摘要：The development of inexpensive and efficient Pt-free electrocatalysts for the hydrogen evolution reaction(HER)is greatly crucial for water *** carbide(WC)exhibiting a Pt-like electronic structure represents an attractive alternative,although its overall performance is limited by the strong W-H bond that impedes hydrogen ***,we employed an in-situ interface engineering strategy to construct high-performance and cost effective electrocatalysts comprising WC/tungsten phosphide(WP)heterostructures that were anchored on N,P-codoped carbon(WC/WP@NPC)via a one-step pyrolysis of a melamine polyphosphate/WO_(3) hybrid in an inert *** to the crystal structure compatibility and electron-rich property of WP,it optimizes the electronic structure and hydrogen adsorption configuration of WC,thus significantly weakening the W-H bond with a thermoneutral Gibbs free energy of hydrogen adsorption(ΔG_(H^(*)))of−0.05 ***,NPC ensures fast electron transport and structural stability of the WC/WP@NPC ternary *** synergistically lead to outstanding HER performances of the catalyst in acidic and alkaline *** finding offers a new strategy for designing Pt-alternative electrocatalysts with outstanding electrochemical performances for high-efficiency water splitting and other applications.

摘要：Alloyed nanoparticles with core-shell structures provide a favorable model to modulate interfacial interaction and surface structures at the atomic level,which is important for designing electrocatalysts with high activity and ***,core-shell structured Pd3M@Pt/C nanoparticles with binary PdM alloy cores(M=Fe,Ni,and Co)and a monolayer Pt shell were successfully synthesized with diverse *** these,Pd3Fe@Pt/C exhibited the best oxygen reduction reaction catalytic performance,roughly 5.4 times more than that of the commercial Pt/C catalyst used as *** significantly enhanced activity is attributed to the combined effects of strain engineering,interfacial electron transfer,and improved Pt *** functional theory simulations and extended X-ray absorption fine structure analysis revealed that engineering the alloy core with moderate lattice mismatch and alloy composition(Pd3Fe)optimizes the surface oxygen adsorption energy,thereby rendering excellent electrocatalytic *** researches may use this study as a guide on the construction of highly effective core-shell electrocatalysts for various energy conversions and other applications.

摘要：Alkali-water electrolyzers and hydroxide exchange membrane fuel cells are emerging as promising technologies to realize hydrogen *** cost-effective electrode materials with high activities towards corresponding hydrogen evolution(HER)and oxidation(HOR)reactions plays a crucial role in commercial hydrogen production and ***,we fabricated a V-doped Ni_(3)N/Ni heterostructure(V-Ni_(3)N/Ni)through a controlled nitridation treatment on a V-incorporated nickel hydroxide *** resultant catalyst exhibits comparable catalytic activity and durability to commercial Pt/C in terms of both HER(a low overpotential of 44 mV at the current density of 10 mA·cm^(-2))and HOR(a high current density of 1.54 mA·cm^(-2)at 0.1 V versus reversible hydrogen electrode)under alkaline *** superior activity of V-Ni_(3)N/Ni grown on different substrates further implies its intrinsic *** functional theory(DFT)calculations reveal that the coupled metallic Ni and doped V can promote the water adsorption,accelerate the Volmer step of alkaline HER,as well as optimize the adsorption and desorption of hydrogen intermediate(H^(*))to reach a balancedΔGH*value.

摘要：The electrochemical CO_(2)reduction reaction(CO_(2)RR)to yield high-value added fuels and chemicals provides a promising approach towards global carbon *** endeavors have been devoted to the exploration of high-efficiency catalyst with rapid reaction kinetics,low energy input,and high *** addition to the maximum metal atomic utilization and unique catalytic performance of single-atom catalyst(SAC),dual-atomic-site catalysts(DASCs)offer more sophisticated and tunable atomic structure through the modulations of another adjacent metal atom,which can bring new opportunities for CO_(2)RR as a deeper extension of SACs and have recently aroused surging *** this review,we highlight the recent advances on DASCs for enhancing CO_(2)***,the classification,synthesis,and identification of DASCs are provided according to the geometric structure and electronic configuration of dual-atomic active ***,the catalytic applications of DASCs in CO_(2)RR are categorized based on marriage-type,hetero-nuclear,and homo-nuclear dual-atomic ***,the structure-activity relationship of DASCs in CO_(2)RR is elaborately summarized through systematically analyzing the reaction pathways and the atom ***,the opportunities and challenges are proposed for inspiring the design of future DASCs with high structural accuracy and high CO_(2)RR activity and selectivity.

