scholarly journals On the Stability of Water Oxidation Catalysts: Challenges and Prospects

2012 ◽  
Vol 65 (6) ◽  
pp. 638 ◽  
Author(s):  
Alex Izgorodin ◽  
Orawan Winther-Jensen ◽  
Douglas R. MacFarlane
Keyword(s):  
Water Splitting ◽  
Water Oxidation ◽  
Commercial Application ◽  
Significant Progress ◽  
Oxidation Catalysts ◽  
Research Focus ◽  
Catalytic Activities ◽  
The Stability ◽  
Stability Of Water

Future requirements for water splitting technologies need highly efficient water oxidation catalysts that are sufficiently stable for operation over many years. Recent research has achieved significant progress in improving the electro-catalytic activities of these catalysts. However, there has not been a strong research focus on their long-term mechanical and chemical stability, yet this is critical for commercial application. In this paper we discuss some of the chemical and thermodynamic challenges confronting this goal, as well as some of the strategies that are available to overcome them. The challenge becomes even greater in the area of photo-active electromaterials; fortunately some of the same strategies may allow progress in this area also.

“Hybrid Tandem Device Based on Thin-Film Silicon Photovoltaics and Nanostructured Water Oxidation Catalysts for Solar Water Splitting”

2019 ◽  
Author(s):  
Drialys Cardenas-Morcoso ◽  
Tsvetelina Merdzhanova ◽  
Vladimir Smirnov ◽  
Friedhelm Finger ◽  
Bernhard Kaiser ◽  
...  
Keyword(s):  
Thin Film ◽  
Water Splitting ◽  
Water Oxidation ◽  
Oxidation Catalysts ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Thin Film Silicon ◽  
Silicon Photovoltaics

Dye functionalized carbon nanotubes for photoelectrochemical water splitting – role of inner tubes

2016 ◽  
Vol 4 (7) ◽  
pp. 2473-2483 ◽  
Author(s):  
Yi Cheng ◽  
Amir Memar ◽  
Martin Saunders ◽  
Jian Pan ◽  
Chang Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Water Splitting ◽  
Water Oxidation ◽  
Photoelectrochemical Water Splitting ◽  
Oxidation Catalysts ◽  
Functionalized Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Dye functionalized double- and triple-walled carbon nanotubes are effective photoanodes for water splitting without the attachment of semiconductor and water oxidation catalysts.

scholarly journals The Reactivity and Stability of Polyoxometalate Water Oxidation Electrocatalysts

Molecules ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 157 ◽  
Author(s):  
Dandan Gao ◽  
Ivan Trentin ◽  
Ludwig Schwiedrzik ◽  
Leticia González ◽  
Carsten Streb
Keyword(s):  
Water Oxidation ◽  
Homogeneous Solution ◽  
Theoretical Studies ◽  
Future Perspectives ◽  
Oxidation Catalysts ◽  
Electrically Conductive ◽  
Conductive Substrates ◽  
Emerging Themes ◽  
Phase Water ◽  
The Stability

This review describes major advances in the use of functionalized molecular metal oxides (polyoxometalates, POMs) as water oxidation catalysts under electrochemical conditions. The fundamentals of POM-based water oxidation are described, together with a brief overview of general approaches to designing POM water oxidation catalysts. Next, the use of POMs for homogeneous, solution-phase water oxidation is described together with a summary of theoretical studies shedding light on the POM-WOC mechanism. This is followed by a discussion of heterogenization of POMs on electrically conductive substrates for technologically more relevant application studies. The stability of POM water oxidation catalysts is discussed, using select examples where detailed data is already available. The review finishes with an outlook on future perspectives and emerging themes in electrocatalytic polyoxometalate-based water oxidation research.

Insights into Ru-Based Molecular Water Oxidation Catalysts: Electronic and Noncovalent-Interaction Effects on Their Catalytic Activities

2013 ◽  
Vol 52 (14) ◽  
pp. 7844-7852 ◽  
Author(s):  
Lele Duan ◽  
Lei Wang ◽  
A. Ken Inge ◽  
Andreas Fischer ◽  
Xiaodong Zou ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Interaction Effects ◽  
Noncovalent Interaction ◽  
Molecular Water ◽  
Oxidation Catalysts ◽  
Catalytic Activities

scholarly journals Water Oxidation Catalysts: The Quest for New Oxide-Based Materials

Inorganics ◽  
2019 ◽  
Vol 7 (3) ◽  
pp. 29 ◽  
Author(s):  
Christos Mavrokefalos ◽  
Greta Patzke
Keyword(s):  
Water Oxidation ◽  
Fossil Fuels ◽  
Artificial Photosynthesis ◽  
Low Cost ◽  
Research Area ◽  
Catalyst Design ◽  
Oxidation Catalysts ◽  
Solar Water Splitting ◽  
Cost Efficient

The expected shortage of fossil fuels as well as the accompanying climate change are among the major challenges of the 21st century. A global shift to a sustainable energy landscape is, therefore, of utmost importance. Over the past few years, solar technologies have entered the energy market and have paved the way to replace fossil-based energy sources, in the long term. In particular, electrochemical solar-to-hydrogen technologies have attracted a lot of interest—not only in academia, but also in industry. Solar water splitting (artificial photosynthesis) is one of the most active areas in contemporary materials and catalysis research. The development of low-cost, efficient, and stable water oxidation catalysts (WOCs) remains crucial for artificial photosynthesis applications, because WOCs still represent a major economical and efficient bottleneck. In the following, we summarize recent advances in water oxidation catalysts development, with selected examples from 2016 onwards. This condensed survey demonstrates that the ongoing quest for new materials and informed catalyst design is a dynamic and rapidly developing research area.

