scholarly journals First synthesis of air-stable NiZn homogeneous alloy nanoparticles through chemical reduction

2021 ◽  
Author(s):  
Shinya Okamoto ◽  
Kohei Kusada ◽  
Hiroshi Hashiba ◽  
Satoshi Yotsuhashi ◽  
Hiroshi Kitagawa
Keyword(s):  
Chemical Reduction ◽  
Alloy Nanoparticles ◽  
Sodium Naphthalenide ◽  
Zn Ions

Air-stable NiZn homogeneous alloy nanoparticles were synthesized by sodium–naphthalenide-driven reduction at the controlled reduction speed of Ni and Zn ions.

Synthesis of CuxNi1−x alloy nanoparticles from double complex salts and investigation of their magnetoimpedance effects

RSC Advances ◽  
2015 ◽  
Vol 5 (88) ◽  
pp. 71601-71607 ◽  
Author(s):  
Seyed Abolghasem Kahani ◽  
Mansoure Shahrokh
Keyword(s):  
Reduction Method ◽  
Chemical Reduction ◽  
Alloy Nanoparticles ◽  
Chemical Reduction Method ◽  
Double Complex ◽  
Double Complex Salts ◽  
Complex Salts

This work is a novel study of the synthesis of CuxNi1−x nanoalloy from double complex salts by chemical reduction method.

Ammonia synthesis over Co–Mo alloy nanoparticle catalyst prepared via sodium naphthalenide-driven reduction

2016 ◽  
Vol 52 (100) ◽  
pp. 14369-14372 ◽  
Author(s):  
Yuki Tsuji ◽  
Masaaki Kitano ◽  
Kazuhisa Kishida ◽  
Masato Sasase ◽  
Toshiharu Yokoyama ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ammonia Synthesis ◽  
Alloy Nanoparticles ◽  
Bimetallic Alloy ◽  
Sodium Naphthalenide ◽  
Nanoparticle Catalyst

Co–Mo bimetallic alloy nanoparticles immobilized on CeO2 prepared via sodium naphthalenide-driven reduction exhibit efficient and stable catalytic activity for ammonia synthesis.

scholarly journals Hydrogen Production from Ammonia Borane over PtNi Alloy Nanoparticles Immobilized on Graphite Carbon Nitride

Catalysts ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1009 ◽  
Author(s):  
Mingya Zhang ◽  
Xue Xiao ◽  
Yan Wu ◽  
Yue An ◽  
Lixin Xu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Performance ◽  
Carbon Nitride ◽  
Heterogeneous Catalysts ◽  
Chemical Reduction ◽  
Ammonia Borane ◽  
Superior Performance ◽  
Alloy Nanoparticles ◽  
Total Turnover ◽  
Ptni Alloy

Graphite carbon nitride (g-C3N4) supported PtNi alloy nanoparticles (NPs) were fabricated via a facile and simple impregnation and chemical reduction method and explored their catalytic performance towards hydrogen evolution from ammonia borane (AB) hydrolysis dehydrogenation. Interestingly, the resultant Pt0.5Ni0.5/g-C3N4 catalyst affords superior performance, including 100% conversion, 100% H2 selectivity, yielding the extraordinary initial total turnover frequency (TOF) of 250.8 molH2 min−1 (molPt)−1 for hydrogen evolution from AB at 10 °C, a relatively low activation energy of 38.09 kJ mol−1, and a remarkable reusability (at least 10 times), which surpass most of the noble metal heterogeneous catalysts. This notably improved activity is attributed to the charge interaction between PtNi NPs and g-C3N4 support. Especially, the nitrogen-containing functional groups on g-C3N4, serving as the anchoring sites for PtNi NPs, may be beneficial for becoming a uniform distribution and decreasing the particle size for the NPs. Our work not only provides a cost-effective route for constructing high-performance catalysts towards the hydrogen evolution of AB but also prompts the utilization of g-C3N4 in energy fields.

Preparation and characterization of Cu–Co alloy nanoparticles from double complex salts by chemical reduction

2015 ◽  
Vol 39 (10) ◽  
pp. 7916-7922 ◽  
Author(s):  
Seyed Abolghasem Kahani ◽  
Mansoure Shahrokh
Keyword(s):  
Reduction Method ◽  
Chemical Reduction ◽  
Alloy Nanoparticles ◽  
Chemical Reduction Method ◽  
Double Complex ◽  
Double Complex Salts ◽  
Complex Salts

This work is a novel study of the synthesis of Cu–Co nanoalloy from double complex salts by chemical reduction method.

scholarly journals Spectroscopic Analysis of Au-Cu Alloy Nanoparticles of Various Compositions Synthesized by a Chemical Reduction Method

