A self-supported NiMoS4 nanoarray as an efficient 3D cathode for the alkaline hydrogen evolution reaction

2017 ◽  
Vol 5 (32) ◽  
pp. 16585-16589 ◽  
Author(s):  
Weiyi Wang ◽  
Lin Yang ◽  
Fengli Qu ◽  
Zhiang Liu ◽  
Gu Du ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Hydrothermal Conversion ◽  
Current Densities ◽  
3D Cathode ◽  
Ti Mesh

A NiMoS4 nanoarray on Ti mesh (NiMoS4/Ti), developed via topotactic hydrothermal conversion from its Ni(OH)2 nanoarray (Ni(OH)2/Ti), drives hydrogen-evolution current densities of 10 and 50 mA cm−2 at overpotentials of 194 and 263 mV in 0.1 M KOH, respectively.

N-doped carbon-coated cobalt nanorod arrays supported on a titanium mesh as highly active electrocatalysts for the hydrogen evolution reaction

2015 ◽  
Vol 3 (5) ◽  
pp. 1915-1919 ◽  
Author(s):  
Weijia Zhou ◽  
Yucheng Zhou ◽  
Linjing Yang ◽  
Jilin Huang ◽  
Yunting Ke ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Robust Stability ◽  
Hydrogen Evolution Reaction ◽  
Nanorod Arrays ◽  
Titanium Mesh ◽  
Tafel Slope ◽  
Highly Active ◽  
Carbon Coated ◽  
Ti Mesh

N-doped carbon-coated cobalt nanorod arrays on a Ti mesh exhibited efficient HER performance with an overpotential of −56 mV, a Tafel slope of 78.2 mV dec−1 and robust stability.

Efficient alkaline hydrogen evolution electrocatalysis enabled by an amorphous Co–Mo–B film

2018 ◽  
Vol 47 (23) ◽  
pp. 7640-7643 ◽  
Author(s):  
Zhaomei Sun ◽  
Shuai Hao ◽  
Xuqiang Ji ◽  
Xiangjiang Zheng ◽  
Junfeng Xie ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Ti Mesh

An amorphous Co–Mo–B film on a Ti mesh (Co–Mo–B/Ti) acts as a durable hydrogen evolution reaction electrocatalyst with an overpotential of 110 mV to drive 20 mA cm−2 in 1.0 M KOH.

A 3D Co–CN framework as a high performance electrocatalyst for the hydrogen evolution reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 42014-42018 ◽  
Author(s):  
Jie Chen ◽  
Haifeng Zhou ◽  
Yongjun Huang ◽  
Huiwu Yu ◽  
Fuying Huang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Performance ◽  
High Catalytic Activity ◽  
Alkaline Electrolytes ◽  
Current Densities

A 3D Co–CN framework was synthesized with the Co–CN electrode showing exceptionally high catalytic activity and good durability. Only requiring overpotentials of 181 mV and 266 mV to afford current densities of 10 mA cm−2 in acid and alkaline electrolytes, respectively.

scholarly journals Increasing the rate of the hydrogen evolution reaction in neutral water with protic buffer electrolytes

2020 ◽  
Vol 117 (52) ◽  
pp. 32947-32953
Author(s):  
Kayla E. Clary ◽  
Metin Karayilan ◽  
Keelee C. McCleary-Petersen ◽  
Haley A. Petersen ◽  
Richard S. Glass ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Sodium Phosphate ◽  
Primary Source ◽  
Phosphate Solution ◽  
Catalytic Current ◽  
Structure Activity ◽  
Proton Source ◽  
Sodium Phosphate Solution ◽  
Current Densities

