Tuning the Interaction Between Ru Nanoparticles and Nd2O3 to Enhance Hydrogen Formation from Ammonia Decomposition

IF 2.8 3区 化学 Q2 CHEMISTRY, APPLIED Topics in Catalysis Pub Date : 2024-03-28 DOI:10.1007/s11244-024-01926-8
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Abstract

Development of highly active and stable catalysts for production of COx-free hydrogen from ammonia is crucial for the use of ammonia as hydrogen carrier. Herein, Ru nanoparticles (NPs) on Nd2O3 (Ru/Nd2O3) was prepared by different methods and investigated for NH3 decomposition reaction. The dependence of the catalytic activity of Ru NPs on the Nd2O3 on the interaction between Ru NPs and Nd2O3 support was investigated in detail. The Ru/Nd2O3 obtained from precipitation method exhibits a high hydrogen formation rate of 1548 mmol gcat−1 h−1 at 450 °C, which is high than that of the Ru/Nd2O3 analogue from milling method and comparable with many efficient oxides supported Ru catalysts reported previously. As revealed by various characterization techniques, the high activity of Ru/Nd2O3 obtained from precipitation method can be attributed to the enhanced interaction between Ru NPs and Nd2O3. The Ru NPs in Ru/Nd2O3 analogue with enhanced the metal-support interaction can modulate electronic structure and facilitate the activation and decomposition of NH3. Therefore, Ru/Nd2O3 obtained from precipitation method exhibited significantly improved activity and intrinsic activity for NH3 decomposition. This study provides promise for the design of efficient Ru/Nd2O3 catalyst for NH3 decomposition reaction by tuning the metal–support interaction of catalysts.

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调节 Ru 纳米粒子与 Nd2O3 之间的相互作用以增强氨分解产生的氢气
摘要 开发高活性、高稳定性的催化剂,从氨气中制取不含 COx 的氢气,对于使用氨气作为氢气载体至关重要。本文采用不同方法制备了钕氧化物上的 Ru 纳米粒子(NPs),并研究了其在 NH3 分解反应中的应用。研究人员详细探讨了 Ru NPs 在 Nd2O3 上的催化活性取决于 Ru NPs 与 Nd2O3 支持物之间的相互作用。沉淀法得到的 Ru/Nd2O3 在 450 ℃ 时的氢气形成率高达 1548 mmol gcat-1 h-1,高于研磨法得到的 Ru/Nd2O3 类似物,与之前报道的许多高效氧化物支撑的 Ru 催化剂相当。各种表征技术表明,沉淀法获得的 Ru/Nd2O3 的高活性可归因于 Ru NPs 与 Nd2O3 之间相互作用的增强。Ru/Nd2O3 类似物中的 Ru NPs 增强了金属与支撑物之间的相互作用,可以调节电子结构,促进 NH3 的活化和分解。因此,沉淀法获得的 Ru/Nd2O3 在分解 NH3 方面的活性和本征活性都有显著提高。这项研究为通过调整催化剂的金属-支撑相互作用来设计用于 NH3 分解反应的高效 Ru/Nd2O3 催化剂提供了希望。
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来源期刊
Topics in Catalysis
Topics in Catalysis 化学-物理化学
CiteScore
5.70
自引率
5.60%
发文量
197
审稿时长
2 months
期刊介绍: Topics in Catalysis publishes topical collections in all fields of catalysis which are composed only of invited articles from leading authors. The journal documents today’s emerging and critical trends in all branches of catalysis. Each themed issue is organized by renowned Guest Editors in collaboration with the Editors-in-Chief. Proposals for new topics are welcome and should be submitted directly to the Editors-in-Chief. The publication of individual uninvited original research articles can be sent to our sister journal Catalysis Letters. This journal aims for rapid publication of high-impact original research articles in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
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