摘要：Surface modification using biomaterials is crucial for constructing bioactive interfaces that can control cell behavior,regulate biological processes,and interact with specific *** acid(TA),a naturally derived polyphenol,is of particular interest due to its ability to complex ions,facilitating the fabrication of coordination networks through self-assembly of TA and metal ions,known as metal-phenolic networks(MPNs).These MPNs can form stable,yet dynamic structures that can be further engineered or tailored for specific therapeutic *** TA-based MPN complexes have been constructed to modify diverse biointerfaces due to their unique physiochemical properties,including universal adhesion,pH responsiveness,controllable size and stiffness,ease of preparation,and excellent biocompatibility,which are highly advantageous for various biological applications,particularly in cell *** review explores the synthesis,properties,and applications of TA-based MPNs in the context of therapeutic cells,including bacteria,yeast,and mammalian *** aspects such as biocompatibility,biodegradability,the ability to modulate cellular environments,and clinical translation are discussed,highlighting the potential of TA-based MPNs to advance cell therapy.

摘要：The selective detection of harmful gases is of great significance to human health and air quality,triggering the need for special customizations of sensing material *** this study,we prepared a novel Sn S_(2)/black phosphorus(BP)two-dimensional(2D)-2D heterostructure via the in situ hydrothermal growth of Sn S_(2)nanosheets on exfoliated BP lamellae for NO_(2)sensing *** the Sn S_(2)/BP composite,the holes with high oxidizability in p-type BP could oxidize Sn^(2+)into Sn^(4+),thus inhibiting the formation of Lewis acidic S *** Sn^(2+)/Lewis acidity suppression of the composite was further confirmed by X-ray photoelectron spectroscopy and acidic double-layer capacitance analyses,and promoted the adsorption and detection of acidic NO_(2).Owing to its valence and Lewis acidity engineering,the Sn S_(2)/BP heterostructure sensor could detect trace levels of NO_(2)as low as 100 ppb(parts per billion)with high response,fast response/recovery,good stability,and selectivity at room *** high absorption energy of NO_(2)(à0.74 e V),as indicated by the density functional theory calculations,suggests that NO_(2)was chemically adsorbed on the Sn S_(2)/BP surface,which was also evidenced by the in situ Raman spectroscopy *** work opens up interesting opportunities for the rational design of highly efficient NO_(2)gas sensors through Lewis acidity modification and interface engineering.

摘要：高灵敏度的自驱动紫外探测器在许多应用中都大有可为.本研究提出了一种一维ZnO基同结光电探测器,它包括表面覆盖着Ag纳米线的锑掺杂ZnO微米线(AgNWs@ZnO:Sb MW)、MgO缓冲纳米层和ZnO薄膜.该探测器在0 V偏压下对紫外光非常敏感,其性能参数包括约7个量级的开关比、292.2 mA W^(-1)的响应度、6.9×10^(13)Jones的比探测率,以及微秒量级的快速响应速度(上升时间16.4μs,下降时间465.1μs).特别是10μW cm^(-2)的微弱紫外光时接近99.3%的外量子效率.此外,本文系统研究了MgO纳米薄膜和表面修饰AgNWs对探测器件性能增强的机理.作为自驱动光接收器,该光电二极管被进一步集成到能够实时传输信息的紫外通信系统中.此外,基于AgNWs@p-ZnO:Sb MW/i-MgO/n-ZnO的同质结9×9阵列显示出均匀的光响应分布,可用作具有良好空间分辨率的成像传感器.这项研究有望为设计高性能紫外光检测器提供一条具有低功耗和可大规模建造的途径.