Electrocatalytic generation of H2 is challenging in neutral pH water, where high catalytic currents for the hydrogen evolution reaction (HER) are particularly sensitive to the proton source and solution characteristics. A tris(hydroxymethyl)aminomethane (TRIS) solution at pH 7 with a [2Fe-2S]-metallopolymer electrocatalyst gave catalytic current densities around two orders of magnitude greater than either a more conventional sodium phosphate solution or a potassium chloride (KCl) electrolyte solution. For a planar polycrystalline Pt disk electrode, a TRIS solution at pH 7 increased the catalytic current densities for H2 generation by 50 mA/cm2 at current densities over 100 mA/cm2 compared to a sodium phosphate solution. As a special feature of this study, TRIS is acting not only as the primary source of protons and the buffer of the pH, but the protonated TRIS ([TRIS-H]+) is also the sole cation of the electrolyte. A species that is simultaneously the proton source, buffer, and sole electrolyte is termed a protic buffer electrolyte (PBE). The structure–activity relationships of the TRIS PBE that increase the HER rate of the metallopolymer and platinum catalysts are discussed. These results suggest that appropriately designed PBEs can improve HER rates of any homogeneous or heterogeneous electrocatalyst system. General guidelines for selecting a PBE to improve the catalytic current density of HER systems are offered.

Ni(OH)2–Fe2P hybrid nanoarray for alkaline hydrogen evolution reaction with superior activity

2018 ◽  
Vol 54 (10) ◽  
pp. 1201-1204 ◽  
Author(s):  
Xiaoping Zhang ◽  
Shuyun Zhu ◽  
Lian Xia ◽  
Chongdian Si ◽  
Fei Qu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Ti Mesh

Ni(OH)2–Fe2P nanoarray on Ti mesh (Ni(OH)2–Fe2P/TM) acts as a superior electrocatalyst for hydrogen evolution reaction, requiring an overpotential of 76 mV to drive 10 mA cm−2 in 1.0 M KOH.

scholarly journals Cobalt diselenide nanobelts grafted on carbon fiber felt: an efficient and robust 3D cathode for hydrogen production

2015 ◽  
Vol 6 (8) ◽  
pp. 4594-4598 ◽  
Author(s):  
Ya-Rong Zheng ◽  
Min-Rui Gao ◽  
Zi-You Yu ◽  
Qiang Gao ◽  
Huai-Ling Gao ◽  
...  
Keyword(s):  
Carbon Fiber ◽  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Highly Active ◽  
Carbon Fiber Felt ◽  
3D Cathode

An easily scaled-up 3D CoSe2/CFF hierarchical electrode has been developed as a highly active and stable hydrogen evolution reaction cathode.

scholarly journals Pencil Graphite Electrodes Decorated with Platinum Nanoparticles as Efficient Electrocatalysts for Hydrogen Evolution Reaction

Materials ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 73
Author(s):  
Lorena-Cristina Balint ◽  
Iosif Hulka ◽  
Andrea Kellenberger
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Current Density ◽  
Platinum Nanoparticles ◽  
Electrocatalytic Activity ◽  
Linear Sweep Voltammetry ◽  
Alternative Methods ◽  
Graphite Electrodes ◽  
Electrochemically Deposited ◽  
Current Densities

Platinum-based materials are widely known as the most utilized and advanced catalysts for hydrogen evolution reaction. For this reason, several studies have reported alternative methods of incorporating this metal into more economical electrodes with a carbon-based support material. Herein, we report on the performance of pencil graphite electrodes decorated with electrochemically deposited platinum nanoparticles as efficient electrocatalysts for hydrogen evolution reaction. The electrodeposition of platinum was performed via pulsed current electrodeposition and the effect of current density on the electrocatalytic activity was investigated. The obtained electrodes were characterized using cyclic voltammetry, while the electrocatalytic activity was assessed through linear sweep voltammetry. Field emission scanning electron microscopy and energy-dispersive X-ray spectroscopy were utilised to gain an insight into surface morphology and chemical analysis of platinum nanoparticles. The best performing electrocatalyst, at both low and high current densities, was characterized by the highest exchange current density of 1.98 mA cm−2 and an ultralow overpotential of 43 mV at a current density of 10 mA cm−2. The results show that, at low current densities, performances closest to that of platinum can be achieved even with an ultralow loading of 50 µg cm−2 Pt.

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