【摘 要】
：
Heterogeneously catalyzed hydrolytic dehydrogenation of ammonia borane is a remarkable structure sen-sitive reaction.In this work,a strategy by using polyoxometalates(POMs)as the ligands is proposed to engineer the surface and electronic properties of Pt/
【机 构】
：
State Key Laboratory of Chemical Engineering,East China University of Science and Technology,Shangha
论文部分内容阅读
Heterogeneously catalyzed hydrolytic dehydrogenation of ammonia borane is a remarkable structure sen-sitive reaction.In this work,a strategy by using polyoxometalates(POMs)as the ligands is proposed to engineer the surface and electronic properties of Pt/CNT catalysts toward the enhanced hydrogen gener-ation rate and durability.Three kinds of POMs,i.e.,silicotungstic acid(STA),phosphotungstic acid(PTA)and molybdophosphoric acid(PMA),are comparatively studied,among which the STA shows positive ef-fects on the catalytic activity and durability.A catalyst structure-performance relationship is established by a combination of kinetic and isotopic analyses with multiple characterization techniques,such as HAADF-STEM,EDS,Raman spectroscopy and XPS.It is shown that the STA compared to the other two POMs can increase the Pt binding energy and thus promote the reaction.The insights demonstrated here could open a new avenue for boosting the reaction by employing the POMs as the ligands to engineer the catalyst electronic properties.
其他文献
Metallic Li is a promising anode material for high energy density batteries but it suffers from poor sta-bility and formation of unsafe dendrites.Previous studies demonstrated that 3D metal foams are able to improve the stability of Li metal but the prope
For designing batteries with high-rate and long-life,electronic/ionic transport and reaction must be uni-fied for metal oxide electrodes.However,it remains challenging for effectively integrating the whole sub-strate/active materials/electrolyte interface
Recently,two dimensional InSe attracts great attentions as potential hydrogen production photocatalysts.Here,comprehensive investigations on the hydrogen evolution reaction activity of InSe monolayer with 3d transition metal doping and biaxial strain were
The α phase Mo carbide has been widely investigated recently for its high activity in hydrogen production from water gas shift(WGS)reaction.However,high loading of noble metals as well as high economic and environmental cost derived from high-temperature
Hydrogen has been deemed as one of the most efficient en-ergy carriers for a broad variety of industrial applications[1,2].Large-scale,low-cost hydrogen production,safe storage and de-livery represent a tremendous technological challenge and have become a
Colloidal synthesis method such as oleylamine(OAm)-stabilized process is of great interest for obtain-ing uniform and highly dispersed platinum nanoparticle catalysts,yet the ligand may unavoidably in-hibit their electro-catalytic performance.Thus,fully r
The sluggish four-electron transfer of the oxygen evolution reaction(OER)limits the performance of water electrolyzers.Hence,OER electrocatalysts based on earth-abundant elements are urgently needed.Heteroatom doping has been an efficient approach to boos
Conversion-type reaction anode materials with high specific capacity are attractive candidates to improve lithium ion batteries(LIBs),yet the rapid capacity fading and poor rate capability caused by drastic vol-ume change and low electronic conductivity g
MXenes are a family of two-dimensional(2D)transition metal carbides,carbonitrides/nitrides with supe-rior physical and chemical properties,which have attracted extensive attention since the discovery in 2011.The impressive electrochemical activity of MXen
Electronic structures,which play a key role in determining electrical and optical properties of π-conjugated organic materials,have attracted tremendous interest.Efficient thermoelectric(TE)conver-sion of organic materials has rigorous requirements on ele