Insight into the electrochemical activation of carbon-based cathodes for hydrogen evolution reaction

2015 ◽  
Vol 3 (24) ◽  
pp. 13080-13086 ◽  
Author(s):  
Guofa Dong ◽  
Ming Fang ◽  
Hongtao Wang ◽  
Senpo Yip ◽  
Ho-Yuen Cheung ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Counter Electrode ◽  
Electrochemical Activation ◽  
Electrochemical Tests ◽  
Pt Dissolution ◽  
Insight Into ◽  
Carbon Based

The anodic Pt dissolution, although widely ignored, should be taken into consideration during electrochemical tests when Pt metal is utilized as the counter electrode.

scholarly journals Electrochemically Induced In-Situ Generated Co(OH)2 Nanoplates to Promote the Volmer Process Toward Efficient Alkaline Hydrogen Evolution Reaction

2020 ◽  
Author(s):  
Hong Liu ◽  
Jian-Jun Wang ◽  
Li-Wen Jiang ◽  
Yuan Huang ◽  
Bing Bing Chen ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Water Electrolysis ◽  
Water Dissociation ◽  
Alkaline Water Electrolysis ◽  
Additional Water ◽  
Dissociation Step ◽  
Insight Into

<p>Hydrogen production via alkaline water electrolysis is of significant interest. However, the additional water dissociation step makes the Volmer step a relatively more sluggish kinetics and consequently leads to a slower reaction rate than that in acidic solution. Herein, we demonstrate an effective strategy that Co(OH)<sub>2</sub> can promote the Volmer process by accelerating water dissociation and enhance the electrocatalytic performance of CoP toward alkaline hydrogen evolution reaction. The Co(OH)<sub>2</sub> nanoplates are electrochemically induced in-situ generated to form a nanotree-like structure with porous CoP nanowires, endowing the hybrid electrocatalyst with superior charge transportation, more exposed active sites, and enhanced reaction kinetics. This strategy may be extended to <a></a><a>other phosphides and chalcogenides </a>and provide insight into the design and fabrication of efficient alkaline HER catalysts.</p>

Insight into the hydrogen evolution reaction of nickel dichalcogenide nanosheets: activities related to non-metal ligands

Nanoscale ◽  
2017 ◽  
Vol 9 (17) ◽  
pp. 5538-5544 ◽  
Author(s):  
Yuancai Ge ◽  
Shang-Peng Gao ◽  
Pei Dong ◽  
Robert Baines ◽  
Pulickel M. Ajayan ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Metal Ligands ◽  
Insight Into

Controllable synthesis of Mo2C with different morphology and application to electrocatalytic hydrogen evolution reaction

2021 ◽  
Author(s):  
He-qiang Chang ◽  
Guo-Hua Zhang ◽  
Kuo-Chih Chou
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Structural Design ◽  
Superior Performance ◽  
Controllable Synthesis ◽  
Nitridation Reaction ◽  
Special Surface ◽  
One Step ◽  
The One ◽  
Insight Into

Abstract In order to evaluate the effect of precursors and synthesis strategies on catalytic ability of Mo2C in the hydrogen evolution reaction (HER), four kinds of Mo2C were synthesized using two kinds of MoO3 by two strategies. Compared with the one-step direct carbonization strategy, Mo2C with a large special surface area and a better performance could be synthesized by the two-step strategy composed of a nitridation reaction and a carbonization reaction. Additionally, the as-prepared porous Mo2C nanobelts (NBs) exhibit good electrocatalytic performance with a small overpotential of 165 mV (0.5 M H2SO4) and 124 mV (1 M KOH) at 10 mA cm-2, as well as a Tafel slope of 58 mV dec-1 (0.5 M H2SO4) and 59 mV dec-1 (1 M KOH). The excellent catalytic activity is ascribed to the nano crystallites and porous structure. What’s more, the belt structure also facilitates the charge transport in the materials during the electrocatalytic HER process. Therefore, the two-step strategy provides a new insight into the structural design with superior performance for electrocatalytic HER.

