Well-defined PtNiCo core–shell nanodendrites with enhanced catalytic performance for methanol oxidation

2016 ◽  
Vol 4 (46) ◽  
pp. 18015-18021 ◽  
Author(s):  
Rinrada Sriphathoorat ◽  
Kai Wang ◽  
Shuiping Luo ◽  
Min Tang ◽  
Hongyu Du ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Dendritic Structure ◽  
Catalytic Performance ◽  
Core Shell ◽  
Catalytic Activities

Uniform trimetallic PtNiCo core–shell nanodendrites, composed of a PtNiCo core and dendritic PtCo shell, were synthesized and their enhanced catalytic activities for methanol oxidation can be attributed to the interaction of Pt, Ni, and Co, and their highly ordered dendritic structure.

PtPd nanoframes derived from Pd@PdPt core–shell rhombic dodecahedrals with excellent catalytic performance toward methanol oxidation

2021 ◽  
Author(s):  
Yangyang Ren ◽  
Chuanliang Li ◽  
Baosong Li ◽  
Fan Gao ◽  
Xinghua Zhang ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Catalytic Properties ◽  
Catalytic Performance ◽  
Core Shell ◽  
Acid Environment ◽  
Excellent Catalytic Performance

PtPd nanoframes with excellent catalytic properties were obtained by etching Pd@PdPt core–shell RDs with Fe3+ in an acid environment.

Shell thickness controlled core–shell Fe3O4@CoO nanocrystals as efficient bifunctional catalysts for the oxygen reduction and evolution reactions

2019 ◽  
Vol 55 (4) ◽  
pp. 525-528 ◽  
Author(s):  
Lingshan Zhou ◽  
Binglu Deng ◽  
Zhongqing Jiang ◽  
Zhong-Jie Jiang
Keyword(s):  
Oxygen Reduction ◽  
Shell Thickness ◽  
Great Influence ◽  
Catalytic Performance ◽  
Core Shell ◽  
Bifunctional Catalysts ◽  
Catalytic Activities

Core–shell Fe3O4@CoO NCs have been demonstrated to be efficient catalysts for ORR and OER. The specific core/shell interaction can be ascribed to the main reason leading to their high catalytic performance. The shell thickness has a great influence on the catalytic activities.

Core-Shell Au-Pt Nanoparticles and Nanodendrites for Methanol Oxidation Reaction

2017 ◽  
Vol 1142 ◽  
pp. 234-237
Author(s):  
Hui Liu ◽  
Yan Feng ◽  
Jun Yang
Keyword(s):  
Methanol Oxidation ◽  
Oxidation Reaction ◽  
Au Nanoparticles ◽  
Pt Nanoparticles ◽  
Catalytic Performance ◽  
Methanol Oxidation Reaction ◽  
Core Shell ◽  
Molar Ratios ◽  
The Core ◽  
Growth Method

Controlling the morphology of platinum (Pt)-based nanomaterials is an effective strategy to enhance their catalytic performance for a given reaction. Here we report the syntheses of bimetallic Au-Pt nanomaterials with spherical or dendritic morphologies by a seed-mediated growth method. In this route, the gold (Au) nanoparticles are firstly prepared as seeds in oleylamine, which are subsequently seeded the growth of regular or dendritic Pt shells at different Au/Pt molar ratios. The electrochemical measurements show that the core-shell Au-Pt nanodendrites have better catalytic activity than that of core-shell Au-Pt nanoparticles for methanol oxidation reaction due to their abundant atomic steps, edges, and corner atoms in the branched Pt shells.

Superior co-catalysis by bimetallic nanostructure for TiO2 photocatalysis

2020 ◽  
Vol 01 ◽  
Author(s):  
Bonamali Pal ◽  
Anila Monga ◽  
Aadil Bathla
Keyword(s):  
Visible Light ◽  
Catalytic Performance ◽  
Transition Metal Catalysts ◽  
Core Shell ◽  
Structural Morphology ◽  
Tio2 Photocatalysis ◽  
Co Catalysts ◽  
Bimetallic Nanocomposites ◽  
Bimetallic Nanostructure ◽  
Bimetallic Nanostructures

Background:: Bimetallic nanocomposites have currently gained significant importance for enhanced catalytic applications relative to monometallic analogues. The synergistic interactions modified electronic and optical properties in the bimetallic (M1@M2) structural morphology e.g., core-shell /alloy nanostructures resulted in a better co-catalytic performance for TiO2 photocatalysis. Objective:: Hence, this article discusses the preparation, characterization, and co-catalytic activity of different bimetallic nanostructures namely, Cu@Zn, Pd@Au, Au@Ag, and Ag@Cu, etc. Method:: These bimetallic co-catalysts deposited on TiO2 possess the ability to absorb visible light due to surface plasmonic absorption and are also expected to display the new properties due to synergy between two distinct metals. As a result, they reveal the highest level of activity than the monometal deposited TiO2. Result:: Their optical absorption, emission, charge carrier dynamics, and surface structural morphology are explained for the improved photocatalytic activity of M1@M2 loaded TiO2 for the hydrogenation of certain organic compounds e.g., quinoline, crotonaldehyde, and 1,3-dinitrobenzene, etc. under UV/ visible light irradiation. Conclusion:: It revealed that the use of bimetallic core@shell co-catalyst for hydrogenation of important industrial organics by M1@M2-TiO2 nanocomposite demonstrates beneficial reactivity in many instances relative to conventional transition metal catalysts.

Catalytic performance of non-alloyed bimetallic PtAu electrocatalysts for methanol oxidation reaction

2017 ◽  
Vol 42 (51) ◽  
pp. 30109-30118 ◽  
Author(s):  
Yuan-Yuan Feng ◽  
Gui-Hua Song ◽  
Qiang Zhang ◽  
Hua-Shuai Hu ◽  
Mei-Ying Feng ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Oxidation Reaction ◽  
Catalytic Performance ◽  
Methanol Oxidation Reaction

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.

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