Ni3Co/G alloy as an earth-abundant robust and stable electrocatalyst for the hydrogen evolution reaction

2017 ◽  
Vol 41 (13) ◽  
pp. 5916-5923 ◽  
Author(s):  
Soumen Saha ◽  
Kasinath Ojha ◽  
Manu Sharma ◽  
Ashok K. Ganguli
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Media ◽  
Nickel Cobalt ◽  
Earth Abundant

Nickel-rich nickel–cobalt–graphene alloy was fabricated with outstanding catalytic activity and stability towards HER in alkaline media.

Copper dopants improved the hydrogen evolution activity of earth-abundant cobalt pyrite catalysts by activating the electrocatalytically inert sulfur sites

2017 ◽  
Vol 5 (33) ◽  
pp. 17601-17608 ◽  
Author(s):  
Jingyan Zhang ◽  
Baorui Xiao ◽  
Xiaoli Liu ◽  
Peitao Liu ◽  
Pinxian Xi ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Catalytic Activity ◽  
Earth Abundant

Cobalt pyrite (CoS2) is considered to be a promising catalyst for the hydrogen evolution reaction (HER) due to its intrinsic metallicity and high catalytic activity.

Ultrasmall Ru2P nanoparticles on graphene: a highly efficient hydrogen evolution reaction electrocatalyst in both acidic and alkaline media

2018 ◽  
Vol 54 (27) ◽  
pp. 3343-3346 ◽  
Author(s):  
Tingting Liu ◽  
Shuo Wang ◽  
Qiuju Zhang ◽  
Liang Chen ◽  
Weihua Hu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Media ◽  
Graphene Oxide Nanosheets ◽  
Reduced Graphene ◽  
Alkaline Conditions ◽  
Acidic And Alkaline Media

A Pt-free catalyst of ultrasmall Ru2P nanoparticles on reduced graphene oxide nanosheets (Ru2P/RGO-20) shows remarkable HER catalytic activity under acidic and alkaline conditions, respectively, both superior to those of commercial Pt/C.

scholarly journals Facile Synthesis of PdCuRu Porous Nanoplates as Highly Efficient Electrocatalysts for Hydrogen Evolution Reaction in Alkaline Medium

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1451
Author(s):  
Changhong Chen ◽  
Ningkang Qian ◽  
Junjie Li ◽  
Xiao Li ◽  
Deren Yang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Solution ◽  
Current Density ◽  
Alkaline Media ◽  
Water Dissociation ◽  
Galvanic Replacement ◽  
Facile Synthesis ◽  
Better Than

Ru is a key component of electrocatalysts for hydrogen evolution reaction (HER), especially in alkaline media. However, the catalytic activity and durability of Ru-based HER electrocatalysts are still far from satisfactory. Here we report a solvothermal approach for the synthesis of PdCuRu porous nanoplates with different Ru compositions by using Pd nanoplates as the seeds. The PdCuRu porous nanoplates were formed through underpotential deposition (UPD) of Cu on Pd, followed by alloying Cu with Pd through interdiffusion and galvanic replacement between Cu atoms and Ru precursor simultaneously. When evaluated as HER electrocatalysts, the PdCuRu porous nanoplates exhibited excellent catalytic activity and durability. Of them, the Pd24Cu29Ru47/C achieved the lowest overpotential (40.7 mV) and smallest Tafel slope (37.5 mV dec−1) in an alkaline solution (much better than commercial Pt/C). In addition, the Pd24Cu29Ru47/C only lost 17% of its current density during a stability test for 10 h, while commercial Pt/C had a 59.5% drop under the same conditions. We believe that the electron coupling between three metals, unique porous structure, and strong capability of Ru for water dissociation are responsible for such an enhancement in HER performance.

Superhydrophilic amorphous Co–B–P nanosheet electrocatalysts with Pt-like activity and durability for the hydrogen evolution reaction

2018 ◽  
Vol 6 (44) ◽  
pp. 22062-22069 ◽  
Author(s):  
Hongming Sun ◽  
Xiaobin Xu ◽  
Zhenhua Yan ◽  
Xiang Chen ◽  
Lifang Jiao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Media

Superhydrophilic ternary Co–B–P nanosheets are developed as a hydrogen evolution electrocatalyst showing Pt-like catalytic activity and superior stability in alkaline media.

