Electrochemical control of the RWGS reaction over Ni nanoparticles deposited on yttria stabilized zirconia

Zagoraios, Dimitrios; Kokkinou, Nikoletta; Kyriakou, Georgios; Katsaounis, Alexandros

doi:10.1039/d1cy02140k

Cited by 9 publications

(6 citation statements)

References 58 publications

(101 reference statements)

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“…Performing CV can provide a piece of in‐situ information about the electrochemical processes at the tpb, backspillover phenomena, as well as redox properties and changes in the oxidation states of the catalysts before and after the reactions. Therefore, CV is widely applied in EPOC studies as an electrochemical characterization method [25,26,57] …”

Section: Resultsmentioning

confidence: 99%

“…Therefore, CV is widely applied in EPOC studies as an electrochemical characterization method. [25,26,57] Figure 6a shows the CV of the as-prepared and spent 4 wt.% Cu/Co 3 O 4 samples between À 0.8 and 1.5 V under Argon at 400 °C. The CV of as-prepared sample showed similar trend to that of bare Co 3 O 4 deposited on YSZ, as shown in the Figure 6b.…”

Section: Cyclic Voltammetrymentioning

confidence: 99%

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Insight into Electrochemical Promotion of Cu/Co₃O₄ Catalysts for the Reverse Water Gas Shift Reaction

2023

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In this study, Copper-modified Co 3 O 4 (Cu/Co 3 O 4 ) catalysts were investigated for the reverse water gas shift (RWGS) reaction at 200-400 °C under different CO 2 : H 2 ratios. It was found that the electrocatalytic performance of Co 3 O 4 was improved by loading 4 weight percent (wt.%) Cu nanoparticles (average size: 13 nm), which could be then used as an electrode in electrochemical promotion of catalysis (EPOC) studies. Under the applied voltages of + 2 V and À 1 V, the catalytic rates were suppressed and increased by about 40 % and 14 %, respectively. This was due to the changes in the active oxidation states of Cu and Co caused by O 2À migration under polarization, as confirmed by XPS, XRD, and cyclic voltammetry (CV). The study also revealed that the exchange current density (i 0 ) was counter-correlated with the open-circuit catalytic rate (r 0 ) and could serve as an informative tool for predicting the catalytic rate, which was demonstrated for the first time in the instance of RWGS reaction.

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Section: Resultsmentioning

confidence: 99%

Section: Cyclic Voltammetrymentioning

confidence: 99%

Insight into Electrochemical Promotion of Cu/Co₃O₄ Catalysts for the Reverse Water Gas Shift Reaction

2023

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“…In addition, many other nickel catalysts have been reported [48,49,[85][86][87][88][89][90][91][92][93][94][95][96][97][98], including bimetallic [93][94][95][96][97][98] or polymetallic catalysts composed of nickel and other metals.…”

Section: Ni-based Catalystsmentioning

confidence: 99%

Recent Advances in the Reverse Water–Gas Conversion Reaction

Zhou,

Zhang,

et al. 2023

Molecules

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The increase in carbon dioxide emissions has significantly impacted human society and the global environment. As carbon dioxide is the most abundant and cheap C1 resource, the conversion and utilization of carbon dioxide have received extensive attention from researchers. Among the many carbon dioxide conversion and utilization methods, the reverse water–gas conversion (RWGS) reaction is considered one of the most effective. This review discusses the research progress made in RWGS with various heterogeneous metal catalyst types, covering topics such as catalyst performance, thermodynamic analysis, kinetics and reaction mechanisms, and catalyst design and preparation, and suggests future research on RWGS heterogeneous catalysts.

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“…CO2 reduction to valuable fuels via heterogeneous catalytic processes has been thoroughly studied using various active metals and supports. Noble metals, including Ru, Rh, Pt, and Pd [5,15,16], as well as inexpensive metals such as Ni, Cu, and Co [17][18][19][20], deposited on various supported materials, have been thoroughly discussed in the literature for their catalytic and electrocatalytic performance in terms of activity and selectivity in a plethora of reactors such as fixed-bed, single-chamber, monolithic-type and SOFC type reactors [19,[21][22][23][24][25][26][27]. In this respect, the Electrochemical Promotion of Catalysis (EPOC) can be utilized to increase the overall CO2 conversion to valuable products.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Promotion of CO2 Hydrogenation Using a Pt/YSZ Fuel Cell Type Reactor

Lymperi¹,

Chatzilias²,

Xydas³

et al. 2023

Preprint

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The hydrogenation of CO2 is a reaction of key technological and environmental importance, as it contributes to the sustainable production of fuels while assisting in the reduction of a major greenhouse gas. The reaction has been studied extensively in the literature, with noble metal catalysts receiving significant attention within the catalysis and electrocatalysis communities. In this respect, the Electrochemical Promotion of Catalysis (EPOC) has been applied successfully to the CO2 hydrogenation reaction to improve the catalytic activity and selectivity of conductive films supported on solid electrolytes. However, designing an effective electrocatalytic reactor remains a challenge due to the connections required between the electrodes and the external potentiostat/galvanostat. This drawback could be alleviated if the catalytic reaction occurs in a reactor that simultaneously operates as a power generator. In this work, the Electrochemical Promotion of the CO2 hydrogenation reaction in a low temperature solid electrolyte fuel cell (SOFC) reactor is studied using yttria-stabilized zirconia (YSZ) and a platinum (Pt) catalyst. The system has been studied in two distinct operation modes: (i) when the necessary energy for the electrochemical promotion is produced through the parallel reaction of H2 oxidation (galvanic operation) and (ii) when a galvanostat/potentiostat is used to impose the necessary potential (electrolytic operation).

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Electrochemical control of the RWGS reaction over Ni nanoparticles deposited on yttria stabilized zirconia

Abstract: Transition metal oxides are promising candidates for the activation of the reverse water gas shift (RWGS) reaction. The in-situ formation and stabilization of these oxides appears to be a key...

Cited by 9 publications

References 58 publications

Insight into Electrochemical Promotion of Cu/Co₃O₄ Catalysts for the Reverse Water Gas Shift Reaction

Insight into Electrochemical Promotion of Cu/Co₃O₄ Catalysts for the Reverse Water Gas Shift Reaction

Recent Advances in the Reverse Water–Gas Conversion Reaction

Electrochemical Promotion of CO2 Hydrogenation Using a Pt/YSZ Fuel Cell Type Reactor

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Electrochemical control of the RWGS reaction over Ni nanoparticles deposited on yttria stabilized zirconia

Abstract: Transition metal oxides are promising candidates for the activation of the reverse water gas shift (RWGS) reaction. The in-situ formation and stabilization of these oxides appears to be a key...

Cited by 9 publications

References 58 publications

Insight into Electrochemical Promotion of Cu/Co3O4 Catalysts for the Reverse Water Gas Shift Reaction

Insight into Electrochemical Promotion of Cu/Co3O4 Catalysts for the Reverse Water Gas Shift Reaction

Recent Advances in the Reverse Water–Gas Conversion Reaction

Electrochemical Promotion of CO2 Hydrogenation Using a Pt/YSZ Fuel Cell Type Reactor

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Product

Resources

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Insight into Electrochemical Promotion of Cu/Co₃O₄ Catalysts for the Reverse Water Gas Shift Reaction

Insight into Electrochemical Promotion of Cu/Co₃O₄ Catalysts for the Reverse Water Gas Shift Reaction