Continuous Production of Carbon‐Supported Cubic and Octahedral Platinum‐Based Catalysts Using Conveyor Transport System

Abstract

A conveyor transport system is developed for the continuous production of carbon-supported uniform Pt nanocubes, and Pt Ni nanocubes and octahedra in a single-reaction system under hot carbon monoxide environment. Oleylamine is critical for the high loading and even the dispersion of Pt nanocubes on a carbon support. The metal catalyst shows high performance in electrocatalytic oxidation of methanol.

Direct Semiconductor Laser Writing of Few‐Layer Graphene Polyhedra Networks for Flexible Solid‐State Supercapacitor

“…The small uptake of adsorbent at low relative pressure indicates the presence of low proportion of micropore (<2 nm) and the ratio of the area of micropore (23 m 2 g −1 ) to the area of external pore (236 m 2 g −1 ) equals to 0.1, obtained by t‐plot method . The specific surface area of the sample by the BET method is 256 m 2 g −1 , which is almost the same as the engineered carbon black of “Vulcan XC72” serials . Figure b gives the mode of the pore size distribution of the sample calculated by BJH method with adsorption branch, and the peaks locating at 3–4, 11 nm belong to mesopore range (2–50 nm).…”

“…The high-resolution nitrogen (77.4 K) adsorption/ desorption isotherms (Figure 3a) of the sample should be classified to IUPAC type III. [15] Figure 3b gives the mode of the pore size distribution of the sample calculated by BJH method with adsorption branch, and the peaks locating at 3-4, 11 nm belong to mesopore range (2-50 nm). [14] The specific surface area of the sample by the BET method is 256 m 2 g −1 , which is almost the same as the engineered carbon black of "Vulcan XC72" serials.…”

Architectural Designs and Synthetic Strategies of Advanced Nanocatalysts

“…Besides the assembly of metal NPs and support materials in a batch system (viz., colloidal synthesis), a continuous production of nanocatalysts with Pt or Pt 3 Ni supported on SiO 2 material (or carbon, Al 2 O 3 , etc.) has been reported under hot carbon monoxide environment, where the NPs were formed via gas phase reduction in a scalable preparation manner …”

Facets Matching of Platinum and Ferric Oxide in Highly Efficient Catalyst Design for Low-Temperature CO Oxidation

“…After being loaded to the Fe 2 O 3 support, the Pt precursors underwent programmed annealing in a CO atmosphere to obtain the supported Pt cluster catalysts. The exposed surfaces of the Pt cluster were controlled by the addition of oleylamine (OAm) as the capping agent . Low-magnification transmission electron microscopy (TEM) characterization of the synthesized Pt/Fe 2 O 3 catalysts is shown in Figure S2.…”

“…Herein, we demonstrate the obvious facets matching dependence of Pt/α-Fe 2 O 3 catalysts toward CO oxidation reaction. Pt NPs without well-defined morphology, thereby analyzed as a Wulff structure (denoted as Pt{111} for simplification), and Pt nanocubes (Pt NCs, denoted as Pt{100}) supported by α-Fe 2 O 3 nanosheets (NSs) with exposed surface {001} (denoted as Fe 2 O 3 {001}) and α-Fe 2 O 3 rhombohedra (Rhomb) with exposed surface {104} (denoted as Fe 2 O 3 {104}) are fabricated based on a modified CO-assisted gas-phase synthetic method. − It shows that the four combinations exhibit different catalytic activities following the order of Pt{100}/Fe 2 O 3 {104} > Pt{100}/Fe 2 O 3 {001} > Pt{111}/Fe 2 O 3 {001} > Pt{111}/Fe 2 O 3 {104}. The Pt{100}/Fe 2 O 3 {104} catalyst turns out to be the most active with the lowest temperature around 60 °C to achieve 100% CO conversion efficiency.…”