Preparation Of Porous Nickel-based Composite Electrode And Its Electrocatalytic Activity For HER

Energy has been regarded as the most basic human social development needswith increase of global population and economic development.The exhaustion of the oil, coal and other non-renewable resources limits the development of human society and economy.The hydrogerienergy were placed high expectations as its advantages of clean, efficient and renewable.Hydrogen, as a kind of secondary energy, produced fromhydrogen-containing material such aswater, fossil fuels. Hydrogen production methods mainly includewater splitting, coal gasification, heavy oil reforming hydrogen productionand so on. The most maturemethod of Hydrogen production isfossil fuelreforming to hydrogen production.Some factors limit the large-scale production and utilization of hydrogen, due to its process complex, high energy consumption, high cost of hydrogen production, low yield and so on.water-splitting is considered to be a most promising hydrogen production technologies, as itssimple operation, low cost and no pollution.High cost of hydrogen production limits hydrogen to used widely due tohydrogen evolution over-potential of energy-intensive to make it not used widely in the actual production.Therefore, the key challenge forelectrochemical HER is the exploration of low-cost and highlyefficient electrocatalysts with low over-potential and long-termstability.Porous nickel, a kind of function and structure of the double properties of new engineering materials,has aroused the concern of the researchers at home and abroad because of its low cost, large specific surface area, low density, good adsorption and exchange.In this paper, we use different methods to prepared the Nano-porous nickel andporous nickel base composite materials, and the electrochemical activity of hydrogen evolution and stability was tested.The paper mainly includes the following two parts:1. The nanometer porous nickel was prepared using dealloying corrosion, and the corresponding electrochemical properties were tested. Wepreparednanometer porous withaperture 50～80 nm, using dealloying corrosion to take off the active component in the NiAl alloy. In addition, using electrodeposition method, uniform zinc was deposited to the surface of nickel foam, we prepared nanometer porous with aperture 1 Jim by dealloying corrosion to take off the active component in the NiZn alloy.Compared to theconventional 2D planar architecture, self-supported hydrogenevolvingelectrodes based on 3D porous materials might offer alarge electroactive surface and thus improve the activity. Compared with block nickel, the nanometer porous nickel showed lower hydrogen evolution over-potential.2, we report the fabrication of Ni2P/Ni foam by composite electrode material by the Temperature programmed reduction method, and the corresponding electrochemical performance test. M2P/N1 foam shows excellent catalytic activity of hydrogen evolution because of its large specific surface area and good electrical conductivity with a low onset over-potential of 120 mV and asmall Tafel slope of 126 mV dec-1 in the over-potential region of 150-250 mV.