Ru and Ni—Privileged Metal Combination for Environmental Nanocatalysis

Polański, Jarosław; Lach, Daniel; Kapkowski, Maciej; Bartczak, Piotr; Siudyga, Tomasz; Smoliński, Adam

doi:10.3390/catal10090992

Cited by 12 publications

(15 citation statements)

References 113 publications

(162 reference statements)

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“…The combination of Ni with a noble metal aims to transfer some of these properties into Ni-based catalysts, without the need for the use of a high noble metal loading [33]. Combined Ni and Ru catalysts exist mostly in the form of heterostructures, rather than alloys, and Ru can provide additional methanation sites, as well as spillover hydrogen into nearby Ni sites [94]. On the other hand, Pt and Pd mostly modify the electronic properties of Ni via alloy formation [31,32].…”

Section: Promotion With Noble Metalsmentioning

confidence: 99%

“…Ru is the cheapest among the discussed noble metals and, at the same time, the most active metallic phase in CO 2 methanation. The combination of the metals Ru and Ni has been described as “privileged” due to the great benefits that can arise from the NiRu bimetallic synergy [ 94 ]. Ru can drastically improve the reducibility of Ni catalysts, as well as improve the Ni metallic dispersion and provide additional methanation sites.…”

Section: Promotion With Noble Metalsmentioning

confidence: 99%

“…The synergistic effect through the presence of Ru and Ni adjacent phases can be observed via the increased metal dispersion, the higher reducibility, the improved low-temperature activity and the superior stability. Ni and Ru are both very active CO 2 methanation sites on their own and their combination can lead to an enhancement of the intrinsic catalytic activity, and to a decrease in the activation energy, through the favourable activation of H 2 and CO 2 reactant molecules [ 33 , 94 ]. The only drawback for the use of Ru is its higher price compared to transition metals like Ni, Fe and Co, even though it is significantly cheaper when compared to other noble metals such as Rh or Pt.…”

Section: Promotion With Noble Metalsmentioning

confidence: 99%

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Bimetallic Ni-Based Catalysts for CO2 Methanation: A Review

et al. 2020

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CO2 methanation has recently emerged as a process that targets the reduction in anthropogenic CO2 emissions, via the conversion of CO2 captured from point and mobile sources, as well as H2 produced from renewables into CH4. 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 CO2 methanation reaction.

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Section: Promotion With Noble Metalsmentioning

confidence: 99%

Section: Promotion With Noble Metalsmentioning

confidence: 99%

Section: Promotion With Noble Metalsmentioning

confidence: 99%

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Bimetallic Ni-Based Catalysts for CO2 Methanation: A Review

et al. 2020

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“…To obtain Ru/CeO2/Ni catalysts, Ru was deposited onto precut Ni foam disks modified by CeO2 layers prepared by electroprecipitation [18][19][20][21][22][23][24][25][26][27][28][29][30], as schematically depicted in Figure 1. Table 1 presents a summary of the prepared catalysts.…”

Section: Characterization Of the Catalystsmentioning

confidence: 99%

Ru/Ce/Ni Metal Foams as Structured Catalysts for the Methanation of CO2

Cimino¹,

Cepollaro²,

Lisi³

et al. 2020

Catalysts

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The development of highly conductive structured catalysts with enhanced mass- and heat-transfer features is required for the intensification of the strongly exothermic catalytic hydrogenation of CO2 in which large temperature gradients should be avoided to prevent catalyst deactivation and to control selectivity. Therefore, in this work we set out to investigate the preparation of novel structured catalysts obtained from a commercial open cell Ni foam with high pore density (75 ppi) onto which a CeO2 layer was deposited via electroprecipitation, and, eventually, Ru was added by impregnation. Composite Ru/Ce/Ni foam catalysts, as well as simpler binary Ru/Ni and Ce/Ni catalysts were characterized by SEM-EDX, XRD, cyclic voltammetry, N2 physisorption, H2-temperature programmed reduction (TPR), and their CO2 methanation activity was assessed at atmospheric pressure in a fixed bed flow reactor via temperature programmed tests in the range from 200 to 450 °C. Thin porous CeO2 layers, uniformly deposited on the struts of the Ni foams, produced active catalytic sites for the hydrogenation of CO2 at the interface between the metal and the oxide. The methanation activity was further boosted by the dispersion of Ru within the pores of the CeO2 layer, whereas the direct deposition of Ru on Ni, by either impregnation or pulsed electrodeposition methods, was much less effective.

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“…We review the data handling and sharing problems in the design and discovery of catalyst candidates, particularly material informatics and catalyst design, structural coding, data collection and validation, infrastructure for catalyst design and online databases for catalyst design. This is because we have recently been investigating methanation catalysts [ 9 , 10 , 11 , 12 ], this review is specifically focused on nanocatalysts for methanation.…”

Section: Introductionmentioning

confidence: 99%

Functional and Material Properties in Nanocatalyst Design: A Data Handling and Sharing Problem

Lach

Zhdan

Smoliński

et al. 2021

IJMS

Self Cite

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(1) Background: Properties and descriptors are two forms of molecular in silico representations. Properties can be further divided into functional, e.g., catalyst or drug activity, and material, e.g., X-ray crystal data. Millions of real measured functional property records are available for drugs or drug candidates in online databases. In contrast, there is not a single database that registers a real conversion, TON or TOF data for catalysts. All of the data are molecular descriptors or material properties, which are mainly of a calculation origin. (2) Results: Here, we explain the reason for this. We reviewed the data handling and sharing problems in the design and discovery of catalyst candidates particularly, material informatics and catalyst design, structural coding, data collection and validation, infrastructure for catalyst design and the online databases for catalyst design. (3) Conclusions: Material design requires a property prediction step. This can only be achieved based on the registered real property measurement. In reality, in catalyst design and discovery, we can observe either a severe functional property deficit or even property famine.

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Ru and Ni—Privileged Metal Combination for Environmental Nanocatalysis

Cited by 12 publications

References 113 publications

Bimetallic Ni-Based Catalysts for CO2 Methanation: A Review

Bimetallic Ni-Based Catalysts for CO2 Methanation: A Review

Ru/Ce/Ni Metal Foams as Structured Catalysts for the Methanation of CO2

Functional and Material Properties in Nanocatalyst Design: A Data Handling and Sharing Problem

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