Influence of structure on catalytic activity of nano - manganese oxide

2020 ◽  
Vol 171 ◽  
pp. 108681
Author(s):  
R. Puspalata ◽  
D. Mal ◽  
S. Amirthapandian ◽  
S. Rangarajan
2019 ◽  
Vol 9 (15) ◽  
pp. 4108-4117 ◽  
Author(s):  
Xiaomin Wu ◽  
Xiaolong Yu ◽  
Ziyi Chen ◽  
Zhiwei Huang ◽  
Guohua Jing

Substitutionally doped oxide catalysts with abundant oxygen vacancy defects (OVDs) can effectively improve the catalytic activity efficiency.


2014 ◽  
Vol 3 (1) ◽  
pp. 88-102 ◽  
Author(s):  
Mahadevaiah Rekha ◽  
Hagalahalli Hareesh ◽  
Nagaraju Kathyayini ◽  
Narasimaiah Nagaraju

2012 ◽  
Vol 15 (4) ◽  
pp. 249-254 ◽  
Author(s):  
Ramanujam Kannan ◽  
Kulandaivelu Karunakaran ◽  
Samuel Vasanthkumar

Octahedral molecular sieve type manganese oxide (OMO) was synthesized by the ultra sonic assisted hydrothermal method, and was subsequently used as supportive material for palladium (Pd) metal towards the electrooxidation of methanol and ethylene glycol. The Pd nanoparticles were coated on the OMO by insitu reduction method. Low quantity of 5% Pd metal was used and the electrocatalytic activity was studied. The prepared OMO and the OMO/Pd nanocomposite were characterized by powder X–ray diffractogram (XRD), Scanning Electron Microscopy (SEM), Energy dispersive X–ray spectroscopy (EDS) and electrochemical methods. These studies demonstrated that the OMO can act as a good catalyst supporting material. The OMO helps to enhance the catalytic activity of Pd metal by supplying the active oxygen, which is extracted from the electrolytic solution. The electrooxidation of EG shows improved catalytic activity.


2011 ◽  
Vol 21 (12) ◽  
pp. 2301-2310 ◽  
Author(s):  
Tae Woo Kim ◽  
Hana Yoo ◽  
In Young Kim ◽  
Hyung-Wook Ha ◽  
Ah Reum Han ◽  
...  

2016 ◽  
Vol 4 (17) ◽  
pp. 6585-6594 ◽  
Author(s):  
Feng Rong ◽  
Jiao Zhao ◽  
Zheng Chen ◽  
Yuxing Xu ◽  
Yaopeng Zhao ◽  
...  

Nanostructured biomimetic birnessite CaxMnOy oxides with an intermediate Mn oxidation state and proper structural distortion show improved catalytic activity for the WOR.


2020 ◽  
Vol 21 (2) ◽  
pp. 190
Author(s):  
Sri Rahayu ◽  
Netti Herawati ◽  
Mohammad Wijaya

Telah dilakukan penelitian tentang sintesis nanopartikel mangan oksida menggunakan prekursor KMnO4 dengan metode sol gel, dengan menambahkan aditif etilendiamin dan etilen glikol yang berperan sebagai agen penstabil, selanjutnya menguji aktivitas katalitik dari mangan oksida tersebut terhadap proses degradasi warna rhodamin B. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan zat aditif terhadap ukuran dan bentuk nanopartikel yang dihasilkan serta kemampuannya sebagai katalis dalam proses degradasi zat warna rhodamin B. Nanopartikel yang diperoleh, dikarakterisasi menggunakan XRD (X-Ray Diffraction) dan SEM (Scanning Elektron Microscope) serta penentuan aktivitas katalitik dalam proses degradasi terhadap zat warna rhodamin B dengan spektrofotometer UV-Vis. Hasil penelitian menunjukkan sintesis nanopartikel menggunakan aditif etilendiamin lebih baik dibandingkan dengan aditif etilen glikol karena ukuran nanopartikel berkisar antara 5,66-33,38 dalam bentuk tetragonal. Morfologi nanopartikel mangan oksida terlihat berbentuk bulat yang seragam. Nanopartikel mangan oksida hasil sintesis mampu mempercepat proses degradasi warna rhodamin B dengan persentase degradasi mencapai 85,6%. Kata kunci: Nanopartikel, Mangan Oksida , Sol gel dan Rhodamin B ABSTRACT Research has been carried out on the synthesis of manganese oxide nanoparticles using KMnO4 precursors with the sol gel method, by adding ethylenediamine and ethylene glycol additives which act as stabilizing agents, then tested the catalytic activity of the manganese oxide on the degradation process of Rhodamine B. This study aims to determine the effect of adding substances additives on the size and shape of the nanoparticles were produced and their ability as catalysts in the degradation process of Rhodamin B. Nanoparticles were obtained, characterized using XRD (X-Ray Diffraction)and SEM (Scanning Elektron Microscope)and determination of catalytic activity in the degradation process of rhodamine B dyes with UV-Vis spectrophotometer. The results showed that the synthesis of nanoparticles using ethylenediamine additives was better than ethylene glycol additives because the size of the nanoparticles ranged from 5.66 to 33.38 in the tetragonal form. The morphology of manganese oxide nanoparticles looks uniform in shape. Manganese oxide nanoparticles can accelerate the degradation process of Rhodamin B with a percentage of degradation reaching 85.6%. Keywords: Nanoparticles, Manganese Oxide, Sol gel and Rhodamin B


2015 ◽  
Vol 51 (100) ◽  
pp. 17728-17731 ◽  
Author(s):  
Yu-Xin Miao ◽  
Wen-Cui Li ◽  
Qiang Sun ◽  
Lei Shi ◽  
Lei He ◽  
...  

The exceptionally high catalytic activity for CO-PROX reaction is due to the Au–support interaction and the unique reducibility of the support.


2005 ◽  
Vol 252 (5) ◽  
pp. 1211-1220 ◽  
Author(s):  
V.S. Rudnev ◽  
M.S. Vasilyeva ◽  
N.B. Kondrikov ◽  
L.M. Tyrina

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