Abstract As electron transfer to CO 2 is generally considered be the critical step during activation of , it important develop approaches engineer electronic properties catalysts improve their performance in electrochemical reduction. Herein, we developed an efficient strategy facilitate by introducing oxygen vacancies into electrocatalysts with electronic‐rich surface. ZnO nanosheets rich exhibited a current density −16.1 mA cm −2 Faradaic efficiency 83 % for production. Based on functional...

Efforts have been devoted to achieving a highly efficient artificial synthesis of ammonia (NH3 ). Reported herein is novel Fe-MoS2 catalyst with Fe atomically dispersed onto MoS2 nanosheets, imitating natural nitrogenase, boost N2 electroreduction into NH3 at room temperature. The nanosheets exhibited faradic efficiency 18.8 % yield rate 8.63 μg mgcat.-1 h-1 for -0.3 V versus the reversible hydrogen electrode. mechanism study revealed that was promoted and competing evolution reaction...

Hollow frame structures are of special interest in the realm catalysis since they hold only ridges and hollow interiors, enabling accessibility active sites to most extent. Herein, we prepared Pd–Pt composed double-shell cubes linked by body diagonals as an efficient catalyst toward oxygen reduction reaction (ORR), inspired 4D analogue a cube, denoted tesseract. The etching process involves selective removal Pd atoms subsequent rearrangement remaining Pt atoms. successful preparation...

Mastery over the structure of materials at nanoscale can effectively tailor and control their catalytic properties, enabling enhancement in both activity durability. We report a size-controlled synthesis novel Pt-Cu hierarchical trigonal bipyramid nanoframes (HTBNFs). The obtained nanocrystals looked like on whole, composed similar ordered frame structural units. By varying amount KI involved reaction, HTBNFs with variable sizes from 110 to 250 nm could be obtained. In addition, preserved...

Abstract As electron transfer to CO 2 is generally considered be the critical step during activation of , it important develop approaches engineer electronic properties catalysts improve their performance in electrochemical reduction. Herein, we developed an efficient strategy facilitate by introducing oxygen vacancies into electrocatalysts with electronic‐rich surface. ZnO nanosheets rich exhibited a current density −16.1 mA cm −2 Faradaic efficiency 83 % for production. Based on functional...

Abstract Converting carbon dioxide (CO 2 ) into liquid fuels and synthesis gas is a world-wide priority. But there no experimental information on the initial atomic level events for CO electroreduction metal catalysts to provide basis developing improved catalysts. Here we combine ambient pressure X-ray photoelectron spectroscopy with quantum mechanics examine processes as Ag exposed both alone in presence of H O at 298 K. We find that reacts surface form chemisorbed species (O = δ− )....

In recent years, semiconductor-based surface-enhanced Raman scattering (SERS) substrates have received considerable attention and led to a forefront in the SERS field. However, lack of electromagnetic (EM) enhancement contributions highly precludes development semiconductive-substrate-based SERS. this study, Ga-doped ZnO nanoparticles (NPs) were fabricated employed as novel based on EM contribution surface plasmon resonance (SPR). The obtained NPs exhibited obvious SPR absorptions visible...

Planar nanocrystals with multiple branches exhibit unique localized surface plasmon resonance properties and great promise in optical applications. Here, we report an aqueous synthesis of Pd@AuCu core–shell planar tetrapods through preferential overgrowth on Pd cubic seeds. The large lattice mismatch between the core AuCu shell is key to induce formation under sluggish reduction kinetics. Meanwhile, capping effect cetyltrimethylammonium chloride {100} facets cubes aspect ratio 1.2 can...

By studying the nanocatalysis of individual Pd nanoparticles (Pd NPs) in two shapes (cube with (100) facet and octahedron (111) facet) single-turnover resolution, facet-dependent activities dynamics were apparently observed. The results indicate that octahedrons possess higher intrinsic catalytic activity per site than nanocubes. Within a competitive Langmuir–Hinshelwood mechanism, are derived at single-particle level, adsorption behaviors substrate molecules on Pd(111) Pd(100) revealed...

