Boosting electrocatalytic performance via electronic structure regulation for acidic oxygen evolution.

High-purity hydrogen produced by water electrolysis has become a sustainable energy carrier. Due to the corrosive environments and strong oxidizing working conditions, the main challenge faced by acidic water oxidation is the decrease in the activity and stability of anodic electrocatalysts. To address this issue, efficient strategies have been developed to design electrocatalysts toward acidic OER with excellent intrinsic performance.

Boosting Alkaline Seawater Oxidation of CoFe-layered Double Hydroxide Nanosheet Array by Cr Doping.

The pursuit of stable and efficient electrocatalysts toward seawater oxidation is of great interest, yet it poses considerable challenges. Herein, the utilization of Cr-doped CoFe-layered double hydroxide nanosheet array is reported on nickel-foam (Cr-CoFe-LDH/NF) as an efficient electrocatalyst for oxygen evolution reaction in alkaline seawater. The Cr-CoFe-LDH/NF catalyst can achieve current densities of 500 and 1000 mA cm  with remarkably low overpotentials of only 334 and 369 mV, respectively.

FeO nanoparticle-decorated 3D pinewood-derived carbon for high-efficiency electrochemical nitrate reduction to ammonia.

Electrochemical nitrate (NO) reduction is a sustainable pathway for ambient ammonia (NH) synthesis while eliminating NO pollutants in water. However, the NO reduction reaction (NORR) involves a complicated eight-electron transfer process, which needs highly selective and efficient electrocatalysts. This work describes the synthesis of FeO nanoparticle-decorated 3D pinewood-derived carbon (FeO/PC) as a high-efficiency catalyst for the electroreduction of NO to NH at ambient reaction conditions.

3D cauliflower-like Ni foam: a high-efficiency electrocatalyst for ammonia production nitrite reduction.

A 3D cauliflower-like Ni foam on titanium plate (Ni foam/TP) shows high electrocatalytic performance for ambient ammonia (NH) synthesis nitrite (NO) reduction. In 0.1 M phosphate-buffered saline solution with 0.

High-Performance Electrocatalytic Reduction of Nitrite to Ammonia under Ambient Conditions on a FeP@TiO Nanoribbon Array.

Electrochemical nitrite (NO) reduction is recognized as a promising strategy for synthesizing valuable ammonia (NH) and degrading NO pollutants in wastewater. The six-electron process for the NO reduction reaction is complex and necessitates a highly selective and stable electrocatalyst for efficient conversion of NO to NH. Herein, a FeP nanoparticle-decorated TiO nanoribbon array on a titanium plate (FeP@TiO/TP) is proposed as an efficient catalyst for NH production under ambient conditions.

Sn-based electrocatalysts for electrochemical CO reduction.

Electrochemical CO reduction into value-added chemicals represents an attractive and promising approach to capitalize on the abundant CO present in the atmosphere. This reaction, however, is hampered by low energy efficiency and selectivity owing to competition from hydrogen evolution reaction and multiple-electron transfer processes. Therefore, there is a pressing need to develop efficient yet cost-effective electrocatalysts to facilitate practical applications.

High-Efficiency Electroreduction of Nitrite to Ammonia on Ni Nanoparticles Strutted 3D Honeycomb-Like Porous Carbon Framework.

Electroreduction of nitrite (NO ) to ammonia (NH ) provides a sustainable approach to yield NH , whilst eliminating NO contaminants. In this study, Ni nanoparticles strutted 3D honeycomb-like porous carbon framework (Ni@HPCF) is fabricated as a high-efficiency electrocatalyst for selective reduction of NO to NH . In 0.

Ni nanoparticle-decorated biomass carbon for efficient electrocatalytic nitrite reduction to ammonia.

Electrocatalytic nitrite (NO) reduction to ammonia (NH) can not only synthesize value-added NH, but also remove NO pollutants from the environment. However, the low efficiency of NO-to-NH conversion hinders its applications. Here, Ni nanoparticle-decorated juncus-derived biomass carbon prepared at 800 °C (Ni@JBC-800) serves as an efficient catalyst for NH synthesis by selective electroreduction of NO.

High-Performance Electrochemical Nitrate Reduction to Ammonia under Ambient Conditions Using a FeOOH Nanorod Catalyst.

