Fabrication of a Three-Dimensional Bionic Si/TiO2/MoS2 Photoelectrode for Efficient Solar Water Splitting

Author(s):  
Xin Li ◽  
Ying Li ◽  
Haijun Wang ◽  
Hongyan Miao ◽  
Haiyan Zhu ◽  
...  
NANO ◽  
2019 ◽  
Vol 14 (11) ◽  
pp. 1950146
Author(s):  
Jia Liu ◽  
Yinghua Zhang ◽  
Zhiming Bai ◽  
Zhian Huang ◽  
Yukun Gao ◽  
...  

An integrated tandem photoelectrochemical (PEC) cell, composed of a three-dimensional (3D) ZnO/CdS/NiFe layered double hydroxide (LDH) core/shell/hierarchical nanowire arrays (NWAs) photoanode and a [Formula: see text]-Cu2O photocathode, was designed for unassisted overall solar water splitting in this study. The optical and photoelectrochemical characteristics of ZnO-based photoanodes and Cu2O photocathode were investigated. The results show that ZnO/CdS/NiFe LDH nanostructures offer significantly enhanced performances with a photocurrent density reaching 5.8[Formula: see text]mA[Formula: see text][Formula: see text][Formula: see text]cm[Formula: see text] at 0.9[Formula: see text]V and an onset potential as early as 0.1[Formula: see text]V (versus RHE). The enhancement can be attributed to the existence of CdS nanoparticles (NPs) which boosts the light absorption in visible region and enhances charge separation. Moreover, the introduction of NiFe LDH nanoplates, with unique hierarchical mesoporous architecture, promotes electrochemical reactions by providing more active sites as co-catalyst. On the above basis, the ZnO/CdS/NiFe LDH–Cu2O two-electrode tandem cell system was established. At zero bias, the device shows a photocurrent density of 0.4[Formula: see text]mA[Formula: see text][Formula: see text][Formula: see text]cm[Formula: see text] along with the corresponding solar-to-hydrogen (STH) conversion efficiency reaching 0.50%. Our results indicate that the tandem PEC cells consisting of metal–oxide–semiconductor photoelectrodes based on Earth-abundant and low-cost materials hold promising application potential for overall solar water splitting.


Solar RRL ◽  
2020 ◽  
Vol 4 (5) ◽  
pp. 1900559
Author(s):  
Kang Wang ◽  
Dingwang Huang ◽  
Lintao Li ◽  
Kuang Feng ◽  
Takashi Harada ◽  
...  

Solar RRL ◽  
2020 ◽  
Vol 4 (5) ◽  
pp. 2070055 ◽  
Author(s):  
Kang Wang ◽  
Dingwang Huang ◽  
Lintao Li ◽  
Kuang Feng ◽  
Takashi Harada ◽  
...  

Author(s):  
Alfred Ludwig ◽  
Mona Nowak ◽  
Swati Kumari ◽  
Helge S. Stein ◽  
Ramona Gutkowski ◽  
...  

Author(s):  
Xin Zou ◽  
Xueyang Han ◽  
Chengxiong Wang ◽  
Yunkun Zhao ◽  
Chun Du ◽  
...  

Ta3N5 is regarded as a promising candidate material with adequate visible light absorption and band structure for photoelectrochemical water splitting. However, the performance of Ta3N5 is severely limited by the...


2021 ◽  
Vol 2 (6) ◽  
pp. 100468
Author(s):  
Lintao Li ◽  
Chenyang Wang ◽  
Kuang Feng ◽  
Dingwang Huang ◽  
Kang Wang ◽  
...  

Small Science ◽  
2021 ◽  
pp. 2000074
Author(s):  
Xianlong Li ◽  
Zhiliang Wang ◽  
Lianzhou Wang

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