中学化学中的有一些实验需要使用催化剂,其中除了《氧气的制取》外,其他几个实验的难度较大,不易成功,而催化剂恰是这些实验的成败关键。现介绍几种催化剂的简易可行的制法: 一、《氨的合成》实验合成氨的实验可以采用以下几种催化剂: 1.用还原铁粉做催化剂。还原铁粉的催化效能较好,但由于还原铁粉易被氧化而失效,同时还原铁粉还会被杂质“中毒”。所以最好使用新制的还原铁粉,而且要净化参加反应的氧气和氮气。 2、用化肥厂的铁触媒做催化剂。铁触媒是以铁为主体的多成份催化剂,它是一种催化效能较高的催化剂。使用时,先将铁触媒敲碎,最好磨成细粉,然后用蒸馏水多次洗涤后,放在稀的氢氧化钠溶液中 Some experiments in middle school chemistry require the use of catalysts. In addition to “oxygen preparation,” several experiments are more difficult and unsuccessful, and catalysts are the key to the success of these experiments. Now introduce several simple and feasible catalyst preparation method: First, the “ammonia synthesis” experiment Synthesis of ammonia can use the following catalysts: 1. With reduced iron as a catalyst. Reduced iron catalytic performance is better, but due to the reduced iron oxide is easily oxidized and invalid, while reduced iron will be impurities “poisoning.” So it is best to use the new system of reduced iron, but also to participate in the purification of oxygen and nitrogen reaction. 2, with the iron fertilizer catalyst plant as a catalyst. Iron catalyst is an iron-based multi-component catalyst, which is a catalyst with high catalytic performance. Use, the first iron catalyst cracked, the best ground into fine powder, and then washed with distilled water after multiple, placed in dilute sodium hydroxide solution