On the nature of defect states in tungstate nanoflake arrays as promising photoanodes in solar fuel cells

2016 ◽  
Vol 18 (32) ◽  
pp. 22217-22223 ◽  
Author(s):  
Aya M. Mohamed ◽  
Ahmad W. Amer ◽  
Siham Y. AlQaradawi ◽  
Nageh K. Allam
Keyword(s):  
Fuel Cells ◽  
Tungsten Oxide ◽  
Water Splitting ◽  
Electrochemical Method ◽  
Solar Fuel ◽  
Defect States

An electrochemical method is presented to study the nature of the defect states in sub-stoichiometric tungsten oxide nanoflake photoanodes used in water splitting.

Defect states determined the performance of dopant-free anatase nanocrystals in solar fuel cells

Solar Energy ◽  
2017 ◽  
Vol 144 ◽  
pp. 445-452 ◽  
Author(s):  
Ahmed El-Sayed ◽  
Nada Atef ◽  
Aiat H. Hegazy ◽  
K.R. Mahmoud ◽  
R.M. Abdel Hameed ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solar Fuel ◽  
Defect States

Photocatalytic conversion of carbon dioxide into methanol in reverse fuel cells with tungsten oxide and layered double hydroxide photocatalysts for solar fuel generation

2014 ◽  
Vol 4 (6) ◽  
pp. 1644-1651 ◽  
Author(s):  
Motoharu Morikawa ◽  
Yuta Ogura ◽  
Naveed Ahmed ◽  
Shogo Kawamura ◽  
Gaku Mikami ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Fuel Cells ◽  
Tungsten Oxide ◽  
Layered Double Hydroxide ◽  
Aqueous Phase ◽  
Solar Fuel ◽  
Double Hydroxide ◽  
Solar Fuel Generation

Photofuel cells comprising WO3 and layered double hydroxide converted gaseous CO2 into methanol whereas hydrogen was formed in the aqueous phase.

Applications of two dimensional material-MXene for proton exchange membrane fuel cells (PEMFCs) and water electrolysis

2020 ◽  
Vol 16 ◽  
Author(s):  
Chanchan Fan ◽  
Peng Zhang ◽  
Ranran Wang ◽  
Yezhu Xu ◽  
Xingrui Sun ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Water Splitting ◽  
Proton Exchange Membrane ◽  
Layer Structure ◽  
Metal Layer ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Two Dimensional ◽  
Max Phases ◽  
Early Transition Metal

: A new kind of two-dimensional (2D) materials MXene (early transition metal carbides, nitrides and carbonitrides) is obtained by selective etching the A element from the MAX phases. MXene exhibits both the metallic conductivity and the hydrophilic nature due to its metal layer structure and hydroxyl or oxygen terminated surfaces. This review provides an overview of the MXene used in the electrolytes and electrodes for the fuel cells and water splitting. MXene with functional groups termination could construct ion channels that significantly benefits to the ion conductivity through the electrolyte. The metal supported by MXene interaction offers electronic, compositional, and geometric effects that could enhance the catalytic activity and stability. MXene have already shown promising performance for fuel cells and water electrolysis. Herein, the etching and intercalation methods of MXene in recent years are summarized. The applications of MXene for fuel cells electrolyte, catalyst and water splitting catalyst are revealed to provide more brief idea for MXene used as new energy materials.

Design Principles for Tungsten Oxide Electrocatalyst for Water Splitting

2021 ◽  
Author(s):  
Xueying Chen ◽  
Jun Yang ◽  
Yifan Cao ◽  
Luo Kong ◽  
Jianfeng Huang
Keyword(s):  
Tungsten Oxide ◽  
Water Splitting ◽  
Design Principles

scholarly journals Recent Advances in Nanoscale Based Electrocatalysts for Metal-Air Battery, Fuel Cell and Water-Splitting Applications: An Overview

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 458
Author(s):  
Tse-Wei Chen ◽  
Ganesan Anushya ◽  
Shen-Ming Chen ◽  
Palraj Kalimuthu ◽  
Vinitha Mariyappan ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Energy Storage ◽  
Water Splitting ◽  
Clean Energy ◽  
Life Cycles ◽  
Great Promise ◽  
Storage Technology ◽  
Highly Efficient ◽  
Energy Storage Technology ◽  
Air Battery

Metal-air batteries and fuel cells are considered the most promising highly efficient energy storage systems because they possess long life cycles, high carbon monoxide (CO) tolerance, and low fuel crossover ability. The use of energy storage technology in the transport segment holds great promise for producing green and clean energy with lesser greenhouse gas (GHG) emissions. In recent years, nanoscale based electrocatalysts have shown remarkable electrocatalytic performance towards the construction of sustainable energy-related devices/applications, including fuel cells, metal-air battery and water-splitting processes. This review summarises the recent advancement in the development of nanoscale-based electrocatalysts and their energy-related electrocatalytic applications. Further, we focus on different synthetic approaches employed to fabricate the nanomaterial catalysts and also their size, shape and morphological related electrocatalytic performances. Following this, we discuss the catalytic reaction mechanism of the electrochemical energy generation process, which provides close insight to develop a more efficient catalyst. Moreover, we outline the future perspectives and challenges pertaining to the development of highly efficient nanoscale-based electrocatalysts for green energy storage technology.

scholarly journals Photoactive Tungsten-Oxide Nanomaterials for Water-Splitting

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1871
Author(s):  
Yerkin Shabdan ◽  
Aiymkul Markhabayeva ◽  
Nurlan Bakranov ◽  
Nurxat Nuraje
Keyword(s):  
Tungsten Oxide ◽  
Water Splitting ◽  
Diffusion Length ◽  
Photogenerated Electron ◽  
Photoelectrochemical Cell ◽  
High Electron ◽  
Applied Bias ◽  
Electron Hole ◽  
Research Directions ◽  
Photocatalytic Applications

This review focuses on tungsten oxide (WO3) and its nanocomposites as photoactive nanomaterials for photoelectrochemical cell (PEC) applications since it possesses exceptional properties such as photostability, high electron mobility (~12 cm2 V−1 s−1) and a long hole-diffusion length (~150 nm). Although WO3 has demonstrated oxygen-evolution capability in PEC, further increase of its PEC efficiency is limited by high recombination rate of photogenerated electron/hole carriers and slow charge transfer at the liquid–solid interface. To further increase the PEC efficiency of the WO3 photocatalyst, designing WO3 nanocomposites via surface–interface engineering and doping would be a great strategy to enhance the PEC performance via improving charge separation. This review starts with the basic principle of water-splitting and physical chemistry properties of WO3, that extends to various strategies to produce binary/ternary nanocomposites for PEC, particulate photocatalysts, Z-schemes and tandem-cell applications. The effect of PEC crystalline structure and nanomorphologies on efficiency are included. For both binary and ternary WO3 nanocomposite systems, the PEC performance under different conditions—including synthesis approaches, various electrolytes, morphologies and applied bias—are summarized. At the end of the review, a conclusion and outlook section concluded the WO3 photocatalyst-based system with an overview of WO3 and their nanocomposites for photocatalytic applications and provided the readers with potential research directions.

Mesoporous tungsten oxide modified by nanolayered manganese-calcium oxide as robust photoanode for solar water splitting

2018 ◽  
Vol 516 ◽  
pp. 145-152 ◽  
Author(s):  
Kezhen Li ◽  
Chao Zhang ◽  
Aijuan Liu ◽  
Dongmei Chu ◽  
Chunyong Zhang ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Water Splitting ◽  
Calcium Oxide ◽  
Solar Water ◽  
Solar Water Splitting
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