101
© Springer Nature Switzerland AG 2020
R. Adzic, N. Marinkovic, Platinum Monolayer Electrocatalysts,
https://doi.org/10.1007/978-3-030-49566-4_8
Chapter 8
Catalytic Properties of Pt Monolayer
Electrocatalysts
The concept of Pt monolayer electrocatalysts is described in Sect. 7. These electrocatalysts have a core-shell structure with a monolayer of Pt as the shell supported by
various conductive nanostructures with single or multiple metal components as the
core. This class of electrocatalysts possesses the following unique properties: (1)
ultimately low Pt content, containing only one monolayer amount of Pt; (2) complete
utilization of Pt is possible since all Pt atoms are on the surface and can have electronic and ionic contacts and contact with reactants; (3) tunable activity and stability
from the modification of the structural and electronic properties of Pt ML induced by
the substrate [1]. Based on the composition and structure of the substrates, Pt ML electrocatalysts can be considered belonging to the following categories: Pt ML on (i)
metal, (ii) alloy, (iii) intermetallic compounds, (iv) aerogels, (v) nitrides, (vi) oxides,
(vii) carbides. From studies of the role of the shape of the substrates studies, it has
been determined that, in addition to the traditional zero-dimensional (0-D) nanoparticles and one-dimensional (1-D) nanowires, three-dimensional (3-D) nano-crystals
core-shell cores can also been used as substrates for Pt ML . The unique features of Pt ML
electrocatalysts open various possibilities for designing electrocatalysts with specific
catalytic properties by choosing appropriate substrates.
8.1 Oxygen Reduction Reaction (ORR)
8.1.1 Pt Monolayer on Extended Areas Single Crystals
As an example of the results obtained for a Pt ML deposition on single-crystal electrodes, data for an Rh(111) surface are shown [2]. Figure 7.4 shows the typical
voltammetry curve with two peaks for the underpotential deposition (UPD) of Cu
on an Rh(111) surface. The charge associated with these peaks is 540 μC/cm
2
,
© Springer Nature Switzerland AG 2020
R. Adzic, N. Marinkovic, Platinum Monolayer Electrocatalysts,
https://doi.org/10.1007/978-3-030-49566-4_8
Chapter 8
Catalytic Properties of Pt Monolayer
Electrocatalysts
The concept of Pt monolayer electrocatalysts is described in Sect. 7. These electrocatalysts have a core-shell structure with a monolayer of Pt as the shell supported by
various conductive nanostructures with single or multiple metal components as the
core. This class of electrocatalysts possesses the following unique properties: (1)
ultimately low Pt content, containing only one monolayer amount of Pt; (2) complete
utilization of Pt is possible since all Pt atoms are on the surface and can have electronic and ionic contacts and contact with reactants; (3) tunable activity and stability
from the modification of the structural and electronic properties of Pt ML induced by
the substrate [1]. Based on the composition and structure of the substrates, Pt ML electrocatalysts can be considered belonging to the following categories: Pt ML on (i)
metal, (ii) alloy, (iii) intermetallic compounds, (iv) aerogels, (v) nitrides, (vi) oxides,
(vii) carbides. From studies of the role of the shape of the substrates studies, it has
been determined that, in addition to the traditional zero-dimensional (0-D) nanoparticles and one-dimensional (1-D) nanowires, three-dimensional (3-D) nano-crystals
core-shell cores can also been used as substrates for Pt ML . The unique features of Pt ML
electrocatalysts open various possibilities for designing electrocatalysts with specific
catalytic properties by choosing appropriate substrates.
8.1 Oxygen Reduction Reaction (ORR)
8.1.1 Pt Monolayer on Extended Areas Single Crystals
As an example of the results obtained for a Pt ML deposition on single-crystal electrodes, data for an Rh(111) surface are shown [2]. Figure 7.4 shows the typical
voltammetry curve with two peaks for the underpotential deposition (UPD) of Cu
on an Rh(111) surface. The charge associated with these peaks is 540 μC/cm
2
,