Interfacial engineering of Mo2C–Mo3C2 heteronanowires for high performance hydrogen evolution reactions

Nanoscale ◽  
2019 ◽  
Vol 11 (48) ◽  
pp. 23318-23329 ◽  
Author(s):  
Lina Jia ◽  
Chen Li ◽  
Yaru Zhao ◽  
Bitao Liu ◽  
Shixiu Cao ◽  
...  
Keyword(s):  
High Activity ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Precious Metal ◽  
High Performance ◽  
Large Scale ◽  
Low Cost ◽  
Critical Importance ◽  
Interfacial Engineering ◽  
Hydrogen Evolution Reactions

Non-precious metal-based electrocatalysts with high activity and stability for efficient hydrogen evolution reactions are of critical importance for low-cost and large-scale water splitting.

A Low-cost 2D WO3/Ni3S2 heterojunctions for highly stable hydrogen evolution

2021 ◽  
Author(s):  
Minmin Wang ◽  
Tongming Sun ◽  
Weiting Zhong ◽  
Mengke Zhang ◽  
Jin Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hydrogen Evolution ◽  
Tungsten Trioxide ◽  
Precious Metal ◽  
Low Cost ◽  
Metal Catalysts ◽  
Precious Metal Catalysts ◽  
Hydrogen Evolution Reactions

Transition metal-based nanohybrid has recently been demonstrated an electrocatalyst which show great potential to replace commercial precious metal catalysts in hydrogen evolution reactions. Herein, tungsten trioxide/nickel disulfide (WO3/Ni3S2) heterojunction is...

Al-doped nickel sulfide nanosheet arrays as highly efficient bifunctional electrocatalysts for overall water splitting

Nanoscale ◽  
2020 ◽  
Vol 12 (47) ◽  
pp. 24244-24250
Author(s):  
Wenjun He ◽  
Fangqing Wang ◽  
Dongbo Jia ◽  
Ying Li ◽  
Limin Liang ◽  
...  
Keyword(s):  
High Activity ◽  
Water Splitting ◽  
Precious Metal ◽  
Nickel Sulfide ◽  
Low Cost ◽  
Water Electrolysis ◽  
Overall Water Splitting ◽  
Bifunctional Electrocatalysts ◽  
Nanosheet Arrays ◽  
Production Of Hydrogen

The development of low-cost, high-activity, durable non-precious metal bifunctional electrocatalysts is of great importance in the production of hydrogen by water electrolysis.

Efficient water splitting catalyzed by flexible NiP2 nanosheet array electrodes under both neutral and alkaline solutions

2017 ◽  
Vol 41 (5) ◽  
pp. 2154-2159 ◽  
Author(s):  
Zonghua Pu ◽  
Ya Xue ◽  
Wenqiang Li ◽  
Ibrahim Saana Amiinu ◽  
Shichun Mu
Keyword(s):  
High Activity ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Alkaline Solutions ◽  
Nanosheet Array ◽  
Hydrogen Evolution Reactions

NiP2/CC exhibits high activity and stability under both neutral and alkaline solutions towards both oxygen and hydrogen evolution reactions.

Low-cost and Multi-level Structured NiFeMn Alloy@NiFeMn Oxyhydroxide Electrocatalysts for Highly-efficient Overall Water Splitting

2021 ◽  
Author(s):  
Zeyu Ge ◽  
Fei Wang ◽  
Junji Guo ◽  
Jungang Ma ◽  
Chunyan Yu ◽  
...  
Keyword(s):  
Energy Saving ◽  
High Activity ◽  
Water Splitting ◽  
Electrochemical Deposition ◽  
Large Scale ◽  
Low Cost ◽  
Industrial Applications ◽  
Significant Challenge ◽  
Overall Water Splitting ◽  
Multi Level

Fabricating energy-saving, inexpensive and high activity electrocatalysts for overall water splitting has always been a significant challenge. Electrochemical deposition is considered as a promising method for large-scale industrial applications, but...

scholarly journals Study of Activity and Super-Capacitance Exhibited by Bifunctional Raney 2.0 Catalyst for Alkaline Water-Splitting Electrolysis

Hydrogen ◽  
2020 ◽  
Vol 2 (1) ◽  
pp. 1-17
Author(s):  
William J. F. Gannon ◽  
Charles W. Dunnill
Keyword(s):  
Hydrogen Production ◽  
Water Splitting ◽  
High Performance ◽  
Large Scale ◽  
Low Cost ◽  
Electrochemical Techniques ◽  
Bifunctional Electrocatalyst ◽  
Energy Capture ◽  
A New Technique ◽  
Alkaline Electrolysis

Low-cost, high-performance coatings for hydrogen production via electrolytic water-splitting are of great importance for de-carbonising energy. In this study the Raney2.0 coating was analysed using various electrochemical techniques to assess its absolute performance, and it was confirmed to have an extremely low overpotential for hydrogen evolution of just 28 mV at 10 mA/cm2. It was also confirmed to be an acceptable catalyst for oxygen evolution, making it the highest performing simple bifunctional electrocatalyst known. The coating exhibits an extremely high capacitance of up to 1.7 F/cm2, as well as being able to store 0.61 J/cm2 in the form of temporary hydride deposits. A new technique is presented that performs a best-fit of a transient simulation of an equivalent circuit containing a constant phase element to cyclic voltammetry measurements. From this the roughness factor of the coating was calculated to be approximately 40,000, which is the highest figure ever reported for this type of material. The coating is therefore an extremely useful improved bifunctional coating for the continued roll-out of alkaline electrolysis for large-scale renewable energy capture via hydrogen production.

