Construction of efficient bismuth/boron-based flexible electrode in organic media toward neutral hydrogen evolution

2022 ◽  
Author(s):  
Jinli Fan ◽  
Weiju Hao ◽  
Chengyu Fu ◽  
Ziliang Chen ◽  
Rikai Liang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Adsorption ◽  
Low Cost ◽  
Neutral Hydrogen ◽  
Organic Media ◽  
Flexible Electrode ◽  
Desorption Process ◽  
High Efficient ◽  
Neutral Electrolyte ◽  
Adsorption Desorption

Preparing high-efficient, low-cost and stable catalysts to produce hydrogen in neutral electrolyte is a major challenge due to the sluggish kinetics, low conductivity and complex hydrogen adsorption-desorption process. Here, series...

NiFePd/UiO-66 nanocomposites as highly efficient catalysts to accelerate hydrogen evolution from hydrous hydrazine

2019 ◽  
Vol 6 (10) ◽  
pp. 2727-2735 ◽  
Author(s):  
Xue Song ◽  
Pan Yang ◽  
Jingchuan Wang ◽  
Xiaochong Zhao ◽  
Yuanlin Zhou ◽  
...  
Keyword(s):  
Hydrazine Hydrate ◽  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
Low Cost ◽  
Efficient Catalyst ◽  
Highly Efficient ◽  
High Efficient ◽  
Nano Catalysts

NiFe nano-catalysts modified by the dopant of Pd were reducted on UiO-66 by NaBH4, which have been used as a low cost and high efficient catalyst with outstanding activity and durability for hydrogen generation from the decomposition of hydrazine hydrate.

scholarly journals Fabrication of Robust Hydrogen Evolution Reaction Electrocatalyst Using Ag2Se by Vacuum Evaporation

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1460
Author(s):  
Sajjad Hussain ◽  
Jinwoong Chae ◽  
Kamran Akbar ◽  
Dhanasekaran Vikraman ◽  
Linh Truong ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
First Principles ◽  
Hydrogen Adsorption ◽  
Hydrogen Generation ◽  
Low Cost ◽  
First Principles Calculations ◽  
Electrochemical Surface Area ◽  
Complex Catalyst ◽  
Catalyst Synthesis

Much research has been done on reliable and low-cost electrocatalysts for hydrogen generation by water splitting. In this study, we synthesized thin films of silver selenide (Ag2Se) using a simple thermal evaporation route and demonstrated their electrocatalytic hydrogen evolution reaction (HER) activity. The Ag2Se catalysts show improved electrochemical surface area and good HER electrocatalytic behavior (367 mV overpotential @ 10 mA·cm−2, exchange current density: ~1.02 × 10−3 mA·cm−2, and Tafel slope: 53 mV·dec−1) in an acidic medium). The reliability was checked in 0.5 M sulfuric acid over 20 h. Our first-principles calculations show the optimal energy of hydrogen adsorption, which is consistent with experimental results. The works could be further extended for finding a new catalyst by associating the selenide, sulfide or telluride-based materials without complex catalyst synthesis procedures.

scholarly journals Surface Modifications of 2D-Ti3C2O2 by Nonmetal Doping for Obtaining High Hydrogen Evolution Reaction Activity: A Computational Approach

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 161
Author(s):  
Fangtao Li ◽  
Xiaoxu Wang ◽  
Rongming Wang
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
High Performance ◽  
Hydrogen Adsorption ◽  
Low Cost ◽  
Level Shift ◽  
High Hydrogen ◽  
Catalytic Active Sites

As a typical two-dimensional (2D) MXene, Ti3C2O2 has been considered as a potential material for high-performance hydrogen evolution reaction (HER) catalyst, due to its anticorrosion and hydrophilic surface. However, it is still a challenge to improve the Ti3C2O2 surficial HER catalytic activity. In this work, we investigated the HER activity of Ti3C2O2 after the surface was doped with S, Se, and Te by the first principles method. The results indicated that the HER activity of Ti3C2O2 is improved after being doped with S, Se, Te because the Gibbs free energy of hydrogen adsorption (ΔGH) is increased from −2.19 eV to 0.08 eV. Furthermore, we also found that the ΔGH of Ti3C2O2 increased from 0.182 eV to 0.08 eV with the doping concentration varied from 5.5% to 16.7%. The HER catalytic activity improvement of Ti3C2O2 is attributed to the local crystal structure distortion in catalytic active sites and Fermi level shift leads to the p-d orbital hybridization. Our results pave a new avenue for preparing a low-cost and high performance HER catalyst.