scholarly journals Dye-sensitized photoelectrochemical water oxidation through a buried junction

2018 ◽  
Vol 115 (27) ◽  
pp. 6946-6951 ◽  
Author(s):  
Pengtao Xu ◽  
Tian Huang ◽  
Jianbin Huang ◽  
Yun Yan ◽  
Thomas E. Mallouk
Keyword(s):  
Solar Cell ◽  
Water Splitting ◽  
Water Oxidation ◽  
Molecular Water ◽  
Phosphate Solution ◽  
Oxidation Catalysts ◽  
Faradaic Efficiency ◽  
Dye Sensitized ◽  
Electrode Potentials ◽  
Oxide Electrodes

Water oxidation has long been a challenge in artificial photosynthetic devices that convert solar energy into fuels. Water-splitting dye-sensitized photoelectrochemical cells (WS-DSPECs) provide a modular approach for integrating light-harvesting molecules with water-oxidation catalysts on metal-oxide electrodes. Despite recent progress in improving the efficiency of these devices by introducing good molecular water-oxidation catalysts, WS-DSPECs have poor stability, owing to the oxidation of molecular components at very positive electrode potentials. Here we demonstrate that a solid-state dye-sensitized solar cell (ss-DSSC) can be used as a buried junction for stable photoelectrochemical water splitting. A thin protecting layer of TiO2 grown by atomic layer deposition (ALD) stabilizes the operation of the photoanode in aqueous solution, although as a solar cell there is a performance loss due to increased series resistance after the coating. With an electrodeposited iridium oxide layer, a photocurrent density of 1.43 mA cm−2 was observed in 0.1 M pH 6.7 phosphate solution at 1.23 V versus reversible hydrogen electrode, with good stability over 1 h. We measured an incident photon-to-current efficiency of 22% at 540 nm and a Faradaic efficiency of 43% for oxygen evolution. While the potential profile of the catalyst layer suggested otherwise, we confirmed the formation of a buried junction in the as-prepared photoelectrode. The buried junction design of ss-DSSs adds to our understanding of semiconductor–electrocatalyst junction behaviors in the presence of a poor semiconducting material.

scholarly journals Photoelectrochemical Device Designs toward Practical Solar Water Splitting: A Review on the Recent Progress of BiVO4 and BiFeO3 Photoanodes

2018 ◽  
Vol 8 (8) ◽  
pp. 1388 ◽  
Author(s):  
Sang Jeong ◽  
Jaesun Song ◽  
Sanghan Lee
Keyword(s):  
Water Splitting ◽  
Water Oxidation ◽  
State Of The Art ◽  
Significant Progress ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Future Challenges ◽  
Promising Solution ◽  
Carrier Separation ◽  
Energy Challenge

Solar-driven water splitting technology is considered to be a promising solution for the global energy challenge as it is capable of generating clean chemical fuel from solar energy. Various strategies and catalytic materials have been explored in order to improve the efficiency of the water splitting reaction. Although significant progress has been made, there are many intriguing fundamental phenomena that need to be understood. Herein, we review recent experimental efforts to demonstrate enhancement strategies for efficient solar water splitting, especially for the light absorption, charge carrier separation, and water oxidation kinetics. We also focus on the state of the art of photoelectrochemical (PEC) device designs such as application of facet engineering and the development of a ferroelectric-coupled PEC device. Based on these experimental achievements, future challenges, and directions in solar water splitting technology will be discussed.

Ethylene glycol-mediated one-pot synthesis of Fe incorporated α-Ni(OH)2 nanosheets with enhanced intrinsic electrocatalytic activity and long-term stability for alkaline water oxidation

2021 ◽  
Author(s):  
Venkataramanan Mahalingam ◽  
Gouri Tudu ◽  
Sourav Ghosh ◽  
Sagar Ganguli ◽  
Murthy Koppsetti ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Water Splitting ◽  
Nickel Hydroxide ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Electrocatalytic Activity ◽  
One Pot ◽  
Long Term Stability ◽  
Pure Phase

Sustainable electrocatalytic water splitting stipulates development of cheap, efficient and stable electrocatalysts to promote comparatively sluggish oxygen evolution reaction. We have synthesized iron incorporated pure phase α-nickel hydroxide, Ni0.8Fe0.2(OH)2 electrocatalyst...

Surface-functionalized perovskite films for stable photoelectrochemical water splitting

2017 ◽  
Vol 5 (3) ◽  
pp. 910-913 ◽  
Author(s):  
Chongwu Wang ◽  
Shuang Yang ◽  
Xiao Chen ◽  
Tianyu Wen ◽  
Hua Gui Yang
Keyword(s):  
Water Splitting ◽  
Surface Functionalization ◽  
Water Oxidation ◽  
Photoelectrochemical Water Splitting ◽  
The Stability

Integration of Ni passivation and surface functionalization with hydrophobic ammonium cations has been demonstrated to enhance the stability of perovskite to moisture. The functionalized perovskite photoanode can perform steady water oxidation for more than 30 min.

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