Enhanced electrocatalytic activity of three-dimensionally-ordered macroporous La0.6Sr0.4CoO3−δ perovskite oxide for Li–O2 battery application

RSC Advances ◽  
2016 ◽  
Vol 6 (38) ◽  
pp. 32212-32219 ◽  
Author(s):  
Mi Young Oh ◽  
Jong Ju Lee ◽  
Awan Zahoor ◽  
G. Gnana kumar ◽  
Kee Suk Nahm
Keyword(s):  
Electrocatalytic Activity ◽  
Catalytic Performance ◽  
Perovskite Oxide ◽  
Ordered Macroporous ◽  
Battery Application

The 3DOM LSC exhibited a better catalytic performance than Powder LSC and improved the reversibility of the O2 electrode.

Three-dimensionally ordered macroporous spinel-type MCr2O4 (M = Co, Ni, Zn, Mn) catalysts with highly enhanced catalytic performance for soot combustion

2015 ◽  
Vol 5 (9) ◽  
pp. 4594-4601 ◽  
Author(s):  
Jinguo Wang ◽  
Gaoyang Yang ◽  
Li Cheng ◽  
Eun Woo Shin ◽  
Yong Men
Keyword(s):  
Catalytic Activity ◽  
Three Dimensional ◽  
Catalytic Performance ◽  
Soot Combustion ◽  
Spinel Type ◽  
Ordered Macroporous

MCr2O4 catalysts with three-dimensional ordered macroporous structures displayed superior catalytic activity for soot combustion to their bulk counterparts.

scholarly journals Synthesis and Characterization of Electrodeposited C-PANI-Pd-Ni Composite Electrocatalyst for Methanol Oxidation

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
S. S. Mahapatra ◽  
S. Shekhar ◽  
B. K. Thakur ◽  
H. Priyadarshi
Keyword(s):  
Methanol Oxidation ◽  
Electrocatalytic Activity ◽  
Electrochemical Impedance ◽  
Synergistic Effects ◽  
Catalytic Performance ◽  
Charge Transfer Resistance ◽  
Pani Film ◽  
Composite Electrodes ◽  
Transfer Resistance ◽  
Onset Potential

Electropolymerization of aniline at the graphite electrodes was achieved by potentiodynamic method. Electrodeposition of Pd (C-PANI-Pd) and Ni (C-PANI-Ni) and codeposition of Pd-Ni (C-PANI-Pd-Ni) microparticles into the polyaniline (PANI) film coated graphite (C-PANI) were carried out under galvanostatic control. The morphology and composition of the composite electrodes were obtained using scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDX) techniques. The electrochemical behavior and electrocatalytic activity of the electrode were characterized using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronoamperometric (CA) methods in acidic medium. The C-PANI-Pd-Ni electrode showed an improved catalytic performance towards methanol oxidation in terms of lower onset potential, higher anodic oxidation current, greater stability, lower activation energy, and lower charge transfer resistance. The enhanced electrocatalytic activity might be due to the greater permeability of C-PANI films for methanol molecules, better dispersion of Pd-Ni microparticles into the polymer matrixes, and the synergistic effects between the dispersed metal particles and their matrixes.

Facile synthesis of three-dimensional ordered macroporous Sr1−xKxTiO3 perovskites with enhanced catalytic activity for soot combustion

2018 ◽  
Vol 8 (21) ◽  
pp. 5462-5472 ◽  
Author(s):  
Peng Zhao ◽  
Nengjie Feng ◽  
Fan Fang ◽  
Geng Liu ◽  
Li Chen ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Three Dimensional ◽  
Catalytic Performance ◽  
Soot Combustion ◽  
Facile Synthesis ◽  
Ordered Macroporous

The appropriate incorporation of potassium into 3DOM SrTiO3 perovskites effectively improved the catalytic performance for soot combustion.

scholarly journals Comparison in thermal stability and catalytic performance of H4PMo11VO40 heteropolyacid supported on mesoporous and macroporous silica materials

