Enhancement of photoelectrochemical oxidation by an amorphous nickel boride catalyst on porous BiVO4

Nanoscale ◽  
2017 ◽  
Vol 9 (42) ◽  
pp. 16133-16137 ◽  
Author(s):  
Ke Dang ◽  
Xiaoxia Chang ◽  
Tuo Wang ◽  
Jinlong Gong
Keyword(s):  
Water Oxidation ◽  
Reversible Hydrogen Electrode ◽  
Hydrogen Electrode ◽  
Nickel Boride ◽  
Onset Potential ◽  
Photoelectrochemical Oxidation ◽  
Photoelectrochemical Water Oxidation

This paper describes an amorphous nickel boride (NiB) electrocatalyst loaded on porous BiVO4 for photoelectrochemical water oxidation. The NiB/BiVO4 photoanode exhibits an onset potential of 0.25 V versus the reversible hydrogen electrode (vs. RHE) and a photocurrent of 3.47 mA cm−2 at 1.23 V vs. RHE under simulated 100 mW cm−2 irradiation.

Oriented Growth of Sc-Doped Ta3N5 Nanorod Photoanode Achieving Low-Onset-Potential for Photoelectrochemical Water Oxidation

2018 ◽  
Vol 1 (8) ◽  
pp. 4150-4157 ◽  
Author(s):  
Lang Pei ◽  
Bihu Lv ◽  
Shuangbao Wang ◽  
Zhentao Yu ◽  
Shicheng Yan ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Oriented Growth ◽  
Onset Potential ◽  
Photoelectrochemical Water Oxidation

scholarly journals Comparison of photoelectrochemical water oxidation activity of a synthetic photocatalyst system with photosystem II

2014 ◽  
Vol 176 ◽  
pp. 199-211 ◽  
Author(s):  
Yi-Hsuan Lai ◽  
Masaru Kato ◽  
Dirk Mersch ◽  
Erwin Reisner
Keyword(s):  
Photosystem Ii ◽  
Indium Tin Oxide ◽  
Water Oxidation ◽  
Charge Separation ◽  
High Energy ◽  
Oxidation Catalysis ◽  
Hydrogen Electrode ◽  
Oxidation Activity ◽  
Indium Tin Oxide Electrode ◽  
Onset Potential

This discussion describes a direct comparison of photoelectrochemical (PEC) water oxidation activity between a photosystem II (PSII)-functionalised photoanode and a synthetic nanocomposite photoanode. The semi-biological photoanode is composed of PSII from the thermophilic cyanobacterium Thermosynechococcus elongatus on a mesoporous indium tin oxide electrode (mesoITO|PSII). PSII embeds all of the required functionalities for light absorption, charge separation and water oxidation and ITO serves solely as the electron collector. The synthetic photoanode consists of a TiO2 and NiOx coated nanosheet-structured WO3 electrode (nanoWO3|TiO2|NiOx). The composite structure of the synthetic electrode allows mimicry of the functional key features in PSII: visible light is absorbed by WO3, TiO2 serves as a protection and charge separation layer and NiOx serves as the water oxidation electrocatalyst. MesoITO|PSII uses low energy red light, whereas nanoWO3|TiO2|NiOx requires high energy photons of blue-end visible and UV regions to oxidise water. The electrodes have a comparable onset potential at approximately 0.6 V vs. reversible hydrogen electrode (RHE). MesoITO|PSII reaches its saturation photocurrent at 0.84 V vs. RHE, whereas nanoWO3|TiO2|NiOx requires more than 1.34 V vs. RHE. This suggests that mesoITO|PSII suffers from fewer limitations from charge recombination and slow water oxidation catalysis than the synthetic electrode. MesoITO|PSII displays a higher ‘per active’ site activity, but is less photostable and displays a much lower photocurrent per geometrical surface area and incident photon to current conversion efficiency (IPCE) than nanoWO3|TiO2|NiOx.

Enhanced photoelectrochemical water oxidation on a BiVO4 photoanode modified with multi-functional layered double hydroxide nanowalls

2015 ◽  
Vol 3 (35) ◽  
pp. 17977-17982 ◽  
Author(s):  
Wanhong He ◽  
Ruirui Wang ◽  
Lu Zhang ◽  
Jie Zhu ◽  
Xu Xiang ◽  
...  
Keyword(s):  
Layered Double Hydroxide ◽  
Water Oxidation ◽  
Onset Potential ◽  
Oxidation Efficiency ◽  
Double Hydroxide ◽  
Photoelectrochemical Water Oxidation

A multi-functional layered double hydroxide (LDH)-modified BiVO4 photoanode exhibits a tremendous cathodic shift of the onset potential and more than 2-fold enhancement in the oxidation efficiency and IPCE value.

Nanostructured TaON/Ta3N5 as a highly efficient type-II heterojunction photoanode for photoelectrochemical water splitting

2018 ◽  
Vol 47 (27) ◽  
pp. 8949-8955 ◽  
Author(s):  
Lang Pei ◽  
Hongxu Wang ◽  
Xiaohui Wang ◽  
Zhe Xu ◽  
Shicheng Yan ◽  
...  
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Type Ii ◽  
Reversible Hydrogen Electrode ◽  
Hydrogen Electrode ◽  
Onset Potential ◽  
Highly Efficient ◽  
Negative Shift ◽  
Efficient Type

A heterostructured TaON/Ta3N5 photoanode exhibits a 350 mV negative shift of photocurrent onset potential to 0.65 V versus the reversible hydrogen electrode.

