
Citation: Yan Zhang, Yuan Lyu, Yuqing Wang, Cunyao Li, Miao Jiang, Yunjie Ding. Highly active and stable porous polymer heterogenous catalysts for decomposition of formic acid to produce H2[J]. Chinese Journal of Catalysis, 2019, 40(2): 147-151. doi: S1872-2067(19)63275-4

多孔聚合物催化剂高效催化甲酸分解制氢
首先,对制备的催化剂进行了一系列表征.通过13C和31P固体核磁谱图证实了催化剂的结构;热重分析结果显示催化剂的分解温度高于400℃,表明此催化剂具有优良的热稳定性;N2物理吸附结果表明该催化剂具有非常高的比表面积和丰富的孔道结构;原位一氧化碳吸附红外光谱结果表明聚合物配体对中心金属离子的电子态具有重要影响.随后,对制备的催化剂进行了活性评价实验.结果显示,Ru@POPs-PPh3及Ru@POPs-TPP催化剂均能催化甲酸分解脱氢,并通过热过滤实验证明催化过程是多相催化过程.使用前后催化剂的透射电子显微镜表征显示,使用前Ru@POPs-PPh3及Ru@POPs-TPP催化剂上均未发现Ru纳米粒子,在使用后的Ru@POPs-TPP催化剂上发现了Ru纳米颗粒,而Ru@POPs-PPh3上的Ru仍然是高分散状态,没有团聚成纳米颗粒,表明Ru@POPs-PPh3具有更高的稳定性.对Ru@POPs-PPh3催化剂的进一步研究发现,在三乙胺参与下,140℃条件下,其催化甲酸分解脱氢的TOF值可达55855h-1,该催化活性可与均相催化剂相媲美;稳定性实验结果表明该催化剂具有非常高的稳定性,能够连续使用5次而活性没有明显降低.催化剂的高活性和稳定性归因于特定的聚合物配体,以及载体的高比表面积和高的膦配体浓度.本工作可为甲酸分解催化剂的设计提供带来启发.
English
Highly active and stable porous polymer heterogenous catalysts for decomposition of formic acid to produce H2
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Key words:
- Heterogeneous
- / Porous organic polymer
- / Formic acid
- / Decomposition
- / Hydrogen
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