Robust Ni/ZrO2 Catalyst Prepared by Sol-Gel Method for Hydrogen Production from Ammonia Decomposition and Dry Reforming of Methane

文献类型： 外文期刊

第一作者： Deng, Hao

作者： Deng, Hao;Yan, Xiteng;Zhang, Rongbin;Feng, Gang;Ye, Runping;Wu, Juan;Zhou, Zhangfeng;Chen, Chongchong

作者机构：

关键词： Ammonia decomposition; Dry reforming of methane; Ni/ZrO2; Sol-gel

期刊名称：CHEMISTRYSELECT （ 影响因子：2.0； 五年影响因子：2.0 ）

ISSN： 2365-6549

年卷期： 2025 年 10 卷 21 期

页码：

收录情况： SCI

摘要： With the growing challenges of global energy demand and environmental protection, hydrogen production has emerged as a key research focus. A robust Ni/ZrO2 catalyst has demonstrated favorable catalytic activity and stability for hydrogen production via ammonia decomposition and dry reforming of methane (DRM) reactions at relatively low reaction temperatures. The reduced Ni/ZrO2 catalyst showed a mean ammonia conversion value of 72.9% at 600 degrees C and could be kept for over 60-h for ammonia decomposition reaction with a gas hourly space velocity (GHSV) of 20,000 mLg(-1)h(-1). In addition, the Ni/ZrO2 catalyst exhibited a mean CO2 conversion value of 85.1%, and H-2/CO ratio of 1.05 at 800 degrees C, and could be kept for 75-h for DRM reaction with a GHSV of 68,000 mLg(-1)h(-1). Structural characterization revealed that the phase transformation of ZrO2 from cubic to monoclinic contributed to the enhanced catalyst stability. Additionally, the mesoporous structure facilitated mass transfer, while the strong metal-support interactions suppressed Ni sintering. Notably, active carbon whiskers formed during DRM further stabilized the catalyst. These findings highlight the role of metal-support interactions and structural evolution in enhancing the catalytic performance and long-term stability of Ni/ZrO2, making it a promising candidate for high-temperature catalytic applications.

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