One‐Pot Synthesis of Yolk–Shell Materials with Single, Binary, Ternary, Quaternary, and Quinary Systems

Abstract

A facile, one-pot method of systematically synthesizing yolk-shell materials with complex compositions is proposed. The spray pyrolysis process for obtaining yolk-shell materials is advantageous because it is highly efficient, allows high throughput, comprises a single-step reaction, and is a continuous process that yields homogeneous composition and enables facile control of the mean size.

Highly Active and Stable Pt-Loaded Ce0.75Zr0.25O2 Yolk–Shell Catalyst for Water–Gas Shift Reaction

“…The spray pyrolysis system applied in this study is shown in Figure S8. 22,23 The reactor temperature during the spray pyrolysis process was fixed at 800 °C. …”

Electrochemical Properties of Yolk–Shell‐Structured CuO–Fe2O3 Powders with Various Cu/Fe Molar Ratios Prepared by One‐Pot Spray Pyrolysis

“…Combustion, contraction, and recombustion processes occurred in a step-by-step manner as the CuO-Fe 2 O 3 -carbon composite intermediate progressed through the reactor, finally producing yolk-shell-structured CuO-Fe 2 O 3 powders irrespective of compositions. [22][23][24] Heat evolved from the combustion of carbon resulted in the crystalline CuO-Fe 2 O 3 powders with uniform composition. The compositions of the yolkshell CuO-Fe 2 O 3 powders were analyzed by inductively coupled plasma-optical emission spectrometry (ICP-OES, Table S1, the Supporting Information).…”

“…[18][19][20][21][22][23][24][25][26][27] Recently, a simple spray pyrolysis process was successfully applied to the preparation of yolk-shell-structured powders. [22][23][24] Using this one-pot spray pyrolysis process, materials with single, binary, ternary, quaternary, and quinary yolkshell structures were successfully produced under the same preparation conditions. [24] The electrochemical properties of the yolk-shell-structured materials with single and binary metal oxides prepared by spray pyrolysis were mainly investigated.…”

Synthesis of Uniquely Structured Yolk–Shell Metal Oxide Microspheres Filled with Nitrogen‐Doped Graphitic Carbon with Excellent Li–Ion Storage Performance

“…In recent years, spray pyrolysis, which is one of the scalable gas‐phase reaction methods, has been successfully applied to the large‐scale production of yolk–shell‐structured materials of various compositions. In spray pyrolysis, a repeated combustion and contraction process of a metal oxide‐carbon composite, which forms as an intermediate product, leads to the formation of carbon‐free metal oxide microspheres with a yolk–shell structure . The multishelled powders with carbon interlayer have been prepared by multistep liquid solution processes as intermediate product to synthesize the metal oxide yolk–shell powders .…”