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Latif-ur-Rahman ◽  
Afzal Shah ◽  
Rumana Qureshi ◽  
Sher Bahadar Khan ◽  
Abdullah M. Asiri ◽  
...  
Keyword(s):  
Reduction Method ◽  
Chemical Reduction ◽  
Average Diameter ◽  
Alloy Nanoparticles ◽  
X Ray Diffraction ◽  
Chemical Reduction Method ◽  
Cu Alloy ◽  
Sem And Tem ◽  
Number Of Binding Sites ◽  
Free Energy Of Binding

Au-Cu alloy nanoparticles were synthesized by a chemical reduction method. Five samples having different compositions of Au and Cu (Au-Cu 3 : 1, Au-Cu 2 : 1, Au-Cu 1 : 1, Au-Cu 1 : 2, and Au-Cu 1 : 3) were prepared. The newly synthesized nanoparticles were characterized by electronic absorption, fluorescence, and X-ray diffraction spectroscopy (XRD). These alloy nanoparticles were also analyzed by SEM and TEM. The particle size was determined by SEM and TEM and calculated by Debye Scherrer’s equation as well. The results revealed that the average diameter of nanoparticles gets lowered from 80 to 65 nm as the amount of Cu is increased in alloy nanoparticles. Some physical properties were found to change with change in molar composition of Au and Cu. Most of the properties showed optimum values for Au-Cu alloy nanoparticles of 1 : 3. Cu in Au-Cu alloy caused decrease in the intensity of the emission peak and acted as a quencher. The fluorescence data was utilized for the evaluation of number of binding sites, total number of atoms in alloy nanoparticle, binding constant, and free energy of binding while morphology was deduced from SEM and TEM.

scholarly journals Hydrogenation Production from Ammonia Borane over PtNi Alloy Nanoparticles Immobilized on Graphite Carbon Nitride

2019 ◽  
Author(s):  
Mingya Zhang ◽  
Xue Xiao ◽  
Yan Wu ◽  
Yue An ◽  
Lixin Xu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
High Performance ◽  
Carbon Nitride ◽  
Heterogeneous Catalysts ◽  
Chemical Reduction ◽  
Ammonia Borane ◽  
Superior Performance ◽  
Alloy Nanoparticles ◽  
Total Turnover ◽  
Ptni Alloy

Graphite carbon nitride (g-C3N4) supported PtNi alloy nanoparticles (NPs) were fabricated via a facile and simple impregnation and chemical reduction method and explored their catalytic performance towards hydrogen evolution from ammonia borane (AB). Interestingly, the resultant Pt0.5Ni0.5/g-C3N4 catalyst affords superior performance, including 100% conversion, 100% H2 selectivity, yielding the extraordinary initial total turnover frequency (TOF) of 250.8 molH2 min-1 (molPt)-1 for hydrogen evolution from AB at 10 °C, a relatively low activation energy of 38.09 kJ mol−1, and a remarkable reusability (at least 10 times), which surpass most of the noble metal heterogeneous catalysts. This notably improved activity is attributed to the charge interaction between PtNi NPs and g-C3N4 support. Especially, the nitrogen-containing functional groups on g-C3N4, serving as the anchoring sites for PtNi NPs, may be beneficial for becoming a uniform distribution and decreasing the particle size for the NPs. Our work not only provides a cost-effective route for constructing high-performance catalysts towards the hydrogen evolution of AB but also prompts the utilization of g-C3N4 in energy fields.

Soft Template CTAB-Assisted Synthesis of Mesoporous Ni-B Amorphous Alloy Nanoparticles

2013 ◽  
Vol 785-786 ◽  
pp. 386-389
Author(s):  
Guang Ya Hou ◽  
Qi Bin Wen ◽  
Yi Ping Tang ◽  
Hua Zhen Cao ◽  
Guo Qu Zheng
Keyword(s):  
Amorphous Alloy ◽  
Surface Area ◽  
Chemical Reduction ◽  
Mesoporous Structure ◽  
Phase Evolution ◽  
Soft Template ◽  
Ammonium Bromide ◽  
Alloy Nanoparticles ◽  
Ctab Solution ◽  
Direct Methanol

Ni-B amorphous alloy particle is a newly promising candidate of catalyst for methanol electrooxidation in Direct Methanol Fuel Cell (DMFC). For enhancing catalytic activity and increasing surface area, mesoporous Ni-B amorphous alloy nanoparticles was manufactured by chemical reduction of NiCl2 and KBH4 via surfactant hexadecyltrimethyl ammonium bromide (CTAB) as an soft template. The effects of the CTAB content and the feeding order on the phase evolution, microstructure, and surface area of the resulting products were investigated. Phase and structure of the samples were investigated using XRD, SEM and BET. Amorphous Ni-B nanoparticles with mesoporous structure were obtained in this study. The CTAB content great impacted the mesoporous structure of the resulting products, although the obviously effect on the phase was not found. The surface area, pore volume and pore diameter of samples improved with the increase of CTAB content. Compared to nanoparticles obtained by CTAB solution added to NiCl2 solution, nanoparticles obtained by NiCl2 solution added to CTAB solution exhibited better mesoporous structure.

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