2020 ◽  
pp. 174751982092599
Author(s):  
Heng Zhang ◽  
Chunhao Yang ◽  
Shengying Zhao ◽  
Tingting Wang ◽  
Wancheng Zhu
Keyword(s):  
Thermal Stability ◽  
Active Sites ◽  
Catalytic Performance ◽  
High Dispersion ◽  
High Exposure ◽  
Macroporous Silica ◽  
One Dimensional ◽  
Ordered Macroporous ◽  
The One ◽  
Mcm 41

Ordered mesoporous silica, SBA-15 and MCM-41, and three-dimensionally ordered macroporous SiO2 were used as the supports of H4PMo11VO40 heteropolyacid for methacrolein oxidation. The dispersion and structural evolutions of the heteropolyacid along with thermal treatment were investigated. It was found that the heteropolyacid entered the one-dimensional mesoporous channels of SBA-15 and MCM-41, and the crystallization and growth were limited, leading to high dispersion of the heteropolyacid. However, the thermal stability was decreased under high dispersion. The migration of the heteropolyacid was observed to the end of the one-dimensional channels of SBA-15 and the outer surface of MCM-41 with calcination, accompanied by the decomposition of the heteropolyacid and the formation of MoO3. In comparison, the crystallization and growth of heteropolyacid were not limited in the open macropores of three-dimensionally ordered macroporous SiO2. Dispersed particles on the surface of the macropores with size of about 5 nm exhibited a higher thermal stability. The decomposition of the heteropolyacid in the SBA-15 and MCM-41 supported catalysts resulted in the loss of strong acid sites, causing low selectivity to methacrylic acid in methacrolein oxidation. High thermal stability with high exposure of the active sites in the three-dimensionally ordered macroporous SiO2 supported catalyst contributed to the enhancement in the catalytic performance.

An unusual 32-membered copper(ii) metallomacrocube based on a Cu4O3X cubic core: photocatalytic, electrocatalytic, and magnetic properties

2016 ◽  
Vol 52 (23) ◽  
pp. 4294-4297 ◽  
Author(s):  
Sisi Feng ◽  
Fei Jia ◽  
Liping Lu ◽  
Zhongping Li ◽  
Shuo Zhang
Keyword(s):  
Magnetic Properties ◽  
Rhodamine B ◽  
Electrocatalytic Activity ◽  
Organic Pollutant ◽  
Catalytic Performance ◽  
Nitrite Reduction ◽  
Good Electrocatalytic Activity ◽  
Excellent Catalytic Performance

The first Cu32 cluster featuring a multi-cubane (Cu4O3X) structure exhibited excellent catalytic performance in the degradation of organic pollutant rhodamine B, good electrocatalytic activity for nitrite reduction, and strong antiferromagnetic interactions.

Synthesis of Cu–Ir nanocages with enhanced electrocatalytic activity for the oxygen evolution reaction

2015 ◽  
Vol 3 (39) ◽  
pp. 19669-19673 ◽  
Author(s):  
Chao Wang ◽  
Yongming Sui ◽  
Guanjun Xiao ◽  
Xinyi Yang ◽  
Yingjin Wei ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Catalytic Performance ◽  
Single Crystalline

Single-crystalline Cu1.11Ir nanocages were synthesized, which exhibited high catalytic performance toward the oxygen evolution reaction in 0.05 M H2SO4.

scholarly journals A new strategy for improving the electrochemical performance of perovskite cathodes: pre-calcining the perovskite oxide precursor in a nitrogen atmosphere

2021 ◽  
Author(s):  
Jing Chen ◽  
Zhenxiang Zhao ◽  
Yu Feng ◽  
Xuzhuo Sun ◽  
Bo Li ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Electrocatalytic Activity ◽  
Nitrogen Atmosphere ◽  
Perovskite Oxide ◽  
Oxide Precursor ◽  
New Strategy

This study demonstrates a new strategy to further improve the oxygen non-stoichiometry (δ) and electrocatalytic activity of cathode by pre-calcining the perovskite oxide precursor in nitrogen atmosphere.

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