Electrocatalytic nitrate reduction is promising as an environmentally friendly process to produce high value-added ammonia with simultaneous removal of nitrate, a widespread nitrogen pollutant, for water treatment; however, efficient electrocatalysts with high selectivity are required for ammonia formation. In this work, FeOOH nanorod with intrinsic oxygen vacancy supported on carbon paper (FeOOH/CP) is proposed as a high-performance electrocatalyst for converting nitrate to ammonia at room temperature. When operated in a 0.

Recent advances in MoS-based materials for electrocatalysis.

The increasing energy demand and related environmental issues have drawn great attention worldwide, thus necessitating the development of sustainable technologies to preserve the ecosystems for future generations. Electrocatalysts for energy-conversion reactions such as the hydrogen evolution reaction (HER), nitrogen reduction reaction (NRR), and carbon dioxide reduction reaction (CORR) are at the heart of these renewable energy technologies, but they suffer from sluggish kinetics due to the multistep electron and mass transfer. State-of-the-art catalysts are thus highly desired to boost the conversion efficiencies, which are still inadequate.

High-performance NH production NO electroreduction over a NiO nanosheet array.

Electrocatalytic NO reduction controls NO emission and produces NH under ambient conditions. Herein, a NiO nanosheet array on titanium mesh is proposed as a highly active and selective electrocatalyst for NO reduction, attaining a faradaic efficiency of up to 90% with a NH yield of 2130 μg h cm. Its aqueous Zn-NO battery can generate electricity with a power density of 0.

A Cr-FeOOH@Ni-P/NF binder-free electrode as an excellent oxygen evolution reaction electrocatalyst.

Refining the size of nanoparticles to exhibit larger specific surface areas and expose much more active sites is of great significance for enhancing the oxygen evolution reaction (OER) activity of the electrocatalyst, but still a tremendous challenge. Herein, a Cr-FeOOH@NiP-NiP/NF (Cr-FeOOH@Ni-P/NF) catalyst was constructed by electrodepositing a layer of CrFe oxyhydroxides on the self-grown Ni-P nanoparticles, which exhibits ultrafine nanoparticles and thus superexcellent electrocatalytic OER performance. The final catalyst affords ultra-low overpotentials of 144 mV and 210 mV to achieve current densities of 10 and 50 mA cm, respectively.

Self-supported NiS@NiP/MoS heterostructures on nickel foam for an outstanding oxygen evolution reaction and efficient overall water splitting.

Hydrogen production by electrocatalytic water splitting is a pollution-free, energy-saving, and efficient method. The low efficiency of hydrogen production, high overpotentials and expensive noble-metal catalysts have limited the development of hydrogen production from electrocatalytic water splitting. Therefore, the exploration of bifunctional electrocatalysts for water overall splitting to produce hydrogen is of profound significance.

Greatly Facilitated Two-Electron Electroreduction of Oxygen into Hydrogen Peroxide over TiO by Mn Doping.

Ambient electrochemical oxygen reduction into valuable hydrogen peroxide (HO) via a selective two-electron (2e) pathway is regarded as a sustainable alternative to the industrial anthraquinone process, but it requires advanced electrocatalysts with high activity and selectivity. In this study, we report that Mn-doped TiO behaves as an efficient electrocatalyst toward highly selective HO synthesis. This catalyst exhibits markedly enhanced 2e oxygen reduction reaction performance with a low onset potential of 0.

High-Performance Electrochemical NO Reduction into NH by MoS Nanosheet.

Electrochemical reduction of NO not only offers an attractive alternative to the Haber-Bosch process for ambient NH production but mitigates the human-caused unbalance of nitrogen cycle. Herein, we report that MoS nanosheet on graphite felt (MoS /GF) acts as an efficient and robust 3D electrocatalyst for NO-to-NH conversion. In acidic electrolyte, such MoS /GF attains a maximal Faradaic efficiency of 76.

NiP nanosheet array for high-efficiency electrohydrogenation of nitrite to ammonia at ambient conditions.

Ammonia (NH) plays an important role in agriculture and industry. The industry-scale production mainly depends on the Haber-Bosch process suffering from issues of environment pollution and energy consumption. Electrochemical reduction can degrade nitrite (NO) pollutants in the environment and convert it into more valuable NH.

High-efficiency nitrate electroreduction to ammonia on electrodeposited cobalt-phosphorus alloy film.

