A Mn-doped Ni2P nanosheet array: an efficient and durable hydrogen evolution reaction electrocatalyst in alkaline media

2017 ◽  
Vol 53 (80) ◽  
pp. 11048-11051 ◽  
Author(s):  
Ya Zhang ◽  
Yiwei Liu ◽  
Min Ma ◽  
Xiang Ren ◽  
Zhiang Liu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Efficiency ◽  
Nickel Foam ◽  
Alkaline Media ◽  
Nanosheet Array ◽  
Mn Doped

A Mn-doped Ni2P nanosheet array on nickel foam (Mn-Ni2P/NF) acts as a high-efficiency and durable electrocatalyst for the hydrogen evolution reaction in 1.0 M KOH, driving 20 mA cm−2 at an overpotential of 103 mV, which is 82 mV less than that for Ni2P/NF.

In situ electro-oxidation modulation of Ru(OH)x/Ag supported on nickel foam for efficient hydrogen evolution reaction in alkaline media

2019 ◽  
Vol 44 (39) ◽  
pp. 21683-21691 ◽  
Author(s):  
Xin-Yu Zhang ◽  
Bao-Yu Guo ◽  
Feng-Ting Li ◽  
Bin Dong ◽  
Jia-Qi Zhang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Nickel Foam ◽  
Alkaline Media ◽  
Electro Oxidation

Vertically aligned NiS2/CoS2/MoS2 nanosheet array as an efficient and low-cost electrocatalyst for hydrogen evolution reaction in alkaline media

2020 ◽  
Vol 65 (5) ◽  
pp. 359-366 ◽  
Author(s):  
Yang Zhang ◽  
Mengtong Shi ◽  
Changzheng Wang ◽  
Yaxing Zhu ◽  
Nianwu Li ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Low Cost ◽  
Alkaline Media ◽  
Nanosheet Array ◽  
Vertically Aligned ◽  
Mos2 Nanosheet

scholarly journals Enhancement of hydrogen evolution reaction kinetics in alkaline media by fast galvanic displacement of nickel with rhodium – from smooth surfaces to electrodeposited nickel foams

2021 ◽  
Author(s):  
Aleksandar Jovanović ◽  
Lazar Bijelić ◽  
Ana Dobrota ◽  
Natalia Skorodumova ◽  
Slavko Mentus ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Nickel Foam ◽  
Water Electrolysis ◽  
Alkaline Media ◽  
Nickel Surface ◽  
Hydrogen Binding ◽  
Galvanic Displacement ◽  
Alkaline Water Electrolysis ◽  
Spontaneous Deposition

Energy-efficient hydrogen production is one of the key factors for advancing the hydrogen-based economy. Alkaline water electrolysis is the main route for the production of high-purity hydrogen, but further improvements of hydrogen evolution reaction (HER) catalysts are still needed. Industrial alkaline electrolysis relies on Ni-based catalysts, and here we describe a drastic improvement of HER activity of Ni in alkaline media using several model catalysts for HER obtained upon nickel surface modification in aqueous solution of rhodium salts, when a spontaneous deposition of rhodium takes place based on the chemical displacement reaction 3Ni + 2Rh3+ = 3Ni2+ + 2Rh. In the case of smooth Ni-poly electrodes, HER activity surpasses the activity of Pt-poly already after 30 s of exchange with Rh. SEM analysis showed that Rh is uniformly distributed, while surface roughness changes within 10%, agreeing with electrochemical measurements. Furthermore, XPS analysis has shown effective incorporation of Rh in the surface, while DFT calculations suggest that hydrogen binding is significantly weakened on the Rh-modified Ni surfaces. Such tuning of the hydrogen binding energy is seen as the main factor governing HER activity improvements. The same galvanic displacement protocols were employed for nickel foam electrodes and electrodeposited Ni on Ti mesh. In both cases, somewhat longer Rh exchange times are needed to obtain superior activities than for the smooth Ni surface, but up to 10 min. HER overpotential corresponding to −10 mA cm−2 for nickel foam and electrodeposited Ni electrodes, after modification with Rh, amounted to only −0.07 and −0.09 V, respectively. Thus, it is suggested that a fast spontaneous displacement of Ni with Rh could effectively boost HER in alkaline media with minor cost penalties compared to energy saving in the electrolysis process.

