Exploring low-cost and high-activity cocatalysts cooperated with semiconductors is a prerequisite to advance cost-efficient photocatalytic water splitting. Herein, nickel nanoparticles (NNPs) loaded on graphitic carbon nitride (CN) as unique non-noble metal cocatalysts with electric and thermal excitation upon surface plasmon for photocatalytic hydrogen (H 2 ) evolution reaction (HER) are designed. The plasmonic NNPs not only endow highly active sites, steering hot electron extraction from excited CN toward HER against charge recombination, but also act as full-spectrum light-harvesting antennas enabling plasmon heating for kinetic acceleration. As a result, the optimized CN/NNP hybrid exhibits a significant increase in the H 2 -evolution rate up to 13.23 mmol g À1 h À1 with temperature up to 73 C within 2 h, which far surpasses bare CN and even outperforms CN/Pt hybrid. This work describes the capacity of plasmonic cocatalysts to convert the supplementary photon flux into numerous stimuli, which provides new inspirations for designing photocatalytic systems for solar energy conversion.

Solar Hydrogen Evolution In article number http://doi.wiley.com/10.1002/solr.202000094, Xiaoyong Xu, Jingguo Hu, Yong Zhou, and co‐workers introduce plasmon‐mediated electric and thermal stimuli into photocatalysis. Nickel nanoparticles function as plasmonic cocatalysts anchored on graphitic carbon nitride nanosheets to expand solar utilization over the NIR region for photocatalytic hydrogen evolution. Plasmon amplifies electric fields, and thermal relaxation generates heat, leading to positive effects on light absorption, electron transfer, and surface catalysis for solar‐to‐hydrogen conversion.

We theoretically study the plasmonic coupling between magnetic plasmon resonances (MPRs) and propagating surface plasmon polaritons (SPPs) in a three-dimensional (3D) metamaterial consisting of vertical Au split-ring resonators (VSRRs) array on Au substrate. By placing the VSRRs directly onto the Au substrate to remove the dielectric substrates effect, the interaction between MPRs of VSRRs and the SPP mode on the Au substrate can generate an ultranarrow-band hybrid mode with full width at half maximum (FWHM) of 2.2 nm and significantly enhanced magnetic fields, compared to that of VSRRs on dielectric substrates. Owing to the strong coupling, an anti-crossing effect similar to Rabi splitting in atomic physics is also obtained. Our proposed 3D metamaterial on a metal substrate shows high sensitivity (S = 830 nm/RIU) and figure of merit (FOM = 377), which could pave way for the label-free biomedical sensing.

(8 of 9)www.advmatinterfaces.de (up to 11.5%). In addition, the all-fiber mode-locked lasers with picosecond (≈3.7 ps) pulse duration and high output power (>10 mW) have been successfully achieved at the optical communication wavelength of 1.5 µm when first using the GTAs@OFT samples as SAs. What is worth noting is that other well-ordered nanostructures can also be rapidly and economically mass-produced onto the OFTs by combining our modified self-assembly NLT with the standard etching technology (e.g., plasma etching), [41,44] which paves the way toward industrial production of the "all-fiber devices" in communications, bio-sensing, and bio-imaging.

We theoretically demonstrate an ultranarrow perfect light absorption (PIA) of a 3D metamaterial due to the strong coupling between the magnetic plasmon of the Au vertical split-ring resonator (VSRR) and the surface plasmon polariton propagating above the Au film. Through lifting the VSRRs above the metallic film to decrease the dielectric substrate effect, the linewidth of 1.9 nm of the PIA is obtained. Our proposed 3D metamaterial shows the high sensitivity (S = 711 nm/RIU, S* = 13/RIU) and figure of merit (FoM =374, FoM* =1.3×105), which could be used for optical gas sensing in visible frequency range.