Fabricating highly efficient heterostructured CuBi2O4 photocathodes for unbiased water splitting

2020 ◽  
Vol 8 (5) ◽  
pp. 2498-2504 ◽  
Author(s):  
Sabiha Akter Monny ◽  
Lei Zhang ◽  
Zhiliang Wang ◽  
Bin Luo ◽  
Muxina Konarova ◽  
...  
Keyword(s):  
Water Splitting ◽  
Photocurrent Density ◽  
Onset Potential ◽  
Highly Efficient ◽  
Splitting System

Efficient CuBi2O4 based photocathode with large onset potential (1.1 VSHE) and high photocurrent density (1.87 mA cm−2 at 0.6 VSHE) has been fabricated for constructing the unbiased water splitting system with the suitable photoanode.

A highly efficient and durable water splitting system: platinum sub-nanocluster functionalized nickel–iron layered double hydroxide as the cathode and hierarchical nickel–iron selenide as the anode

2019 ◽  
Vol 7 (6) ◽  
pp. 2831-2837 ◽  
Author(s):  
Qing Yan ◽  
Peng Yan ◽  
Tong Wei ◽  
Guiling Wang ◽  
Kui Cheng ◽  
...  
Keyword(s):  
Water Splitting ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Nickel Iron ◽  
Iron Selenide ◽  
Highly Efficient ◽  
Double Hydroxide ◽  
Double Hydroxides ◽  
Splitting System

A highly-efficient water splitting device is assembled with the platinum sub-nanoclusters functionalized nickel iron layered double hydroxides and hierarchical nickel iron selenides.

The synergetic effect of graphene on Cu2O nanowire arrays as a highly efficient hydrogen evolution photocathode in water splitting

2014 ◽  
Vol 2 (43) ◽  
pp. 18383-18397 ◽  
Author(s):  
Amare Aregahegn Dubale ◽  
Wei-Nien Su ◽  
Andebet Gedamu Tamirat ◽  
Chun-Jern Pan ◽  
Belete Asefa Aragaw ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Nanowire Array ◽  
Synergetic Effect ◽  
Photocurrent Density ◽  
Nanowire Arrays ◽  
Highly Efficient

The graphene modified Cu2O nanowire array demonstrates improved photocurrent density and photostability, attributed to the synergetic effect of graphene.

Sandwich structured WO3 nanoplatelets for highly efficient photoelectrochemical water splitting

2019 ◽  
Vol 7 (45) ◽  
pp. 26077-26088 ◽  
Author(s):  
Guangwei Zheng ◽  
Jinshu Wang ◽  
Guannan Zu ◽  
Haibing Che ◽  
Chen Lai ◽  
...  
Keyword(s):  
Water Splitting ◽  
Photocurrent Density ◽  
Photoelectrochemical Water Splitting ◽  
Highly Efficient ◽  
Pec Water Splitting

Promising PEC water splitting activity with a photocurrent density of 3.16 mA cm−2 at 1.23 V vs. RHE was demonstrated in sandwich structured WO3 with exposed highly reactive (002) facet and superior crystallinity of 2-D nanoplatelets.

scholarly journals Direct growth of uniform carbon nitride layers with extended optical absorption towards efficient water-splitting photoanodes

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Jiani Qin ◽  
Jesús Barrio ◽  
Guiming Peng ◽  
Jonathan Tzadikov ◽  
Liel Abisdris ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Water Splitting ◽  
Carbon Nitride ◽  
Photophysical Properties ◽  
Photocurrent Density ◽  
Nitride Layer ◽  
Universal Method ◽  
Intimate Contact ◽  
Faradaic Efficiency ◽  
Onset Potential

Abstract A general synthesis of carbon nitride (CN) films with extended optical absorption, excellent charge separation under illumination, and outstanding performance as a photoanode in water-splitting photoelectrochemical cells is reported. To this end, we introduced a universal method to rapidly grow CN monomers directly from a hot saturated solution on various substrates. Upon calcination, a highly uniform carbon nitride layer with tuned structural and photophysical properties and in intimate contact with the substrate is obtained. Detailed photoelectrochemical and structural studies reveal good photoresponse up to 600 nm, excellent hole extraction efficiency (up to 62%) and strong adhesion of the CN layer to the substrate. The best CN photoanode demonstrates a benchmark-setting photocurrent density of 353 µA cm−2 (51% faradaic efficiency for oxygen), and external quantum yield value above 12% at 450 nm at 1.23 V versus RHE in an alkaline solution, as well as low onset potential and good stability.

Powder-based (CuGa1−yIny)1−xZn2xS2 solid solution photocathodes with a largely positive onset potential for solar water splitting

2018 ◽  
Vol 2 (9) ◽  
pp. 2016-2024 ◽  
Author(s):  
Toshio Hayashi ◽  
Ryo Niishiro ◽  
Hitoshi Ishihara ◽  
Masaharu Yamaguchi ◽  
Qingxin Jia ◽  
...  
Keyword(s):  
Solid Solution ◽  
Water Splitting ◽  
Simulated Sunlight ◽  
Sunlight Irradiation ◽  
Onset Potential ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Highly Efficient

(CuGa1−yIny)1−xZn2xS2 has arisen as a highly efficient powder-based photocathode for water splitting under simulated sunlight irradiation.

