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Recently, carbon nanotubes have been widely used as supporting materials for semiconductor photocatalysts due to their excellent electron and mass transportation. Herein, we prepared a novel SWCNT-decorated Ti3+-B co-doped TiO 2 /BN (STBN) photocatalyst with the presence of single-walled carbon nanotubes (SWCNTs) during the hybridization of BN and TiB 2. The effects of SWCNTs on the structural and photocatalytic properties were investigated. Adding SWCNTs enables excellent multifunctional photocatalytic performances (N 2 fixation, H 2 production, and MO degradation) compared with the TBN synthesized in the previous study. Introducing SWCNTs reduces the transfer resistance and makes the photogenerated carriers transfer more efficiently, thereby improving photocatalytic activity. More defect sites provide extra adsorption sites for reactants and photogenerated electrons, significantly improving the system's photocatalytic activity. The enhanced photocatalytic mechanism of SWCNT-decorated hybrid catalysts was proposed at last. [Display omitted] • SWCNT@Ti3+-B co-doped TiO 2 /BN (STBN) photocatalyst was synthesized. • The effects of SWCNTs on the structure and photocatalytic activities were investigated. • Adding SWCNTs enables excellent multifunctional photocatalytic performances. • Such enhanced photocatalytic mechanism of SWCNT-decorated hybrid catalysts was proposed. [ABSTRACT FROM AUTHOR]

With the flourishing development of advanced wireless technology, the situation of electromagnetic pollution and interference is becoming increasingly severe. The research and development of efficient electromagnetic wave absorption materials is extraordinary beneficial for solving these disgusting issues. Nitrogen (N)-doped carbons have shown great advantages as absorbents, such as lightweight, high surface area, excellent hydrophilicity, unique electronic properties, etc. Herein, we provide a perspective on state-of-art advances and challenges of N-doped carbons based absorbents. The effect of N-doping on the electromagnetic wave (EWs) response are dissected from the N-configurations and concentrations, which are of significant importance in understanding of electromagnetic response. And then we center the regulation of the N-doped carbon in the EWs responses by combing the eye-catching advances in N-doped carbon based EWs absorbing nano-materials from constituents and nanostructures. Finally, the outlook and challenges of N-doped carbons as absorbents for future research are proposed. This perspective combs the electronic structures of N configurations in N-doped carbons, and their electromagnetic responses are related to the N configurations. [Display omitted] • Effect of N-doping on the electrical and dielectric properties of carbons are dissected. • Regulation of N-doped carbon in the EWs responses is combed from constituents and nanostructures. • Bottlenecks and outlook of N-doped carbons as absorbents are proposed. [ABSTRACT FROM AUTHOR]

[Display omitted] • Nitrogen doping optimizes intermediate adsorption on carbon-supported Pd (Pd/N-PC) • Non-electronic Pd-N synergy improves deuterium/hydrogen evolution activity further. • Mass-normalized activity of Pd/N-PC is up to 11 times higher than commercial Pt/C. • Pd/N-PC shows high stability at 100 mA cm−2 in acidic and alkaline electrolytes. • Pd/N-PC achieves unprecedentedly low hydrogen evolution overpotential. In deuterium evolution reaction (DER), the strong D-O bond results in suboptimal performance of traditional Pt-based hydrogen evolution reaction (HER) catalysts, a rarely addressed issue. As a potential replacement of Pt, Pd is usually less active in DER/HER. Herein, we demonstrate superior activity and stability of Pd nanoparticles effected by controlled metal-support interaction with nitrogen-doped porous carbon (N-PC). The Pd/N-PC catalyst exhibited ultralow overpotentials of 40.6 mV (4.1 mV) and 42.5 mV (15.5 mV) at 10 mA cm−2 in 1 M NaOD (NaOH) and 0.5 M D 2 SO 4 (H 2 SO 4), respectively, outperforming commercial Pt/C by up to 11 times in terms of mass-normalized activity. Altered strength of H/D adsorption, large active surface area, and optimized synergistic effects between Pd and nitrogen sites were found responsible for the enhanced activity. This work provides guidance on the development of high-performance Pd-based electrocatalysts and serves as a reference for future study on DER. [ABSTRACT FROM AUTHOR]