Preparation of platinum based nanocatalysts and their recent progress in hydrogenation

doi:10.16085/j.issn.1000-6613.2022-1484

Abstract

Abstract:

Platinum based catalysts play an important role in many important liquid phase hydrogenation reactions. It is of great significance to develop catalysts with controllable size, crystal shape and morphology so as to provide high platinum utilization rate and good activity. The latest research progress of platinum based catalysts is systematically reviewed in this paper, including the synthesis methods of different platinum nanocatalysts, the types of reducing agents, and the influence of important factors (including particle size, morphology, composition and carrier) on the catalytic activity and selectivity of platinum-based catalysts. Despite of their high catalytic efficiency, Platinum-based catalytic materials are still very expensive, so further exploring the hydrogenation mechanism of platinum-based catalysts, increasing the catalyst life while reducing the cost and realizing their controllable preparation are still the key research directions in the future.

Key words: platinum-based catalyst, support, nanoparticles, hydrogenation, morphology, preparation methods

摘要：

铂基金属催化剂在许多重要的液相加氢化学转化中起着至关重要的作用，研究尺寸、晶型及形貌可控的催化剂以制备铂利用率高及活性好的催化剂具有重要意义。本文系统地介绍了铂基金属催化剂的研究进展，包括不同铂基金属纳米催化剂的合成方法、还原剂的种类以及影响铂基催化剂性能的重要因素(包括粒子粒径、形貌、组成、载体)对催化活性和选择性的影响。铂基催化材料催化效率高但价格昂贵，文中指出进一步探索铂基催化剂对加氢反应机理的影响机制，降低成本的同时提高催化剂寿命并实现铂基催化剂的可控制备仍是未来的重点研究方向。

关键词: 铂基催化剂, 载体, 纳米粒子, 加氢, 形貌, 制备方法

CLC Number:

TQ426

CHEN Yixin, ZHEN Yaoyao, CHEN Ruihao, WU Jiwei, PAN Limei, YAO Chong, LUO Jie, LU Chunshan, FENG Feng, WANG Qingtao, ZHANG Qunfeng, LI Xiaonian. Preparation of platinum based nanocatalysts and their recent progress in hydrogenation[J]. Chemical Industry and Engineering Progress, 2023, 42(6): 2904-2915.

陈怡欣, 甄摇摇, 陈瑞浩, 吴继伟, 潘丽美, 姚翀, 罗杰, 卢春山, 丰枫, 王清涛, 张群峰, 李小年. 铂基纳米催化剂的制备及在加氢领域的进展[J]. 化工进展, 2023, 42(6): 2904-2915.

Figures/Tables 12

References 68

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制备方法	优点	缺点
浸渍法、热还原法、液相还原法	反应条件一般较为简单，易于控制，适合大规模工业化生产	合成的Pt粒子分散性较差，粒径分布范围较广
溶胶-凝胶法	对设备要求低、均匀性好、颗粒细、纯度高、产物活性高	原料成本高、成形性能和烧结性差
微乳液法	操作方便、产物粒径小、均匀性好	产率低、成本较高
沉积沉淀法	可将纳米粒子负载在任何形状，如蜂窝状、粒状、片状等的载体上，纳米颗粒常位于载体表面，利于催化剂发挥其催化作用	易引入杂质，影响催化剂纯度，此法受反应溶液的浓度、pH和温度等制备条件影响较大，易导致催化剂粒度分布不均
原子层沉积法	参数高度可控，沉积均匀；制备的铂催化剂具有较好的抗烧结、抗积炭性能，具有自限性，可有效防止金属聚集，重复性好，可以实现Pt纳米粒子到单原子的制备	需要复杂且昂贵的设备，且制备过程中存在传质问题，工业化存在挑战
光化学法	制备的催化剂具有较强的金属-载体相互作用，具有较小的金属颗粒、较高的分散程度和电子云密度，对底物活化能力更强。此法操作简单、适于工业化应用	对载体有要求，还原过程所需时间较长
原位合成法	制备的纳米复合材料界面无污染、结合强度较高，省去了预处理工序，简化了制备工艺	合成体系有限、产物致密度不高

制备方法	优点	缺点
浸渍法、热还原法、液相还原法	反应条件一般较为简单，易于控制，适合大规模工业化生产	合成的Pt粒子分散性较差，粒径分布范围较广
溶胶-凝胶法	对设备要求低、均匀性好、颗粒细、纯度高、产物活性高	原料成本高、成形性能和烧结性差
微乳液法	操作方便、产物粒径小、均匀性好	产率低、成本较高
沉积沉淀法	可将纳米粒子负载在任何形状，如蜂窝状、粒状、片状等的载体上，纳米颗粒常位于载体表面，利于催化剂发挥其催化作用	易引入杂质，影响催化剂纯度，此法受反应溶液的浓度、pH和温度等制备条件影响较大，易导致催化剂粒度分布不均
原子层沉积法	参数高度可控，沉积均匀；制备的铂催化剂具有较好的抗烧结、抗积炭性能，具有自限性，可有效防止金属聚集，重复性好，可以实现Pt纳米粒子到单原子的制备	需要复杂且昂贵的设备，且制备过程中存在传质问题，工业化存在挑战
光化学法	制备的催化剂具有较强的金属-载体相互作用，具有较小的金属颗粒、较高的分散程度和电子云密度，对底物活化能力更强。此法操作简单、适于工业化应用	对载体有要求，还原过程所需时间较长
原位合成法	制备的纳米复合材料界面无污染、结合强度较高，省去了预处理工序，简化了制备工艺	合成体系有限、产物致密度不高

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