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Alkaline water electrolysis is an advanced technology for scalable H2 production using surplus electricity from intermittent energy sources, but it remains challenging for non‐noble electrocatalysts to split water into hydrogen and oxygen efficiently, especially for tungsten disulfide (WS2)‐based catalysts. Density functional theory calculations in combination with experimental study are used to establish...
Transition‐metal oxides with a strain effect have attracted immense interest as cathode materials for fuel cells. However, owing to the introduction of heterostructures, substrates, or a large number of defects during the synthesis of strain‐bearing catalysts, not only is the structure–activity relationship complicated but also their performance is mediocre. In this study, a mode of strain introduction...
Organic molecular catalysts have received great attention as they have the merits of well‐controlled molecular structures for the development of catalytic chemistry. Herein, the electronic distribution of active sites is regulated by asymmetrically introducing S‐heterocycle on one side of the molecular core. As a result, the asymmetric as‐PYT and as‐BNT show higher oxygen reduction performance than...
Hydrogen produced using renewable electricity is considered the key to achieving a low‐carbon energy economy. However, the large‐scale application of electrochemical water splitting for hydrogen evolution currently requires expensive platinum‐based catalysts. Therefore, it is important to develop efficient and stable catalysts based on the rich reserves of transition metals as alternatives. In this...
Hydrogen economy is imagined where excess electric energy from renewable sources stored directly by electrochemical water splitting into hydrogen is later used as clean hydrogen fuel. Electrocatalysts with the superhigh current density (1000 mA cm−2‐level) and long‐term durability (over 1000 h), especially at low overpotentials (<300 mV), seem extremely critical for green hydrogen from experiment...
Developing efficient, durable, and low‐cost earth‐abundant elements‐based oxygen evolution reaction (OER) catalysts by rapid and scalable strategies is of great importance for future sustainable electrochemical hydrogen production. The earth‐abundant high‐valency metals, especially vanadium, can modulate the electronic structure of 3d metal oxides and oxyhydroxides and offer the active sites near‐optimal...
Literature reports have shown that in primary structures, single‐atom catalysts exhibit better performance than cluster and nanoparticles due to their maximum atom utilization and the fine‐tuning of the electronic structure of the active sites. Hierarchical structures have recently been extensively studied because of increased active sites and orderliness of channels significantly improves the catalytic...
Lithium–oxygen batteries (LOBs) with ultra‐high theoretical energy density (≈3500 Wh kg−1) are considered as the most promising energy storage systems. However, the sluggish kinetics during the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) can induce large voltage hysteresis, inferior roundtrip efficiency and unsatisfactory cyclic stability. Herein, hydrangea‐like NiO@Ni2P heterogeneous...
Single atom Fe–nitrogen–carbon (Fe–N–C) catalysts have high catalytic activity and selectivity for the oxygen reduction reaction (ORR), and are possible alternatives for Pt‐based materials. However, the reasonable design and selection of precursors to establish their relationship with Fe–N–C catalyst performance is still a formidable task. Herein, precursors with controllable structures are easily...
Numerous studies have explored new materials for electrocatalysts, but it is difficult to discover materials that surpass the catalytic activity of current commercially available noble metal electrocatalysts. In contrast to conventional transition metal alloys, high‐entropy alloys (HEAs) have immense potential to maximize their catalytic properties because of their high stability and compositional...
It is an effective strategy to develop novel electrocatalysts with controllable defects to enhance their electrocatalytic activity and stability. However, how to precisely design these catalysts on the atom scale remains very difficult. Herein, several vacancy‐dependent CoZnxMn2–xO4 catalysts are prepared through tailoring the concentration of Zn ions. The in situ activation of the obtained products...
Electrochemical N2 fixation requires effective electrocatalysts to expedite the nitrogen reduction reaction (NRR) kinetics and suppress the concomitant hydrogen evolution reaction (HER). Although transition metal sulfides have been deemed as efficient NRR electrocatalysts, it remains a great challenge to suppress the serious HER to achieve high Faradaic efficiency (FE). Herein, vanadium disulfide...
One major challenge in heterogeneous catalysis is to reduce the usage of noble metals while maintaining the overall catalytic stability and efficiency in various chemical environments. In this work, a series of high‐entropy catalysts are synthesized by a chemical dealloying method and find the increased entropy effect and non‐noble metal contents would facilitate the formation of complete oxides with...
A facile multistage regulated strategy is reported to synthesize ZnCo‐NC based carbon nanotubes including DMEA induced crystallization, Zn ion activation, and magnetic control growth of carbon nanotubes. Uniform Co distribution and the modulation of Zn, and their catalytic properties are carefully investigated by X‐ray absorption spectroscopy and X‐ray photoelectron spectroscopy. The surface contents...
Intrinsic hydrogen evolution reaction (HER) activity and the mechanism of antiperovskite Ni3In1‐xCuxN bulk cubic particles and multi‐crystalline nanoplates are thoroughly investigated. Stoichiometric Ni3In0.6Cu0.4N reaches the best HER performance, with an overpotential of 102 mV in its multi‐crystalline nanoplates obtained from the LDH‐derived method, and 143 mV in its bulk cubic particles from the...
Though several Pt‐free hydrogen evolution reaction (HER) catalysts have been reported, their employment for industry is challenging. Here, a facile pyrolysis method to obtain phase‐pure CrP nanoparticles supported on N, P dual‐doped carbon (CrP/NPC) is reported to be tuned toward industrial HER. Interestingly, CrP/NPC exhibits excellent HER activity that requires an overpotential of 34 mV to attain...
It is still a great challenge to explore hydrogen evolution reaction (HER) electrocatalysts with both lower overpotential and higher stability in acidic electrolytes. In this work, an efficient HER catalyst, Ru@COF‐1, is prepared by complexation of triazine‐cored sp2 carbon‐conjugated covalent organic frameworks (COFs) with ruthenium ion. Ru@COF‐1 possesses high crystallinity and porosity, which are...
Morphological control of noble‐metal‐based nanocrystals has attracted enormous attention because their catalytic behaviors can be optimized well by adjusting the size and shape. Herein, the controllable synthesis of web‐footed PdCu nanosheets via a facile surfactant‐free method is reported. It is discovered that the Cu(II) precursor in this synthetic system displays a critical role in growing branches...
Single‐atom catalysts (SACs) hold the promise of utilizing 100% of the participating atoms in a reaction as active catalytic sites, achieving a remarkable boost in catalytic efficiency. Thus, they present great potential for noble metal‐based electrochemical application systems, such as water electrolyzers and fuel cells. However, their practical applications are severely hindered by intrinsic complications,...
Single atom sites (SAS) of FeN4 are clarified as one of the most active components for the oxygen reduction reaction (ORR). Effective strategies by engineering the local coordination environment and site density of FeN4 sites are crucial to further enhance the electrocatalytic ORR performance. Herein, the integration of a second metal of Mn with Fe to construct Fe&Mn/N‐C catalysts with enhanced...
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