Colloidal synthesis of iridium-iron nanoparticles for electrocatalytic oxygen evolution

2017 ◽  
Vol 1 (5) ◽  
pp. 1199-1203 ◽  
Author(s):  
Luhong Fu ◽  
Ping Cai ◽  
Gongzhen Cheng ◽  
Wei Luo
Keyword(s):  
Synergistic Effect ◽  
Iron Nanoparticles ◽  
Molecular Level ◽  
Iron Alloy ◽  
Average Diameter ◽  
Colloidal Synthesis ◽  
Alkaline Condition ◽  
Synthetic Method ◽  
Alloy Nanoparticles ◽  
A Current

Iridium-iron alloy nanoparticles with an average diameter of 2.4 nm have been synthesized by a colloidal synthetic method. By taking advantage of the synergistic effect between Ir and Fe at the molecular level, the as-synthesized IrFe/C catalyst exhibits OER performance with exceptional overpotentials of 278 and 286 mV at a current density of 10 mA cm−2 in acidic and alkaline condition, respectively.

Colloidal synthesis of monodisperse trimetallic IrNiFe nanoparticles as highly active bifunctional electrocatalysts for acidic overall water splitting

2017 ◽  
Vol 5 (47) ◽  
pp. 24836-24841 ◽  
Author(s):  
Luhong Fu ◽  
Gongzhen Cheng ◽  
Wei Luo
Keyword(s):  
Synergistic Effect ◽  
Size Distribution ◽  
Water Splitting ◽  
Average Diameter ◽  
Colloidal Synthesis ◽  
Synthetic Method ◽  
Alloy Nanoparticles ◽  
Narrow Size Distribution ◽  
Acidic Media ◽  
Highly Active

Monodisperse IrNiFe alloy nanoparticles with an average diameter of 2.2 nm have been synthesized by a colloidal synthetic method. By taking advantage of the synergistic effect between Ir, Ni and Fe and the ultrasmall NPs with narrow size distribution, the as-synthesized IrNiFe catalyst exhibits superior HER/OER performances in acidic media.

Pt–Co Alloy Nanoparticles on a γ‐Al 2 O 3 Support: Synergistic Effect between Isolated Electron‐Rich Pt and Co for Automotive Exhaust Purification

ChemPlusChem ◽  
2019 ◽  
Vol 84 (5) ◽  
pp. 447-456 ◽  
Author(s):  
Katsutoshi Sato ◽  
Ayano Ito ◽  
Hiroyuki Tomonaga ◽  
Homare Kanematsu ◽  
Yuichiro Wada ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Alloy Nanoparticles ◽  
Automotive Exhaust ◽  
Exhaust Purification ◽  
Automotive Exhaust Purification

Micromixer: An Effective Tool for the Production of Sub-Nanosized Noble Metal Particles

2020 ◽  
Vol 19 (06) ◽  
pp. 2050013
Author(s):  
M. Jakir Hossain ◽  
Md Saidur Rahman ◽  
Md Jafar Sharif
Keyword(s):  
Reduction Method ◽  
Molecular Level ◽  
Reaction System ◽  
Average Diameter ◽  
Metal Particles ◽  
Au Nps ◽  
Reducing Ability ◽  
Transmission Electron ◽  
Metal Precursors ◽  
Ftir Spectrometry

This paper demonstrates the functionality of a simple and convenient microfluidic method in synthesizing a series of poly(vinylpyrrolidone) (PVP) stabilized nanoparticles (NPs) of various novel metals (Pt, Pd, Ru, Rh, Ag, and Au) with an average diameter of [Formula: see text]2 nm. In this method, the use of microfluidic mixture provided a homogenous mixing of the metal precursors and reducing agent nearly at the molecular level, that yield monodispersed sub-nanosize NPs. Core diameters of the produced NPs determined by transmission electron microscopy (TEM), were [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text][Formula: see text]nm for Pt, Pd, Ru, Rh, Ag and Au NPs, respectively. Of them, Pt NPs were detailed characterized. The obtained Pt NPs were found to have fcc crystal structure with 1.2 nm crystalline size which is very similar to the corresponding TEM result. The efficiency of the synthesis of NPs by micromixer was compared with batch/NaBH4 reduction method for the Pt NPs. It was found that in batch method the as-prepared NPs decreased the reducing ability of NaBH4 by catalytic degradation. In contrast, the micromixer could separate the produced metal NPs from the reaction system soon after the formation of NPs and enables feeding the fresh NaBH4 solution throughout the synthesis. Fourier Transform Infrared (FTIR) spectrometry measurements of adsorbed [Formula: see text]CO molecules on Pt NPs showed that the NPs surface were negatively charged with a high population of edge and vertices atoms.

