Tsiotsias Anastasios I, Charisiou Nikolaos D, Yentekakis Ioannis V, Goula Maria A
Laboratory of Alternative Fuels and Environmental Catalysis (LAFEC), Department of Chemical Engineering, University of Western Macedonia, GR-50100 Koila, Greece.
Laboratory of Physical Chemistry & Chemical Processes, School of Environmental Engineering, Technical University of Crete, GR-73100 Chania, Greece.
Nanomaterials (Basel). 2020 Dec 24;11(1):28. doi: 10.3390/nano11010028.
CO methanation has recently emerged as a process that targets the reduction in anthropogenic CO emissions, via the conversion of CO captured from point and mobile sources, as well as H produced from renewables into CH. Ni, among the early transition metals, as well as Ru and Rh, among the noble metals, have been known to be among the most active methanation catalysts, with Ni being favoured due to its low cost and high natural abundance. However, insufficient low-temperature activity, low dispersion and reducibility, as well as nanoparticle sintering are some of the main drawbacks when using Ni-based catalysts. Such problems can be partly overcome via the introduction of a second transition metal (e.g., Fe, Co) or a noble metal (e.g., Ru, Rh, Pt, Pd and Re) in Ni-based catalysts. Through Ni-M alloy formation, or the intricate synergy between two adjacent metallic phases, new high-performing and low-cost methanation catalysts can be obtained. This review summarizes and critically discusses recent progress made in the field of bimetallic Ni-M (M = Fe, Co, Cu, Ru, Rh, Pt, Pd, Re)-based catalyst development for the CO methanation reaction.
近年来，一氧化碳甲烷化已成为一种旨在减少人为一氧化碳排放的工艺，该工艺通过将从固定源和移动源捕获的一氧化碳以及可再生能源产生的氢气转化为甲烷来实现。在早期过渡金属中，镍以及贵金属中的钌和铑，已知是最具活性的甲烷化催化剂，由于镍成本低且天然丰度高，因而受到青睐。然而，使用镍基催化剂时，低温活性不足、分散性和还原性低以及纳米颗粒烧结是一些主要缺点。通过在镍基催化剂中引入第二种过渡金属（例如铁、钴）或贵金属（例如钌、铑、铂、钯和铼），这些问题可以得到部分克服。通过形成镍 - M合金，或两个相邻金属相之间的复杂协同作用，可以获得新型高性能且低成本的甲烷化催化剂。本综述总结并批判性地讨论了双金属镍 - M（M = 铁、钴、铜、钌、铑、铂、钯、铼）基催化剂用于一氧化碳甲烷化反应领域的最新进展。
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