Yakoumis Iakovos, Polyzou Εkaterini, Moschovi Anastasia Maria
MONOLITHOS Catalysts & Recycling Ltd., 11476 Athens, Greece.
Materials (Basel). 2021 Apr 26;14(9):2226. doi: 10.3390/ma14092226.
PROMETHEUS catalyst, a copper-based polymetallic nano-catalyst has been proven to be suitable for automotive emission control applications. This novel catalyst consists of copper, palladium and rhodium nanoparticles as active phases, impregnated on an inorganic oxide substrate, CeO/ZrO (75%, 25%). The aim of PROMETHEUS catalyst's development is the substitution of a significant amount (85%) of Platinum Group Metals (PGMs) with copper nanoparticles while, at the same time, presenting high catalytic efficiency with respect to the commercial catalysts. In this work, an extensive investigation of the catalytic activity of full scale PROMETHEUS fresh and aged catalyst deposited on ceramic cordierites is presented and discussed. The catalytic activity was tested on an Synthetic Gas Bench (SGB) towards the oxidation of CO and CH and the reduction of NO. The loading of the washcoat was 2 wt% (metal content) on Cu, Pd, Rh with the corresponding metal ratio at 21:7:1. The concentration of the full-scale monolithic catalysts to be 0.032% total PGM loading for meeting Euro III standard and 0.089% for meeting Euro IV to Euro VIb standards. The catalytic activity of all catalysts was tested both in rich-burn (λ = 0.99) and lean-burn conditions (λ = 1.03).
普罗米修斯催化剂是一种铜基多金属纳米催化剂，已被证明适用于汽车尾气排放控制应用。这种新型催化剂由铜、钯和铑纳米颗粒作为活性相，负载在无机氧化物载体CeO/ZrO（75%，25%）上。开发普罗米修斯催化剂的目的是用铜纳米颗粒替代大量（85%）的铂族金属（PGM），同时相对于商业催化剂具有高催化效率。在这项工作中，对沉积在陶瓷堇青石上的全尺寸普罗米修斯新鲜和老化催化剂的催化活性进行了广泛研究并进行了讨论。在合成气试验台（SGB）上测试了其对CO和CH氧化以及NO还原的催化活性。涂层负载量为Cu、Pd、Rh上的2 wt%（金属含量），相应的金属比例为21:7:1。全尺寸整体式催化剂的浓度为满足欧III标准时总PGM负载量为0.032%，满足欧IV至欧VIb标准时为0.089%。所有催化剂的催化活性均在富燃（λ = 0.99）和贫燃条件（λ = 1.03）下进行了测试。