A review on nickel cobalt sulphide and their hybrids: Earth abundant, pH stable electro-catalyst for hydrogen evolution reaction

2020 ◽  
Vol 45 (46) ◽  
pp. 24518-24543 ◽  
Author(s):  
Rubab Zahra ◽  
Erum Pervaiz ◽  
Minghui Yang ◽  
Osama Rabi ◽  
Zubia Saleem ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Nickel Cobalt ◽  
Cobalt Sulphide ◽  
Earth Abundant

scholarly journals Design of Highly Active Electrodes for Hydrogen Evolution Reaction Based on Mo-Rich Alloys Electrodeposited from Ammonium Acetate Bath

Coatings ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 85 ◽  
Author(s):  
Edita Vernickaitė ◽  
Oksana Bersirova ◽  
Henrikas Cesiulis ◽  
Natalia Tsyntsaru
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Active Sites ◽  
Ammonium Acetate ◽  
Alkaline Media ◽  
Molar Ratio ◽  
Cathodic Current ◽  
Catalytic Behavior

The given research was driven by prospects to design Mo-rich coatings with iron group metals electrodeposited from a highly saturated ammonium acetate bath. The obtained coatings could be employed as prominent electrodes for the hydrogen evolution reaction (HER). It was found that the Mo content in Ni–Mo alloys can be tuned from 30 to 78 at.% by decreasing the molar ratio [Ni(II)]:[Mo(VI)] in the electrolyte from 1.0 to 0.25 and increasing the cathodic current density from 30 to 100 mA/cm2. However, dense cracks and pits are formed due to hydrogen evolution at high current densities and that diminishes the catalytic activity of the coating for HER. Accordingly, smoother and crack-free Ni–54 at.% Mo, Co–52 at.% Mo and Fe–54 at.% Mo alloys have been prepared at 30 mA/cm2. Their catalytic behavior for HER has been investigated in a 30 wt.% NaOH solution at temperatures ranging from 25 to 65 °C. A significant improvement of electrocatalytic activity with increasing bath temperature was noticed. The results showed that the sequence of electrocatalytic activity in alkaline media decreases in the following order: Co–52 at.% Mo > Ni–54 at.% Mo > Fe–54 at.% Mo. These peculiarities might be linked with different catalytic behavior of formed intermetallics (and active sites) in electrodeposited alloys. The designed electrodeposited Mo-rich alloys have a higher catalytic activity than Mo and Pt cast metals.

Coralline-like CoP3@Cu as an efficient electrocatalyst for the hydrogen evolution reaction in acidic and alkaline solutions

2020 ◽  
Vol 44 (43) ◽  
pp. 18601-18607 ◽  
Author(s):  
Mengyu Hou ◽  
Ying Xu ◽  
Xi Li ◽  
Yongzhi Dong ◽  
Fengke Sun ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Media ◽  
Alkaline Solutions ◽  
Acidic And Alkaline Media

CoP3@Cu/Cu exhibited excellent catalytic activity and stability in acidic and alkaline media.

Mixed MoS2/MoO3 Nanostructures for Hydrogen Evolution Reaction

2021 ◽  
Vol 21 (4) ◽  
pp. 2500-2510
Author(s):  
Umair Aftab ◽  
Hamza Majeed Ansari ◽  
Muhammad Ishaque Abro ◽  
Muhmmad Moazam Baloch ◽  
Sirajuddin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Low Cost ◽  
Future Generation ◽  
Superior Performance ◽  
Sulfur Source ◽  
The Future ◽  
Earth Abundant ◽  
Future Technologies

The electrolysis of water has paved the way towards a clean, efficient and renewable energy source for the future technologies. Therefore, an efficient electrocatalyst is needed. MoS2 based nonprecious materials are earth-abundant, low cost and promising for the hydrogen evolution reaction. In this study, the effect of sulfur source on the catalytic properties of the MoS2 nanostructures is investigated. Two different sulfur precursors (i.e., thiourea and L-cysteine) were used for the synthesis of MoS2 nanostructures. The optimization of the sulfur precursor content was carried out to report the best for the development of the future generation of HER catalysts. The cysteine assisted synthesis results the mixed MoO3/MoS2 composite structure which has shown significant effect on the catalytic activity. The low concentrations of cysteine and thiourea have shown excellent catalytic activity and stability in 0.5 M H2SO4. TheMoS2 nanostructures with the cysteine as sulfur precursor have shown low Tafel slope of 81 mV dec-1 and a current density of 30 mA cm-2 is obtained at 0.45 V versus RHE. The superior performance of cysteine-based MoS2 sample is due to the rapid charge transfer as confirmed by EIS and excellent conductivity as witnessed by low optical band gap. These findings strengthen the understanding of fundamental science of Mo-based catalysts for the development of the future generation of electrocatalysts and energy conversion technologies.

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