New Insight into the Hydrogen Evolution Reaction under Buffered Near-Neutral pH Conditions: Enthalpy and Entropy of Activation

2016 ◽  
Vol 120 (42) ◽  
pp. 24187-24196 ◽  
Author(s):  
Tatsuya Shinagawa ◽  
Kazuhiro Takanabe
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Neutral Ph ◽  
Entropy Of Activation ◽  
Ph Conditions ◽  
Enthalpy And Entropy ◽  
Insight Into

Electrocatalytic hydrogen evolution under neutral pH conditions: current understandings, recent advances, and future prospects

2020 ◽  
Vol 13 (10) ◽  
pp. 3185-3206 ◽  
Author(s):  
Zheng Zhou ◽  
Zengxia Pei ◽  
Li Wei ◽  
Shenlong Zhao ◽  
Xian Jian ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Future Prospects ◽  
Neutral Ph ◽  
Recent Advances ◽  
Ph Conditions ◽  
Neutral Conditions

This review summarizes the latest advances in hydrogen evolution reaction under neutral conditions to enlighten future researches.

scholarly journals A Supramolecular Porous Organic Cage Platform Promotes Electrochemical Hydrogen Evolution from Water Catalyzed by Cobalt Porphyrins

2021 ◽  
Author(s):  
Peter T. Smith ◽  
Bahiru Punja Benke ◽  
Lun An ◽  
Younghoon Kim ◽  
Kimoon Kim ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Supramolecular Structure ◽  
Fold Increase ◽  
Faradaic Efficiency ◽  
Tafel Slope ◽  
Neutral Ph ◽  
Catalyst Film ◽  
Electrochemically Active ◽  
Cobalt Porphyrins

We report a supramolecular porous organic cage platform composed of cobalt porphyrins for catalyzing the electrochemical hydrogen evolution reaction (HER) from water at neutral pH. Owing to its permanent porosity, the supramolecular structure yields a catalyst film with a 5-fold increase in the number of electrochemically active cobalt atoms and an improvement in Tafel slope from 170 mV/decade to 119 mV/decade compared to a planar cobalt porphyrin analog, reaching activities over 19,000 turnovers for HER over a 24-hour period with 100% Faradaic efficiency.

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.

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
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