Pulsed electrochemical synthesis of formate using Pb electrodes

Blom, Martijn; Smulders, Vera; Swaaij, W.P.M. van; Kersten, Sascha R.A.; Mul, Guido

doi:10.1016/j.apcatb.2019.118420

Cited by 29 publications

(22 citation statements)

References 27 publications

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“…[31][32][33][34] The majority of eCO 2 R studies reported to date have focused on constant-potential operation, and these potentialreversing studies establish anodic treatments and pulsed-potential methods as a promising approach to improve durability of the eCO 2 R. 30,31,[35][36][37][38][39][40][41][42][43] More recently, similar pulse methods have garnered increasing attention as an attractive option to influence electrocatalytic processes and reaction selectivity beyond mainstream efforts to modify the catalyst and electrolyte. 32,[44][45][46][47][48][49][50][51][52][53][54][55][56][57] These mainstream efforts include surface faceting, nanostructuring the catalyst, modifying the electrochemical cell design, including additives in the electrolyte to control the ionic environment and pH, as well as combining copper with other metals to create bimetallic catalysts. 5 Catalysts structured with predominantly (100) facets, high electrochemically active surface areas, and more undercoordinated sites can favor C 2+ products.…”

Section: Context and Scalementioning

confidence: 99%

Pulse check: Potential opportunities in pulsed electrochemical CO2 reduction

Casebolt

Levine

Suntivich

et al. 2021

Joule

113

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Section: Context and Scalementioning

confidence: 99%

Pulse check: Potential opportunities in pulsed electrochemical CO2 reduction

Casebolt

Levine

Suntivich

et al. 2021

Joule

113

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“…The enhancement of the CO formation reaches a maximum of 41.1 % at −1.05 V vs. RHE when more Pb is present in the form of a Cu/Pb ratio of 9.0, resulting from the formation of more metallic Pb and the subsequent stronger Cu−Pb synergy under reaction conditions. The increase in HCOOH FE for Cu 9.00 Pb 1.00 compared to Cu 9.20 Pb 0.80 suggests that the HCOOH formation is intrinsically promoted by Pb species [53–56] . However, when even more Pb is introduced, the enhancement effect for CO production is weakened, which is explained by the lower tendency of Cu 8.65 Pb 1.35 to form metallic Cu and Pb under these reaction conditions.…”

Section: Resultsmentioning

confidence: 96%

“…The increase in HCOOH FE for Cu 9.00 Pb 1.00 compared to Cu 9.20 Pb 0.80 suggests that the HCOOH formation is intrinsically promoted by Pb species. [53][54][55][56] However, when even more Pb is introduced, the enhancement effect for CO production is weakened, which is explained by the lower tendency of Cu 8.65 Pb 1.35 to form metallic Cu and Pb under these reaction conditions. Therefore, CO production dramatically decreases in Cu 8.65 Pb 1.35 due to the absence of a synergistic effect between metallic Cu and Pb, and the catalytic performance is similar to pure Cu (Figure 3a).…”

Section: Chemcatchemmentioning

confidence: 99%

Waste‐Derived Copper‐Lead Electrocatalysts for CO₂ Reduction

Yang

Anastasiadou

et al. 2022

ChemCatChem

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It remains a real challenge to control the selectivity of the electrocatalytic CO 2 reduction (eCO 2 R) reaction to valuable chemicals and fuels. Most of the electrocatalysts are made of non-renewable metal resources, which hampers their largescale implementation. Here, we report the preparation of bimetallic copper-lead (CuPb) electrocatalysts from industrial metallurgical waste. The metal ions were extracted from the metallurgical waste through simple chemical treatment with ammonium chloride, and Cu x Pb y electrocatalysts with tunable compositions were fabricated through electrodeposition at varying cathodic potentials. X-ray spectroscopy techniques showed that the pristine electrocatalysts consist of Cu 0 , Cu 1 + and Pb 2 + domains, and no evidence for alloy formation was found. We found a volcano-shape relationship between eCO 2 R selectivity toward two electron products, such as CO, and the elemental ratio of Cu and Pb. A maximum Faradaic efficiency towards CO was found for Cu 9.00 Pb 1.00 , which was four times higher than that of pure Cu, under the same electrocatalytic conditions. In situ Raman spectroscopy revealed that the optimal amount of Pb effectively improved the reducibility of the pristine Cu 1 + and Pb 2 + domains to metallic Cu and Pb, which boosted the selectivity towards CO by synergistic effects. This work provides a framework of thinking to design and tune the selectivity of bimetallic electrocatalysts for CO 2 reduction through valorization of metallurgical waste.

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“…There is evidence that the choice of solvent has an impact on the coverage of the catalyst by the binder, which in turn influences the product distribution during CO 2 RR. [43] (a) (b)…”

Section: Introductionmentioning

confidence: 99%

Contributions of Pulsed Operation Along with Proper Choice of the Substrate for Stabilizing the Catalyst Performance in Electrochemical Reduction of CO₂ Toward Ethylene in Gas Diffusion Electrode Based Flow Cell Reactors

et al. 2022

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Electrochemical reduction of CO2 is a promising method to close the carbon cycle and thereby contribute to counteracting climate change. A large share of the research is going into the development of new high‐performance catalysts. Often, these catalysts are expensive and difficult to synthesize, especially if considering scaling up to the industrial application. The catalyst is, however, only one factor within the complex system of a CO2‐electrolyzer with numerous parameters to explore and optimize. Herein, an optimization process relying on a commercial copper nanopowder as a catalyst is reported. By replacing conductive carbon with polytetrafluoroethylene as the base material of the gas diffusion electrode (GDE) and applying a pulsed potential during electrolysis, the average faradaic efficiency for ethylene could be increased from 38% over 20 h to 50% over 100 h. In addition to the five times increased stability of the process, the ethylene‐producing current density rises from 106 to 152 mA cm−2, respectively, while hydrogen evolution was simultaneously reduced. Additionally, further investigations on the interplay of GDE base material, binder, current collector, and catalyst on the electrode performance are presented.

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Pulsed electrochemical synthesis of formate using Pb electrodes

Cited by 29 publications

References 27 publications

Pulse check: Potential opportunities in pulsed electrochemical CO2 reduction

Pulse check: Potential opportunities in pulsed electrochemical CO2 reduction

Waste‐Derived Copper‐Lead Electrocatalysts for CO₂ Reduction

Contributions of Pulsed Operation Along with Proper Choice of the Substrate for Stabilizing the Catalyst Performance in Electrochemical Reduction of CO₂ Toward Ethylene in Gas Diffusion Electrode Based Flow Cell Reactors

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Pulsed electrochemical synthesis of formate using Pb electrodes

Cited by 29 publications

References 27 publications

Pulse check: Potential opportunities in pulsed electrochemical CO2 reduction

Pulse check: Potential opportunities in pulsed electrochemical CO2 reduction

Waste‐Derived Copper‐Lead Electrocatalysts for CO2 Reduction

Contributions of Pulsed Operation Along with Proper Choice of the Substrate for Stabilizing the Catalyst Performance in Electrochemical Reduction of CO2 Toward Ethylene in Gas Diffusion Electrode Based Flow Cell Reactors

Contact Info

Product

Resources

About

Waste‐Derived Copper‐Lead Electrocatalysts for CO₂ Reduction

Contributions of Pulsed Operation Along with Proper Choice of the Substrate for Stabilizing the Catalyst Performance in Electrochemical Reduction of CO₂ Toward Ethylene in Gas Diffusion Electrode Based Flow Cell Reactors