Advanced Cu-Sn foam for selectively converting CO2 to CO in aqueous solution

Zeng, Juqin; Bejtka, Katarzyna; Ju, Wenbo; Castellino, Micaela; Chiodoni, Angelica; Sacco, Adriano; Farkhondehfal, M. Amin; Hernández, Simelys; Rentsch, Daniel; Battaglia, Corsin; Pirri, Candido

doi:10.1016/j.apcatb.2018.05.056

Cited by 131 publications

(138 citation statements)

References 38 publications

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“…Chang and Kanan observed that the Pb oxide layer of Pb foil electrode passivated the surface for H 2 evolution and activated for CO 2 reduction . It should be noted that the FE (selectivity) of CO 2 ER by Pb‐doped Cu obtained in this study was less profound than Sn‐doped Cu reported in the literatures, despite that hydrogen evolution overpotential of Pb is higher than that of Sn. This is partially because Cu and Sn have solid solutions or intermetallics, which have synergistic effect on catalytic reduction of CO 2 .…”

Section: Resultssupporting

confidence: 37%

“…Early in 1991, Cu–Pb bimetal electrode was reported to enhance the FE for HCOOH to 50% from 22% and 7% by Cu and Pb electrodes at −1.15 V versus SHE . Recently, nanostructural Cu–Bi, Cu–In, and Cu–Sn catalysts were obtained by meticulous steps of electrodeposition or chemical deposition for enhanced CO 2 ER performance with total current densities of 0.6–7.9 mA cm −2 and FEs of 83–93% for electrolysis products CO and HCOOH. In spite of high overpotential for hydrogen evolution on Pb, 3D nanostructural Cu–Pb catalysts have not been reported.…”

Section: Introductionmentioning

confidence: 99%

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Facile Synthesis of Nanostructural High‐Performance Cu–Pb Electrocatalysts for CO₂ Reduction

Wang

Sun

et al. 2018

Adv Materials Inter

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Nanostructure and crystallinity of transition metals play an important role in catalyzing carbon dioxide electroreduction (CO2ER) where Cu is a typical electrocatalyst with a wide variety of products and Pb has a high overpotential for H2 evolution and is selective toward formic acid. In this study, 3D hierarchical nanostructures of Cu–Pb catalyst are prepared by a two‐step electrodepositing–annealing–electroreduction approach (EAE). Cu nanowires (Cu NWs) of 200–400 nm diameter are built on the surface of commercial nickel foam substrates through an EAE step. Then, Pb nanoparticles with diameter of 5–10 nm are uniformly created on the surface of Cu NWs by a second EAE step. The nanostructural Cu–Pb electrodes catalyze CO2ER at a current density of −9.35 mA cm−2 (at −0.93 V vs reversible hydrogen electrode (RHE)). The H2 evolution is suppressed by 35.6% and CO and HCOOH are enhanced by 29.6% and 9.2%, respectively, as compared with Cu NWs. The protocol proposed in this study provides a simple and straightforward approach for preparing high‐performance, hierarchical nanostructures of Cu–Pb bimetal catalyst for CO2ER.

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Section: Resultssupporting

confidence: 37%

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Nanostructural High‐Performance Cu–Pb Electrocatalysts for CO₂ Reduction

Wang

Sun

et al. 2018

Adv Materials Inter

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“…In the high-resolution SEM image (inset in Figure 4b), there is slightly discernable contrast among different regions on nanofibers, indicating a uniform composition on the surface. [45] The Cu clusters are removed by ultrasonic treatment, while the conformal Cu layer close to the pDA layer shows high tolerance to ultrasonication. Similarly, a conformal Cu layer forms on nylon or PVDF nanofibers after 2-h deposition ( Figure S3a www.advelectronicmat.de nanofibers and in pores, covering the original fibrous structure.…”

Section: Cu Deposition On Polymer Nanofibersmentioning

confidence: 99%

“…The double layer capacitance (C dl ) of the Cu-PVDF electrode is determined by a series of CVs at various scan rates measured in the double layer potential range ( Figure S6a, Supporting Information). The C dl is divided by a value of 28 µF cm −2 , [45,49] resulting in the electrochemical surface area of 35.12 cm 2 . The C dl is divided by a value of 28 µF cm −2 , [45,49] resulting in the electrochemical surface area of 35.12 cm 2 .…”

Section: Characterization Of Deposited Cu Layersmentioning

confidence: 99%

Conformal Cu Coating on Electrospun Nanofibers for 3D Electro‐Conductive Networks

