scholarly journals Recent Advancements and Future Prospects in Ultrathin 2D Semiconductor-Based Photocatalysts for Water Splitting

Catalysts ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1111
Author(s):  
Xiaoyong Yang ◽  
Deobrat Singh ◽  
Rajeev Ahuja

Ultrathin two-dimensional (2D) semiconductor-mediated photocatalysts have shown their compelling potential and have arguably received tremendous attention in photocatalysis because of their superior thickness-dependent physical, chemical, mechanical and optical properties. Although numerous comprehensions about 2D semiconductor photocatalysts have been amassed up to now, low cost efficiency, degradation, kinetics of charge transfer along with recycling are still the big challenges to realize a wide application of 2D semiconductor-based photocatalysis. At present, most photocatalysts still need rare or expensive noble metals to improve the photocatalytic activity, which inhibits their commercial-scale application extremely. Thus, developing less costly, earth-abundant semiconductor-based photocatalysts with efficient conversion of sunlight energy remains the primary challenge. In this review, it begins with a brief description of the general mechanism of overall photocatalytic water splitting. Then a concise overview of different types of 2D semiconductor-mediated photocatalysts is given to figure out the advantages and disadvantages for mentioned semiconductor-based photocatalysis, including the structural property and stability, synthesize method, electrochemical property and optical properties for H2/O2 production half reaction along with overall water splitting. Finally, we conclude this review with a perspective, marked on some remaining challenges and new directions of 2D semiconductor-mediated photocatalysts.

2020 ◽  
Vol 4 (2) ◽  
pp. 1900102
Author(s):  
Sitthichok Kasemthaveechok ◽  
Kiseok Oh ◽  
Bruno Fabre ◽  
Jean‐François Bergamini ◽  
Cristelle Mériadec ◽  
...  

2018 ◽  
Vol 2 (11) ◽  
pp. 1800075 ◽  
Author(s):  
Sitthichok Kasemthaveechok ◽  
Kiseok Oh ◽  
Bruno Fabre ◽  
Jean-François Bergamini ◽  
Cristelle Mériadec ◽  
...  

Author(s):  
Wei Ma ◽  
Jiajia Ge ◽  
Jin You Zheng ◽  
Jiangwei Zhang ◽  
Suyu Jiang ◽  
...  

Exploring efficient electrocatalysts through controllable defect engineering in materials with low-cost and earth-abundant elements is highly desired for overall water splitting. Herein, a hybrid electrocatalyst was accomplished by growing layered...


Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 429
Author(s):  
Sami M. Ibn Shamsah

Of all the available resources given to mankind, the sunlight is perhaps the most abundant renewable energy resource, providing more than enough energy on earth to satisfy all the needs of humanity for several hundred years. Therefore, it is transient and sporadic that poses issues with how the energy can be harvested and processed when the sun does not shine. Scientists assume that electro/photoelectrochemical devices used for water splitting into hydrogen and oxygen may have one solution to solve this hindrance. Water electrolysis-generated hydrogen is an optimal energy carrier to store these forms of energy on scalable levels because the energy density is high, and no air pollution or toxic gas is released into the environment after combustion. However, in order to adopt these devices for readily use, they have to be low-cost for manufacturing and operation. It is thus crucial to develop electrocatalysts for water splitting based on low-cost and land-rich elements. In this review, I will summarize current advances in the synthesis of low-cost earth-abundant electrocatalysts for overall water splitting, with a particular focus on how to be linked with photoelectrocatalytic water splitting devices. The major obstacles that persist in designing these devices. The potential future developments in the production of efficient electrocatalysts for water electrolysis are also described.


2016 ◽  
Vol 4 (4) ◽  
pp. 1312-1318 ◽  
Author(s):  
Lee A. Burton ◽  
Thomas J. Whittles ◽  
David Hesp ◽  
Wojciech M. Linhart ◽  
Jonathan M. Skelton ◽  
...  

Crystals of earth-abundant tin disulfide exhibit high-surface-area platelet formation with ideal photocatalytic properties for water splitting in their ground state.


Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1374
Author(s):  
Sheng Zeng ◽  
Triratna Muneshwar ◽  
Saralyn Riddell ◽  
Ajay Peter Manuel ◽  
Ehsan Vahidzadeh ◽  
...  

The lack of active, stable, earth-abundant, and visible-light absorbing materials to replace plasmonic noble metals is a critical obstacle for researchers in developing highly efficient and cost-effective photocatalytic systems. Herein, a core–shell nanotube catalyst was fabricated consisting of atomic layer deposited HfN shell and anodic TiO2 support layer with full-visible regime photoactivity for photoelectrochemical water splitting. The HfN active layer has two unique characteristics: (1) a large bandgap between optical and acoustic phonon modes (2) and no electronic bandgap, which allows a large population of long life-time hot carriers, which are used to enhance the photoelectrochemical performance. The photocurrent density (≈2.5 mA·cm−2 at 1 V vs. Ag/AgCl) obtained in this study under AM 1.5G 1 Sun illumination is unprecedented, as it is superior to most existing plasmonic noble metal-decorated catalysts and surprisingly indicates a photocurrent response that extends to 730 nm. The result demonstrates the far-reaching application potential of replacing active HER/HOR noble metals such as Au, Ag, Pt, Pd, etc. with low-cost plasmonic ceramics.


2020 ◽  
Vol 8 (26) ◽  
pp. 13340-13350
Author(s):  
Yayun Pu ◽  
Matthew J. Lawrence ◽  
Veronica Celorrio ◽  
Qi Wang ◽  
Meng Gu ◽  
...  

Low cost, high-efficiency catalysts towards water splitting are urgently required to fulfil the increasing demand for energy.


Author(s):  
Ashish Gaur ◽  
Parrydeep K. Sachdeva ◽  
Rajinder Kumar ◽  
Takahiro Maruyama ◽  
Chandan Bera ◽  
...  

The possibilities to resolve the exponential increase in energy demand using water splitting have also triggered huge worldwide attention towards the oxygen evolution reaction using an efficient, earth-abundant and low-cost electrocatalyst.


2021 ◽  
Vol 33 (3) ◽  
pp. 627-631
Author(s):  
S.K. Cho ◽  
J.H. Jung ◽  
Y. Sissembayeva ◽  
J.H. Song ◽  
D.I. Jung ◽  
...  

Photocatalytic water splitting converts solar energy to storable hydrogen molecules which has the highest energy per mass. Most catalysts for photocatalytic water splitting utilize noble metals or precious metals. Organic photocatalysts are attracting more attention owing to several advantages like light weight, low cost, defined structure and tunability. In this study, the synthesis of several dibenzo[b,f][1,5]- diazocines via microwave irradiation for water splitting application is reported. Microwave irradiation facilitates fast, safe and simple synthesis in green reaction conditions. Mini library of dibenzo[b,f][1,5]diazocines were created in order to understand substituents effect on the photocatalytic activity.


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