scholarly journals Nano-Sized NiO Immobilized on Au/CNT for Benzyl Alcohol Oxidation: Influences of Hybrid Structure and Interface

Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6276
Author(s):  
Yixue Zhou ◽  
Fengxiang Shan ◽  
Sihan Yang ◽  
Jingjie Luo ◽  
Changhai Liang

Tiny gold nanoparticles were successfully anchored on carbon nanotubes (CNT) with NiO decoration by a two-step synthesis. Characterizations suggested that Ni species in an oxidative state preferred to be highly dispersed on CNT. During the synthesis, in situ reduction by NaBH4 and thermal treatment in oxidation atmosphere were consequently carried out, causing the formation of Au-Ni-Ox interfaces and bimetal hybrid structure depending on the Ni/Au atomic ratios. With an appropriate Ni/Au atomic ratio of 8:1, Ni atoms migrated into the sub-layers of Au particles and induced the lattice contraction of Au particles, whilst a higher Ni/Au atomic ratio led to the accumulation of NiO fractions surrounding Au particles. Both contributed to the well-defined Au-Ni-Ox interface and accelerated reaction rates. Nickel species acted as structure promoters with essential Au-Ni-Ox hybrid structure as well as the active oxygen supplier, accounting for the enhanced activity for benzyl alcohol oxidation. However, the over-layer of unsaturated gold sites easily occured under a high Ni/Au ratio, resulting in a lower reaction rate. With an Au/Ni atomic ratio of 8:1, the specific rate of AuNi8/CNT reached 185 μmol/g/s at only 50 °C in O2 at ordinary pressure.

2021 ◽  
Author(s):  
Kadriye Özlem Hamaloğlu ◽  
Rukiye Babacan Tosun ◽  
Serap Ulu ◽  
Hakan Kayi ◽  
Cengiz Kavaklı ◽  
...  

A synergistic catalyst in the form of monodisperse-porous CeO2 microspheres supported Pd nanoparticles (Pd NPs) was synthesized. CeO2 microspheres 4 μm in size were obtained by a newly developed “sol-gel...


ChemCatChem ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 3464-3473 ◽  
Author(s):  
Aditya Savara ◽  
Carine E. Chan-Thaw ◽  
Ilenia Rossetti ◽  
Alberto Villa ◽  
Laura Prati

Author(s):  
Mingchuang Shen ◽  
Yingzhang Shi ◽  
Zhiwen Wang ◽  
Taikang Wu ◽  
Ling Hu ◽  
...  

Author(s):  
Zhen Li ◽  
Junhao Zhang ◽  
Xiaoting Jing ◽  
Jing Dong ◽  
Huifang Liu ◽  
...  

Electrocatalytic oxidation has been proven as a sustainable and promising alternative to traditional chemical transformation, but its further development is limited by the use of noble-metal electrocatalysts.


ACS Catalysis ◽  
2021 ◽  
pp. 12075-12086
Author(s):  
Emmanouil Nikoloudakis ◽  
Palas Baran Pati ◽  
Georgios Charalambidis ◽  
Darya S. Budkina ◽  
Stéphane Diring ◽  
...  

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