Jiang

Pan

et al. 2019

Adv Elect Materials

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Electro‐conductive nanofiber networks have potential applications as gas diffusion electrodes (GDEs) operating at solid–liquid–gas three‐phase interfaces. Flexible GDEs are developed, based on a versatile method of conformally coating a Cu layer on membranes consisting of stacked electrospun nonconductive polymer nanofibers. The Cu coating, comprising fine‐grained Cu crystals, has an average thickness of circa 50 nm and a root‐mean‐square roughness of circa 5.3 nm, maintaining the topography of polymer nanofibers. For nanofiber membranes with a thickness ranging in a few micrometers, the conformal Cu layer coats all nanofibers in the outermost layers as well as in the bulk of the membrane. All demonstrated Cu‐coated nanofiber networks have sheet resistance <2.4 Ω◽, and gas permeability in the order of 10−13 to 10−15 m2, which are comparable to some commercialized carbon based micro‐/nanofiber GDEs. Particularly, these conductive nanofiber networks have excellent bending durability, with negligible conductivity degradation after 10 000 bending test cycles. The high conductivity, gas permeability, and flexibility of these 3D nanofiber networks allow for applications as GDEs into various flexible electrochemical devices.

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“…The presence of In atoms at the edges of the Cu surface could accelerate CO 2 adsorption and stabilize adsorbed species while disfavoring the adsorption of H + , which effectively suppresses HER. Another promising non‐noble metal employed to alloy with Cu for the electro‐reduction of CO 2 ‐to‐CO is Sn . Takanabe et al developed a bimetallic Cu‐Sn catalyst by electrodeposition of Sn species on OD‐Cu surfaces, which inhibited the formation of adsorbed H*, resulting in more than 90% of CO FE at –0.6 V RHE .…”

Section: Metallic Alloysmentioning

confidence: 99%

Progress in development of electrocatalyst for CO₂ conversion to selective CO production

et al. 2019

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The conversion of carbon dioxide (CO2) to valuable fuels and chemicals offers a new pathway for sustainable and clean carbon fixation. Recently, the focus has been on electrochemical CO2 reduction on heterogeneous electrode catalysts, leading to remarkable achievements in the reaction performance. To date, CO2 to carbon monoxide (CO) conversion is considered as the most promising candidate reaction for the industrial market, owing to its high efficiency and reasonable technoeconomic feasibility. Moreover, CO has been proposed as a key intermediate species for further reduced hydrocarbons, which can pave the way for various fuel production. This study sets out to describe recent progress on the electrochemical CO2 reduction to CO in a heterogeneously catalyzed system. The review includes understanding of the catalytic material employed and engineering strategies implemented by adjusting the binding energy of key adsorbates. These material design approaches, such as nanostructuring, alloying, doping, and so forth, have pioneered breakouts in the intrinsic catalytic nature of transition metal elements. Moreover, recent advances in systematic design are summarized, with focus on practical industrial applications. Finally, perspectives on the design of electrocatalyst materials for CO production by electrochemical CO2 reduction are presented.

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Advanced Cu-Sn foam for selectively converting CO2 to CO in aqueous solution

Cited by 131 publications

References 38 publications

Facile Synthesis of Nanostructural High‐Performance Cu–Pb Electrocatalysts for CO₂ Reduction

Facile Synthesis of Nanostructural High‐Performance Cu–Pb Electrocatalysts for CO₂ Reduction

Conformal Cu Coating on Electrospun Nanofibers for 3D Electro‐Conductive Networks

Progress in development of electrocatalyst for CO₂ conversion to selective CO production

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Advanced Cu-Sn foam for selectively converting CO2 to CO in aqueous solution

Cited by 131 publications

References 38 publications

Facile Synthesis of Nanostructural High‐Performance Cu–Pb Electrocatalysts for CO2 Reduction

Facile Synthesis of Nanostructural High‐Performance Cu–Pb Electrocatalysts for CO2 Reduction

Conformal Cu Coating on Electrospun Nanofibers for 3D Electro‐Conductive Networks

Progress in development of electrocatalyst for CO2 conversion to selective CO production

Contact Info

Product

Resources

About

Facile Synthesis of Nanostructural High‐Performance Cu–Pb Electrocatalysts for CO₂ Reduction

Facile Synthesis of Nanostructural High‐Performance Cu–Pb Electrocatalysts for CO₂ Reduction

Progress in development of electrocatalyst for CO₂ conversion to selective CO production