Sulfur-rich carbons are minimally explored for potassium-ion batteries (KIBs). Here, a large amount of S (38 wt%) is chemically incorporated into carbon host, creating sulfur-grafted hollow spheres (SHCS) KIB anodes. The SHCS architecture provides combination nanoscale (≈40 nm) diffusion distances and CS chemical bonding to minimize cycling capacity decay Coulombic efficiency (CE) loss. exhibit reversible 581 mAh g-1 (at 0.025 A ), which the highest reported any carbon-based anode....

Abstract Constructing heterostructures with abundant interfaces is essential for integrating the multiple functionalities in single entities. Herein, synthesis of NiSe 2 /CoSe different interfacial densities via an innovative strategy successive ion injection reported. The resulting hybrid electrocatalyst dense heterointerfaces exhibits superior electrocatalytic properties alkaline electrolyte, to other benchmarks and precious metal catalysts. Advanced synchrotron techniques, post structural...

Abstract Tuning the catalytic active sites plays a crucial role in developing low cost and highly durable oxygen electrode catalysts with precious metal‐competitive activity. In an attempt to engineer Co 3 O 4 spinel for electrocatalysis alkaline electrolyte, herein, controllable synthesis of surface‐tailored nanocrystals including nanocube (NC), nanotruncated octahedron (NTO), nanopolyhedron (NP) anchored on nitrogen‐doped reduced graphene oxide (N‐rGO), through facile template‐free...

Quantum-dot light-emitting diodes (QLEDs) may combine superior properties of colloidal quantum dots (QDs) and advantages solution-based fabrication techniques to realize high-performance, large-area, low-cost electroluminescence devices. In the state-of-the-art red QLED, an ultrathin insulating layer inserted between QD oxide electron-transporting (ETL) is crucial for both optimizing charge balance preserving QDs' emissive properties. However, this key demands very accurate precise control...

Developing robust and highly active non-precious electrocatalysts for the hydrogen/oxygen evolution reaction (HER/OER) is crucial industrialization of hydrogen energy. In this study, a durable single-atom W-doped NiS0.5 Se0.5 nanosheet @ nanorod heterostructure (W-NiS0.5 ) electrocatalyst prepared. W-NiS0.5 exhibits excellent catalytic activity HER OER with ultralow overpotentials (39 106 mV 171 239 at 10 100 mA cm-2 , respectively) long-term durability (500 h), outperforming commercial...

Exploration of earth-abundant transition-metal sulfide electrocatalysts with Pt-like activity toward alkaline hydrogen evolution reaction (HER) is significant for future global energy supply but still a challenge. Herein, we rationally designed and fabricated self-supported F-anion-doped Ni3S2 nanosheet array grown on Ni foam (F–Ni3S2/NF) enhanced HER performance in media. The obtained catalyst exhibits low overpotential 38 mV at 10 mA cm–2 Tafel slope 78 dec–1 can sustain 30 h, which...

This work demonstrates the controllable synthesis of nickel sulfide nanocatalysts and phase/composition dependent performance for catalyzing overall water-splitting.

Iron–nickel sulfide ((Ni,Fe)3S2) is one of the most promising bifunctional electrocatalysts for both hydrogen evolution reaction (HER) and oxygen (OER) in alkaline media because their metallic conductivity low cost. However, reported HER activity (Ni,Fe)3S2 still unsatisfactory. Herein, three-dimensional self-supported phosphorus-doped nanosheet arrays on Ni foam (P-(Ni,Fe)3S2/NF) are synthesized by a simple one-step simultaneous phosphorization sulfuration route, which exhibits dramatically...

Rational design of bifunctional efficient electrocatalysts for both oxygen reduction (ORR) and evolution reactions (OER) is desirable-while highly challenging-for development rechargeable metal-air batteries. Herein, an electrocatalyst designed fabricated by encapsulating Co nanoparticles in interconnected N-doped hollow porous carbon nanofibers (designated as Co@N-C/PCNF) using ultrafast high-temperature shock technology. Benefiting from the synergistic effect intrinsic activity CoNC...

The Li-CO2 battery is a novel strategy for CO2 capture and energy-storage applications. However, the sluggish reduction evolution reactions cause large overpotential poor cycling performance. Herein, new catalyst containing well-defined ruthenium (Ru) atomic clusters (RuAC ) single-atom Ru-N4 (RuSA composite sites on carbon nanobox substrate (RuAC+SA @NCB) (NCB = nitrogen-doped nanobox) fabricated by utilizing different complexation effects between Ru cation amine group (NH2 quantum dots or...

