NiMo Nanoparticles Anchored on N-Doped Carbon Rods for High-Efficiency Hydrogen Electrooxidation in Alkaline Media

2021 ◽  
Vol 13 (13) ◽  
pp. 15475-15481
Author(s):  
Bingyan Xiong ◽  
Binbin Jin ◽  
Wenbin Zhao ◽  
Hangyan Zhou ◽  
Juanjuan Luo ◽  
...  
Keyword(s):  
High Efficiency ◽  
Alkaline Media ◽  
Carbon Rods ◽  
Hydrogen Electrooxidation

scholarly journals Observing sodiation process and achieving high efficiency of yolk-shell antimony@carbon rods

2021 ◽  
Author(s):  
Xuming Yang ◽  
Yuanmin Zhu ◽  
Duojie Wu ◽  
Kun Liu ◽  
Haiyan Zhao ◽  
...  
Keyword(s):  
High Efficiency ◽  
Carbon Rods

scholarly journals Ru catalyst supported on nitrogen-doped nanotubes as high efficiency electrocatalysts for hydrogen evolution in alkaline media

RSC Advances ◽  
2020 ◽  
Vol 10 (38) ◽  
pp. 22297-22303
Author(s):  
Qinglei Liu ◽  
Lehao Yang ◽  
Peng Sun ◽  
Haigang Liu ◽  
Jiahua Zhao ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Hydrogen Evolution ◽  
Potential Application ◽  
High Efficiency ◽  
Alkaline Media ◽  
Ru Catalyst ◽  
Nitrogen Doped ◽  
Conversion System ◽  
Energy Conversion System ◽  
Increasing Demand

Due to the potential application in the future energy conversion system, there is an increasing demand for efficient, stable and cheap platinum-free catalysts for hydrogen evolution.

Design the PdCu/Ni2P electrocatalyst with high efficiency for ethanol oxidation reaction in alkaline media

2021 ◽  
Author(s):  
Yanxin Bai ◽  
Xiang Gong ◽  
Na Ye ◽  
Xiaoying Qi ◽  
Zhao Jiang ◽  
...  
Keyword(s):  
Oxidation Reaction ◽  
Ethanol Oxidation ◽  
High Efficiency ◽  
Alkaline Media ◽  
Ethanol Oxidation Reaction

Cobalt and nitrogen co-doped Ni3S2 nanoflowers on nickel foam as high-efficiency electrocatalysts for overall water splitting in alkaline media

2021 ◽  
Author(s):  
Xiaoqiang Du ◽  
Guangyu Ma ◽  
Xiaoshuang Zhang
Keyword(s):  
Water Splitting ◽  
High Performance ◽  
High Efficiency ◽  
Nickel Foam ◽  
Water Electrolysis ◽  
Cost Effective ◽  
Alkaline Media ◽  
Co Doping ◽  
Production Industry

The development of high-performance and cost-effective bifunctional water splitting catalysts are of enormous significance to the hydrogen production industry from water electrolysis. Herein, an in-situ Co and N co-doping method...

scholarly journals Boron Nanosheet-Supported Rh Catalysts for Hydrogen Evolution: A New Territory for the Strong Metal-Support Interaction Effect

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Keng Chen ◽  
Zeming Wang ◽  
Liang Wang ◽  
Xiuzhen Wu ◽  
Bingjie Hu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Interaction Effect ◽  
High Efficiency ◽  
Theoretical Calculations ◽  
Average Diameter ◽  
Environmental Crisis ◽  
Alkaline Media ◽  
Crystal Plane ◽  
Supported Metal Catalysts ◽  
Metal Support Interaction

AbstractHigh-efficiency electrochemical hydrogen evolution reaction (HER) offers a promising strategy to address energy and environmental crisis. Platinum is the most effective electrocatalyst for the HER. However, challenging scarcity, valuableness, and poor electrochemical stability still hinder its wide application. Here, we designed an outstanding HER electrocatalyst, highly dispersed rhodium (Rh) nanoparticles with an average diameter of only 3 nm supported on boron (B) nanosheets. The HER catalytic activity is even comparable to that of commercial platinum catalysts, with an overpotential of only 66 mV in 0.5 M H2SO4 and 101 mV in 1 M KOH to reach the current density of 10 mA cm−2. Meanwhile, the catalyst exhibited impressive electrochemical durability during long-term electrochemical processes in acidic and alkaline media, even the simulated seawater environment. Theoretical calculations unraveled that the structure–activity relationship between B(104) crystal plane and Rh(111) crystal plane is beneficial to the release of hydrogen, and surface O plays a vital role in the catalysis process. Our work may gain insights into the development of supported metal catalysts with robust catalytic performance through precise engineering of the strong metal-supported interaction effect.

