Energy crisis and environmental pollution are two major challenges facing the development of the world today. Hydrogen energy has attracted worldwide attention due to its high thermal efficiency and zero emission. How...Energy crisis and environmental pollution are two major challenges facing the development of the world today. Hydrogen energy has attracted worldwide attention due to its high thermal efficiency and zero emission. However, it is restricted by the low efficiency and poor stability of the hydrogen evolution reaction (HER) catalyst, which restricts the development and application of hydrogen energy. Therefore, the development of efficient and cheap clean energy catalysts is an important research direction in the development of modern science and technology. In this paper, a highly efficient catalyst for the hydrogen evolution of Co1-xS/ZnS@C composites based on 3D template synthesis is introduced. Electrochemical tests show that the Co1-xS/ZnS@C composite catalyst exhibits very good catalytic activity, including overpotential of only 159 mV at 10 mA / cm2, a Tafel slope of only ~93 mV/dec and very high electrochemical stability. Further material characterization shows that the reason why the Co1-xS/ZnS@C composite catalyst has good catalytic activity is due to the good conductivity of Co1-xS/ZnS, the nanostructure and the synergistic effect between Co1-xS/ZnS encapsulated in the porous carbon. In a word, this work introduces a new preparation scheme for designing and synthesizing high-efficiency HER composite catalyst, which promotes the further application of hydrogen energy.展开更多
文摘Energy crisis and environmental pollution are two major challenges facing the development of the world today. Hydrogen energy has attracted worldwide attention due to its high thermal efficiency and zero emission. However, it is restricted by the low efficiency and poor stability of the hydrogen evolution reaction (HER) catalyst, which restricts the development and application of hydrogen energy. Therefore, the development of efficient and cheap clean energy catalysts is an important research direction in the development of modern science and technology. In this paper, a highly efficient catalyst for the hydrogen evolution of Co1-xS/ZnS@C composites based on 3D template synthesis is introduced. Electrochemical tests show that the Co1-xS/ZnS@C composite catalyst exhibits very good catalytic activity, including overpotential of only 159 mV at 10 mA / cm2, a Tafel slope of only ~93 mV/dec and very high electrochemical stability. Further material characterization shows that the reason why the Co1-xS/ZnS@C composite catalyst has good catalytic activity is due to the good conductivity of Co1-xS/ZnS, the nanostructure and the synergistic effect between Co1-xS/ZnS encapsulated in the porous carbon. In a word, this work introduces a new preparation scheme for designing and synthesizing high-efficiency HER composite catalyst, which promotes the further application of hydrogen energy.
