Phase Engineering of Dual Active 2D Bi2O3-based Nanocatalysts for Alkaline Hydrogen Evolution Reaction Electrocatalysis

2021 ◽  
Author(s):  
Ziyang Wu ◽  
Jun Mei ◽  
Qiong Liu ◽  
Sen Wang ◽  
Wei Li ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Water Dissociation ◽  
Alkaline Conditions ◽  
Electrochemical Water Splitting ◽  
Phase Engineering ◽  
Dissociation Step

Hydrogen evolution from electrochemical water splitting under alkaline conditions is an ongoing challenge for the requirement of a simultaneous balance to be achieved between the water dissociation step and the...

Tungsten-doped Ni–Co phosphides with multiple catalytic sites as efficient electrocatalysts for overall water splitting

2019 ◽  
Vol 7 (28) ◽  
pp. 16859-16866 ◽  
Author(s):  
Shan-Shan Lu ◽  
Li-Ming Zhang ◽  
Yi-Wen Dong ◽  
Jia-Qi Zhang ◽  
Xin-Tong Yan ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Alkaline Media ◽  
Water Dissociation ◽  
Overall Water Splitting ◽  
Catalytic Sites ◽  
Additional Water ◽  
Dissociation Step

The design of electrocatalysts including precious and nonprecious metals for the hydrogen evolution reaction (HER) in alkaline media remains challenging due to the sluggish reaction kinetics caused by the additional water dissociation step.

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>

Confinement of Pt NPs by Hollow-Porous-Carbon-Sphere via Pore Regulation with Promoted Activity and Durability in Hydrogen Evolution Reaction

Nanoscale ◽  
2021 ◽  
Author(s):  
Zhuofan Gan ◽  
Chengyong Shu ◽  
Chengwei Deng ◽  
Wei Du ◽  
Bo HUANG ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Noble Metal ◽  
Hydrogen Evolution Reaction ◽  
Porous Carbon ◽  
Specific Activity ◽  
Carbon Sphere ◽  
Hydrogen Energy ◽  
Noble Metal Catalysts ◽  
Electrochemical Water Splitting

Electrochemical water splitting is promising method to generate pollution-free and sustainable hydrogen energy. However, the specific activity and durability of noble metal catalysts is the main hindrance to hydrogen evolution...

scholarly journals Cobalt-Based Metal-Organic Frameworks and Their Derivatives for Hydrogen Evolution Reaction

2020 ◽  
Vol 8 ◽  
Author(s):  
Wenjuan Han ◽  
Minhan Li ◽  
Yuanyuan Ma ◽  
Jianping Yang
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Alternative Energy ◽  
Metal Organic Frameworks ◽  
Electrochemical Performances ◽  
Promising Alternative ◽  
Metal Organic ◽  
Electrochemical Water Splitting

Hydrogen has been considered as a promising alternative energy to replace fossil fuels. Electrochemical water splitting, as a green and renewable method for hydrogen production, has been drawing more and more attention. In order to improve hydrogen production efficiency and lower energy consumption, efficient catalysts are required to drive the hydrogen evolution reaction (HER). Cobalt (Co)-based metal-organic frameworks (MOFs) are porous materials with tunable structure, adjustable pores and large specific surface areas, which has attracted great attention in the field of electrocatalysis. In this review, we focus on the recent progress of Co-based metal-organic frameworks and their derivatives, including their compositions, morphologies, architectures and electrochemical performances. The challenges and development prospects related to Co-based metal-organic frameworks as HER electrocatalysts are also discussed, which might provide some insight in electrochemical water splitting for future development.

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>

Sulfur doped ruthenium nanoparticles as a highly efficient electrocatalyst for hydrogen evolution reaction in alkaline media

2021 ◽  
Author(s):  
Cong Lin ◽  
Hongbao Li ◽  
Cheng-Zong Yuan ◽  
Zhengkun Yang ◽  
Hanbao Chong ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Crucial Role ◽  
Alkaline Media ◽  
Energy Crisis ◽  
Ruthenium Nanoparticles ◽  
Highly Efficient ◽  
Electrochemical Water Splitting

Efficient catalysts for hydrogen evolution reaction (HER) play a crucial role in electrochemical water splitting, which is one of the most promising approaches to alleviate the problem of energy crisis...

Metallic 1T-VS2 nanosheets featuring V2+ self-doping and mesopores towards an efficient hydrogen evolution reaction

2019 ◽  
Vol 6 (12) ◽  
pp. 3510-3517 ◽  
Author(s):  
Jun Xu ◽  
Yuan Zhu ◽  
Bansui Yu ◽  
Changji Fang ◽  
Junjun Zhang
Keyword(s):  
Catalytic Activity ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
High Conductivity ◽  
Electrochemical Water Splitting

Metallic 1T-VS2 nanosheets featuring V2+-doping and plenty of mesopores have abundant defects and high conductivity and exhibit superior catalytic activity for electrochemical water splitting.

N-doped WS2 nanosheets: a high-performance electrocatalyst for the hydrogen evolution reaction

2016 ◽  
Vol 4 (29) ◽  
pp. 11234-11238 ◽  
Author(s):  
Changqi Sun ◽  
Jingyan Zhang ◽  
Ji Ma ◽  
Peitao Liu ◽  
Daqiang Gao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Energy Efficient ◽  
High Performance ◽  
Electrochemical Water Splitting ◽  
Ws2 Nanosheets

Non-Pt-based catalysts are urgently required to produce abundant hydrogen in electrochemical water splitting, in order to make the hydrogen evolution reaction (HER) feasible and energy efficient.

Surface engineering CoP/Co3O4 heterojunction for high performance bi-functional water splitting electro-catalysis

Nanoscale ◽  
2021 ◽  
Author(s):  
Xintong LI ◽  
Yizhe Liu ◽  
Qidi Sun ◽  
Wei-Hsiang Huang ◽  
Zilong Wang ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
High Performance ◽  
Surface Engineering ◽  
Electro Catalysis ◽  
Electrochemical Water Splitting ◽  
Splitting Process

In electrochemical water splitting process, integrating hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in the same electrolyte with same catalyst is highly beneficial for increasing the energy efficiency...

Nanostructured catalysts for electrochemical water splitting: current state and prospects

2016 ◽  
Vol 4 (31) ◽  
pp. 11973-12000 ◽  
Author(s):  
Xiumin Li ◽  
Xiaogang Hao ◽  
Abuliti Abudula ◽  
Guoqing Guan
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Nanostructured Catalysts ◽  
Water Electrolysis ◽  
Liquid Electrolyte ◽  
Current State ◽  
Electrochemical Water Splitting

The fundamentals of water electrolysis, current popular electrocatalysts developed for cathodic hydrogen evolution reaction (HER) and anodic oxygen evolution reaction (OER) in liquid electrolyte water electrolysis are reviewed and discussed.

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