Activity and durability of intermetallic PdZn electrocatalyst for ethanol oxidation reaction

Kien, Nguyen Trung; Hashisake, Kanaru; Chiku, Masanobu; Higuchi, Eiji; Inoue, Hiroshi

doi:10.1007/s11164-022-04780-z

Cited by 4 publications

(4 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…No substantial segregation of Cu on the surface could be distinguished. The strong stability is remarkable, as not all intermetallic structures are always resistant to harsh environments. ,, It is even possible to distinguish the intermetallic phase on the particles tracked during the whole cycle (Figure a–c). Additional STEM images of other particles are provided in the Supporting Information (Figure S11).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Stable Cu–Pt Nanoparticles under Reductive and Oxidative Conditions

et al. 2023

View full text Add to dashboard Cite

We report a synthesis method for highly monodisperse Cu−Pt alloy nanoparticles. Small and large Cu−Pt particles with a Cu/Pt ratio of 1:1 can be obtained through colloidal synthesis at 300 °C. The fresh particles have a Pt-rich surface and a Cu-rich core and can be converted into an intermetallic phase after annealing at 800 °C under H 2 . First, we demonstrated the stability of fresh particles under redox conditions at 400 °C, as the Pt-rich surface prevents substantial oxidation of Cu. Then, a combination of in situ scanning transmission electron microscopy, in situ X-ray absorption spectroscopy, and CO oxidation measurements of the intermetallic CuPt phase before and after redox treatments at 800 °C showed promising activity and stability for CO oxidation. Full oxidation of Cu was prevented after exposure to O 2 at 800 °C. The activity and structure of the particles were only slightly changed after exposure to O 2 at 800 °C and were recovered after re-reduction at 800 °C. Additionally, the intermetallic CuPt phase showed enhanced catalytic properties compared to the fresh particles with a Pt-rich surface or pure Pt particles of the same size. Thus, the incorporation of Pt with Cu does not lead to a rapid deactivation and degradation of the material, as seen with other bimetallic systems. This work provides a synthesis route to control the design of Cu−Pt nanostructures and underlines the promising properties of these alloys (intermetallic and non-intermetallic) for heterogeneous catalysis.

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Stable Cu–Pt Nanoparticles under Reductive and Oxidative Conditions

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The strong stability is remarkable, as not all intermetallic structures are always resistant to harsh environments. 51,52 It is even possible to distinguish the intermetallic phase on the particles tracked during the whole cycle (Figure 8a-c). Additional STEM images of other particles are provided in the supporting information (Figure S11).…”

Section: Methodsmentioning

confidence: 99%

Synthesis and Characterization of Stable Cu-Pt Nanoparticles under Reductive and Oxidative Conditions

Foucher

Yang

Rosen

et al. 2023

Preprint

View full text Add to dashboard Cite

We report a synthesis method for highly monodisperse Cu-Pt alloy nanospheres. Small and large Cu-Pt particles with a Cu:Pt ratio of 1:1 can be obtained through colloidal synthesis at 300 °C. The fresh particles have a Pt-rich surface and a Cu-rich core and can be converted into an intermetallic phase after annealing at 800 °C under H2. First, we demonstrated the stability of fresh particles under redox conditions at 400 °C, as the Pt-rich surface prevents substantial oxidation of Cu. Then, a combination of in situ scanning transmission electron microscopy, in situ X-ray absorption spectroscopy, and CO oxidation measurements of the intermetallic CuPt phase before and after redox treatments at 800 °C showed promising activity and stability for CO oxidation. Full oxidation of Cu was prevented after exposure to O2 at 800 °C. The activity and structure of the particles was only slightly changed after exposure to O2 at 800 °C and were recovered after re-reduction at 800 °C. Additionally, the intermetallic CuPt phase showed enhanced catalytic properties compared to the fresh particles with a Pt-rich surface or pure Pt particles of the same size. Thus, the incorporation of Pt with Cu does not lead to a rapid deactivation and degradation of the material, as seen with other bimetallic systems. This work provides a synthesis route to control the design of Cu-Pt nanostructures and underlines the promising properties of these alloys (intermetallic and non-intermetallic) for heterogeneous catalysis.