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.

scholarly journals High Performance Core-Shell Ni/Ni(OH)2 Electrospun Nanofiber Anodes for Decoupled Water Splitting

2020 ◽  
Author(s):  
Avigail Landman ◽  
Shabtai Hadash ◽  
Gennady E. Shter ◽  
Hen Dotan ◽  
Avner Rothschild ◽  
...  
Keyword(s):  
Water Splitting ◽  
Shell Structure ◽  
High Performance ◽  
High Efficiency ◽  
Porous Electrodes ◽  
Alkaline Media ◽  
Core Shell ◽  
Electrospun Nanofiber ◽  
Charge Capacity ◽  
Core Shell Structure

<ul> <li>Large surface area porous electrodes prepared from electrospun Ni and Ni-Co fibers</li> <li>A Ni/Ni(OH)<sub>2</sub> core/shell structure produced by galvanic cycling in alkaline media</li> <li>Electrodes with improved current density and charge capacity </li> <li>High efficiency decoupled water splitting with Ni/Ni(OH)<sub>2</sub> redox mediator</li> </ul>

scholarly journals Three-Dimensional Flower-like Fe, C-doped-MoS2/Ni3S2 Heterostructures Spheres for Accelerating Electrocatalytic Oxygen and Hydrogen Evolution

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 340
Author(s):  
Xuefeng Lv ◽  
Guangsheng Liu ◽  
Song Liu ◽  
Wenting Chen ◽  
Dehua Cao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Electrical Transport ◽  
Rational Design ◽  
High Efficiency ◽  
Three Dimensional ◽  
Metal Sulfide ◽  
Molybdenum Sulfide ◽  
Alkaline Media ◽  
Energy Storage And Conversion ◽  
Alkaline Electrolyte

The exploration of high-efficiency bifunctional electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) has long been challenging. The rational design of a catalyst by constructing heterostructures and a doping element are possibly expected to achieve it. Herein, the utilization of flower-like Fe/C-doped-MoS2/Ni3S2-450 spherical structural materials for electrocatalytic HER and OER is introduced in this study. The carboxyferrocene-incorporated molybdenum sulfide/nickel sulfide (MoySx/NiS) nanostructures were prepared by solvothermal method. After annealing, the iron and carbon elements derived from ferrocenecarboxylic acid enhanced the electrical transport performance and provided rich electronic sites for HER and OER in alkaline media. Specifically, the optimized flower-like Fe/C-doped-MoS2/Ni3S2-450 exhibited efficient bifunctional performance in alkaline electrolyte, with low overpotentials of 188 and 270 mV required to deliver a current density of 10 mA cm−2 for HER and OER, respectively. This work provides valuable insights for the rational design of energy storage and conversion materials by the incorporation of transition metal and carbon elements into metal sulfide structures utilizing metallocene.

Monolithic-structured ternary hydroxides as freestanding bifunctional electrocatalysts for overall water splitting

2016 ◽  
Vol 4 (19) ◽  
pp. 7245-7250 ◽  
Author(s):  
Xiaolin Zhu ◽  
Cheng Tang ◽  
Hao-Fan Wang ◽  
Bo-Quan Li ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
High Efficiency ◽  
Alkaline Media ◽  
Ni Foam ◽  
Overall Water Splitting ◽  
Bifunctional Electrocatalysts

Fully exposed ternary hydroxides electrodeposited on Ni foam (NiCoFe/NF) exhibited superb oxygen evolution and hydrogen evolution reactivity in alkaline media, and this monolithic-structured electrode further enabled a high-efficiency water electrolyzer.

scholarly journals Green synthesis of gold nanoparticles using Damiana induce antiseptic activity against gram-negative bacteria

2020 ◽  
Author(s):  
Luis Hernandez-Adame ◽  
Fernando Ruvalcaba ◽  
Miguel Ángel Ruíz-Gómez ◽  
Verónica Sánchez ◽  
Martha Reyes-Becerril ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Inductively Coupled Plasma ◽  
Metal Ion ◽  
Colloidal Stability ◽  
High Efficiency ◽  
Spherical Shape ◽  
Acrylonitrile Butadiene Styrene ◽  
Alkaline Media ◽  
Synthesis Methods ◽  
Gram Negative

Interest in green synthesis methods for nanoparticle production with potential use in biology, pharmacy, and medicine is a forefront field in research. Among the routes described in the literature, the use of plant extracts as reducing and capping agents is one of the most promising. Turnera diffusa commonly called Damiana is a wild shrub traditionally used as aphrodisiac, diuretic, and for cancer and diabetes treatments. Its extracts are rich in flavonoid, phenolic, terpenoid, and other active compounds that possess antiallergic, antiviral, and antifungal activities. Besides, flavonoids have been reported to have a redox potential sufficient for metal ion reduction. Thus, this study reports a novel and facile method for green gold nanoparticle (AuNPs) synthesis using T. diffusa extracts. The samples were fully characterized by scanning electron microscopy, acrylonitrile butadiene styrene ultraviolet-visible, dynamic light scattering, X-ray photoelectron, and inductively coupled plasma optical emission spectroscopies. The results showed high efficiency of T. diffusa extracts to reduce and stabilize the AuNPs which showed spherical shape, 24 nm diameter, negative surface charge, and high colloidal stability at biological pH and alkaline media. Additionally, its antimicrobial activity was evaluated showing high antiseptic capacity against gram-negative Salmonella enteritis and Escherichia coli ATCC 8739 bacteria.

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