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| 1 | MoS_(2) nanoflowers coupled with ultrafine Ir nanoparticles for efficient acid overall water splitting reaction显示文摘Bi-functional electrocatalysts for acid overall water splitting reactions are crucial but still challenging to the development of proton exchange membrane water electrolysis.Herein,an efficient bi-functional catalyst of Ir/MoS_(2) nanoflowers(Ir/MoS_(2) NFs) catalyst was reported for acidic water electrolysis which can be constructed by coupling three-dimensionally interconnected MoS_(2) NFs with ultrafine Ir nanoparticles.A more suitable adsorption ability for the H* and *OOH intermediates was revealed,where the Ir sites were proposed as the main active center and MoS_(2) promoted the charge relocation to electronically modify the interfacial structure.The significant interfacial charge redistribution between the MoS_(2) NFs and the Ir active sites synergistically induced excellent catalytic activity and stability for the water electrolysis reaction.Specifically,the catalyst required overpotentials of 270 and 35 mV to reach a kinetic current density of 10 mA cm^(-2)for OER and HER,respectively,loading on the glass carbon electrode,with high catalytic kinetics,stability,and catalytic efficiency.A two-electrode system constructed by Ir/MoS_(2) NFs drove 10 mA cm^(-2)at a cell voltage of 1.55 V,about 70 mV lower than that of the commercial Pt/C||IrO_(2) system.In addition,partial surface oxidation of Ir nanoparticles to generate high-valent Ir species was also found significant to accelerate OER.The enhanced catalytic performance was attributed to the strong metal-support interaction in the Ir/MoS_(2) NFs catalyst system that changed the electronic structure of Ir metal and promoted the synergistic catalytic effect between Ir and MoS_(2) NFs.The work presented a novel platform of Ir-catalyst for proton exchange membrane water electrolysis. | Chunyan Wang Lice Yu Fulin Yang Ligang Feng | 2023 | Journal of Energy Chemistry2023，，12： | 0 |
| 2 | Butterfly and Nest-Shaped Tp*-W-Cu-S Cluster Monomers and Dimers with Hexamethylenetetramine as Ligand:Anion-Dependent Structures and Nonlinear Optical Properties显示文摘Main observation and conclusion The assembly of[Et4N][Tp*WS3](1)with CuX(Tp*=hydridotris(3,5-dimethylpyrazol-1-yl)borate;X=Cl,Br,andI)or[Cu(MeCN)][PF6]in the presence of tetratopic ligand hexamethylenetetramine(HMT)afforded an array of four cluster-based compounds,which are either neutral or anionic.These compounds include[Tp*WSzCu3Cl2(HMT)](2,monomer,neutral),[Tp*WSzCugBr2(HMT)](3,monomer,neutral),[Tp*WSzCu3l1 s(HMT)21(4,dimer,anionic),and[Tp*WSzCu2(HMT)]2(PFc)2(5,dimer,anionic).The size of the halogen is found to dictate the structures(2/3 versus 4),and the presence/absence of halogen also affects the utiliation of coordinate site of HMT(4 versus 5)by creating more available CuOite in the case of 5.The structures of 2-5 are also characterized using elemental analysis,Fourier-transform infrared(FT-IR)spectra,and ultraviolet-visible(UV-Vis)spectroscopy,with the dimeric structure of 5 also selected for the third-order nonlinear optical(NLO)property investigations.The NLO measurement results suggest that the hyperpola rizability value(v)of 5,reflecting its NLO properties as a neat material,features 2.12×10^(-30)esu,and it is comparable to other W/Cu/S clus-terbased molecular entities,rendering 5 a promising NLO-active material. | Quan Liu Mingie Lu Lice Yu Yinglin Song Jianping Lang | 2021 | Chinese Journal of Chemistry2021，39，3： | 0 |
| 3 | Low carbon alcohol fuel electrolysis of hydrogen generation catalyzed by a novel and effective Pt–CoTe/C bifunctional catalyst system显示文摘Low carbon alcohol fuels electrolysis under ambient conditions is promising for green hydrogen generation instead of the traditional alcohol fuels steam reforming technique,and highly efficient bifunctional catalysts for membrane electrode fabrication are required to drive the electrolysis reactions.Herein,the efficient catalytic promotion effect of a novel catalyst promoter,CoTe,on Pt is demonstrated for low carbon alcohol fuels of methanol and ethanol electrolysis for hydrogen generation.Experimental and density functional theory calculation results indicate that the optimized electronic structure of Pt–CoTe/C resulting from the synergetic effect between Pt and CoTe further regulates the adsorption energies of CO and H*that enhances the catalytic ability for methanol and ethanol electrolysis.Moreover,the good water activation ability of CoTe and the strong electronic effect of Pt and CoTe increased the tolerance ability to the poisoning species as demonstrated by the CO-stripping technique.The high catalytic kinetics and stability,as well as the promotion effect,were also carefully discussed.Specifically,71.9%and 75.5%of the initial peak current density was maintained after 1000 CV cycles in acid electrolyte for methanol and ethanol oxidation;and a low overpotential of 30 and 35 mV was required to drive the hydrogen evolution reaction in methanol and ethanol solution at the current density of 10 mA cm^(-2).In the two-electrode system for alcohol fuels electrolysis,using the optimal Pt–CoTe/C catalyst as bi-functional catalysts,the cell potential of 0.66 V(0.67 V)was required to achieve 10 mA cm^(-2) for methanol(ethanol)electrolysis,much smaller than that of water electrolysis(1.76 V).The current study offers a novel platform for hydrogen generation via low carbon alcohol fuel electrolysis,and the result is helpful to the catalysis mechanism understanding of Pt assisted by the novel promoter. | Yang Zhou Lice Yu Jinfa Chang Ligang Feng Jiujun Zhang | 2024 | Green Energy & Environment2024，9，4： | 0 |
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