نتایج جستجو برای: precious metal
تعداد نتایج: 201716 فیلتر نتایج به سال:
Pt-free cathode catalysts for polymer electrolyte membrane fuel cells have been prepared by multi-step pyrolysis of FePc and PhRs, in the best of which show extensively high initial cell performance and good durability compared to other present precious-metal-free cathode catalysts to date.
Several common properties shared by cryptocurrencies and precious metals, such as safe haven, hedge diversification for risk assets, have been widely discussed since Bitcoin was created in 2008. However, no studies explored whether cryptocurrency market uncertainties can help to explain forecast volatilities metal markets. By using the GARCH-MIDAS model incorporating policy price uncertainty, w...
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