Ammonia oxidation on electrodeposited Pt–Ir alloys

Mathematical modeling of ammonia electrooxidation kinetics in a Polycrystalline Pt rotating disk electrode

“…Within this context, attempts to understand the ammonia electrooxidation mechanism by means of experimental analysis with different catalysts and support materials have been performed by several researchers [11,12,[14][15][16][17][18][19][20][21]. However, a comprehensive understanding of the reaction (with postulation of a kinetic rate expression considering the intermediates and the transport and surface phenomena) has not been performed.…”

Improved catalytic performance of Pt/TiO2 nanotubes electrode for ammonia oxidation under UV-light illumination

“…Besides, the effect of UV illumination on the electrocatalytic activity of the Pt/TiO 2 for ammonia oxidation has remained unclear. Furthermore, it has been generally accepted that the electrocatalytic activities are strongly dependent on the morphology of the Pt catalysts [16][17][18][19][20][21]. Previous work from our group [40,41] compared the activity of the flower-like Pt particles with spherical Pt particles and found that both the mass activity and specific activity of the flower-like Pt particles are much higher than that of the spherical Pt particles.…”

“…Among various noble metals, platinum (Pt) has been so far recognized as the most effective electrocatalyst for the ammonia oxidation [6,8,14,15]. To improve the electrocatalytic activity and lower the cost of the electrocatalysts, Pt particles are usually supported on an appropriate support such as carbon-based materials [1,16,17], metallic materials [3,18] and metal oxides [19][20][21][22][23]. Among various oxides, TiO 2 has been considered as an attractive material as a support for electrocatalysts due to its low production cost, non-toxicity and long-term chemical stability over a wide range of pH values [24].…”

SnO2-modified Pt electrocatalysts for ammonia–fueled anion exchange membrane fuel cells

“…In particular, PtIr alloys are considered to be promising electrodes due to their good catalytic activity and enhanced stability for ammonia oxidation as determined by several studies [21][22][23][24][25][26]. Endo et al reported that the onset potential for ammonia oxidation on PtIr alloys is reduced by approximately 0.1 V compared to that on monometallic Pt, because Ir participates in ammonia dehydrogenation [22].…”

“…To enhance the electrocatalytic activity of Pt for ammonia oxidation, various bimetallic catalysts have been investigated, e.g., PtIr, PtRu, PtPd, PtCu, and PtNi [11,[21][22][23][24][25][26]. In particular, PtIr alloys are considered to be promising electrodes due to their good catalytic activity and enhanced stability for ammonia oxidation as determined by several studies [21][22][23][24][25][26].…”