scholarly journals Effect of Copper Alloying on Electro-Catalytic Activity of Nickel for Ethanol Oxidation in Alkaline Media

2018 ◽  
pp. 312-318
Author(s):  
Niloufar Bahrami Panah ◽  
Iman Danaee ◽  
Mahmood Payehghadr ◽  
Afrooz Madahi
Keyword(s):  
Catalytic Activity ◽  
Ethanol Oxidation ◽  
Alkaline Media ◽  
Effect Of Copper ◽  
Electro Catalytic Activity

Preparation of Rh/C and its high electro-catalytic activity for ethanol oxidation in alkaline media

RSC Advances ◽  
2015 ◽  
Vol 5 (111) ◽  
pp. 91829-91835 ◽  
Author(s):  
Fangfang Zhang ◽  
Debi Zhou ◽  
Zejie Zhang ◽  
Mingda Zhou ◽  
Qian Wang
Keyword(s):  
Catalytic Activity ◽  
Ethanol Oxidation ◽  
Alkaline Media ◽  
Ethanol Electrooxidation ◽  
Electro Catalytic Activity

The ethanol electrooxidation behaviors on Rh/C in alkaline media were studied compared with that on Pd/C.

Outstanding electro-catalytic activity of Pt x –(RuO y –CeO2)1−x /C composites towards ethanol oxidation in acid media

2013 ◽  
Vol 43 (9) ◽  
pp. 953-965 ◽  
Author(s):  
Lorenna L. A. Souza ◽  
Gláucia R. O. Almeida ◽  
Lays S. R. Silva ◽  
Franciele O. F. Bergamaski ◽  
Álvaro S. Lima ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ethanol Oxidation ◽  
Acid Media ◽  
Electro Catalytic Activity

Surfactant-Free Synthesis of PdPt/rGO for the Alkaline Ethanol Oxidation Reaction

NANO ◽  
2017 ◽  
Vol 12 (09) ◽  
pp. 1750105 ◽  
Author(s):  
Meiling Peng ◽  
Tao Wang ◽  
Zhenzhen Jiang ◽  
Sheng Wang
Keyword(s):  
Catalytic Activity ◽  
Oxidation Reaction ◽  
Ethanol Oxidation ◽  
Uv Light ◽  
Synthesis Method ◽  
Active Surface ◽  
Alkaline Media ◽  
Active Surface Area ◽  
Ethanol Oxidation Reaction ◽  
Direct Alcohol Fuel Cells

In this work, a synthesis method of residue-free PdPt nanodendrites on reduced graphene oxide (rGO) is reported. Using UV light as an energy trigger and methanol as the reducing agent, PdPt nanodendrites are synthesized with clean, residue-free surfaces (e.g., surfactant and polymer). In comparison with commercial Pd/C and Pt/C catalysts, the as-prepared PdPt nanodendrites on rGO have a large electrochemically active surface area, enhanced catalytic activity, high stability, and tolerance toward the ethanol oxidation reaction in alkaline media. Among the nanodendrite composites prepared, those containing a Pd:Pt ratio of 1:2 on rGO exhibit the best stability and durability, and their mass activity is 2.0 and 2.4 times greater than those of commercial Pt/C and Pd/C catalysts, respectively. This strategy presents an environmentally friendly way to fabricate other noble metal catalysts with improved catalytic activity and stability for use in direct alcohol fuel cells.

Enhanced catalytic activity of low-Pt content nanocatalysts supported on hollow carbon spheres for the ORR in alkaline media

MRS Advances ◽  
2020 ◽  
Vol 5 (57-58) ◽  
pp. 2961-2972
Author(s):  
P.C. Meléndez-González ◽  
E. Garza-Duran ◽  
J.C. Martínez-Loyola ◽  
P. Quintana-Owen ◽  
I.L. Alonso-Lemus ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Anion Exchange ◽  
Average Particle Size ◽  
Synthesis Method ◽  
Alkaline Media ◽  
High Catalytic Activity ◽  
Average Particle ◽  
Carbon Spheres ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

In this work, low-Pt content nanocatalysts (≈ 5 wt. %) supported on Hollow Carbon Spheres (HCS) were synthesized by two routes: i) colloidal conventional polyol, and ii) surfactant-free Bromide Anion Exchange (BAE). The nanocatalysts were labelled as Pt/HCS-P and Pt/HCS-B for polyol and BAE, respectively. The physicochemical characterization of the nanocatalysts showed that by following both methods, a good control of chemical composition was achieved, obtaining in addition well dispersed nanoparticles of less than 3 nm TEM average particle size (d) on the HCS. Pt/HCS-B contained more Pt0 species than Pt/HCS-P, an effect of the synthesis method. In addition, the structure of the HCS remains more ordered after BAE synthesis, compared to polyol. Regarding the catalytic activity for the Oxygen Reduction Reaction (ORR) in 0.5 M KOH, Pt/HCS-P and Pt/HCS-B showed a similar performance in terms of current density (j) at 0.9 V vs. RHE than the benchmark commercial 20 wt. % Pt/C. However, Pt/HCS-P and Pt/HCS-B demonstrated a 6 and 5-fold increase in mass catalytic activity compared to Pt/C, respectively. A positive effect of the high specific surface area of the HCS and its interactions with metal nanoparticles and electrolyte, which promoted the mass transfer, increased the performance of Pt/HCS-P and Pt/HCS-B. The high catalytic activity showed by Pt/HCS-B and Pt/HCS-P for the ORR, even with a low-Pt content, make them promising cathode nanocatalysts for Anion Exchange Membrane Fuel Cells (AEMFC).

Effects of Microwave-synthesizing Parameters on Structure and Electro-catalytic Activity of Pt2Mo/C towards Methanol Oxidation

2010 ◽  
Vol 25 (4) ◽  
pp. 359-364 ◽  
Author(s):  
Xin ZENG ◽  
Xian-Xia YUAN ◽  
Xiao-Yun XIA ◽  
Juan DU ◽  
Hui-Juan ZHANG ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Methanol Oxidation ◽  
Electro Catalytic Activity
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