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Metal nanocrystals (NCs) are grown directly on the surface of reduced graphene oxide (rGO), which can maximize the rGO‐NCs contact/interaction to achieve the enhanced catalytic activity. However, it is difficult to control the size and morphology of metal NCs by in situ method due to the effects of functional groups on the surface of GO, and as a result, the metal NCs/rGO hybrids are conventionally...
Glucose sensing that is not influenced by the presence of chloride, uric acid, ascorbic acid and dopamine is achieved on ultrathin PtCu3 alloy wavy nanowires (WNWs). These WNWs are synthesized by a facile, one‐pot, templateless hydrothermal method in an atmosphere of CO, which is critical to the formation process. Their structural properties, including the abundance of twinning defects, make the as‐prepared...
A hexagonally ordered mesoporous cobalt phosphate (CoPi) material is prepared by a facile one‐pot soft‐templating strategy using cetyltrimethylammonium bromide template. Because of its highly accessible surface area and crystalline framework with abundant active sites, the mesoporous CoPi shows a high catalytic activity for the oxygen evolution reaction compared to previously reported noble/transition‐metal...
Nickel‐nitrogen‐modified graphene (Ni‐N‐Gr) is fabricated and Ni‐N coordination sites on Ni‐N‐Gr as active centers effectively reduce CO2 to CO. The faradaic efficiency for CO formation reaches 90% at −0.7 to −0.9 V versus RHE, and the turnover frequency for CO production comes up to ≈2700 h−1 at −0.7 V versus RHE.
Rational design of cost‐effective, nonprecious metal‐based catalysts with desirable oxygen reduction reaction (ORR) performance is extremely important for future fuel cell commercialization, etc. Herein, a new type of ORR catalyst of Co‐N‐doped mesoporous carbon hollow sphere (Co‐N‐mC) was developed by pyrolysis from elaborately fabricated polystyrene@polydopamine‐Co precursors. The obtained catalysts...
Hydrogen evolution reaction (HER) from water electrolysis is an attractive technique developed in recent years for cost‐effective clean energy. Although considerable efforts have been paid to create efficient catalysts for HER, the development of an affordable HER catalyst with superior performance under mild conditions is still highly desired. In this work, metal–organic frameworks (MOFs)‐templated...
The smooth electric transmission is crucial for the high‐efficient electrocatalysis. Herein, a series of peapod‐like metallic MxPy/C (M = Co, Ni, and Cu) composites is developed as bifunctional catalysts toward hydrogen and oxygen evolution reactions. For the first time, the metallic property of Cu3P is confirmed through the theoretical calculation. The in‐depth composition, structural and catalytic...
There is an urgent need to develop metal‐free, low cost, durable, and highly efficient catalysts for industrially important oxygen evolution reactions. Inspired by natural geodes, unique melamine nanogeodes are successfully synthesized using hydrothermal process. Sulfur‐modified graphitic carbon nitride (S‐modified g‐CNx) electrocatalysts are obtained by annealing these melamine nanogeodes in situ...
Developing cost‐effective electrocatalysts with high activity and stability for hydrogen evolution reaction (HER) plays an important role in modern hydrogen economy. Amorphous molybdenum sulfide (MoSx) has recently emerged as one of the most promising alternatives to Pt‐based catalysts in HER, especially in acidic electrolytes. Here this study reports a simple ultrasonic spray pyrolysis method to...
The construction of active sites with intrinsic oxygen evolution reaction (OER) is of great significance to overcome the limited efficiency of abundant sustainable energy devices such as fuel cells, rechargeable metal–air batteries, and in water splitting. Anionic regulation of electrocatalysts by modulating the electronic structure of active sites significantly promotes OER performance. To prove...
Anionic regulation of NiFe (oxy)sulfide catalysts is proposed by Qiang Zhang, Bo‐Quan Li, and co‐workers in article number 1700610, through modulating the electronic structure of water oxidization active sites. Such antagonistic S/O anions polarize the metal active sites, rendering the reactivity of electrochemical water oxidation.
Rational design of high active and robust nonprecious metal catalysts with excellent catalytic efficiency in oxygen evolution reaction (OER) is extremely vital for making the water splitting process more energy efficient and economical. Among these noble metal‐free catalysts, transition‐metal‐based nanomaterials are considered as one of the most promising OER catalysts due to their relatively low‐cost...
A novel mesoporous nanosheet networked hybrid comprising Co3O4 and Co3(PO4)2 is successfully synthesized using a facile and scalable method through calcinating the carbon, cobalt hydroxy carbonate, and cobalt phosphate composite precursor. Electron transfer from Co3O4 to Co3(PO4)2, together with the special networked structure and the porous nature of the nanosheets enable the Co3(PO4)2‐Co3O4 hybrid...
Owing to the strong in‐plane chemical bonds and weak van der Waals force between adjacent layers, investigations of layer structured materials have long been the hotspots in energy‐related fields. The intrinsic large interlayer space endows them capabilities of guest ion intercalation, fast ion diffusion, and swift charge transfer along the channels. Meanwhile, the well‐maintained in‐plane integrity...
Synthesizing noble metallic nanoparticles (NPs) enclosed by high‐index facets (HIFs) is challenged as it involves the tuning of growth kinetics, the selective adsorption of certain chemical species, and the epitaxial growth from HIF enclosed seeds. Herein, a simple and general strategy is reported by using dual reduction agents and dual capping agents to prepare Pt‐based alloy NPs with HIFs, in which...
Nanocatalysts with high platinum (Pt) utilization efficiency are attracting extensive attention for oxygen reduction reactions (ORR) conducted at the cathode of fuel cells. Ultrathin Pt‐based multimetallic nanostructures show obvious advantages in accelerating the sluggish cathodic ORR due to their ultrahigh Pt utilization efficiency. A focus on recent important developments is provided in using wet...
Mesoporous thin films of transition metal lithiates (TML) belong to an important group of materials for the advancement of electrochemical systems. This study demonstrates a simple one pot method to synthesize the first examples of mesoporous LiCoO2 and LiMn2O4 thin films. Molten salt assisted self‐assembly can be used to establish an easy route to produce mesoporous TML thin films. The salts (LiNO...
In article number 1701913, Ferdi Karadas, Ömer Dag, and co‐workers synthesize transparent mesoporous thin films of LiCoO2 and LiMn2O4 by employing a molten salt assisted self‐assembly method. A clear solution of the ingredients is coated over a subtrate that is heated at elevated temperatures to obtain the transparent mesoporous metal lithiates. The mesoporous LiCoO2 film electrode, coated over a...
The electrocatalytic oxygen evolution reaction (OER) is a highly important reaction that requires a relatively high overpotential and determines the rate of water splitting—a process for producing hydrogen. The overall OER performance is often largely limited by uncontrollable interface when active catalysts are loaded on conductive supports, for which polymer binders are widely used, but inevitably...
The development of effective approaches for preparing large‐area, self‐standing, ultrathin metal‐based nanosheets, which have proved to be favorable for catalytic applications such as water electrolysis, is highly desirable but remains a great challenge. Reported herein is a simple and versatile strategy to synthesize ultrathin Co3O4 and CoP NSs consisting of close‐packed nanoparticles by pyrolyzing...
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