The interfaces of metal–dye molecule–semiconductor sandwich structure are very important in the investigation dye-sensitized solar cells (DSSCs) where metals used to enhance absorption. In this work, we first designed and synthesized Ag/N719 Ag/N719/TiO2 systems investigate chemical binding type at Ag/N719/TiO2. results Raman spectra under laser excitations 532, 633, 785 nm clarified that SCN groups adsorbed on Ag surface via S terminal TiO2 layer possibly bound ester linkage (—O—C═O) COOH...

Using ambient pressure X-ray photoelectron spectroscopy (APXPS) and mass spectrometry (MS) while varying the temperature, we were able to directly understand how sequence of exposing reactant gases, CO2 H2, influenced surface species reverse water–gas shift reaction product formation on Ni(100). When first dosing at room temperature (RT), Ni(100) shows a significant amount oxide due spontaneously dissociating into CO O this is nearly unchanged upon introducing H2. However, when H2 dosed...

Abstract Mastery over the structure of materials at nanoscale can effectively tailor and control their catalytic properties, enabling enhancement in both activity durability. We report a size‐controlled synthesis novel Pt–Cu hierarchical trigonal bipyramid nanoframes (HTBNFs). The obtained nanocrystals looked like on whole, composed similar ordered frame structural units. By varying amount KI involved reaction, HTBNFs with variable sizes from 110 to 250 nm could be obtained. In addition,...

Because they deliver outstanding energy density, next-generation lithium metal batteries (LMBs) are essential to the advancement of both electric mobility and portable electronic devices. However, high reactivity metallic surfaces leads low electrochemical performance many secondary batteries. Besides, Li deposition is not uniform, which has been attributed ionic conductivity anode surface. In particular, exposure CO2 gas considered detrimental due formation carbonate on solid electrolyte...

In our previous study, we proposed a label-free enantioselective discrimination methodology for chiral alcohols based on surface-enhanced Raman scattering (SERS) spectroscopy. This method does not use either reagents or circularly polarized light (chiral light). the present series of SERS experiments were carried out with an achiral probe molecule, p-aminobenzenethiol (PATP), as selector molecule to develop this further and explore possible mechanism discrimination. The relative intensities...

Bimetallic electrocatalysts provide a promising strategy for improving performance, especially in the enhancement of selectivity CO2 reduction reactions. However, first step activation on bimetallic materials remains obscure. Considering silver-copper (AgCu) as an example, we coupled ambient pressure X-ray photoelectron spectroscopy (APXPS) and quantum mechanics (QM) to examine adsorption AgCu exposed with without H2O at 298 K. The interplay between adsorbed species surface alloy composition...

Abstract Efforts have been devoted to achieving a highly efficient artificial synthesis of ammonia (NH 3 ). Reported herein is novel Fe‐MoS 2 catalyst with Fe atomically dispersed onto MoS nanosheets, imitating natural nitrogenase, boost N electroreduction into NH at room temperature. The nanosheets exhibited faradic efficiency 18.8 % yield rate 8.63 μg mg cat. −1 h for −0.3 V versus the reversible hydrogen electrode. mechanism study revealed that was promoted and competing evolution...

A nanoscale metal-molecule-semiconductor assembly (Ag/4-mercaptophenol/TiO2) has been fabricated over Au nanoparticle (NP) films as a model to study the interfacial charge transfer (CT) effects involved in Ag/MPH/TiO2. Due interaction between NPs and Ag NPs, some distinct differences occur SERS spectra. We also measured of Ag/MPH (4-mercaptophenol), Ag/MPH/TiO2, Au/Ag/MPH/TiO2 assemblies at excitation wavelengths 477, 514, 532, 633, 785 nm. found that changes CT process, caused by...

A SERRS-based assay for thyrotropin-releasing hormone quantification coupled with the azo reaction was proposed simplicity, rapidness, selectivity and ultrahigh sensitivity.