Essential Role of Ru-Anion Interaction in Ru-Based Ammonia Synthesis Catalysts
文献类型：期刊论文
| 作者 | Y., Zhou; X., Peng; T., Zhang; H., Cai; B., Lin; L., Zheng; X., Wang; L., Jiang |
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2022 |
| 卷号 | 12期号:13页码:7633-7642 |
| DOI | 10.1021/acscatal.2c01486 |
| 文献子类 | Article |
| 英文摘要 | The metal-anion interaction (MAI) widely exists over supported metal catalysts, which has a significant effect on tuning metal sites and reaction performance. However, the effect of MAI on NH3synthesis and the reaction mechanism is still elusive. Here, we report that the strength of Ru-anion interaction gradually increases from Ru-N to Ru-H and Ru-O when the anion of the support is changed from H (ZrH2) to N (ZrN) and O (ZrO2). Moreover, the Ru-anion interaction induced by different support compositions can affect the hydrogen spillover and N2activation route. Due to the weak Ru-N interaction, the aggregation of Ru particles is observed over Ru/ZrN. Although Ru particles are highly dispersed over ZrO2owing to the strong Ru-O interaction, hydrogen poisoning is inevitable over Ru/ZrO2. Comparatively, hydrogen poisoning can be alleviated over Ru/ZrH2via hydrogen spillover to its support. The results of NEXAFS, in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), and isotope-labeling experiments show that N2can be activated via both dissociative and associative routes over Ru/ZrH2. Consequently, the developed Ba-promoted Ru/ZrH2catalyst displays a high NH3synthesis rate of 27.5 mmol g-1h-1and robust stability during 300 h time-on-stream at 400 °C and 1 MPa. © 2022 American Chemical Society. All rights reserved. |
| 电子版国际标准刊号 | 2155-5435 |
| 语种 | 英语 |
| WOS记录号 | WOS:000819475000001 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/299079]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Y., Zhou,X., Peng,T., Zhang,et al. Essential Role of Ru-Anion Interaction in Ru-Based Ammonia Synthesis Catalysts[J]. ACS CATALYSIS,2022,12(13):7633-7642. |
| APA | Y., Zhou.,X., Peng.,T., Zhang.,H., Cai.,B., Lin.,...&L., Jiang.(2022).Essential Role of Ru-Anion Interaction in Ru-Based Ammonia Synthesis Catalysts.ACS CATALYSIS,12(13),7633-7642. |
| MLA | Y., Zhou,et al."Essential Role of Ru-Anion Interaction in Ru-Based Ammonia Synthesis Catalysts".ACS CATALYSIS 12.13(2022):7633-7642. |
入库方式： OAI收割
来源：高能物理研究所
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