scholarly journals Novel heterostructure Cu2S/Ni3S2 coral-like nanoarrays on Ni foam to enhance hydrogen evolution reaction in alkaline media

RSC Advances ◽  
2021 ◽  
Vol 11 (62) ◽  
pp. 39493-39502
Author(s):  
Yizhi Peng ◽  
Hanwei He
Keyword(s):  
Charge Transfer ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Noble Metal ◽  
Hydrogen Evolution Reaction ◽  
Active Sites ◽  
Alkaline Media ◽  
Ni Foam ◽  
Nanosheet Array ◽  
Alkaline Conditions

We fabricated a heterostructure Cu2S/Ni3S2 nanosheet array, which can accelerate charge transfer and provide more active sites. This work provides a promising non-noble metal electrocatalyst for water splitting under alkaline conditions.

scholarly journals Facile synthesis of Ni3S2/rGO nanosheets composite on nickel foam as efficient electrocatalyst for hydrogen evolution reaction in alkaline media

2017 ◽  
Vol 33 (5) ◽  
pp. 519-527 ◽  
Author(s):  
Binhong He ◽  
Minjie Zhou ◽  
Zhaohui Hou ◽  
Gangyong Li ◽  
Yafei Kuang
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Nickel Foam ◽  
Alkaline Media ◽  
Facile Synthesis ◽  
Image Position

Abstract

scholarly journals Facile Synthesis of Well-Dispersed Ni2P on N-Doped Nanomesh Carbon Matrix as a High-Efficiency Electrocatalyst for Alkaline Hydrogen Evolution Reaction

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 1022 ◽  
Author(s):  
Fan Yang ◽  
Shuo Huang ◽  
Bing Zhang ◽  
Liqiang Hou ◽  
Yi Ding ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
High Efficiency ◽  
Carbon Matrix ◽  
Catalytic Performance ◽  
Alkaline Media ◽  
Mesh Structure ◽  
Factors Affecting ◽  
The Stability

The development of non-noble metal hydrogen evolution catalysts that can replace Pt is crucial for efficient hydrogen production. Herein, we develop a type of well-dispersed Ni2P on N-doped nanomesh carbon (NC) electrocatalyst by a facile pyrolysis method, which shows excellent hydrogen evolution reaction (HER) catalytic performance. It is rather remarkable that the overpotential of Ni2P/NC prepared under optimal proportion is 108 mV at 10 mA·cm−2 current density in 1 M KOH solution with the tafel slope of 67.3 mV·dec−1, the catalytic activity has no significant attenuation after 1000 cycles of cyclic voltammetry (CV)method. The hydrogen evolution performance of the electrocatalytic is better than most similar catalysts in alkaline media. The unique mesh structure of the carbon component in the catalyst facilitates the exposure of the active site and reduces the impedance, which improves the efficiency of electron transport as well as ensuring the stability of the hydrogen evolution reaction. In addition, we prove that nitrogen doping and pore structure are also important factors affecting catalytic activity by control experiments. Our results show that N-doped nanomesh carbon, as an efficient support, combined with Ni2P nanoparticles is of great significance for the development of efficient hydrogen evolution electrodes.

Surface Strain Engineered Ni-NiO for Boosting Hydrogen Evolution Reaction in Alkaline Media

2021 ◽  
pp. 138985
Author(s):  
Xuerui Yi ◽  
Xiaobo He ◽  
Fengxiang Yin ◽  
Guoru Li ◽  
Zhichun Li
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Surface Strain ◽  
Alkaline Media
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