首页|Boosting hydrogen production of ammonia decomposition via the construction of metal-oxide interfaces

Boosting hydrogen production of ammonia decomposition via the construction of metal-oxide interfaces

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The ammonia decomposition for the production of carbon-free hydrogen has triggered great attention yet still remains challenging due to its sluggish kinetics,posting the importance of precise design of efficient catalysts for ammonia decomposition under low temperatures.Constructing the metal-support interaction and interface is one of the most important strategies for promoting catalysts.In this work,by coating ceria onto the Ni nanoparticles(NPs),we discover that the Ni-CeO2 interfaces create an exceptional effect to enhance the catalytic decomposition of ammonia by over 10 folds,compared with the pristine Ni.The kinetic analysis demonstrates that the recombinative N2 desorption is the rate-determining step(RDS)and the Ni-CeO2 interface greatly increases the RDS.Based on these understandings,a strategy to fabricate the Ni/CeO2 catalyst with abundant Ni-Ce-O in-terfaces via one-pot sol-gel method was employed(hereafter denoted to s-Ni/CeC2).The s-Ni/CeO2 catalyst shows a high activity for ammonia decomposition,achieving a H2 formation rate of 10.5 mmol gcat1 min-1 at 550 ℃.Combined with a series of characterizations,the relationship between the catalyst structure and the performance was investigated for further understanding the effect of metal-oxide interfaces.

Metal-support interactionAmmonia decompositionNickelCerium oxideMetal-oxide interfaces

Jiangping Chen、Hongju Ren、Kai Wu、Huihuang Fang、Chongqi Chen、Li Lin、Yu Luo、Lilong Jiang

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National Engineering Research Center for Chemical Fertilizer Catalyst(NERC-CFC),School of Chemical Engineering,Fuzhou University,Fuzhou,350002,China

Qingyuan Innovation Laboratory,Quanzhou,Fujian,362801,China

国家重点研发计划国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金创新研究群体项目福建省自然科学基金Talent Program of Fuzhou University

2022YFB40024012022YFB40037012217805822308055222210052022J05027XRC-22036

2024

10.1016/j.cjsc.2024.100236

结构化学
中国化学会 中国科学院福建物质结构研究所

结构化学

影响因子：0.44
ISSN：0254-5861
年,卷(期)：2024.43(2)
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