Abstract It is vitally important to develop highly active, robust and low‐cost transition metal‐based electrocatalysts for overall water splitting in neutral solution especially at large current density. In this work, amorphous Mo‐doped NiS 0.5 Se nanosheets@crystalline nanorods (Am−Mo−NiS ) was synthesized using a facil one‐step strategy. phosphate buffer saline solution, the Am−Mo−NiS shows tiny overpotentials of 48 209 mV hydrogen evolution reaction (HER), 238 514 oxygen (OER) 10 1000 mA...

High-entropy oxide (HEO) including multiple principal elements possesses great potential for various fields such as basic physics, mechanical properties, energy storage, and catalysis. However, the synthesis method of high-entropy compounds through traditional heating approach is not conducive to rapid properties screening, current elemental combinations HEO are also highly limited. Herein, we report a Joule-heating nickel foil with dozens seconds. rocksalt oxides (HERSO) new combination,...

Owing to their unique electronic structure and maximum atom utilization efficiency, single-atom catalysts have received widespread attention exhibited efficient activity. Herein, we report the preparation of non-metal Se single atoms embedded in nitrogen-doped carbon (NC) via a high-temperature reduction strategy for electrocatalytic oxygen reaction (ORR). Selenium dioxide is reduced selenium by NC at high temperature partially anchored form C-Se-C bond. Impressively, obtained catalyst...

Abstract Transition metal chalcogenides (TMCs) have been identified as pre‐electrocatalysts for the oxygen evolution reaction (OER) and high valent TMs in situ generated oxyhydroxides are considered to be real OER catalytic center. However, role of chalcogens process has ignored not fully elucidated. Herein, it is discovered that about 2.8–3.5% remain oxidized derivatives at a steady state, which plays vital enhancing activity. A facile spontaneous sulfurizing method developed synthesize...

Abstract Abundant surface structural defects can endow electrocatalysts with extraordinary physical and chemical characteristics. Herein, metastable Pd nanoparticles (NPs) abundant twin boundaries (TBs) atomic steps (ASs) anchored on a carbon substrate (TS‐Pd/C) are directly synthesized by solid‐state thermal shock (TS) strategy. Molecular dynamics simulation indicates that the transient super cooling procedure after TS synthesis boost formation of TBs. Benefitting from TBs ASs, these NPs...

Abstract Facilitating the cleavage of a NN bond and suppressing competition hydrogen evolution reaction is essential, but still remains challenge in nitrogen reduction (NRR). Crystal phase tailoring an effective approach to optimize energy barrier during NRR process improve catalytic efficiency. Herein, boron‐doping strategy induce transfer from hexagonal Mo 2 C cubic for regulating electronic structure properties electrocatalysts toward reported. The B doped found increase exposure active...

High-entropy compounds with extraordinary properties due to the synergistic effect of multiple components have exhibited great potential and attracted extensive attention in various fields, including physics, mechanical property analysis, energy storage. Achieving universal stability synthesis high-entropy a wide range structures continues be difficult high complexity multicomponent mixing. Here, we propose design strategy generality for realizing that one metal site like framework compound...

Abstract The realization of seawater electrolysis requires the development electrode materials that can meet requirements high activity, selectivity, and corrosion resistance. Herein, this work successfully prepares a molybdate (MoO 4 2− )‐modulated nickel‐iron oxide for via quick easy thermal shock method, with activity extraordinary durability in oxygen evolution reaction (OER) electrolysis. experimental analyses theoretical calculations reveal situ generated MoO on surface modulate...

Dual-atom catalytic sites on conductive substrates offer a promising opportunity for accelerating the kinetics of multistep hydrogen and oxygen evolution reactions (HER OER, respectively). Using MXenes as is strategy depositing those dual-atom electrocatalysts, if efficient surface anchoring ensuring metal-substrate interactions sufficient mass loading established. We introduce surface-modification MXene by preadsorbing L-tryptophan molecules, which enabled attachment Co/Ni electrocatalyst...

Bimetallic layered double hydroxides (LDHs) are promising catalysts for anodic oxygen evolution reaction (OER) in alkaline media. Despite good stability, NiCo LDH displays an unsatisfactory OER activity relative to the most robust NiFe and CoFe LDH. Herein, a novel electrocatalyst modified with single-atom silver grown on carbon cloth (AgSA -NiCo LDH/CC) that exhibits exceptional stability 1.0 m KOH is reported. The AgSA LDH/CC catalyst only requires low overpotential of 192 mV reach current...

The sluggish kinetics and mutual interference of oxygen evolution reduction reactions in the air electrode resulted large charge/discharge overpotential low energy efficiency Zn-air batteries. In this work, we designed a breathing air-electrode configuration battery using P-type Ca3 Co4 O9 N-type CaMnO3 as charge discharge thermoelectrocatalysts, respectively. Seebeck voltages generated from thermoelectric effect synergistically compensated overpotentials. carrier migration accumulation on...