Rational Design of Ni3S2 Nanosheets-Ag Nanorods on Ni Foam with Improved Hydrogen Adsorption Sites for Hydrogen Evolution Reaction

2021 ◽  
Author(s):  
Haijun Liu ◽  
Wen-Li Yu ◽  
Meng-Xuan Li ◽  
Shu-Yue Dou ◽  
Fu-Li Wang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hydrogen Bonds ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Rational Design ◽  
Hydrogen Adsorption ◽  
Low Cost ◽  
Metal Sulfides ◽  
Ni Foam ◽  
Adsorption Sites

Transition-metal sulfides (MxSy) have attracted keen interest as promising catalysts for hydrogen evolution reaction (HER) due to their low cost. However, the formation of sulfur-hydrogen bonds on MxSy (S-Hads) will...

scholarly journals Balancing hydrogen adsorption/desorption by orbital modulation for efficient hydrogen evolution catalysis

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Feng Li ◽  
Gao-Feng Han ◽  
Hyuk-Jun Noh ◽  
Jong-Pil Jeon ◽  
Ishfaq Ahmad ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Adsorption ◽  
Orbital Modulation ◽  
Adsorption Desorption

The mechanism of hydrogen adsorption on transition metal dichalcogenides as hydrogen evolution reaction catalyst

2017 ◽  
Vol 19 (15) ◽  
pp. 10125-10132 ◽  
Author(s):  
Jinsong Wang ◽  
Jia Liu ◽  
Bao Zhang ◽  
Xiao Ji ◽  
Kui Xu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Hydrogen Adsorption ◽  
Low Cost ◽  
Transition Metal Dichalcogenides ◽  
Electrochemical Stability ◽  
Two Dimensional ◽  
Metal Dichalcogenides

Two-dimensional transition metal dichalcogenides (TMDs) have been widely considered as potential hydrogen evolution reaction (HER) catalysts because of their low cost and good electrochemical stability in acid conditions.

2,2’-Dipyridylamine as Organic Molecular Electrocatalyst for Hydrogen Evolution Reaction in Acidic Electrolytes

2019 ◽  
Author(s):  
Xi Yin ◽  
Ling Lin ◽  
Hoon T. Chung ◽  
Ulises Martinez ◽  
Andrew M. Baker ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Density Functional ◽  
Low Cost ◽  
Membrane Electrode Assembly ◽  
Carbon Surface ◽  
Membrane Electrode ◽  
Durability Test ◽  
Onset Potential ◽  
Precious Metal Catalysts

Finding a low-cost and stable electrocatalyst for hydrogen evolution reaction (HER) as a replacement for scarce and expensive precious metal catalysts has attracted significant interest from chemical and materials research communities. Here, we demonstrate an organic catalyst based on 2,2’-dipyridylamine (dpa) molecules adsorbed on carbon surface, which shows remarkable hydrogen evolution activity and performance durability in strongly acidic polymer electrolytes without involving any metal. The HER onset potential at dpa adsorbed on carbon has been found to be less than 50 mV in sulfuric acid and in a Nafion-based membrane electrode assembly (MEA). At the same time, this catalyst has shown no performance loss in a 60-hour durability test. The HER reaction mechanisms and the low onset overpotential in this system are revealed based on electrochemical study. Density functional theory (DFT) calculations suggest that the pyridyl-N functions as the active site for H adsorption with a free energy of -0.13 eV, in agreement with the unusually low onset overpotential for an organic molecular catalyst.<br>

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