Titanium Nitride As a Conducting Interfacial Layer between Hydrogen Evolution Catalysts and Silicon Photocathodes for Stable Solar-to-Hydrogen Water Splitting Devices

2018 ◽  
Vol MA2018-01 (31) ◽  
pp. 1903-1903
Author(s):  
Shinjae Hwang ◽  
Anders B. Laursen ◽  
Spencer H Porter ◽  
Yang Hongbin ◽  
Mengjun Li ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
High Performance ◽  
Low Cost ◽  
Electrical Potential ◽  
Photocurrent Density ◽  
Atomic Diffusion ◽  
Stable Operation ◽  
Liquid Junction ◽  
Stable Performance

The development of a solar-driven water splitting device that replaces costly noble metal electrodes, while achieving high performance and stable operation, is a major challenge. Transition metal phosphides (TMP) are being developed as low-cost hydrogen evolution reaction (HER) catalysts, but no reports have demonstrated their successful integration with a photoabsorber achieving stable performance in liquid junction electrolytes. Here, we report on a monolithic junction consisting of cubic-NiP2 HER catalyst : TiN ultrathin-film : Si photoabsorber. Crystalline TiN creates an electron conducting, near-transparent film that effectively hinders atomic diffusion during fabrication and maintains stable interfaces. Crystalline cubic-NiP2 on TiN/n+p-Si retains 97% of the bare Si’s photovoltage, a comparable Jsc to bare Si, and achieves a turnover frequency of 1.04 H2 site-1s−1 at −100 mV applied electrical potential. When used in 0.5 M H2SO4 it requires only −150 mV overpotential beyond Pt/TiN/n+p-Si benchmark to reach an HER photocurrent density of −10 mA/cm2. This photocathode maintains a stable H2 photocurrent (±10%) for at least 125 hours, the duration of test. Transmission electron microscopy, voltammetry, ion scattering, AFM and XPS give information on the physical properties responsible for the observed activity and stable performance of these interfaces.

Interfacial engineering of nickel/iron/ruthenium phosphides for efficient overall water splitting powered by solar energy

2021 ◽  
Author(s):  
Sheng-Hao Cai ◽  
Xiao-Nan Chen ◽  
Meng-Jie Huang ◽  
Ji-Yuan Han ◽  
Yu-Wei Zhou ◽  
...  
Keyword(s):  
Solar Energy ◽  
Water Splitting ◽  
High Performance ◽  
Low Cost ◽  
Bifunctional Catalysts ◽  
Nickel Iron ◽  
Interfacial Engineering ◽  
Overall Water Splitting ◽  
Electrochemical Water Splitting

Exploiting high-performance, low-cost, and robust bifunctional catalysts toward electrochemical water splitting is of great importance, but remains challenging. Herein, a novel hybrid electrocatalyst of Ni-Fe-Ru-based phosphide heterostructures directly grown on...

Rational design of NixCoyP@C cocatalyst for enhanced overall water splitting based on g-C3N4 photocatalyst — the synergy of carbon-shell modification and bimetal modulation

2022 ◽  
Author(s):  
Tingfeng Zhang ◽  
Xuefang Lan ◽  
Lili Wang ◽  
Jinsheng Shi ◽  
Kefeng Xiao
Keyword(s):  
Solar Energy ◽  
Water Splitting ◽  
High Performance ◽  
Rational Design ◽  
Large Scale ◽  
Low Cost ◽  
H2 Production ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Developing high-performance and low-cost cocatalyst is crucial to realize large-scale H2 production using solar energy. Herein, a non-precious NixCoy-P@C core-shell nanoparticles (NPs) is synthesized as a high active cocatalyst for...

Highly Efficient Bifunctional Electrocatalyst (ORR/OER) Derived from GO Functionalized with Carbonyl, Hydroxyl and Epoxy Groups for Rechargeable Zinc-Air Batteries

2021 ◽  
Author(s):  
Lei Gu ◽  
Xuan-Long Sun ◽  
Jiao Zhao ◽  
Bing-Quan Gong ◽  
Zheng-Lv Bao ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Activity ◽  
Water Splitting ◽  
High Performance ◽  
Low Cost ◽  
Bifunctional Electrocatalyst ◽  
Highly Efficient ◽  
Air Battery ◽  
Epoxy Groups ◽  
Zinc Air Batteries

Electrocatalysts play an important role in fuel cells, metal-air battery and water-splitting devices. The development of low cost, high activity and high performance bifunctional electrocatalysts for ORR and OER is...

scholarly journals Wittichenite semiconductor of Cu3BiS3 films for efficient hydrogen evolution from solar driven photoelectrochemical water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dingwang Huang ◽  
Lintao Li ◽  
Kang Wang ◽  
Yan Li ◽  
Kuang Feng ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Low Cost ◽  
Solar Hydrogen ◽  
Onset Potential ◽  
Term Stability ◽  
Long Term Stability ◽  
Solar Water Splitting ◽  
Current Densities

AbstractA highly efficient, low-cost and environmentally friendly photocathode with long-term stability is the goal of practical solar hydrogen evolution applications. Here, we found that the Cu3BiS3 film-based photocathode meets the abovementioned requirements. The Cu3BiS3-based photocathode presents a remarkable onset potential over 0.9 VRHE with excellent photoelectrochemical current densities (~7 mA/cm2 under 0 VRHE) and appreciable 10-hour long-term stability in neutral water solutions. This high onset potential of the Cu3BiS3-based photocathode directly results in a good unbiased operating photocurrent of ~1.6 mA/cm2 assisted by the BiVO4 photoanode. A tandem device of Cu3BiS3-BiVO4 with an unbiased solar-to-hydrogen conversion efficiency of 2.04% is presented. This tandem device also presents high stability over 20 hours. Ultimately, a 5 × 5 cm2 large Cu3BiS3-BiVO4 tandem device module is fabricated for standalone overall solar water splitting with a long-term stability of 60 hours.

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