Enhanced Electrocatalytic Activities of PtCuCoNi Three-Dimensional Nanoporous Quaternary Alloys for Oxygen Reduction and Methanol Oxidation Reactions

2016 ◽  
Vol 8 (9) ◽  
pp. 6110-6116 ◽  
Author(s):  
Shaofang Fu ◽  
Chengzhou Zhu ◽  
Dan Du ◽  
Yuehe Lin
Keyword(s):  
Oxygen Reduction ◽  
Methanol Oxidation ◽  
Three Dimensional ◽  
Oxidation Reactions ◽  
Quaternary Alloys

Trimetallic PtNiCo branched nanocages as efficient and durable bifunctional electrocatalysts towards oxygen reduction and methanol oxidation reactions

2021 ◽  
Author(s):  
hengrui Ma ◽  
Zhiping Zheng ◽  
Hongsheng Zhao ◽  
Cong Shen ◽  
Hanming Chen ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Methanol Oxidation ◽  
Oxidation Reaction ◽  
Reduction Reaction ◽  
Great Promise ◽  
Methanol Oxidation Reaction ◽  
Oxidation Reactions ◽  
Bifunctional Electrocatalysts ◽  
Composition And Structure

Engineering the composition and structure of Pt-based alloy electrocatalysts has exhibited great promise for enhancing activity and durability in oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR). However, it...

A Comparative Study on Ternary Low-Platinum Catalysts with Various Constructions for Oxygen Reduction and Methanol Oxidation Reactions

NANO ◽  
2016 ◽  
Vol 11 (07) ◽  
pp. 1650081 ◽  
Author(s):  
Yan Ni Wu ◽  
Hai Fu Guo ◽  
Peng Hu ◽  
Xiao Peng Xiao ◽  
Zhao Wang Xiao ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Methanol Oxidation ◽  
Reduction Reaction ◽  
Methanol Oxidation Reaction ◽  
Core Shell ◽  
Oxidation Reactions ◽  
X Ray Diffraction ◽  
Structured Catalyst ◽  
Transmission Electron ◽  
One Step

Three types of ternary low-platinum nanocatalysts, alloy PdPtIr/C, core–shell PdPt@PtIr/C and Pd@PtIr/C, have been prepared, and their catalytic behaviors toward methanol oxidation reaction (MOR)/oxygen reduction reaction (ORR) are comparatively investigated via cyclic voltammetry and chronoamperometry analysis in an acidic medium. Through a two-step colloidal technique, the synthesized core–shell structured catalyst PtPd@PtIr/C with alloy core and alloy shell show the best catalytic activity toward MOR and the best poisoning tolerance. The alloy PdPtIr/C catalyst prepared via a one-step colloidal technique exhibits the best performance toward ORR among the three catalysts. All the three catalysts are characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and other characterization techniques.

scholarly journals New Insights into the Electrocatalytic Mechanism of Methanol Oxidation on Amorphous Ni-B-Co Nanoparticles in Alkaline Media

Catalysts ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 749 ◽  
Author(s):  
Wu ◽  
Zhang ◽  
Zhang ◽  
Duan ◽  
Li ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Amorphous Materials ◽  
Reaction Order ◽  
Chemical Reduction ◽  
Three Dimensional ◽  
Kinetic Studies ◽  
Alkaline Media ◽  
Methanol Oxidation Reaction ◽  
Oxidation Reactions ◽  
Co Nanoparticles

Despite an increased interest in sustainable energy conversion systems, there have been limited studies investigating the electrocatalytic reaction mechanism of methanol oxidation on Ni-based amorphous materials in alkaline media. A thorough understanding of such mechanisms would aid in the development of amorphous catalytic materials for methanol oxidation reactions. In the present work, amorphous Ni-B and Ni-B-Co nanoparticles were prepared by a simple chemical reduction, and their electrocatalytic properties were investigated by cyclic voltammetry measurements. The diffusion coefficients (D0) for Ni-B, Ni-B-Co0.02, Ni-B-Co0.05, and Ni-B-Co0.1 nanoparticles were calculated to be 1.28 × 10−9, 2.35 × 10−9, 4.48 × 10−9 and 2.67 × 10−9 cm2 s−1, respectively. The reaction order of methanol in the studied transformation was approximately 0.5 for all studied catalysts, whereas the reaction order of the hydroxide ion was nearly 1. The activation energy (Ea) values of the reaction were also calculated for the Ni-B and Ni-B-Co nanoparticle systems. Based on our kinetic studies, a mechanism for the methanol oxidation reaction was proposed which involved formation of an electrocatalytic layer on the surface of amorphous Ni–B and Ni-B-Co nanoparticles. And methanol and hydroxide ions could diffuse freely through this three-dimensional porous conductive layer.

scholarly journals Hierarchically skeletal multi-layered Pt-Ni nanocrystals for highly efficient oxygen reduction and methanol oxidation reactions

2021 ◽  
Vol 42 (4) ◽  
pp. 648-657
Author(s):  
Shibo Li ◽  
Zhi Qun Tian ◽  
Yang Liu ◽  
Zheng Jang ◽  
Syed Waqar Hasan ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Methanol Oxidation ◽  
Oxidation Reactions ◽  
Highly Efficient

Fuel Cells: Porous Platinum Nanotubes for Oxygen Reduction and Methanol Oxidation Reactions (Adv. Funct. Mater. 21/2010)

2010 ◽  
Vol 20 (21) ◽  
pp. 3617-3617 ◽  
Author(s):  
Shaun M. Alia ◽  
Gang Zhang ◽  
David Kisailus ◽  
Dongsheng Li ◽  
Shuang Gu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Oxygen Reduction ◽  
Methanol Oxidation ◽  
Oxidation Reactions

Bimetallic PtAu superlattice arrays: Highly electroactive and durable catalyst for oxygen reduction and methanol oxidation reactions

2016 ◽  
Vol 330 ◽  
pp. 140-148 ◽  
Author(s):  
Jiu-Ju Feng ◽  
Li-Li He ◽  
Rui Fang ◽  
Qiao-Li Wang ◽  
Junhua Yuan ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Methanol Oxidation ◽  
Oxidation Reactions

Insights into the morphology and composition effects of one-dimensional CuPt nanostructures on the electrocatalytic activities and methanol oxidation mechanism by in situ FTIR

Nanoscale ◽  
2020 ◽  
Vol 12 (25) ◽  
pp. 13688-13696 ◽  
Author(s):  
Ping Li ◽  
Cheng Du ◽  
Xiaohui Gao ◽  
Zhihua Zhuang ◽  
Dong Xiang ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Methanol Oxidation ◽  
Oxidation Mechanism ◽  
In Situ Ftir ◽  
Oxidation Reactions ◽  
One Dimensional ◽  
Composition Effects

Structure- and composition-optimized CuPt2.22 nanowires show excellent electrocatalytic activities for the oxygen reduction and methanol oxidation reactions.

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