Surface modification of Pt nanoparticles with other metals boosting the alkaline hydrogen oxidation reaction

2019 ◽  
Vol 55 (21) ◽  
pp. 3101-3104 ◽  
Author(s):  
Keiichi Okubo ◽  
Junya Ohyama ◽  
Atsushi Satsuma
Keyword(s):  
Surface Modification ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Pt Nanoparticles ◽  
Hydrogen Oxidation Reaction ◽  
Alkaline Conditions

To enhance the hydrogen oxidation reaction (HOR) activity of Pt/C under alkaline conditions, the catalyst's surface was modified with fifteen metals.

A novel IrNi@PdIr/C core–shell electrocatalyst with enhanced activity and durability for the hydrogen oxidation reaction in alkaline anion exchange membrane fuel cells

Nanoscale ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 4872-4881 ◽  
Author(s):  
Bowen Qin ◽  
Hongmei Yu ◽  
Jia Jia ◽  
Chi Jun ◽  
Xueqiang Gao ◽  
...  
Keyword(s):  
Anion Exchange ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Anion Exchange Membrane ◽  
Core Shell ◽  
Hydrogen Oxidation Reaction ◽  
Oxidation Activity ◽  
Alkaline Conditions ◽  
Exchange Membrane ◽  
Excellent Stability

Herein, a novel non-platinum IrNi@PdIr/C exhibits enhanced hydrogen oxidation activity and excellent stability under alkaline conditions.

scholarly journals A novel platinum-based nanocatalyst at a niobia-doped titania support for the hydrogen oxidation reaction

2011 ◽  
Vol 76 (8) ◽  
pp. 1139-1152 ◽  
Author(s):  
Nevenka Elezovic ◽  
Biljana Babic ◽  
Velimir Radmilovic ◽  
Ljiljana Gajic-Krstajic ◽  
Nedeljko Krstajic ◽  
...  
Keyword(s):  
Surface Area ◽  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Pt Nanoparticles ◽  
Active Surface Area ◽  
Real Surface ◽  
Hydrogen Oxidation Reaction ◽  
Rotating Disc ◽  
Doped Titania ◽  
Kinetics Of

The kinetics of the hydrogen oxidation reaction (HOR) was studied at Pt nanoparticles supported on niobia-doped titania (Pt/N-T). The catalyst support, with the composition of 0.05NbO2.5-?-0.995TiO2 (0<?<1), was synthesized by a modified sol-gel procedure and characterized by the BET and X-ray diffraction (XRD) techniques. The specific surface area of the support was found to be 70 m2 g-1. The XRD analysis revealed the presence of the anatase TiO2 phase in the support powder. No peaks indicating the existence of Nb-compounds were detected. Pt/N-T nanocatalyst was synthesized by the borohydride reduction method. Transmission electron microscopy revealed a quite homogenous distribution of the Pt nanoparticles over the support, with a mean particle size of about 3 nm. The electrochemical active surface area of Pt of 42?4 m2 g-1 was determined by the cyclic voltammetry technique. The kinetics of the HOR was investigated by linear sweep voltammetry at a rotating disc electrode in 0.5 mol dm-3 HClO4 solution. The determined value of the Tafel slope of 35 mV dec-1 and an exchange current density of 0.45 mA cm-2 per real surface area of the Pt are in good accordance with those already reported in the literature for the HOR at polycrystalline Pt and Pt nanocatalysts in acid solutions. This new catalyst exhibited better activity for the HOR in comparison with Pt nanocatalyst supported on Vulcan? XC-72R high area carbon.

Improved hydrogen oxidation reaction under alkaline conditions by ruthenium–iridium alloyed nanoparticles

2016 ◽  
Vol 4 (41) ◽  
pp. 15980-15985 ◽  
Author(s):  
J. Ohyama ◽  
D. Kumada ◽  
A. Satsuma
Keyword(s):  
Oxidation Reaction ◽  
Hydrogen Oxidation ◽  
Hydrogen Oxidation Reaction ◽  
Alkaline Conditions ◽  
Nanoparticle Catalyst

Carbon supported Ru–Ir alloyed nanoparticle catalyst (Ru-Ir/C) was prepared. Ru-Ir/C improved hydrogen oxidation reaction activity under alkaline conditions in comparison with Ru/C, Ir/C, and Pt/C.

Sign in / Sign up

Export Citation Format

Share Document