scholarly journals Computational Electrochemistry of Water Oxidation on Metal‐Doped and Metal‐Supported Defective h‐BN

ChemSusChem ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1995-2007 ◽  
Author(s):  
Daniele Perilli ◽  
Daniele Selli ◽  
Hongsheng Liu ◽  
Cristiana Di Valentin
Keyword(s):  
Water Oxidation ◽  
Computational Electrochemistry ◽  
Metal Doped

Photocatalytic and Photoelectrochemical Water Oxidation over Metal-Doped Monoclinic BiVO4Photoanodes

ChemSusChem ◽  
2012 ◽  
Vol 5 (10) ◽  
pp. 1926-1934 ◽  
Author(s):  
Kanak Pal Singh Parmar ◽  
Hyun Joon Kang ◽  
Amita Bist ◽  
Piyush Dua ◽  
Jum Suk Jang ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Metal Doped ◽  
Photoelectrochemical Water Oxidation

Microwave-Assisted Hydrothermal Synthesis of Transition Metal Doped ZnO Nanoparticles and Their Electrocatalytic Activity for Water Oxidation

2020 ◽  
Vol MA2020-01 (37) ◽  
pp. 1561-1561
Author(s):  
Nobuyuki Nishiumi ◽  
Yuya Harada ◽  
He Sun ◽  
Hidenobu Shiroishi ◽  
Yuta Matsushima ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Transition Metal ◽  
Zno Nanoparticles ◽  
Water Oxidation ◽  
Electrocatalytic Activity ◽  
Microwave Assisted ◽  
Doped Zno ◽  
Metal Doped

scholarly journals Efficient Photoelectrochemical Water Oxidation by Metal-Doped Bismuth Vanadate Photoanode with Iron Oxyhydroxide Electrocatalyst

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Eun Jin Joo ◽  
Gisang Park ◽  
Ji Seon Gwak ◽  
Jong Hyeok Seo ◽  
Kyu Yeon Jang ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Chemical Deposition ◽  
Iron Oxyhydroxide ◽  
Grain Sizes ◽  
System A ◽  
Conductive Film ◽  
Metal Doped ◽  
Splitting System ◽  
Porous Morphology ◽  
Photoelectrochemical Water Oxidation

Intensive attention has been currently focused on the discovery of semiconductor and proficient cocatalysts for eventual applications to the photoelectrochemical water splitting system. A W-Mo-doped BiVO4semiconductor was prepared by the surfactant-assisted thermal decomposition method on a fluorine-doped tin oxide conductive film. The W-Mo-doped BiVO4films showed a porous morphology with the grain sizes of about 270 nm. Because the hole diffusion length of BiVO4is about 100 nm, the W-Mo-doped BiVO4film in this study is an ideal candidate for the photoelectrochemical water oxidation. Iron oxyhydroxide (FeOOH) electrocatalyst was chemically deposited on the W-Mo-doped BiVO4to investigate the effect of the electrocatalyst on the semiconductor. The W-Mo-doped BiVO4/FeOOH composite electrode showed enhanced activity compared to the pristine W-Mo-doped BiVO4electrode for water oxidation reaction. The chemical deposition is a promising method for the deposition of FeOOH on semiconductor.

Metal Doped TiO2 Photocatalysts for CO2 Photoreduction

2013 ◽  
Vol 757 ◽  
pp. 243-256 ◽  
Author(s):  
Amir Al-Ahmed
Keyword(s):  
Chemical Reactions ◽  
Water Oxidation ◽  
Active Species ◽  
Electron Hole ◽  
Highly Active ◽  
Redox Active ◽  
Recent Developments ◽  
Metal Doped ◽  
Generate Electron ◽  
Hole Recombination