X-ray absorption fine structure study of enhanced sequestration of U(vi) and Se(iv) by montmorillonite decorated with zero-valent iron nanoparticles

2016 ◽  
Vol 3 (6) ◽  
pp. 1460-1472 ◽  
Author(s):  
Baowei Hu ◽  
Feng Ye ◽  
Xuemei Ren ◽  
Donglin Zhao ◽  
Guodong Sheng ◽  
...  
Keyword(s):  
Fine Structure ◽  
Synergistic Effect ◽  
Iron Nanoparticles ◽  
Structure Study ◽  
Zero Valent Iron ◽  
X Ray ◽  
Absorption Fine ◽  
Zero Valent Iron Nanoparticles ◽  
X Ray Absorption

The sequestration of U(vi) on NZVI/Na-Mont and Se(iv) on NZVI/Al-Mont enhanced due to the synergistic effect between adsorption and reduction.

Platinum and platinum–iron alloy nanoparticles dispersed nitrogen-doped graphene as high performance room temperature hydrogen sensor

2015 ◽  
Vol 40 (32) ◽  
pp. 10346-10353 ◽  
Author(s):  
Raghu Sripada ◽  
Vinayan Bhagavathi Parambath ◽  
Mridula Baro ◽  
Santhosh P Nagappan Nair ◽  
Ramaprabhu Sundara
Keyword(s):  
High Performance ◽  
Room Temperature ◽  
Iron Alloy ◽  
Hydrogen Sensor ◽  
Alloy Nanoparticles ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

scholarly journals Templated synthesis of gold–iron alloy nanoparticles using pulsed laser deposition

2006 ◽  
Vol 17 (20) ◽  
pp. 5131-5135 ◽  
Author(s):  
Won-Suk Chang ◽  
Jin-Won Park ◽  
Vijay Rawat ◽  
Timothy Sands ◽  
Gil U Lee
Keyword(s):  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Iron Alloy ◽  
Laser Deposition ◽  
Alloy Nanoparticles ◽  
Templated Synthesis

Synergistic effects in Fe nanoparticles doped with ppm levels of (Pd + Ni). A new catalyst for sustainable nitro group reductions

2018 ◽  
Vol 20 (1) ◽  
pp. 130-135 ◽  
Author(s):  
Haobo Pang ◽  
Fabrice Gallou ◽  
Hyuntae Sohn ◽  
Jeffrey Camacho-Bunquin ◽  
Massimiliano Delferro ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Nitro Group ◽  
Iron Nanoparticles ◽  
Synergistic Effects ◽  
Fe Nanoparticles

A synergistic effect has been uncovered between ppm levels of Pd and Ni embedded within iron nanoparticles that leads to selective catalytic reductions of nitro-containing aromatics in water.

A Highly Active and Coke-Resistant Steam Reforming Catalyst Comprising Uniform Nickel-Iron Alloy Nanoparticles

ChemSusChem ◽  
2012 ◽  
Vol 5 (12) ◽  
pp. 2312-2314 ◽  
Author(s):  
Mitsuru Koike ◽  
Dalin Li ◽  
Yoshinao Nakagawa ◽  
Keiichi Tomishige
Keyword(s):  
Steam Reforming ◽  
Iron Alloy ◽  
Alloy Nanoparticles ◽  
Nickel Iron ◽  
Highly Active ◽  
Reforming Catalyst ◽  
Nickel Iron Alloy

Pony-Size Silver-Copper and Silver-Iron Alloy Nanoparticles Confined in N-Free Mesoporous Carbon for Efficient Oxygen Electroreduction

2019 ◽  
Vol 166 (8) ◽  
pp. H272-H282
Author(s):  
Yu Qiao ◽  
Yangyang Ni ◽  
Zhengyan Chen ◽  
Fantao Kong ◽  
Ruijing Li ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Iron Alloy ◽  
Oxygen Electroreduction ◽  
Alloy Nanoparticles ◽  
Silver Copper
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