The development of nonprecious-metal-based electrocatalysts with high oxygen reduction reaction (ORR) activity, low cost, and good durability in both alkaline acidic media is very important for application full cells. Herein, we developed a facile economical strategy to obtain porous core–shell Fe3C embedded nitrogen-doped carbon nanofibers (Fe3C@NCNF-X, where X denotes pyrolysis temperature) by electrospinning polyvinylidene fluoride (PVDF) FeCl3 mixture, chemical vapor phase polymerization...

Copper (Cu) is the only known material that can efficiently electrocatalyze CO2 to value-added multicarbon products. Owing instability of Cuδ+ state and microscopic structure in reactions, Cu catalysts are still facing big challenges with low selectivity poor durability, particularly at high current densities. Herein, we report a rational one-step surface coordination approach for synthesis dendrites an ultrastable hydrophobicity (Cu CF), even after exposure air over 6 months. As result, CF...

The electrochemical reduction reaction of carbon dioxide (CO2RR) to the desired feedstocks with a high faradaic efficiency (FE) and stability at current density is great importance but challenging owing its poor competition hydrogen evolution (HER). Guided by theoretical calculations, herein, series novel metalloporphyrin-linked mercurated graphynes (Hg-MTPP) were designed as electrocatalysts for CO2RR, since graphyne blocks induce HER overpotential. Notably, Hg-CoTPP was synthesized...

Electroreduction of CO2 in highly acidic environments holds promise for enhancing utilization efficiency. Due to the HER interference and structural instability, however, challenges improving selectivity stability toward multicarbon (C2+) products remain. In this study, we proposed an "armor protection" strategy involving deposition ultrathin, hydrophobic SiO2 onto Cu surface (Cu/SiO2) through a simple one-step hydrolysis. Our results confirmed effective inhibition by layer, leading high...

Abstract The electrochemical CO 2 reduction reaction (CO RR) to produce and H (syngas) is a promising method for clean energy, but challenges remain, such as controlling the CO/H ratios required syngas yield. Herein, hydrophobic exfoliated MoS (H‐E‐MoS ) nanosheets are fabricated from bulk by cost‐effective ball‐milling method, followed decoration with fluorosilane (FAS). H‐E‐MoS electrocatalyst capable of directly reducing O tuneable production wide range (from 1:2 4:1). In addition, shows...

A highly flexible all-solid-state symmetric supercapacitor using an aramid nanofibers/PEDOT:PSS (ANFs/PEDOT:PSS) film exhibits excellent energy density and cycling stability.

The ability to topographically structure and fast controllably actuate hydrogel in two three dimensions is the key for their promising applications soft robots, microfluidic valves, cell drug delivery, artificial muscles. Inspired by evaporation-induced concentration differentiation phenomenon production process of beancurd sheet, we introduce a facile one-step evaporation create laminated layer/porous layer heterogeneous within graphene oxide-clay-poly(N-isopropylacrylamide) vertical...

Engineered asymmetric heterogeneous ion-selective membranes have become a focal point for their improved efficiency in harnessing osmotic energy from ionic solutions with varying salinity. However, achieving both conversion and excellent chemical stability necessitates effectively mitigating the formation of detrimental interface cracks between two different layers. We develop charge-gradient sulfonated poly(ether ether ketone) (SPEEK) membrane (CG-SPEEK) on large-scale using straightforward...

We present here for the first time an electrochemical switching reversible superoleophobic polyaniline (PANI) nanowire film from pinned to rolling state underwater. Importantly, based on unique adhesive switching, a "mechanical hand" oil droplet transportation without loss was easily achieved by applying low potential.

Oil‐polluted water is a worldwide problem due to the increasing industry oily wastewater and frequent oil‐spill pollution. Here, PEDOT‐PSS hydrogel meshes are successfully prepared by using in‐situ chemical polymerization on Ti mesh substrate, which composed of hierarchical porous structures present superhydrophilicity in air superoleophobicity underwater. And exhibit excellent environmental stability under series harsh conditions, used for separation mixtures oil various corrosive active...

Abstract C‐type cytochromes located on the outer membrane (OMCs) of genus Shewanella act as main redox‐active species to mediate extracellular electron transfer (EET) from inside external environment: central challenge that must be met for successful EET. The redox states OMCs play a crucial role in dictating rate and extent Here, we report surface wettability electrodes strongly influences EET activity living organisms loihica PV‐4 at fixed potential: hydrophilic electrode is more than five...

Abstract A novel heteroatoms (N, P, S and Fe) quaternary-doped carbon (HQDC-X, X refers to the pyrolysis temperature) can be fabricated by directly pyrolyzing a gram-negative bacteria, S. oneidensis MR-1 as precursors at 800 °C, 900 °C 1000 under argon atmosphere. These HQDC-X catalysts maintain cylindrical shape of bacteria after high temperatures, while including N, Fe distribute homogeneously on frameworks. As result, exhibit excellent electrocatalytic activity for ORR via dominant...

Due to a three-dimensional network structure filled with abundant water, hydrogel is an ideal candidate for underwater superoleophobic material, which has many promising applications in the fields of anti-bioadhesion, antifouling coating, oil/water separation, metal cleaning, and small oil-droplet manipulation.

The method of fabricating nonprecious metal electrocatalysts with high activity and durability through a facile eco-friendly procedure is great significance to the development low-cost fuel cells metal-air batteries. Herein, we present that an ancient chemical reaction "Pharaoh's snakes" can be fast convenient technique prepare Fe-/N-doped carbon (Fe/N-C) nanosheet/nanotube sugar, soda, melamine, iron nitrate as precursors. resultant Fe/N-C catalyst has hierarchically porous structure, large...

By closing and opening ion channels, electric eels are able to convert concentration gradients into electricity. Inspired by eels, considerable artificial sub-nanoscale channels with high selectivity transportation efficiency have been designed for harvesting the osmotic energy between ionic solutions of different salinities, but constructing smart ion-gated sub-nanochannels effective transport is still a huge challenge. Herein, photo-controllable metal-organic framework (MOF) NH2-MIL-53...

The practical application of lithium–sulfur (Li–S) batteries is seriously restricted by the "shuttle effect" polysulfide ions. design functional interlayers one effective solutions to overcome this defect. In work, titanium molybdenum nitride (TMN) solid solution nanoparticles have been successfully decorated on electrospun carbon nanofibers (CNFs) form a continuous flexible TMN@CNF membrane through one-step calcination process under NH3 atmosphere. By regulating mass ratio acetylacetonate...