掺杂水平、组成、温度和微观结构对水气倒转反应中铁和钴催化剂的影响

IF 7.9 3区 材料科学 Q1 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
Shailza Saini, Harley Makepeace, Nathaniel Allen, Qiong Cai, Kalliopi Kousi
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引用次数: 0

摘要

Exsolution最近被证明是设计高稳定性和活性催化剂的最有效策略之一,可以精确控制纳米颗粒的大小、组成、结构和形态。这种方法在二氧化碳利用方面获得了极大的关注,特别是在逆向水气转换(rWGS)反应中。然而,外溶催化剂的效率受多种因素的影响,这些因素会影响纳米颗粒的形成、分布和稳定性。为了全面了解这些不同的参数是如何在脱溶催化剂中相互作用的,本研究系统地研究了掺杂水平、组成、还原温度和材料微观结构对钙钛矿材料中铁和钴纳米颗粒脱溶的影响,并评估了它们在rWGS反应中的催化性能。我们的发现强调了微观结构细化、掺杂化学和预处理条件在优化溶出行为和催化性能中的关键作用。这项工作为建立一个标准化框架提供了宝贵的见解,为合理设计高效和稳定的下一代CO2利用的溶解催化剂提供了宝贵的见解,但也有望影响许多其他应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Impact of dopant levels, composition, temperature, and microstructure on exsolved iron and cobalt catalysts for the reverse water-gas shift reaction

Impact of dopant levels, composition, temperature, and microstructure on exsolved iron and cobalt catalysts for the reverse water-gas shift reaction
Exsolution has been recently demonstrated as one of the most effective strategies for designing highly stable and active catalysts, offering precise control over nanoparticle size, composition, structure, and morphology. This approach has gained significant attention for CO2 utilisation, particularly in the reverse water-gas shift (rWGS) reaction. However, the efficiency of exsolved catalysts is governed by multiple factors that influence nanoparticle formation, distribution, and stability. To gain a comprehensive understanding of how these various parameters interplay in exsolved catalysts, this study systematically investigates the impact of dopant levels, composition, reduction temperature, and material microstructure on the exsolution of iron and cobalt nanoparticles from perovskite materials and assesses their catalytic performance in the rWGS reaction. Our findings highlight the critical role of microstructure refinement, dopant chemistry, and pre-treatment conditions in optimising exsolution behaviour and catalytic performance. This work offers valuable insights toward establishing a standardised framework for the rational design of efficient and stable next-generation exsolved catalysts for CO2 utilisation but is also expected to impact many other applications.
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来源期刊
CiteScore
5.80
自引率
6.40%
发文量
174
审稿时长
32 days
期刊介绍: Materials Today Sustainability is a multi-disciplinary journal covering all aspects of sustainability through materials science. With a rapidly increasing population with growing demands, materials science has emerged as a critical discipline toward protecting of the environment and ensuring the long term survival of future generations.
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