退火对Ni MOF材料电解水析氢性能的研究

Study on Annealing Effect on Hydrogen Evolution from Electrolytic Water of Ni MOF Materials

摘要: 本文介绍了一种介孔结构的金属粒子催化剂。原始的Ni MOF材料孔隙是微孔，不利于传输过程中物质的渗透与传播，也不利于电荷的转移。煅烧以后，可以有效地解决在电催化过程中催化剂孔径是微孔这一问题。同时，选择适宜的温度进行煅烧，可以使颗粒适当团聚，同时把微孔扩大成介孔，从而使样品具有更高的比表面积，这有利于提高样品的催化活性。本文在1 M氢氧化钾碱性条件下，测试了样品的电催化析氢性能。在电流密度为10 mA∙cm−2时，HER的过电位为167 mV。同时，该样品具有超强的耐久性，在进行了1000圈CV循环后，样品的性能没有发生明显的改变。该实验为非贵金属基电催化剂材料提供了新的思路。

Abstract: In this paper, a mesoporous metal particle catalyst is introduced. The pores of the original Ni MOF material are micropores, which are not conducive to the penetration and propagation of materials in the transmission process, and are also not condu-cive to the transfer of charges. The calcination can effectively solve the problem that the catalyst is microporous in the electro-catalysis process. At the same time, calcination at a suitable tempera-ture can properly agglomerate particles, and expand micropores into mesopores, so that the sample has a higher specific surface area, which is conducive to improving the catalytic activity of the sam-ple. In this paper, the electrocatalytic hydrogen evolution performance of the samples was tested under the alkaline condition of 1 M potassium hydroxide. At a current density of 10 mA∙cm−2, the overpotential of the HER is 167 mV. At the same time, the sample has super durability, and its per-formance has not changed significantly after 1000 cycles of CV. This experiment provides a new idea for non-noble metal-based electrocatalyst materials.