show abstract

“…This peak is more prominent for Pt/SnO2/C, indicating oxidation of adsorbed CO on Pt atoms adjacent to SnO2. However, the peak is less pronounced for Pt-Rh/SnO2/C and Pt-Rh/SnO2(commercial)/C, suggesting reduced contact between Pt and SnO2 due to Rh deposition on the exposed Pt surface [28,29]. During CO electro-oxidation, Tien et al [28] investigated various configurations of mixtures containing Pt/C and SnO2 across a range of molar ratios of Pt to SnO2 (3:1, 1:1, and 1:3).…”

Section: Electrochemical Measurementsmentioning

confidence: 98%

“…However, the peak is less pronounced for Pt-Rh/SnO2/C and Pt-Rh/SnO2(commercial)/C, suggesting reduced contact between Pt and SnO2 due to Rh deposition on the exposed Pt surface [28,29]. During CO electro-oxidation, Tien et al [28] investigated various configurations of mixtures containing Pt/C and SnO2 across a range of molar ratios of Pt to SnO2 (3:1, 1:1, and 1:3). They observed a reduction in the pre-peak charge when transitioning from physical mixtures to a configuration where a SnO2 layer is superimposed onto a Pt/C layer.…”

Section: Electrochemical Measurementsmentioning

confidence: 98%

The Effect of SnO2 and Rh on Pt Nanowire Catalysts for Ethanol Oxidation

Valerio Neto,

Almeida,

Eguiluz

et al. 2024

Catal Res

View full text Add to dashboard Cite

In this study, we synthesized Pt-Rh nanowires (NWs) through chemical reduction of metallic precursors using formic acid at room temperature, excluding the use of surfactants, templates, or stabilizing agents. These NWs were supported on two substrates: carbon (Vulcan XC-72R) and carbon modified with tin oxide (SnO2) via the sol-gel method (10 wt.% SnO2). We explored the electroactivity of Pt/SnO2/C, Pt-Rh/C, Pt-Rh/SnO2(commercial)/C (commercial SnO2), and Pt-Rh/SnO2/C NWs toward electrochemical oxidation of ethanol in acidic media using various techniques, including CO-stripping, cyclic voltammetry, derivative voltammetry, chronoamperometry, and steady-state polarization curves. Physical characterization involved X-ray diffraction and transmission electron microscopy. The synthesized NWs exhibit higher ethanol oxidation activity than the commercial Pt/C (Johnson Matthey™) catalyst. Rh atoms are hypothesized to enhance complete ethanol oxidation, while the NW morphology improves ethanol adsorption at the catalyst surface for subsequent oxidation. Additionally, the choice of support material plays a significant role in influencing the catalytic activity. The superior catalytic activity of Pt-Rh/SnO2/C NWs may be attributed to the facile dissociation of the C-C bond, low CO adsorption (electronic effect due to Rh presence), and the bifunctional mechanism facilitated by the oxophilic nature of the SnO2 support.

show abstract

Activity and durability of intermetallic PdZn electrocatalyst for ethanol oxidation reaction

Cited by 4 publications

References 48 publications

Synthesis and Characterization of Stable Cu–Pt Nanoparticles under Reductive and Oxidative Conditions

Synthesis and Characterization of Stable Cu–Pt Nanoparticles under Reductive and Oxidative Conditions

Synthesis and Characterization of Stable Cu-Pt Nanoparticles under Reductive and Oxidative Conditions

The Effect of SnO<sub>2</sub> and Rh on Pt Nanowire Catalysts for Ethanol Oxidation

Contact Info

Product

Resources

About