Yuyi Wei,Dandan Liang,Hongyang Zhou,Shoujie Huang,Weiwei Zhang,Jin Gu,Chuanshuang Hu,Xiuyi Lin
Wood is a promising substrate to decorate conductive material for preparing sustainable composites with electromagnetic interference (EMI) shielding function. Understanding the influences of the assembly manner of conductive materials on the EMI shielding property is essential to develop a facile fabrication method. Herein, the assembly manner of the MXene on wood is adjusted by applying three coating methods, i.e., vacuum-assisted immersion, spray coating, and brush coating. The surface morphologies , interaction between wood and MXene, electrical properties, and EMI shielding effectiveness (SE) of MXene-decorated wood (M/wood) composites were studied systematically. The results show that brush coating provides a flat and laminated MXene layer, hence an efficient conductive network can be constructed with a small loading of MXene. Ultimately, the M/wood composite prepared by brush coating displays an EMI SE of 40.5 dB at 8.2 ∼ 12.4 GHz with a MXene loading of 1.41 mg/cm 2 . Moreover, M/wood composites demonstrated excellent anti-mold function thanks to the reducing activity and fluorine-containing groups of MXene.
As a clean energy carrier, hydrogen necessitates efficient production via cost-effective, highly active non-noble metal electrocatalysts. Herein, we demonstrate a Zn-doped CoP heterostructure catalyst anchored on MXene-engineered nickel foam (MXene@ZnCoP/NF) through synergistic substrate engineering and compositional modulation. This design achieves exceptional alkaline hydrogen evolution reaction (HER) activity and superior overall water splitting efficiency. In 1.0 M KOH electrolyte, the MXene@ZnCoP/NF heterostructure exhibits exceptional HER performance, achieving a low overpotential of 15 mV at 10 mA cm −2 , 64 mV at 50 mA cm −2 , 214 mV at 500 mA cm −2 , and a Tafel slope of 86.0 mV dec −1 , indicative of rapid reaction kinetics. Furthermore, the catalyst demonstrates industrial-grade durability, maintaining stable operation for 65 h at 500 mA cm −2 without significant degradation. When integrated into a full-cell electrolyzer with RuO 2 /NF as the anode (RuO 2 /NF ||MXene@ZnCoP/NF), the system requires only 1.53 V to deliver a current density of 10 mA cm −2 , surpassing the performance of the noble metal system Pt-C/NF||RuO 2 /NF (1.61 V). This highlights its potential as a cost-effective alternative to noble metal-based electrocatalysts for scalable hydrogen production. The enhanced catalytic performance can be primarily attributed to the synergistic interplay of three key factors: the superior conductivity provided by MXene-engineered NF substrates, the Zn doping-induced crystalline-to-amorphous phase reconstruction, and the morphological transformation from micrometer-scale architectures to nanoscale structures. This study proposes an innovative “substrate–structure–composition” synergistic strategy that establishes a new paradigm for designing highly efficient non-noble metal HER electrocatalysts, thereby propelling the scalable industrial implementation of electrocatalytic water splitting for hydrogen production. Graphical abstract
危险品化学品经营许可证（带存储）