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1Constructing Ni_(4)W/WO_(3)/NF with strongly coupled interface for hydrogen evolution in alkaline media显示文摘The pursuit of storing renewable electricity in chemical bonds has encouraged the effort toward developing efficient electrocatalysts for alkaline hydrogen production.However,the additional step of water dissociation under alkaline conditions frequently limits the performance of electrocatalysts in alkaline media.Herein,we synthesize Ni_(4)W/WO_(3) with a strongly coupled interface on the Ni foam(NF)by phase transition of NiWO_(4),to enhance the activity for alkaline hydrogen production.It is discovered that the strong binding hydroxyl on WO_(3) sites facilitates the dissociation of water,which in turn promotes hydrogen evolution through the synergy effect of strong adsorption of H on Ni sites.The adsorption/desorption energy of Ni sites is further tuned by the formation of intermetallic Ni4W.Owing to the three-dimensional structure and tailored composition,the Ni_(4)W/WO_(3)/NF electrocatalyst exhibits a low overpotential of 31 mV at a current density of10 mA·cm^(-2),with a Tafel slope of 38 mV·dec^(-1).This work provides new opportunities to modulate the catalytic performance of Ni-based electrocatalysts by signifying the metal-oxide interface.Teng Zhang Yi-Hong Yu Chuang-Wei Liu Gao-Wu Qin Song Li 2023Rare Metals2023,42,12:0
2A theoretical insight about co-pyrolysis reaction of natural gas and coal显示文摘The co-pyrolysis of natural gas and coal is a promising way for the production of acetylene due to its high efficiency for energy and hydrogen utilization.This work investigated the thermodynamics for the copyrolysis reaction of natural gas and coal using density functional theory.The favorable reaction conditions are presented in the form of phase diagrams.The calculation results show that the extra amount of methane may benefit the production of acetylene in the co-pyrolysis reaction,and the C/H ratio of 1:1,temperature around 3000 K and pressure at 0.1 MPa are most favorable.The results would provide basic data for related industrial process for the production of acetylene.Mingjun Pan Chengkai Jin Bingying Han Runping Ye Rongbin Zhang Gang Feng 2023Chinese Journal of Chemical Engineering2023,63,11:0
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