Geon-Hyeong Lee , Hyeon-Seok Kang , Jung-Hoon Lee , Dong-Seong Kim , Dae-Woon Jeong , Hyun-Seog Roh , Yeol-Lim Lee
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引用次数: 0
Abstract
Ni-Ce0.8Zr0.2O2 catalysts were synthesized via co-precipitation by varying the precipitant dropwise addition time (0, 5, 10, 20 min) to control nucleation and growth dynamics. This parameter critically influences the physicochemical properties of the catalysts, particularly the oxygen storage capacity (OSC) and Ni dispersion. Rapid dropwise addition (0, 5 min) resulted in insufficient lattice distortion, yielding fewer oxygen vacancies and lower oxygen storage capacity. Conversely, overly slow dropwise addition (20 min) led to excessive Ce3 + migration, promoting the Ce covering effect and suppressing Ni0 dispersion. An optimal dropwise addition time (10 min) revealed balanced characteristics with high OSC and superior Ni0 dispersion, leading to improved catalytic activity and stability in the dry reforming of methane. These findings demonstrate that fine-tuning of precipitation kinetics is crucial for optimizing Ce-Ni interfacial phenomena and maximizing catalytic performance.
期刊介绍:
Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications.
Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.