Electrocatalytic eight-electron nitrate (NO) reduction is a sustainable strategy to degrade NO and convert it into high value-added ammonia (NH) but needs efficient catalysts with high activity and selectivity. Our study shows the use of Ti plate supported cobalt-phosphorus alloy film (Co-P/TP) as a highly active and selective electrocatalyst for ambient NO-to-NH conversion. In 0.

TiO Nanoparticles with Ti Sites toward Efficient NH Electrosynthesis under Ambient Conditions.

Electrocatalytic nitrogen reduction reaction (NRR) enabled by introducing Ti defect sites into TiO through a doping strategy has recently attracted widespread attention. However, the amount of Ti ions is limited due to the low concentration of dopants. Herein, we propose TiO nanoparticles as a pure Ti system that performs efficiently toward NH electrosynthesis under ambient conditions.

Monodisperse Cu Cluster-Loaded Defective ZrO Nanofibers for Ambient N Fixation to NH.

Electrocatalytic nitrogen reduction to ammonia has attracted increasing attention as it is more energy-saving and eco-friendly. For this endeavor, the development of high-efficiency electrocatalysts with excellent selectivity and stability is indispensable to break up the stable covalent triple bond in nitrogen. In this study, we report monodisperse Cu clusters loaded on defective ZrO nanofibers for nitrogen reduction under mild conditions.

Correction: Hexagonal boron nitride nanosheet as an effective nanoquencher for the fluorescence detection of microRNA.

Correction for 'Hexagonal boron nitride nanosheet as an effective nanoquencher for the fluorescence detection of microRNA' by Xinyi Li et al., Chem. Commun.

NiFe Layered-Double-Hydroxide Nanosheet Arrays on Graphite Felt: A 3D Electrocatalyst for Highly Efficient Water Oxidation in Alkaline Media.

It is of great importance to rationally design and develop earth-abundant nanocatalysts for high-efficiency water electrolysis. Herein, NiFe layered double hydroxide was in situ grown hydrothermally on a 3D graphite felt (NiFe LDH/GF) as a high-efficiency catalyst in facilitating the oxygen evolution reaction (OER). In 1.

Hexagonal boron nitride nanosheet as an effective nanoquencher for the fluorescence detection of microRNA.

Two-dimensional (2D) hexagonal boron nitride nanosheet (h-BNNS) is proposed as an effective nanoquencher for fluorescence detection of biocompatible microRNA. Compared with bulk hexagonal boron nitride (h-BN), the exfoliated ultrathin nanosheet has a narrow band gap and increased conductivity, thus enabling fast electron transfer with this electron acceptor for more effective fluorescence detection of microRNA. Remarkably, using the nanoprobe consisting of h-BNNS and FAM dye-labeled ssDNA, a low detection limit of 2.

An amorphous WC thin film enabled high-efficiency N reduction electrocatalysis under ambient conditions.

Ambient electrochemical N2 reduction offers a promising alternative to the energy-intensive Haber-Bosch process towards renewable NH3 synthesis in aqueous media but needs efficient electrocatalysts to enable the N2 reduction reaction (NRR). Herein, we propose that an amorphous WC thin film magnetron sputtered onto a graphite foil behaves as a superb NRR electrocatalyst for ambient NH3 production with excellent selectivity. In 0.

Reduced graphene oxide supported ZIF-67 derived CoP enables high-performance potassium ion storage.

Potassium-ion batteries (PIBs) are currently recognized as an emerging battery technology because of the rich resources and low cost of potassium. Nevertheless, investigations on exploiting suitable anode materials to meet stable potassium-ions storage remain to be a problem owing to the big radius size of potassium-ions. Herein, we designed N-doped carbon restricted CoP polyhedra embedded into reduced graphene oxide (rGO) sheet (CoP/NC@rGO) through coupling the function of ZIF-67 and rGO.

Enhanced Electrochemical HO Production via Two-Electron Oxygen Reduction Enabled by Surface-Derived Amorphous Oxygen-Deficient TiO.

The electrochemical oxygen reduction reaction (ORR) is regarded as an attractive alternative to the anthraquinone process for sustainable and on-site hydrogen peroxide (HO) production. It is however hindered by low selectivity due to strong competition from the four-electron ORR and needs efficient catalysts to drive the 2e ORR. Here, an acid oxidation strategy is proposed as an effective strategy to boost the 2e ORR activity of metallic TiC via in-site generation of a surface amorphous oxygen-deficient TiO layer.