Engineering surface oxygen defects on tungsten oxide to boost photocatalytic oxygen evolution from water splitting

2019 ◽  
Vol 55 (44) ◽  
pp. 6265-6268 ◽  
Author(s):  
Yi-Hao Chew ◽  
Jie-Yinn Tang ◽  
Li-Jie Tan ◽  
Bryan Wei Jian Choi ◽  
Lling-Lling Tan ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Vacancies ◽  
Surface Oxygen ◽  
Oxygen Defects

This study showcases a facile approach for tuning the degree of surface oxygen vacancies in WO3 and its prominent role in enhancing the performance of WO3 in photocatalytic O2 evolution.

scholarly journals Photocatalytic Overall Water Splitting by SrTiO3 with Surface Oxygen Vacancies

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2572
Author(s):  
Yanfei Fan ◽  
Yan Liu ◽  
Hongyu Cui ◽  
Wen Wang ◽  
Qiaoyan Shang ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Oxygen Vacancies ◽  
Low Cost ◽  
Energy Levels ◽  
Light Response ◽  
Hydrogen Energy ◽  
Surface Oxygen ◽  
Carbon Reduction ◽  
Overall Water Splitting

Strontium Titanate has a typical perovskite structure with advantages of low cost and photochemical stability. However, the wide bandgap and rapid recombination of electrons and holes limited its application in photocatalysis. In this work, a SrTiO3 material with surface oxygen vacancies was synthesized via carbon reduction under a high temperature. It was successfully applied for photocatalytic overall water splitting to produce clean hydrogen energy under visible light irradiation without any sacrificial reagent for the first time. The photocatalytic overall water splitting ability of the as-prepared SrTiO3-C950 is attributed to the surface oxygen vacancies that can make suitable energy levels for visible light response, improving the separation and transfer efficiency of photogenerated carriers.

Improving the oxygen evolution activity of Co3O4 by introducing Ce species derived from Ce-substituted ZIF-67

2019 ◽  
Vol 3 (11) ◽  
pp. 3201-3207 ◽  
Author(s):  
Jieming Zhou ◽  
Haiyan Zheng ◽  
Qingjie Luan ◽  
Xiubing Huang ◽  
Yang Li ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Surface Oxygen ◽  
Oxygen Defects

Proper control of the introduced Ce amount and species in Ce–Co3O4 composites derived from Ce-substituted ZIF-67 precursors could precisely tune the Co3+/Co2+ ratio and induce surface oxygen defects, further boosting the OER performance.

The synergistic effect of Bi2WO6 nanoplates and Co3O4 cocatalysts for enhanced photoelectrochemical properties

2017 ◽  
Vol 5 (39) ◽  
pp. 20594-20597 ◽  
Author(s):  
Guojun Dong ◽  
Yajun Zhang ◽  
Yingpu Bi
Keyword(s):  
Synergistic Effect ◽  
Charge Transport ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Solar Light ◽  
Photoelectrochemical Properties ◽  
Surface Oxygen ◽  
Simulated Solar Light ◽  
Bulk Charge ◽  
Controllable Fabrication

Herein, we demonstrated the controllable fabrication of Bi2WO6 nanoplate arrays decorated with Co3O4 cocatalysts. The synergistic effect of bulk charge transport and surface oxygen evolution could significantly improve the photoelectrochemical properties for water splitting under simulated solar light.

Filling the oxygen vacancies in Co3O4with phosphorus: an ultra-efficient electrocatalyst for overall water splitting

2017 ◽  
Vol 10 (12) ◽  
pp. 2563-2569 ◽  
Author(s):  
Zhaohui Xiao ◽  
Yu Wang ◽  
Yu-Cheng Huang ◽  
Zengxi Wei ◽  
Chung-Li Dong ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Oxygen Vacancies ◽  
Excellent Performance ◽  
Overall Water Splitting

It is of essential importance to design an electrocatalyst with excellent performance for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in water splitting.

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