负载型甲酸脱氢Ag-Pd催化剂性能研究

发布时间：2018-05-11 09:21

本文选题：储氢 + 甲酸　；参考：《安徽工业大学》2016年硕士论文

【摘要】：当前,能源危机日益严峻,特别是随着化石燃料的大量使用,带来一系列环境污染问题,迫使人们寻找可再生、清洁能源。在众多的替代能源中,氢气是最洁净、高效的能量载体。氢气在质子交换膜燃料电池中有着广泛应用,副产物仅有水,对环境无污染。但是,寻找高效、安全的储氢材料是氢能大规模利用的最大的挑战之一。甲酸以其性质稳定、储氢能量密度高且无毒的特点,引起了人们广泛的关注。本工作首次通过简单的共还原法,成功将双金属Ag Pd纳米颗粒固定在石墨相氮化碳(g-C3N4)改性的SBA-15载体上。得到的催化剂用于甲酸分解脱氢研究。甲酸脱氢的效率取决于催化剂中Ag Pd比例及g-C3N4的改性用量。对各组合的催化剂Ag Pd/m CND@SBA-15进行测试,Ag10Pd90/0.2CND@SBA-15表现出了最佳的催化甲酸脱氢性能。在323 K下,脱氢反应的选择性达100%,TOF达893 h-1。本工作首次通过简单的共还原法,成功将各种摩尔比的双金属Ag Pd纳米颗粒固定在石墨相氮化碳(g-C3N4)上,用于催化甲酸脱氢研究。使用转化频率(TOF)来表示各组分催化剂的催化性能。对各组合的催化剂Ag Pd/g-C3N4进行测试,Ag10Pd90/g-C3N4表现出了最高的催化甲酸脱氢活性。在323 K下,脱氢反应的选择性达100%,TOF达480 h-1。所制备的催化在推动甲酸作为储氢材料的应用的过程中展现了一定的潜力。
[Abstract]:At present, the energy crisis is becoming more and more serious, especially with the extensive use of fossil fuels, which brings a series of environmental pollution problems, forcing people to look for renewable and clean energy. Among the many alternative energy sources, hydrogen is the cleanest and most efficient energy carrier. Hydrogen is widely used in proton exchange membrane fuel cells (PEMFC). However, finding efficient and safe hydrogen storage materials is one of the biggest challenges for the large-scale utilization of hydrogen energy. Formic acid has attracted wide attention due to its stable properties, high energy density and nontoxic hydrogen storage. In this work, the bimetallic Ag PD nanoparticles were successfully immobilized on the SBA-15 support modified by graphite phase carbon nitride by a simple co-reduction method. The obtained catalyst was used in the dehydrogenation of formic acid. The efficiency of formic acid dehydrogenation depends on the ratio of Ag PD in the catalyst and the amount of g-C3N4 modified. Ag10Pd90 / 0.2 CNDSBA-15 showed the best catalytic activity for the dehydrogenation of formic acid. At 323 K, the selectivity of dehydrogenation is 100% and the TOF is 893 h ~ (-1). In this work, for the first time, various molar ratios of bimetallic Ag PD nanoparticles were successfully immobilized on graphite-phase carbon nitride (C _ 3N _ 3N _ 4) by a simple co-reduction method to study the catalytic dehydrogenation of formic acid. The conversion frequency (TOF) is used to express the catalytic performance of each component catalyst. Ag10Pd90 / g-C3N4 showed the highest catalytic activity for the dehydrogenation of formic acid. At 323 K, the selectivity of dehydrogenation is 100% and the TOF is 480 h ~ (-1). The catalyst showed potential in promoting the application of formic acid as hydrogen storage material.
【学位授予单位】：安徽工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：O643.36

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