Synthesis and control strategies of nanomaterials for photoelectrochemical water splitting

2021 ◽  
Author(s):  
Zhengang Guo ◽  
Zhifeng Liu

Photoelectrochemical water splitting to produce hydrogen using solar energy can capture and convert solar energy directly into chemical energy, which is an effective way to deal with current energy and...

2021 ◽  
Author(s):  
Cheon Woo Moon ◽  
Min-Ju Choi ◽  
Jerome Hyun ◽  
Ho Won Jang

The water-based renewable chemical energy cycle has attracted interest for its role in replacing existing non-renewable resources and alleviating environmental issues. Utilizing the semi-infinite solar energy source is the most...


Energy saving can be maximized by rectifying the intermediate conversion processes involved during the utilization of solar energy. The system eliminates the transformation of electrical form of solar energy into another form by directly utilizing its electrical energy in the management and control of power supplies obtained from renewable (solar) and conventional (mains) energy sources. A current control scheme is presented in which current delivered by solar supply is used to control the current in mains supply in such a way that both currents are inversely proportional to each other. Any increment in solar current opposes mains current in the same proportion and vice versa. A balanced common physical output is resulted from the electrical load supplied by each source separately. A natural variation in solar radiation is utilized to fluctuate the solar current which is further used to change the mains current. Energy saving is maximized in this supply management by the optimal utilization of solar energy.


2019 ◽  
Vol 7 (19) ◽  
pp. 11895-11907 ◽  
Author(s):  
C. M. Tian ◽  
M. Jiang ◽  
D. Tang ◽  
L. Qiao ◽  
H. Y. Xiao ◽  
...  

CuWO4 is an n-type oxide semiconductor with a bandgap of 2.2 eV which exhibits great potential for photoelectrochemical (PEC) conversion of solar energy into chemical fuels.


2021 ◽  
Author(s):  
Mengnan Ruan ◽  
Dandan Guo ◽  
Qixiang Jia

Photoelectrochemical (PEC) water splitting to produce renewable H2 fuel by storage of solar energy has attracted increasing attention due to it could shrink carbon footprint and solve the global consumption...


Coatings ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 309 ◽  
Author(s):  
Jun Hu ◽  
Shuo Zhao ◽  
Xin Zhao ◽  
Zhong Chen

This review presents the latest processes for designing anode materials to improve the efficiency of water photolysis. Based on different contributions towards the solar-to-hydrogen efficiency, we mainly review the strategies to enhance the light absorption, facilitate the charge separation, and enhance the surface charge injection. Although great achievements have been obtained, the challenges faced in the development of anode materials for solar energy to make water splitting remain significant. In this review, the major challenges to improve the conversion efficiency of photoelectrochemical water splitting reactions are presented. We hope that this review helps researchers in or coming to the field to better appreciate the state-of-the-art, and to make a better choice when they embark on new research in photocatalytic water splitting.


Author(s):  
Yubin Chen ◽  
Wenyu Zhen ◽  
Sebastián Murcia-López ◽  
Fei Lv ◽  
Joan R. Morante ◽  
...  

Photoelectrochemical (PEC) water splitting is a very attractive approach to produce clean hydrogen using abundant natural resources such as solar energy and (sea)water. As its primary step, light absorption controls...


Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3195
Author(s):  
Ming Tao ◽  
Yanzhe Yu ◽  
Huan Zhang ◽  
Tianzhen Ye ◽  
Shijun You ◽  
...  

Solar energy-gas-fired boiler heating systems attract widespread attention due to their eco-friendly technologies and reasonable prices. In order to promote the application of a solar energy-gas-fired boiler system for decentralized heating, this study proposed a holistic method to optimize the combination of equipment specifications and control strategies of the system. A detailed mathematical model of the hybrid energy system was developed and validated by experiments to simulate various operating conditions and evaluate the optimal design results. A case study was conducted in Tianjin, China, and optimal schemes were obtained. The influence of different factors on the system’s annual comprehensive energy efficiency ratio (AEER) and annual cost (AC) were studied by sensitivity analysis; the results showed that the solar collector area was extremely valuable for the optimization of AEER and AC. The results of this study provide a reference for the optimization design of the solar energy-gas-fired boiler system, which is beneficial to the promotion of the utilization of solar energy.


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