Rapid activation of Co3O4 cocatalysts with oxygen vacancies on TiO2 photoanodes for efficient water splitting

2018 ◽  
Vol 6 (42) ◽  
pp. 21003-21009 ◽  
Author(s):  
Guojun Dong ◽  
Hongyan Hu ◽  
Xiaojuan Huang ◽  
Yajun Zhang ◽  
Yingpu Bi
Keyword(s):  
Plasma Treatment ◽  
Water Splitting ◽  
Oxygen Vacancies ◽  
Photocurrent Density ◽  
Efficient Strategy ◽  
Highly Efficient ◽  
Ar Plasma ◽  
Rapid Activation

Herein, we demonstrate a rapid and highly efficient strategy for rationally constructing oxygen vacancies on Co3O4 cocatalysts by Ar-plasma treatment, and the photocurrent density could be achieved up to 2.5 mA cm−2 (1.23 VRHE) under AM 1.5G irradiation (100 mW cm−2).

Fabrication of Ti3C2@MoO3 nanocomposite as an electrode material for highly efficient and durable water splitting system

Fuel ◽  
2021 ◽  
Vol 299 ◽  
pp. 120928
Author(s):  
Iffat Ashraf ◽  
Saba Ahmad ◽  
Syed Rizwan ◽  
Mudassir Iqbal
Keyword(s):  
Water Splitting ◽  
Electrode Material ◽  
Highly Efficient ◽  
Splitting System

scholarly journals NiFeOx decorated Ge-hematite/perovskite for an efficient water splitting system

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ki-Yong Yoon ◽  
Juhyung Park ◽  
Minsu Jung ◽  
Sang-Geun Ji ◽  
Hosik Lee ◽  
...  
Keyword(s):  
Water Splitting ◽  
Water Oxidation ◽  
Photocurrent Density ◽  
Photoelectrochemical Performance ◽  
Co Doping ◽  
Solar Water Splitting ◽  
Oxidation Performance ◽  
Oxide Substrate ◽  
Splitting System ◽  
Co Doped

AbstractTo boost the photoelectrochemical water oxidation performance of hematite photoanodes, high temperature annealing has been widely applied to enhance crystallinity, to improve the interface between the hematite-substrate interface, and to introduce tin-dopants from the substrate. However, when using additional dopants, the interaction between the unintentional tin and intentional dopant is poorly understood. Here, using germanium, we investigate how tin diffusion affects overall photoelectrochemical performance in germanium:tin co-doped systems. After revealing that germanium is a better dopant than tin, we develop a facile germanium-doping method which suppresses tin diffusion from the fluorine doped tin oxide substrate, significantly improving hematite performance. The NiFeOx@Ge-PH photoanode shows a photocurrent density of 4.6 mA cm−2 at 1.23 VRHE with a low turn-on voltage. After combining with a perovskite solar cell, our tandem system achieves 4.8% solar-to-hydrogen conversion efficiency (3.9 mA cm−2 in NiFeOx@Ge-PH/perovskite solar water splitting system). Our work provides important insights on a promising diagnostic tool for future co-doping system design.

scholarly journals Nitrogen-incorporation activates NiFeOx catalysts for efficiently boosting oxygen evolution activity and stability of BiVO4 photoanodes

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Beibei Zhang ◽  
Shiqiang Yu ◽  
Ying Dai ◽  
Xiaojuan Huang ◽  
Lingjun Chou ◽  
...  
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Low Cost ◽  
Photocurrent Density ◽  
Partial Substitution ◽  
Hydrogen Electrode ◽  
Highly Efficient ◽  
Promising Strategy ◽  
N Incorporation ◽  
Pec Water Splitting

AbstractDeveloping low-cost and highly efficient catalysts toward the efficient oxygen evolution reaction (OER) is highly desirable for photoelectrochemical (PEC) water splitting. Herein, we demonstrated that N-incorporation could efficiently activate NiFeOx catalysts for significantly enhancing the oxygen evolution activity and stability of BiVO4 photoanodes, and the photocurrent density has been achieved up to 6.4 mA cm−2 at 1.23 V (vs. reversible hydrogen electrode (RHE), AM 1.5 G). Systematic studies indicate that the partial substitution of O sites in NiFeOx catalysts by low electronegative N atoms enriched the electron densities in both Fe and Ni sites. The electron-enriched Ni sites conversely donated electrons to V sites of BiVO4 for restraining V5+ dissolution and improving the PEC stability, while the enhanced hole-attracting ability of Fe sites significantly promotes the oxygen-evolution activity. This work provides a promising strategy for optimizing OER catalysts to construct highly efficient and stable PEC water splitting devices.

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.

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