scholarly journals Copper-Doped Cobalt Spinel Electrocatalysts Supported on Activated Carbon for Hydrogen Evolution Reaction

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1302 ◽  
Author(s):  
Jhony Xavier Flores-Lasluisa ◽  
Javier Quílez-Bermejo ◽  
Ana Cristina Ramírez-Pérez ◽  
Francisco Huerta ◽  
Diego Cazorla-Amorós ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Cobalt Oxide ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Physical Adsorption ◽  
Electrochemical Techniques ◽  
Alkaline Media ◽  
Electrochemical Tests ◽  
Cobalt Spinel ◽  
Silica Template

The development of electrocatalysts based on the doping of copper over cobalt spinel supported on a microporous activated carbon has been studied. Both copper–cobalt and cobalt spinel nanoparticles were synthesized using a silica-template method. Hybrid materials consisting of an activated carbon (AC), cobalt oxide (Co3O4), and copper-doped cobalt oxide (CuCo2O4) nanoparticles, were obtained by dry mixing technique and evaluated as electrocatalysts in alkaline media for hydrogen evolution reaction. Physical mixtures containing 5, 10, and 20 wt.% of Co3O4 or CuCo2O4 with a highly microporous activated carbon were prepared and characterized by XRD, TEM, XPS, physical adsorption of gases, and electrochemical techniques. The electrochemical tests revealed that the electrodes containing copper as the dopant cation result in a lower overpotential and higher current density for the hydrogen evolution reaction.

MoS2 versatile spray-coating of 3D electrodes for the hydrogen evolution reaction

Nanoscale ◽  
2019 ◽  
Vol 11 (20) ◽  
pp. 9888-9895 ◽  
Author(s):  
Rui Gusmão ◽  
Zdeněk Sofer ◽  
Petr Marvan ◽  
Martin Pumera
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Spray Coating ◽  
Coating Method ◽  
3D Electrodes ◽  
3D Printed ◽  
Improved Performance ◽  
Carbon Based

A straightforward MoS2 spray-coating method was applied to rigid, flexible, porous and 3D-printed carbon-based surfaces, yielding improved performance for the hydrogen evolution reaction.

Mechanistic Insight into Enhanced Hydrogen Evolution Reaction Activity of Ultrathin Hexagonal Boron Nitride-Modified Pt Electrodes

ACS Catalysis ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 6636-6644 ◽  
Author(s):  
Anku Guha ◽  
Thazhe Veettil Vineesh ◽  
Archana Sekar ◽  
Sreekanth Narayanaru ◽  
Mihir Sahoo ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Hexagonal Boron Nitride ◽  
Mechanistic Insight ◽  
Pt Electrodes ◽  
Insight Into

Agaric-derived N-doped carbon nanorod arrays@nanosheet networks coupled with molybdenum carbide nanoparticles as highly efficient pH-universal hydrogen evolution electrocatalysts

Nanoscale ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 5159-5169 ◽  
Author(s):  
Qiaoling Kang ◽  
Mengyuan Li ◽  
Zengrui Wang ◽  
Qingyi Lu ◽  
Feng Gao
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Molybdenum Carbide ◽  
Nanorod Arrays ◽  
Highly Efficient ◽  
Carbon Based

Non-precious agaric-derived carbon-based superstructures coupling with Mo2C nanoparticles were developed as efficient and stable pH universal hydrogen evolution reaction (HER) catalysts.

An extremely active and durable Mo 2 C/graphene-like carbon based electrocatalyst for hydrogen evolution reaction

2017 ◽  
Vol 6 ◽  
pp. 230-237 ◽  
Author(s):  
Yanping Zhu ◽  
Gao Chen ◽  
Yijun Zhong ◽  
Wei Zhou ◽  
Meilin Liu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Carbon Based
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