中国科学院过程所刘瑞霞团队报道了正丁烷选择性氧化钒磷氧化物催化剂的微波合成。相关研究成果发表在2024年10月29日出版的《颗粒学报》。

钒磷氧化物（VPO）催化剂在正丁烷选择性氧化为马来酸酐（MA）中起着至关重要的作用，其催化性能在很大程度上取决于前驱体的合成条件。

该研究重点研究了一种简单快速的微波辐射方法来合成VPO前体。研究了微波暴露时间和功率对VPO形貌、晶体结构和催化效果的影响。通过SEM、TEM、BET、FT-IR、XRD、拉曼和XPS表征探索了催化剂的结构和性能之间的关系。结果表明，微波功率是影响焦磷酸钒活化后尺寸、厚度、表面积和活性表面的关键因素。

此外，催化剂表面的P/V比和Lat-O/Sur-O比因不同的合成条件而异，这显著影响了催化性能。综上所述，微波合成的VPO催化剂在正丁烷转化率（87.2%）和马来酸酐（MA）选择性（70.2%）方面表现出显著的提高，显示出高效节能的特点，为未来VPO催化剂的制备提供了新的研究方向。

附：英文原文

Title: Microwave synthesis of vanadium phosphorus oxide catalysts for n-butane selective oxidation

Author: Ruirui Zhang a b, Ruixia Liu a b

Issue&Volume: 2024/10/29

Abstract: Vanadium phosphorus oxide (VPO) catalysts play a crucial role in in the selective oxidation of n-butane to maleic anhydride (MA), and their catalytic performance is highly dependent on the synthesis conditions of the precursor. This study focuses on a facile and rapid microwave irradiation method for the synthesis of VPO precursors. The effects of microwave exposure time and power on morphology, crystalline structure, and catalytic effect of VPO are investigated. The relationship between the structure and performance of the catalysts is explored by SEM, TEM, BET, FT-IR, XRD, Raman, and XPS characterization. The results demonstrate that microwave power is the key factor influencing the size, thickness, surface area, and active surfaces of vanadium pyrophosphate after activation. Additionally, the P/V ratio and Lat-O/Sur-O ratio on the catalyst surface vary with different synthesis conditions, which significantly affect the catalytic performance. In conclusion, the microwave-synthesized VPO catalyst exhibits remarkable enhancements in n-butane conversion (87.2%) and maleic anhydride (MA) selectivity (70.2%), which shows high efficiency and energy-saving, providing a new research direction for the future preparation of VPO catalysts.

DOI: 10.1016/j.partic.2024.10.012

Source: https://www.sciencedirect.com/science/article/abs/pii/S1674200124002128