Oxygen Vacancies in ZnO Nanosheets Enhance CO2 Electrochemical Reduction to CO

2018 ◽  
Vol 57 (21) ◽  
pp. 6054-6059 ◽  
Author(s):  
Zhigang Geng ◽  
Xiangdong Kong ◽  
Weiwei Chen ◽  
Hongyang Su ◽  
Yan Liu ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Oxygen Vacancies ◽  
Zno Nanosheets

Oxygen Vacancies in ZnO Nanosheets Enhance CO2 Electrochemical Reduction to CO

2018 ◽  
Vol 130 (21) ◽  
pp. 6162-6167 ◽  
Author(s):  
Zhigang Geng ◽  
Xiangdong Kong ◽  
Weiwei Chen ◽  
Hongyang Su ◽  
Yan Liu ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Oxygen Vacancies ◽  
Zno Nanosheets

Selective electrochemical reduction of CO2 to CO on CuO/In2O3 nanocomposites: role of oxygen vacancies

2019 ◽  
Vol 9 (19) ◽  
pp. 5339-5349 ◽  
Author(s):  
Pinki Devi ◽  
Karan Malik ◽  
Ekta Arora ◽  
Saswata Bhattacharya ◽  
V. Kalendra ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Sustainable Development ◽  
Electrochemical Reduction ◽  
Oxygen Vacancies ◽  
Electrocatalytic Reduction ◽  
Reduction Of Co2 ◽  
Promising Avenue

For the clean and sustainable development, sequestration of carbon dioxide (CO2) through electrocatalytic reduction to produce high-value industrial precursors, such as CO, is a promising avenue.

Photocatalytic producing dihydroxybenzenes from phenol enabled by gathering oxygen vacancies in ultrathin porous ZnO nanosheets

2020 ◽  
Vol 505 ◽  
pp. 144580 ◽  
Author(s):  
Shuying Gao ◽  
Fu Yang ◽  
Changjian Song ◽  
Qiong Cai ◽  
Ruyi Wang ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Zno Nanosheets

scholarly journals Enhancement of Capacitive Performance in Titania Nanotubes Modified by an Electrochemical Reduction Method

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Nurul Asma Samsudin ◽  
Zulkarnain Zainal ◽  
Hong Ngee Lim ◽  
Yusran Sulaiman ◽  
Sook-Keng Chang ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Electrochemical Reduction ◽  
Photoelectron Spectroscopy ◽  
Oxygen Vacancies ◽  
Reduction Method ◽  
Titania Nanotubes ◽  
Electrochemical Anodization ◽  
Constant Current ◽  
Cyclic Voltammogram ◽  
Capacitive Performance

Highly ordered titania nanotubes (TNTs) were synthesised by an electrochemical anodization method for supercapacitor applications. However, the capacitive performance of the TNTs was relatively low and comparable to the conventional capacitor. Therefore, in order to improve the capacitive performance of the TNTs, a fast and facile electrochemical reduction method was applied to modify the TNTs (R-TNTs) by introducing oxygen vacancies into the lattice. X-ray photoelectron spectroscopy (XPS) data confirmed the presence of oxygen vacancies in the R-TNTs lattice upon the reduction of Ti4+ to Ti3+. Electrochemical reduction parameters such as applied voltage and reduction time were varied to optimize the best conditions for the modification process. The electrochemical performance of the samples was analyzed in a three-electrode configuration cell. The cyclic voltammogram recorded at 200 mV s−1 showed a perfect square-shaped voltammogram indicating the excellent electrochemical performance of R-TNTs prepared at 5 V for 30 s. The total area of the R-TNTs voltammogram was 3 times larger than the unmodified TNTs. A specific capacitance of 11.12 mF cm−2 at a current density of 20 μA cm−2 was obtained from constant current charge-discharge measurements, which was approximately 57 times higher than that of unmodified TNTs. R-TNTs also displayed outstanding cycle stability with 99% capacity retention after 1000 cycles.

