Improved charge separation via Fe-doping of copper tungstate photoanodes

2015 ◽  
Vol 17 (15) ◽  
pp. 9857-9866 ◽  
Author(s):  
Divya Bohra ◽  
Wilson A. Smith
Keyword(s):  
Water Splitting ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Fe Doping ◽  
Solar Water ◽  
Solar Water Splitting ◽  
New Methods ◽  
Copper Tungstate ◽  
Charge Separation Efficiency ◽  
Conversion Efficiencies

By doping CuWO4 photoanodes with Fe, the charge separation efficiency and incident photon-to-current conversion efficiencies have increased dramatically, leading to improvements in the fundamentally limiting processes in this material. These results offer new methods and insights into improved solar water splitting photoelectrodes.

Spatial engineering of a Co(OH)x encapsulated p-Cu2S/n-BiVO4 photoanode: simultaneously promoting charge separation and surface reaction kinetics in solar water splitting

2019 ◽  
Vol 7 (12) ◽  
pp. 6747-6752 ◽  
Author(s):  
Bing He ◽  
Yang Wang ◽  
Xueqin Liu ◽  
Yinchang Li ◽  
Xiaoqin Hu ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Water Splitting ◽  
Charge Separation ◽  
Surface Reaction ◽  
Separation Efficiency ◽  
Photocurrent Density ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Charge Separation Efficiency ◽  
Surface Reaction Kinetics

An ultrathin Co(OH)x coated p-Cu2S/n-BiVO4 heterojunction photoanode with improved charge separation efficiency was prepared, showing a photocurrent density of 3.51 mA cm−2.

Surface Engineering of Metal Oxide Photoelectrodes for Improved Band Alignment in Solar Water Splitting Cells

2016 ◽  
Vol 879 ◽  
pp. 832-837 ◽  
Author(s):  
Soong Leong Sim ◽  
Ye Ru Liu ◽  
Ying Woan Soon ◽  
James Robert Jennings
Keyword(s):  
Metal Oxide ◽  
Water Splitting ◽  
Charge Separation ◽  
Diffusion Length ◽  
Separation Efficiency ◽  
Electron Diffusion ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Charge Separation Efficiency ◽  
Electron Diffusion Length

Several earth-abundant transition-metal oxides (e.g. Fe2O3, CoO, and Cu2O) possessing suitable band gaps for solar water splitting exist, but energy level alignment is often sub-optimal, i.e. the conduction and valence bands do not straddle the water oxidation and reduction potentials. Here, using a nanocrystalline-TiO2-based photoelectrochemical cell as a model system, we investigate the effect of tuning the semiconductor energy levels by adding Li+ ions to the electrolyte. The effect of LiClO4 addition on band edges, interfacial recombination resistance, electron diffusion length, and charge-separation efficiency were quantified by impedance spectroscopy and analysis of incident photon-to-current efficiency spectra. We find that the TiO2 band edges are shifted toward positive potentials by the addition of Li+, and that this increases the apparent electron diffusion length without affecting the charge-separation efficiency, most likely due to a change in the driving force for O2 reduction. These results should prove useful in the modeling and optimization of solar water splitting cells employing metal oxide photoelectrodes.

Novel Black BiVO 4 /TiO 2− x Photoanode with Enhanced Photon Absorption and Charge Separation for Efficient and Stable Solar Water Splitting

2019 ◽  
Vol 9 (27) ◽  
pp. 1901287 ◽  
Author(s):  
Zhangliu Tian ◽  
Pengfei Zhang ◽  
Peng Qin ◽  
Du Sun ◽  
Shaoning Zhang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Charge Separation ◽  
Photon Absorption ◽  
Solar Water ◽  
Solar Water Splitting

scholarly journals Recent Advances of Metal‐Oxide Photoanodes: Engineering of Charge Separation and Transportation toward Efficient Solar Water Splitting

Solar RRL ◽  
2020 ◽  
Vol 4 (8) ◽  
pp. 1900509 ◽  
Author(s):  
Mu Xiao ◽  
Bin Luo ◽  
Zhiliang Wang ◽  
Songcan Wang ◽  
Lianzhou Wang
Keyword(s):  
Metal Oxide ◽  
Water Splitting ◽  
Charge Separation ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Recent Advances

scholarly journals Enhanced Solar Water Splitting by Swift Charge Separation in Au/FeOOH Sandwiched Single-Crystalline Fe2 O3 Nanoflake Photoelectrodes

ChemSusChem ◽  
2017 ◽  
Vol 10 (13) ◽  
pp. 2720-2727 ◽  
Author(s):  
Lei Wang ◽  
Nhat Truong Nguyen ◽  
Yajun Zhang ◽  
Yingpu Bi ◽  
Patrik Schmuki
Keyword(s):  
Water Splitting ◽  
Charge Separation ◽  
Single Crystalline ◽  
Solar Water ◽  
Solar Water Splitting

scholarly journals Efficient solar water splitting by enhanced charge separation in a bismuth vanadate-silicon tandem photoelectrode

2013 ◽  
Vol 4 (1) ◽  
Author(s):  
Fatwa F. Abdi ◽  
Lihao Han ◽  
Arno H. M. Smets ◽  
Miro Zeman ◽  
Bernard Dam ◽  
...  
Keyword(s):  
Water Splitting ◽  
Charge Separation ◽  
Bismuth Vanadate ◽  
Solar Water ◽  
Solar Water Splitting

Ferroelectric enhanced Z-scheme P-doped g-C3N4/PANI/BaTiO3 ternary heterojunction with boosted visible-light photocatalytic water splitting

2019 ◽  
Vol 43 (17) ◽  
pp. 6753-6764 ◽  
Author(s):  
Qiannan Li ◽  
Yuguo Xia ◽  
Kangliang Wei ◽  
Xiaotong Ding ◽  
Shun Dong ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Water Splitting ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Photocatalytic Water Splitting ◽  
Surface Polarization ◽  
Production Activity ◽  
Charge Separation Efficiency ◽  
Visible Light Photocatalytic

Surface polarization promotes the charge separation efficiency of PCN/PANI/BTO ternary heterojunction, resulting in an enhanced visible-light photocatalytic hydrogen production activity.

Photoelectrochemical Solar Water Splitting: The Role of the Carbon Nanomaterials in Bismuth Vanadate Composite Photoanodes toward Efficient Charge Separation and Transport

Langmuir ◽  
2019 ◽  
Vol 35 (45) ◽  
pp. 14492-14504 ◽  
Author(s):  
Jyoti Prakash ◽  
Umesh Prasad ◽  
Rajath Alexander ◽  
Jitendra Bahadur ◽  
Kinshuk Dasgupta ◽  
...  
Keyword(s):  
Water Splitting ◽  
Charge Separation ◽  
Carbon Nanomaterials ◽  
Bismuth Vanadate ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Efficient Charge
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