Hollow inorganic materials are of great interest, in part because of their diverse applications for drug delivery, catalysis, photonic crystals, etc.1 Various preparation methods have been developed to fabricate hollow inorganic materials2,3 and even hollow single crystals;4 most commonly these synthetic methods exploit the use of silica nanospheres as a sacrificial template material. While sil...

A unified analysis is presented for the elastic response of a pressurized cylindrically anisotropic hollow disk under assumed conditions of plane stress, or a hollow cylinder under plane strain conditions, and a spherically anisotropic hollow sphere, made of material which is nonuniform in the radial direction according to the power law relationship. The solution for a cylinder under generalize...

The development of active and durable proton exchange membrane fuel cell catalysts with high loading (ca. 40%) is critical for the commercialization hydrogen cells. Herein we report on synthesis a novel Pt/C catalyst using bowl-like broken hollow carbon sphere (and N-doped sphere) support (carbon shell thickness ~ 4.6 nm). Highly dispersed Pt nanoparticles (dPt 4 nm) were deposited both support...

Back cover image: Carbon-based composite electrocatalysts doped with transition metals and heteroatoms are expected to replace noble metal-based catalysts as high-efficiency for OER ORR. In the article number 10.1002/cey2.317, Zhang et al. prepare an ultralong N,S co-doped carbon nano-hollow-sphere chain encapsulated Co nanoparticles, analyze its growth mechanism catalytic activity ORR/OER, pro...

This study demonstrates magnetism of mesoscopic hollow ceria spheres (H─CeO2) with different defect distribution characteristics. The content and micro-scale are controlled by varying the reaction HNO3 annealing process. obtained divided into three groups according to surface structure, shell. Group I is characterized rough sphere large clusters. II has relatively continuous defective layers re...