Greenhouse gases such as CO2, CH4 and CFCs are the primary causes of global warming. Worldwide, people are exploring techniques to reduce, capture, store CO2 gas and even convert this gas in to some useful chemicals. CO2 can be transformed into hydrocarbons in a photocatalytic reaction. The advantage of photo reduction of CO2 is to use inexhaustible solar energy. Knowledge of elementary steps in photocatalytic CO2 reduction under UV irradiation is required in order to improve the photo efficiency of the photocatalyst. A semiconductor photocatalyst mediating CO2 reduction and water oxidation needs to absorb light energy, generate electron hole pairs, spatially separate them, transfer them to redox active species across the interface and minimize electron hole recombination. This requires the semiconductor to have its conduction band electrons at higher energy compared to the CO2 reduction potential while the holes in the valence band need to be able to oxidize water to O2. A single semiconductor does not usually satisfy these requirements. Some recent developments in this field have been moves towards rational photocatalyst design, the use of highly active isolated Ti-species in mesoporous and microporous materials, metal-doping of TiO2, development of catalysts active at longer wavelengths than can be achieved with commercially available titania etc. The use of transition-metal loaded titanium dioxide (TiO2) has been extensively studied as a photocatalyst in photoreactions. Unlike traditional catalysts drive chemical reactions by thermal energy, semiconducting photocatalysts can induce chemical reactions by inexhaustible sunlight and convert CO2 in to the useful hydrocarbons. In this review article we will cover different aspects of metal doped nano structured TiO2 photocatalysts, used to convert/reduce CO2 in to useful hydrocarbons.

scholarly journals Towards stable and highly active IrO2 catalysts supported on doped tin oxides for the oxygen evolution reaction in acidic media

2022 ◽  
Vol 334 ◽  
pp. 03001
Author(s):  
Sofia Delgado ◽  
Paranjeet Lakhtaria ◽  
Eva Sousa ◽  
Tiago Lagarteira ◽  
K.A. Friedrich ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Large Scale ◽  
Proton Exchange Membrane ◽  
Active Surface ◽  
Proton Exchange ◽  
Polyol Synthesis ◽  
Surface Areas ◽  
Highly Active ◽  
Tin Oxides ◽  
Metal Doped

Iridium oxide is the preferred catalyst for water oxidation but it is required to maximize its utilization to deploy Proton Exchange Membrane Water Electrolyzers (PEMWEs) into the large-scale applications panorama. A promising pathway for dispersing this precious catalyst is on an electric conductive and stable support. However, there is a lack of understanding how the support-catalyst interactions affect the stability/activity of the electrocatalyst under anodic conditions. This work discloses a modified, easy-scalable, polyol synthesis protocol to produce a highly active and stable iridium-based catalyst, supported on metal-doped tin oxides. The loading of Ir was reduced 30 wt.% compared to the reference IrO2, and dispersed on Sb-SnO2 (IrOx/ATO), In-SnO2 (IrOx/ITO) and SnO2 supports. All synthesized electrocatalysts not only surpassed the OER-mass activity of a commercial catalyst (IrO2) – reference – but also reached higher electrochemical active surface areas and enhanced stability under the OER conditions. The highest performance was achieved with Ir NPs supported on ITO (176 A/gIr vs. 15.5 A/gIr for the reference catalyst @ 1.51 V vs. RHE) and both IrOx/ITO and IrOx/SnO2 catalysts demonstrated remarkable stability after cycling the electrode and performing long-term chronopotentiometry. ITO is, therefore, an auspicious support to serve Ir-based catalysts as it favors a good bargain between activity and stability, while drastically reducing the amount of noble metal.

Electrochemical and photoelectrochemical water splitting with a CoOx catalyst prepared by flame assisted deposition

2020 ◽  
Vol 49 (3) ◽  
pp. 588-592 ◽  
Author(s):  
Fusheng Li ◽  
Ziqi Zhao ◽  
Hao Yang ◽  
Dinghua Zhou ◽  
Yilong Zhao ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Water Splitting ◽  
Water Oxidation ◽  
Oxide Catalyst ◽  
Photoelectrochemical Water Splitting ◽  
Deposition Method ◽  
Photoelectrochemical Water Oxidation

A cobalt oxide catalyst prepared by a flame-assisted deposition method on the surface of FTO and hematite for electrochemical and photoelectrochemical water oxidation, respectively.

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