Visible-Light Illumination Enhanced Hydrogen Evolution on CuO Modified TiO2 Nanotube Arrays/Ti Electrocatalyst

2013 ◽  
Vol 772 ◽  
pp. 343-348
Author(s):  
Zhao Xiong Yan ◽  
Zhi Hua Xu ◽  
Li Hong Zhu
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Electrochemical Impedance ◽  
Electrochemical Impedance Spectrum ◽  
Nanotube Arrays ◽  
Light Illumination ◽  
Current Time ◽  
Visible Light Illumination

TiO2nanotube arrays (TNAs) modified by CuO (CuO-TNAs) catalysts were prepared by an impregnating-calcinating method using the electrochemically prepared TNAs and Cu (NO3)2as precursors and were characterized by scanning electron microscope, transmission electron microscopy, X-ray diffraction spectroscopy and UV-visible spectroscopy. The electrocatalytic properties of the CuO-TNAs samples for hydrogen evolution reaction (HER) were investigated by linear sweep curves, electrochemical impedance spectrum and current-time curves. The results showed that the electrocatalytic activity of TNAs for hydrogen evolution reaction (HER) was significantly enhanced by CuO modification, and the electrocatalytic activity of CuO-TNAs catalysts could be further promoted by visible-light illumination. The combination of visible-light irradiation with applying a controlled potential may provide new insight into enhancing the performances of the cathode for hydrogen evolution reaction.

scholarly journals Amorphous Ni x Co y P-supported TiO2 nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution

2019 ◽  
Vol 10 ◽  
pp. 62-70 ◽  
Author(s):  
Yong Li ◽  
Peng Yang ◽  
Bin Wang ◽  
Zhongqing Liu
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Photoelectron Spectroscopy ◽  
Electrochemical Impedance ◽  
Nanotube Arrays ◽  
Active Surface Area ◽  
X Ray ◽  
Transmission Electron

Bimetallic phosphides have been attracting increasing attention due to their synergistic effect for improving the hydrogen evolution reaction as compared to monometallic phosphides. In this work, NiCoP modified hybrid electrodes were fabricated by a one-step electrodeposition process with TiO2 nanotube arrays (TNAs) as a carrier. X-ray diffraction, transmission electron microscopy, UV–vis diffuse reflection spectroscopy, X-ray photoelectron spectroscopy and scanning transmission electron microscopy/energy-dispersive X-ray spectroscopy were used to characterize the physiochemical properties of the samples. The electrochemical performance was investigated by cyclic voltammetry, linear sweep voltammetry, and electrochemical impedance spectroscopy. We show that after incorporating Co into Ni–P, the resulting Ni x Co y P/TNAs present enhanced electrocatalytic activity due to the improved electron transfer and increased electrochemically active surface area (ECSA). In 0.5 mol L−1 H2SO4 electrolyte, the Ni x Co y P/TNAs (x = 3.84, y = 0.78) demonstrated an ECSA value of 52.1 mF cm−2, which is 3.8 times that of Ni–P/TNAs (13.7 mF cm−2). In a two-electrode system with a Pt sheet as the anode, the Ni x Co y P/TNAs presented a bath voltage of 1.92 V at 100 mA cm−2, which is an improvment of 79% over that of 1.07 V at 10 mA cm−2.

Plasmonic Au nanoparticles embedding enhances the activity and stability of CdS for photocatalytic hydrogen evolution

2016 ◽  
Vol 52 (11) ◽  
pp. 2394-2397 ◽  
Author(s):  
Guiyang Yu ◽  
Xiang Wang ◽  
Jungang Cao ◽  
Shujie Wu ◽  
Wenfu Yan ◽  
...  
Keyword(s):  
Visible Light ◽  
Full Advantage ◽  
High Activity ◽  
Hydrogen Evolution ◽  
Electromagnetic Fields ◽  
Composite Structure ◽  
Au Nanoparticles ◽  
Light Illumination ◽  
Photocatalytic Hydrogen Evolution ◽  
Visible Light Illumination

A semiconductor fabricated by embedding plasmonic Au nanoparticles into CdS exhibits a high activity and stability for photocatalytic H2evolution. This composite structure could take full advantage of electromagnetic fields at the surface of the Au nanoparticles under visible light illumination.

The investigation of hydrogen evolution using Ca doped ZnO catalysts under visible light illumination

2020 ◽  
Vol 105 ◽  
pp. 104748 ◽  
Author(s):  
Irshad Ahmad ◽  
Ejaz Ahmed ◽  
Mukhtar Ahmad ◽  
Muhammad Shoaib Akhtar ◽  
Muhammad Aqib Basharat ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Light Illumination ◽  
Visible Light Illumination ◽  
Doped Zno
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