近日，北京大学马丁团队实现了钠促进Pt/γ-Mo₂N催化乙二醇水蒸气重整高效制氢。该项研究成果发表在2025年9月3日出版的《美国化学会志》上。

从生物质和塑料废物中提取的乙二醇（EG）可以通过蒸汽重整(HOCH₂CH₂OH + 2H₂O = 5H₂ + 2CO₂)实现，然而，如何在温和条件下实现高活性的产氢和对CO₂的良好选择性是一个挑战。对加速C-C键而不是C-O键的裂解和水分子活化的活性位点的深入了解仍然缺乏。

在这项研究中，研究组开发了一种PtNa/γ-Mo₂N催化剂，可以有效地实现乙二醇蒸汽重整（EGSR）反应的制氢。该催化剂具有优异的H₂产率，在250℃、10 bar条件下可达到6000 mol_H2·mol_Pt^-1·h^-1，在含碳产物中具有高的CO₂选择性（89%）和低的CO选择性（1%）。

综合表征揭示了高度分散的Pt和Mo₂N之间的界面在活化乙二醇和水方面的关键作用。此外，钠（Na）被发现阻断酸性位点，防止C-O键裂解产生副产物，并调节Pt位点，通过加速水气转移反应加速重整过程。

附：英文原文

Title: Efficient Hydrogen Production from Ethylene Glycol Steam Reforming Catalyzed by Na-Promoted Pt/γ-Mo2N

Author: Xuan Liang, Zirui Gao, Xingjie Peng, Maolin Wang, Yao Xu, Jie Zhang, Shuheng Tian, Chengyu Li, Xuetao Qin, Rongli Mi, Zhaohua Wang, Wu Zhou, Meng Wang, Ding Ma

Issue&Volume: September 3, 2025

Abstract: Ethylene glycol (EG) derived from biomass and plastic wastes can serve as a sustainable H2 resource through steam reforming (HOCH2CH2OH + 2H2O 5H2 + 2CO2). However, achieving high activity in H2 production with good selectivity toward CO2 under mild conditions poses a challenge. A thoughtful understanding of the active sites that accelerate the cleavage of the C–C bond rather than the C–O bond and the activation of the water molecule is still lacking. In this study, we developed a PtNa/γ-Mo2N catalyst that efficiently enables hydrogen production from ethylene glycol steam reforming (EGSR) reactions. This catalyst achieved outstanding H2 productivity, reaching 6000 molH2·molPt–1·h–1 at 250 °C under 10 bar with high CO2 selectivity (89%) and low CO selectivity (1%) in carbon-containing products. Comprehensive characterizations revealed the crucial role of the interface between highly dispersed Pt species and Mo2N in activating ethylene glycol and water. Additionally, sodium (Na) was found to block acidic sites, preventing the formation of side products from C–O bond cleavage, and to modulate Pt sites, enhancing the reforming process by accelerating the water gas shift reaction.

DOI: 10.1021/jacs.5c04401

Source: https://pubs.acs.org/doi/abs/10.1021/jacs.5c04401