Grey hematite photoanodes decrease the onset potential in photoelectrochemical water oxidation

2021 ◽  
Author(s):  
Peng-Fei Liu ◽  
Chongwu Wang ◽  
Yun Wang ◽  
Yuhang Li ◽  
Bo Zhang ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Onset Potential ◽  
Photoelectrochemical Water Oxidation

scholarly journals Room Temperature Surface Modification of Ultrathin FeOOH Cocatalysts on Fe2O3 Photoanodes for High Photoelectrochemical Water Splitting

2020 ◽  
Vol 2020 ◽  
pp. 1-7 ◽  
Author(s):  
Yiqing Wei ◽  
Aizhen Liao ◽  
Lu Wang ◽  
Xiaoyong Wang ◽  
Dunhui Wang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Room Temperature ◽  
Photocurrent Density ◽  
Reversible Hydrogen Electrode ◽  
Interfacial Resistance ◽  
Hydrogen Electrode ◽  
Onset Potential ◽  
Temperature Surface ◽  
Excellent Stability ◽  
Pec Water Splitting

An ultrathin FeOOH cocatalyst is deposited on α-Fe2O3 photoanodes in a simple room temperature immersion process for efficient photoelectrochemical (PEC) water splitting. The prepared FeOOH/Fe2O3 photoanode has a photocurrent density of up to 2.4 mA/cm2 at 1.23 V versus reversible hydrogen electrode (RHE), and the photocurrent density is increased by about 160% compared to the bare Fe2O3 of 1.55 mA/cm2. An obvious cathodic shift of the photocurrent onset potential from 0.661 to 0.582 V was also observed, and excellent stability was maintained with almost no deterioration for 5 h. The enhanced PEC performance is attributed to the decrease of the interfacial resistance between electrode and electrolyte and the increase of the injection efficiency of holes in Fe2O3.

scholarly journals Hierarchical Ta-Doped TiO2 Nanorod Arrays with Improved Charge Separation for Photoelectrochemical Water Oxidation under FTO Side Illumination

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 983 ◽  
Author(s):  
Shiman He ◽  
Yuying Meng ◽  
Yangfei Cao ◽  
Senchuan Huang ◽  
Jingling Yang ◽  
...  
Keyword(s):  
Tio2 Nanoparticles ◽  
Water Oxidation ◽  
Large Scale ◽  
Nanorod Arrays ◽  
Hydrogen Electrode ◽  
Doped Tio2 ◽  
Tio2 Nanorod ◽  
Tio2 Nanorod Arrays ◽  
Side Illumination ◽  
Photoelectrochemical Water Oxidation

TiO2 is one of the most attractive semiconductors for use as a photoanode for photoelectrochemical (PEC) water oxidation. However, the large-scale application of TiO2 photoanodes is restricted due to a short hole diffusion length and low electron mobility, which can be addressed by metal doping and surface decorating. In this paper we report the successful synthesis of hierarchical Ta doped TiO2 nanorod arrays, with nanoparticles on the top (Ta:TiO2), on F-doped tin oxide (FTO) glass by a hydrothermal method, and its application as photoanodes for photoelectrochemical water oxidation. It has been found that the incorporation of Ta5+ in the TiO2 lattice can decrease the diameter of surface TiO2 nanoparticles. Ta:TiO2-140, obtained with a moderate Ta concentration, yields a photocurrent of ∼1.36 mA cm−2 at 1.23 V vs. a reversible hydrogen electrode (RHE) under FTO side illumination. The large photocurrent is attributed to the large interface area of the surface TiO2 nanoparticles and the good electron conductivity due to Ta doping. Besides, the electron trap-free model illustrates that Ta:TiO2 affords higher transport speed and lower electron resistance when under FTO side illumination.

Nanoflower-like metallic conductive MoO2 as a high-performance non-precious metal electrocatalyst for the hydrogen evolution reaction

2015 ◽  
Vol 3 (40) ◽  
pp. 20080-20085 ◽  
Author(s):  
Yanshuo Jin ◽  
Pei Kang Shen
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Precious Metal ◽  
High Performance ◽  
High Stability ◽  
Reversible Hydrogen Electrode ◽  
Hydrogen Electrode ◽  
Onset Potential

The nanoflower-like MoO2 has been synthesized and the material shows high stability and activity toward hydrogen evolution with an onset potential of almost 0V versus the reversible hydrogen electrode (RHE).

Electrochemical and photoelectrochemical water splitting with a CoOx catalyst prepared by flame assisted deposition

2020 ◽  
Vol 49 (3) ◽  
pp. 588-592 ◽  
Author(s):  
Fusheng Li ◽  
Ziqi Zhao ◽  
Hao Yang ◽  
Dinghua Zhou ◽  
Yilong Zhao ◽  
...  
Keyword(s):  
Cobalt Oxide ◽  
Water Splitting ◽  
Water Oxidation ◽  
Oxide Catalyst ◽  
Photoelectrochemical Water Splitting ◽  
Deposition Method ◽  
Photoelectrochemical Water Oxidation

A cobalt oxide catalyst prepared by a flame-assisted deposition method on the surface of FTO and hematite for electrochemical and photoelectrochemical water oxidation, respectively.

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