Preparation and Photoluminescence Properties of ZnO-Covered Carbon Fibers

2012 ◽  
Vol 463-464 ◽  
pp. 510-514
Author(s):  
Jun Zeng
Keyword(s):  
Carbon Fibers ◽  
Oxygen Vacancies ◽  
Green Emission ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
Red Emission ◽  
Interstitial Carbon ◽  
X Ray ◽  
Zno Nanosheets ◽  
Pl Spectrum

This paper reports that ZnO nanosheet-covered carbon fibers are synthesized by thermal oxidation of zinc films deposited on carbon fiber surfaces. The structure and optical properties were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL) spectrum. The result shows that all of the cabon fibers are coated ZnO nanosheets. An orange-red emission around 683 nm was found in PL spectrum when the sample prepared at 400 oC for 4 hours in air. I considered that the growth of ZnO nanosheets may be related to the size of substrates and reaction temperature. The orange-red emission was resulted from the interstitial carbon of ZnO-nanosheet-covered fibers, and green emission results from the oxygen vacancies.

Embedding oxygen vacancies at SnO2–CNT surfaces via a microwave polyol strategy towards effective electrocatalytic reduction of carbon-dioxide to formate

2020 ◽  
Vol 10 (5) ◽  
pp. 1311-1322
Author(s):  
Kumaravelu Pavithra ◽  
Sakkarapalayam Murugesan Senthil Kumar
Keyword(s):  
Carbon Dioxide ◽  
Electrochemical Reduction ◽  
Oxygen Vacancies ◽  
Polyol Method ◽  
Electrocatalytic Reduction

A facile and scalable microwave-polyol method has been utilised to introduce vacancies onto SnO2–CNT surfaces which significantly brings down the overpotential to around 150 mV during the electrochemical reduction of CO2.

Synergistic Effect of Photonic Crystals and Oxygen Vacancies on Photoelectrochemical Water Splitting of TiO2 Nanotube

2020 ◽  
Vol 15 (2) ◽  
pp. 226-230
Author(s):  
Ming Meng ◽  
Wei Qin ◽  
Chunyang Li ◽  
Kun Xu ◽  
Liuyang Xu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Photonic Crystals ◽  
Synergistic Effect ◽  
Electrochemical Reduction ◽  
Oxygen Vacancies ◽  
Photocurrent Density ◽  
The Novel ◽  
Efficient Utilization ◽  
Visible Light Absorption ◽  
Improved Performance

TiO2 nanotube photonic crystals with a mass of oxygen vacancies (VO-TiO2 NTPCs) are prepared through a simple electrochemical reduction. The novel VO-TiO2 NTPCs produce a photocurrent density of 1.4 mA/cm2 at 0.22 V versus Ag/AgCl with Faradic efficiency of 100%, which is 1.75 times that of pristine TiO2NTPCs. The improved performance is contributed to the fact that the oxygen vacancies created by electrochemical reduction, which not only promote efficient utilization of the visible light absorption, but also increase electrical conductivity. This work will contribute to the design and fabrication of the TiO2nanotube-based photoelectric devices.

ZnO Nanosheets Abundant in Oxygen Vacancies Derived from Metal‐Organic Frameworks for ppb‐Level Gas Sensing

2019 ◽  
Vol 31 (11) ◽  
pp. 1807161 ◽  
Author(s):  
Hongye Yuan ◽  
Saif Abdulla Ali Alateeqi Aljneibi ◽  
Jiaren Yuan ◽  
Yuxiang Wang ◽  
Hui Liu ◽  
...  
Keyword(s):  
Oxygen Vacancies ◽  
Gas Sensing ◽  
Metal Organic Frameworks ◽  
Zno Nanosheets ◽  
Metal Organic

Heterostructure of ZnO Nanosheets/Zn with a Highly Enhanced Edge Surface for Efficient CO2 Electrochemical Reduction to CO

2021 ◽  
Vol 13 (9) ◽  
pp. 10837-10844
Author(s):  
Qian Xiang ◽  
Fan Li ◽  
Jiale Wang ◽  
Wenlong Chen ◽  
Qiushi Miao ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Zno Nanosheets ◽  
Edge Surface
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