Hierarchically structured 3D carbon nanotube electrodes for electrocatalytic applications

• Pei Wang,
• Katarzyna Kulp and
• Michael Bron

Beilstein J. Nanotechnol. 2019, 10, 1475–1487, doi:10.3762/bjnano.10.146

• structures demonstrate an exceptionally high poisoning tolerance. Keywords: chemical vapor deposition; CNTs; CO stripping; hierarchically structured electrodes; methanol oxidation; platinum; poisoning tolerance; Introduction Carbon nanotubes (CNTs) have attracted considerable attention since their

• surface. As expected, Pt-GC has a much lower ECSA compared to Pt-CNT/GC or Pt-CNT/CNT/GC, which is associated with the larger Pt nanoparticles (see Supporting Information File 1, Figure S9) resulting from the much lower surface area of GC. CO stripping voltammograms In addition, COad stripping

• baseline determination for the Hupd peaks and thus a relatively large error. In this respect, the results on the surface-specific properties (see below) are related to the ECSA determined by CO stripping, which is believed to be much more reliable due to easier baseline correction. Methanol electro

Shape-selected nanocrystals for in situ spectro-electrochemistry studies on structurally well defined surfaces under controlled electrolyte transport: A combined in situ ATR-FTIR/online DEMS investigation of CO electrooxidation on Pt

• Sylvain Brimaud,
• Zenonas Jusys and
• R. Jürgen Behm

Beilstein J. Nanotechnol. 2014, 5, 735–746, doi:10.3762/bjnano.5.86

• ) positive going scans of CO stripping voltammograms (a–c) and mass spectrometric current of the m/z = 44 signal (CO2 detection) (d–f) for (111)-NC (a,d), (111+100)-NC (b,e) and (100)-NC (c,f). H2SO4 0.5 M, v = 1 mV s−1. Normalized mass spectrometric current (m/z = 44, CO2 detection, red dotted line) and

Design criteria for stable Pt/C fuel cell catalysts

• Josef C. Meier,
• Carolina Galeano,
• Ioannis Katsounaros,
• Jonathon Witte,
• Hans J. Bongard,
• Angel A. Topalov,
• Claudio Baldizzone,
• Stefano Mezzavilla,
• Ferdi Schüth and
• Karl J. J. Mayrhofer

Beilstein J. Nanotechnol. 2014, 5, 44–67, doi:10.3762/bjnano.5.5

• (“Activity measurements”). A typical CO-stripping voltammogram exhibits no current between 0.05 and approximately 0.6 VRHE. The features of hydrogen desorption in the hydrogen underpotential deposition (HUPD) region, which are typical for cyclic voltammograms of platinum, are not present in that case as the

• complete platinum surface is covered with adsorbed carbon monoxide, which suppresses the adsorption of hydrogen or other species. The oxidation of the adsorbed CO to CO2 finally starts in the positively directed scan at potentials around 0.7 VRHE and results in a pronounced CO-stripping peak. Beyond the CO

• VRHE) and the adsorption of hydrogen in the HUPD region (ca. 0.3–0.05 VRHE). The integration of the area under the CO oxidation signal between the CO-stripping voltammogram and the successive voltammogram in CO-free argon atmosphere (background) is a measure of the active surface area. According CO