Ultrathin Hollow Co/N/C Spheres from Hyper-Crosslinked Polymers by a New Universal Strategy with Boosted ORR Efficiency.

Porous carbon materials with hollow structure, on account of the extraordinary morphology, reveal fascinating prospects in lithium-ion batteries, electrocatalysis, etc. However, collapse in ultrathin carbon spheres due to insufficient rigidity in such thin materials obstructs further enhanced capability. Based on hyper-crosslinked polymers (HCPs) with sufficient pore structure and rigid framework, a new bottom-up strategy is proposed to construct SiO @HCPs directly from aromatic monomers.

Selective photocatalytic CO reduction in aerobic environment by microporous Pd-porphyrin-based polymers coated hollow TiO.

Direct photocatalytic CO reduction from primary sources, such as flue gas and air, into fuels, is highly desired, but the thermodynamically favored O reduction almost completely impedes this process. Herein, we report on the efficacy of a composite photocatalyst prepared by hyper-crosslinking porphyrin-based polymers on hollow TiO surface and subsequent coordinating with Pd(II). Such composite exhibits high resistance against O inhibition, leading to 12% conversion yield of CO from air after 2-h UV-visible light irradiation.

Grafting Hypercrosslinked Polymers on TiO Surface for Anchoring Ultrafine Pd Nanoparticles: Dramatically Enhanced Efficiency and Selectivity toward Photocatalytic Reduction of CO to CH.

Metal deposition with photocatalyst is a promising way to surmount the restriction of fast e /h recombination to improve the photocatalytic performance. However, the improvement remains limited by the existing strategies adopted for depositing metal particles due to the serious aggregation and large unconnected area on photocatalyst surface. Here, a strategy is proposed by directly grafting hypercrosslinked polymers (HCPs) on TiO surface to construct Pd-HCPs-TiO composite with uniform dispersion of ultrafine Pd nanoparticles on HCPs surface.