode

Contact Info

Product

Resources

About

A graphene oxide–molecular Cu porphyrin-integrated BiVO₄ photoanode for improved photoelectrochemical water oxidation performance