镍基硫族纳米材料的制备、表征及其电催化产氢应用

发布时间：2018-04-22 20:41

本文选题：纳米材料 + 电分解水　；参考：《西华师范大学》2016年硕士论文

【摘要】：本论文主要围绕基于镍的硫族化合物纳米功能材料的制备、表征、以及探究其在电催化析氢方面的应用。取得的主要研究成果如下:1、通过两步法反应成功制备了二硫化镍纳米阵列电极,并首次当作一个三维的析氢电极探究其在碱性和中性中的催化性能。此三维自支撑电极在中性电解液中展现出优秀的电催化效果,当电流密度达到2和10毫安每平方厘米时,过电势分别为193和243毫伏。同时该三维电极对碱性电解液也同样具有高效的电催化产氢性能。2、第一次在导电基底泡沫镍上通过水热加硫源和镍盐一步法生长二硫化三镍纳米片薄膜电极并探究其在中性电解液中的电催化产氢的性能。此三维电极是一个廉价的,高效的且稳定的阴极析氢电极。在中性电解液中,当电流密度达到10和100毫安每平方厘米时,过电势分别为220和396毫伏。在碱性电解液中,当电流密度达到10和100毫安每平方厘米时,过电势分别为123和260毫伏。3、通过溶剂热阴离子交换法首次在导电基底碳纤维布上合成二硒化镍纳米片阵列,并研究其在酸性电解液中的电催化分解水的性能,该电极表现出卓越的催化活性以及优秀的稳定性。在酸性电解液中,当电流密度达到10和100毫安每平方厘米时,需要的过电势分别为145和183毫伏。4、首次报道了利用硒氢化钠溶液作为硒源在泡沫镍上原位生长出硒化镍的纳米线薄膜并当做一个三维的双功能电极。我们对催化剂的结构进行了系统的表征以及研究了其催化析氧和析氢的性能。在两电极池中达到电流密度为10毫安每平方厘米时需要过电位为1.63伏特。
[Abstract]:This thesis focuses on the preparation, characterization and application of nickel-based sulfur-based nano-functional materials in electrocatalytic hydrogen evolution. The main research results are as follows: 1. Nickel disulfide nanoarray electrode was successfully prepared by two-step reaction and used as a three-dimensional hydrogen evolution electrode for the first time to investigate its catalytic performance in alkaline and neutral systems. The three dimensional self-supporting electrode exhibits excellent electrocatalytic effect in neutral electrolyte. When the current density reaches 2 Ma and 10 Ma per square centimeter, the overpotential is 193 MV and 243 MV, respectively. At the same time, the three dimensional electrode has the same high performance in electrocatalytic hydrogen production of alkaline electrolyte. It is the first time to grow nickel trisulfide nanocrystalline film electrode by hydrothermal sulfur source and nickel salt on conductive substrate foamed nickel. The electrocatalytic hydrogen production in neutral electrolyte was investigated. This three-dimensional electrode is a cheap, efficient and stable cathode hydrogen evolution electrode. In neutral electrolyte, when the current density reaches 10 Ma and 100 Ma per square centimeter, the overpotential is 220 and 396 millivolts, respectively. In alkaline electrolyte, when the current density reaches 10 Ma and 100 Ma per square centimeter, the overpotential is 123 and 260 MV 路3 respectively. The nickel diselenide nanocrystalline array was synthesized by solvothermal anion exchange method on the conductive substrate carbon fiber cloth for the first time. The electrocatalytic decomposition of water in acidic electrolyte was studied. The electrode showed excellent catalytic activity and excellent stability. In acidic electrolytes, when the current density reaches 10 and 100 Ma per square centimeter, The required superpotential is 145 and 183 MV 路4, respectively. It is the first time that nanowire thin films of nickel selenide were grown on foamed nickel by using sodium selenohydride solution as a selenium source and used as a three dimensional bifunctional electrode. The structure of the catalyst was systematically characterized and its catalytic properties of oxygen evolution and hydrogen evolution were studied. An overpotential of 1.63 volts is required for a current density of 10 Ma per square centimeter in two electrode cells.
【学位授予单位】：西华师范大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：O643.36;TQ116.2

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