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release time:2023-10-26 Hits: Popular:AG11 battery
The principle of electrolyzing water is widely used in our lives. However, the only disadvantage is that the catalyst is too expensive. In order to further reduce the cost of the catalyst, we have also increased related research. Let’s take a look at the specific results. . The reporter learned from the Hefei Institute of Physical Sciences, Chinese Academy of Sciences, that the research group of researcher Li Yue from the Institute of Solid State Physics of the institute has made new progress in the preparation of hierarchical heterostructure Ni3Se4@NiFe hydrotalcite nanosheets and its complete water splitting research. Related research The results were recently published in Nano Vision. This research work provides an effective design idea for the development of low-cost, high-activity bifunctional water electrolysis catalysts. The key to the large-scale application of electrolyzed water is how to reduce the overpotential of the anode oxygen evolution reaction (OER) and cathode hydrogen evolution reaction (HER), achieve high current hydrogen production at low potential, and then reduce power consumption and hydrogen production costs. Research shows that noble metals such as Ru, Ir, Pt and their oxides have the best hydrogen evolution catalytic performance, but their high price and lack of resources limit the wide application of these materials. Therefore, the development of cheap and efficient non-noble metal water electrolysis catalysts is of great scientific significance and practical value. Existing catalysts usually only have high catalytic activity for one reaction (OER or HER), so the water electrolysis reaction requires two different types of catalysts. This makes water electrolysis equipment more complex and increases operating costs. If catalysts with different functions are assembled into a hierarchical structure of heterojunction nanomaterials to construct a bifunctional total water splitting catalyst, the above problems can be effectively solved. Based on this, researchers from the Institute of Solid State Physics used a simple two-step hydrothermal method to assemble Ni3Se4 nanosheets with hydrogen evolution performance and NiFe with oxygen evolution performance into a heterogeneous total water splitting catalyst with a hierarchical structure. Due to the stable hierarchical structure and the electronic interaction between catalysts, this nanocatalyst has excellent total water splitting activity. When the current density of total water splitting is 10mA/cm2, the required voltage is only 1.54V, and when the current density is It works continuously for 100 hours at 10mA/cm2 without obvious attenuation, which proves its stability is very good. After studying the above, you can conclude that a low-cost, high-activity bifunctional catalyst has been developed. After reading this, do you have any inspiration? Hopefully this technology will bear further fruit.
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