Polypyrrole Hollow Microspheres with Boosted Hydrophilic Properties for Enhanced Hydrogen Evolution Water Dissociation Kinetics

2020 ◽  
Vol 12 (51) ◽  
pp. 57093-57101
Author(s):  
Haihong Zheng ◽  
Fang Yang ◽  
Tuzhi Xiong ◽  
David Adekoya ◽  
Yongchao Huang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hollow Microspheres ◽  
Water Dissociation ◽  
Dissociation Kinetics

Efficient alkaline hydrogen evolution on atomically dispersed Ni–Nx Species anchored porous carbon with embedded Ni nanoparticles by accelerating water dissociation kinetics

2019 ◽  
Vol 12 (1) ◽  
pp. 149-156 ◽  
Author(s):  
Chaojun Lei ◽  
Yu Wang ◽  
Yang Hou ◽  
Pan Liu ◽  
Jian Yang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Porous Carbon ◽  
Carbon Matrix ◽  
Water Dissociation ◽  
Ni Nanoparticles ◽  
Dissociation Kinetics ◽  
Highly Efficient ◽  
Alkaline Conditions

Atomically dispersed Ni–Nx species anchored porous carbon matrix with embedded Ni nanoparticles was synthesized for highly efficient hydrogen evolution in alkaline conditions.

In situ formed oxy/hydroxide antennas accelerating the water dissociation kinetics on a Co@N-doped carbon core–shell assembly for hydrogen production in alkaline solution

2019 ◽  
Vol 48 (31) ◽  
pp. 11927-11933 ◽  
Author(s):  
Tao Yang ◽  
Lang Pei ◽  
Shicheng Yan ◽  
Zhentao Yu ◽  
Tao Yu ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Solution ◽  
Water Dissociation ◽  
Core Shell ◽  
Dissociation Kinetics ◽  
Alkaline Electrolytes ◽  
Carbon Core

The hydrogen evolution reaction (HER) in alkaline electrolytes is restricted severely by sluggish water dissociation in the Volmer step.

Accelerated Water Dissociation Kinetics By Electron‐Enriched Cobalt Sites for Efficient Alkaline Hydrogen Evolution

2021 ◽  
pp. 2109556
Author(s):  
Qizhou Dai ◽  
Lin Wang ◽  
Kexin Wang ◽  
Xiahan Sang ◽  
Zhongjian Li ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Dissociation ◽  
Dissociation Kinetics

Electrocatalytically Inactive Copper Improves the Water Adsorption/Dissociation on Ni3S2 for Accelerated Alkaline and Neutral Hydrogen Evolution

Nanoscale ◽  
2021 ◽  
Author(s):  
Lei Zhang ◽  
Xiaorui Gao ◽  
Ying Zhu ◽  
Acan Liu ◽  
Huilong Dong ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Noble Metal ◽  
Water Adsorption ◽  
Neutral Hydrogen ◽  
Water Dissociation ◽  
Dissociation Kinetics

Nickel dichalcogenides, especially Ni3S2, has presented inferior alkaline and neutral hydrogen evolution activity due to sluggish water dissociation kinetics although it promises as a type of non-noble metal-based electrocatalyst for...

Accelerating water dissociation kinetics of Ni3N by tuning interfacial orbital coupling

Nano Research ◽  
2021 ◽  
Author(s):  
Yishang Wu ◽  
Yufang Xie ◽  
Shuwen Niu ◽  
Yipeng Zang ◽  
Jinyan Cai ◽  
...  
Keyword(s):  
Water Dissociation ◽  
Dissociation Kinetics ◽  
Kinetics Of

scholarly journals Synergistic Interfacial and Doping Engineering of Heterostructured NiCo(OH)x-CoyW as an Efficient Alkaline Hydrogen Evolution Electrocatalyst

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Ruopeng Li ◽  
Hao Xu ◽  
Peixia Yang ◽  
Dan Wang ◽  
Yun Li ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Efficiency ◽  
Low Voltage ◽  
Electrochemical Etching ◽  
Synergistic Effects ◽  
Release Kinetics ◽  
Water Electrolysis ◽  
Water Dissociation ◽  
Practical Applications ◽  
Environmentally Friendly Process

AbstractTo achieve high efficiency of water electrolysis to produce hydrogen (H2), developing non-noble metal-based catalysts with considerable performance have been considered as a crucial strategy, which is correlated with both the interphase properties and multi-metal synergistic effects. Herein, as a proof of concept, a delicate NiCo(OH)x-CoyW catalyst with a bush-like heterostructure was realized via gas-template-assisted electrodeposition, followed by an electrochemical etching-growth process, which ensured a high active area and fast gas release kinetics for a superior hydrogen evolution reaction, with an overpotential of 21 and 139 mV at 10 and 500 mA cm−2, respectively. Physical and electrochemical analyses demonstrated that the synergistic effect of the NiCo(OH)x/CoyW heterogeneous interface resulted in favorable electron redistribution and faster electron transfer efficiency. The amorphous NiCo(OH)x strengthened the water dissociation step, and metal phase of CoW provided sufficient sites for moderate H immediate adsorption/H2 desorption. In addition, NiCo(OH)x-CoyW exhibited desirable urea oxidation reaction activity for matching H2 generation with a low voltage of 1.51 V at 50 mA cm−2. More importantly, the synthesis and testing of the NiCo(OH)x-CoyW catalyst in this study were all solar-powered, suggesting a promising environmentally friendly process for practical applications.

Promoted Alkaline Hydrogen Evolution by N-doped Pt-Ru Single Atoms Alloy

2021 ◽  
Author(s):  
Mi Luo ◽  
Jinyan Cai ◽  
Jiasui Zou ◽  
Zheng Jiang ◽  
Gongming Wang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Surface Adsorption ◽  
Adsorption Behavior ◽  
Water Dissociation ◽  
Desorption Kinetics ◽  
Catalytic Surface ◽  
Single Atoms

Since water dissociation and H desorption kinetics essentially determine the performance of alkaline hydrogen evolution reaction (HER), rationally regulating surface adsorption behavior to achieve superior catalytic surface is always challenging...

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