X-ray absorption fine structure study of amorphous metal oxide thin films prepared by photochemical metalorganic deposition

Trudel, Simon; Crozier, E. D.; Gordon, R. A.; Budnik, P. S.; Hill, Ross H.

doi:10.1016/j.jssc.2011.03.015

Cited by 33 publications

(51 citation statements)

References 94 publications

(133 reference statements)

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“…The peak of IG6 is ill defined and broadened due to its low crystallinity 33, 34. The 1s→3d pre‐edge is normally forbidden, but it is observed experimentally due to the electric quadrupole coupling 34–36. The pre‐edge position is a sensitive indicator of the relative fraction of Fe 2+ and Fe 3+ ,33, 34, 37 and it is shown in the inset of Figure 2a.…”

Section: Resultsmentioning

confidence: 97%

“…The 1s→3d pre‐edge is normally forbidden, but it is observed experimentally due to the electric quadrupole coupling 34–36. The pre‐edge position is a sensitive indicator of the relative fraction of Fe 2+ and Fe 3+ ,33, 34, 37 and it is shown in the inset of Figure 2a. The gap of pre‐edge positions of commercial Fe 2 O 3 and Fe 3 O 4 is smaller than that reported in the literature while the pre‐edge position of commercial Fe 3 O 4 is higher.…”

Section: Resultsmentioning

confidence: 97%

“…637106 from Aldrich) powders were used as references. The peak of IG6 is ill defined and broadened due to its low crystallinity 33, 34. The 1s→3d pre‐edge is normally forbidden, but it is observed experimentally due to the electric quadrupole coupling 34–36.…”

Section: Resultsmentioning

confidence: 99%

“…The gap of pre‐edge positions of commercial Fe 2 O 3 and Fe 3 O 4 is smaller than that reported in the literature while the pre‐edge position of commercial Fe 3 O 4 is higher. This effect could be attributed to partial oxidation on the surface of the nano‐sized commercial Fe 3 O 4 33, 34. The positions of pre‐edge peaks are obtained from derivatives of the Fe K‐edge profiles.…”

Section: Resultsmentioning

confidence: 99%

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 97%

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confidence: 99%

Section: Resultsmentioning

confidence: 99%

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“…The graded Mo:BiVO 4 has been previously reported for improving diffusion length and charge separation . The PMOD method was previously demonstrated as an effective technique to produce active transition‐metal‐based amorphous electrocatalyst for water oxidation . Here, modification of photoanode by NiO x offers several improvements over the unmodified one.…”

Section: Introductionmentioning

confidence: 94%

Understanding the Roles of NiO_x in Enhancing the Photoelectrochemical Performance of BiVO₄ Photoanodes for Solar Water Splitting

et al. 2018

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Solar water oxidation is considered as a promising method for efficient utilization of solar energy and bismuth vanadate (BiVO4) is a potential photoanode. Catalyst loading on BiVO4 is often used to tackle the limitations of charge recombination and sluggish kinetics. In this study, amorphous nickel oxide (NiOx) is loaded onto Mo‐doped BiVO4 by photochemical metal–organic deposition method. The resulting NiOx/Mo:BiVO4 photoanodes demonstrate a two‐fold improvement in photocurrent density (2.44 mA cm−2) at 1.23 V versus reversible hydrogen electrode (RHE) compared with the uncatalyzed samples. After NiOx modification the charge‐separation and charge‐transfer efficiencies improve significantly across the entire potential range. It is further elucidated by open‐circuit photovoltage (OCP), time‐resolved‐microwave conductivity (TRMC), and rapid‐scan voltammetry (RSV) measurements that NiOx modification induces larger band bending and promotes efficient charge transfer on the surface of BiVO4. This work provides insight into designing BiVO4‐catalyst assemblies by using a simple surface‐modification route for efficient solar water oxidation.

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Supervariate Ceramics: Gelatinous and Monolithic Ceramics Fabricated under Ambient Conditions

et al. 2021

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Ceramics are normally fabricated by firing compacted raw powders at high temperatures. Herein, a general mechanism for directly fabricating ceramic objects at the centimeter scale from ceramic gels at room temperature and ambient pressure is disclosed—all by simply mixing precursor solutions of multiple metal salts/ionic compounds to afford a supervariate system. Upon drying, the supervariate ceramic gels convert into monolithic ceramic materials to deliver excellent mechanical properties, e.g., a hardness/reduced elastic modulus (H/E r) of 1.2/26 GPa. Furthermore, the room temperature‐dried ceramics are tolerant to high‐temperature annealing at 1500 oC, staying intact and achieving further enhanced H/E r (e.g., 11.7/132 GPa). By utilizing the supervariate strategy, ceramics can be casted or molded like metals or polymers under mild conditions, offering great convenience to achieve desirable mechanical performances and functionalities.

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X-ray absorption fine structure study of amorphous metal oxide thin films prepared by photochemical metalorganic deposition

Cited by 33 publications

References 94 publications

Structure‐Properties Relationship in Iron Oxide‐Reduced Graphene Oxide Nanostructures for Li‐Ion Batteries

Structure‐Properties Relationship in Iron Oxide‐Reduced Graphene Oxide Nanostructures for Li‐Ion Batteries

Understanding the Roles of NiO_x in Enhancing the Photoelectrochemical Performance of BiVO₄ Photoanodes for Solar Water Splitting

Supervariate Ceramics: Gelatinous and Monolithic Ceramics Fabricated under Ambient Conditions

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X-ray absorption fine structure study of amorphous metal oxide thin films prepared by photochemical metalorganic deposition

Cited by 33 publications

References 94 publications

Structure‐Properties Relationship in Iron Oxide‐Reduced Graphene Oxide Nanostructures for Li‐Ion Batteries

Structure‐Properties Relationship in Iron Oxide‐Reduced Graphene Oxide Nanostructures for Li‐Ion Batteries

Understanding the Roles of NiOx in Enhancing the Photoelectrochemical Performance of BiVO4 Photoanodes for Solar Water Splitting

Supervariate Ceramics: Gelatinous and Monolithic Ceramics Fabricated under Ambient Conditions

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Understanding the Roles of NiO_x in Enhancing the Photoelectrochemical Performance of BiVO₄ Photoanodes for Solar Water Splitting