等离子体催化CO2甲烷化过程中,双金属镍铁矿结构对协同效应的影响

IF 4.2 3区 化学 Q2 CHEMISTRY, PHYSICAL
Ahmad Z. Md Azmi, Rachelle Tay, Jiajia Zhao, Christopher D. Easton, Aaron Seeber, Yunxia Yang, Anthony B. Murphy, Emma Lovell and Jason Scott
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引用次数: 0

摘要

等离子体存在下的催化CO2甲烷化具有重要的工业意义,因为它具有较低的温度要求和电气化能力。推进催化剂设计对于提高等离子体催化甲烷化工业应用的可行性至关重要。在等离子体催化系统中利用双金属催化剂协同作用的潜力是存在的,尽管对这一领域的了解仍然有限。在这里,使用了两种不同的合成方法,湿共浸渍(WI)和共沉积沉淀(DP),将双金属Ni-Fe加载到γ-Al2O3载体上,从而使催化剂沉积物中的Ni-Fe结构被调节为:(i)分离的janus状;(ii)铁饰镍;(iii) fe包覆Ni。发现铁和镍之间的相互作用程度会影响矿床内镍的性质,如果足够,则会产生协同作用。Ni - Fe之间更紧密的接触或足够大的Fe存在(在10%Ni WI和10%Fe WI中观察到),证明了沉积物中Ni(OH)2的比例增加,使甲烷产量提高了78%(相对于10%Ni WI)。在铁过度修饰或包裹镍矿床的情况下(在10%Ni DP和10%Fe DP中观察到),双金属亲密性的好处就失去了(与10% ni3 Fe DP相比,甲烷产量降低了90%)。这项研究强调了金属-金属相互作用在控制催化剂性能中的关键作用。Ni-Fe协同作用在热催化和等离子体催化环境之间是可转换的,强调了将双金属催化剂的优势应用于等离子体催化系统的潜力。本研究结果将有助于催化剂向实际工业应用的发展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

The impact bimetallic Ni–Fe deposit configuration has on accessing synergy during plasma-catalytic CO2 methanation†

The impact bimetallic Ni–Fe deposit configuration has on accessing synergy during plasma-catalytic CO2 methanation†

Catalytic CO2 methanation in the presence of plasma is of significant industrial interest due to the lower temperature requirements and capacity for electrification. Advancing catalyst design is crucial for improving the feasibility of plasma-catalytic methanation for industrial applications. The potential for harnessing bimetallic catalyst synergies within the plasma-catalytic system exists although understanding in this area remains limited. Here, two distinct synthesis methods were used, wet co-impregnation (WI) and co-deposition precipitation (DP) to load bimetallic Ni–Fe on a γ-Al2O3 support such that the Ni–Fe configuration within the catalyst deposits was regulated to be: (i) segregated Janus-like; (ii) Fe-decorated Ni; and (iii) Fe-encapsulated Ni. The extent of interaction between the Fe and Ni was found to influence the nature of the Ni species within the deposit which, if sufficient, invoked a synergy. More intimate contact between the Ni–Fe or a sufficiently large Fe presence (observed in 10%Ni WI and 10%Fe WI), evidenced by the increase in the fraction of Ni(OH)2 in the deposits, boosted methane productivity by 78% (relative to 10%Ni WI). In the instance where Fe excessively decorated or encapsulated the Ni deposits (observed in the 10%Ni DP and 10%Fe DP) the benefit of bimetallic intimacy was lost (a 90% reduction in methane productivity relative to 10%Ni3%Fe DP). This study highlights the critical role of metal–metal interactions in controlling catalyst performance. The Ni–Fe synergy was found to be translatable between thermal-catalytic and plasma-catalytic environments, underscoring the potential for adapting the benefits of bimetallic catalysts to plasma catalytic systems. The findings from this study will contribute to the development of catalysts toward practical industrial applications.

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来源期刊
Catalysis Science & Technology
Catalysis Science & Technology CHEMISTRY, PHYSICAL-
CiteScore
8.70
自引率
6.00%
发文量
587
审稿时长
1.5 months
期刊介绍: A multidisciplinary journal focusing on cutting edge research across all fundamental science and technological aspects of catalysis. Editor-in-chief: Bert Weckhuysen Impact factor: 5.0 Time to first decision (peer reviewed only): 31 days
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