Highly efficient In–Sn alloy catalysts for electrochemical reduction of CO 2 to formate

Lai, Qiang; Yang, Na; Yuan, Gaoqing

doi:10.1016/j.elecom.2017.08.015

Cited by 74 publications

(45 citation statements)

References 22 publications

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“…Formic acid is produced from the transfer of protons and electrons from the reaction between the CO 2 − radical and proton donors like water, bicarbonate, and hydronium ions [36,40]. Li et al reported that Sn foil follows this mechanism and can produce formate with an FE of 63.6% and a partial current density of 3.11 mA cm −2 at −1.01 V vs. RHE [41]. Metals such as In, Pb, Hg, Sn, and Bi are reported to follow the O-bound-intermediate pathway due to the easier formation of the *HCOO intermediate compared to *COOH [19,42].…”

Section: Reaction Pathwaysmentioning

confidence: 99%

“…Bimetallic compounds can change the electronic structure of a catalyst, which affects the intermediate binding energy, which in turn controls the overall reaction pathway [27]. Many previously reported bimetallic compounds have shown enhanced catalytic activity compared to the corresponding pristine-metal-based catalysts, such as Ag-Sn [63], Cu-Bi [24,64], In-Sn [41], Sn-Cu [65,66], Pd-Ni [67], and Bi-Sn [47].…”

Section: Bimetallic Compoundsmentioning

confidence: 99%

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Recent Advances in the Catalyst Design and Mass Transport Control for the Electrochemical Reduction of Carbon Dioxide to Formate

Alfath

Lee

2020

Catalysts

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Closing the carbon cycle by the electrochemical reduction of CO2 to formic acid and other high-value chemicals is a promising strategy to mitigate rapid climate change. The main barriers to commercializing a CO2 reduction reaction (CO2RR) system for formate production are the chemical inertness, low aqueous solubility, and slow mass transport characteristics of CO2, along with the low selectivity and high overpotential observed in formate production via CO2 reduction. To address those problems, we first explain the possible reaction mechanisms of CO2RRs to formate, and then we present and discuss several strategies to overcome the barriers to commercialization. The electronic structure of the catalyst can be tuned to favor a specific intermediate by adjusting the catalyst composition and tailoring the facets, edges, and corners of the catalyst to better expose the active sites, which has primarily led to increased catalytic activity and selectivity. Controlling the local pH, employing a high-pressure reactor, and using systems with three-phase boundaries can tune the mass transport properties of reactants at the catalyst surface. The reported electrocatalytic performances are summarized afterward to provide insight into which strategies have critical effects on the production of formate.

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Section: Reaction Pathwaysmentioning

confidence: 99%

Section: Bimetallic Compoundsmentioning

confidence: 99%

Recent Advances in the Catalyst Design and Mass Transport Control for the Electrochemical Reduction of Carbon Dioxide to Formate

Alfath

Lee

2020

Catalysts

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“…Meanwhile, the lowered tin‐tin coordination numbers enabled tin quantum sheets confined in graphene to efficiently stabilize the CO 2 radical anion, which facilitated the CO 2 electroreduction and demonstrated superior performance . High efficient alloys such as In–Sn alloy, Sn‐Pb alloy and Ag–Sn bimetallic electrocatalysts have also been developed for CO 2 reduction to formic acid. Jiao et al synthesized Ag–Sn electrocatalysts with a AgSn/SnO x core‐shell nanostructure, in which the AgSn bimetallic core provides high electronic conductivity and the ultrathin partially oxidized SnO x shell catalyzes the CO 2 reduction .…”

Section: Formic Acid‐producing Materialsmentioning

confidence: 99%

A Review of Metal‐ and Metal‐Oxide‐Based Heterogeneous Catalysts for Electroreduction of Carbon Dioxide

Liu

Trần‐Phú

Chen

2018

Advanced Sustainable Systems

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Capping and, eventually, reducing the atmospheric levels of greenhouse gases such as CO2 is an urgent priority, and a focus of multidisciplinary efforts. Among other techniques, advanced technologies for CO2 capture and conversion are highly desirable to limit CO2 emissions. Electrochemical reduction of CO2, using off‐peak renewable electricity, to value‐added chemicals and fuels has attracted extensive research interest. A main effort is directed toward the development of efficient, selective, and robust electrocatalysts to promote CO2 reduction, due to its sluggish reaction kinetics. Here, recent investigations and achievements in the design of metal‐ and metal‐oxide‐based heterogeneous catalysts are reviewed in terms of catalytic activity, selectivity, stability, and mechanism. A classification of heterogeneous CO2 catalysts is presented based on the main products of electrochemical reduction of CO2, including HCOOH, CO, C2H4, CH3OH, and C3H8O. The key catalysts' properties favoring the production of specific chemical products from the CO2 reduction reaction are critically discussed. The challenges for achieving superior CO2 reduction electrocatalysts are discussed providing future research directions for their design and development.

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“…Though the majority of the work is on coinage metals such as alloys of Cu with Au [14,15], Ag [16,17], Ni, Sn and Pb [18], Ag-In [19], W-Au [20] and Pd-Pt [21]. Relatively, alloys of Pb, Sn, and Bi have received less attention for example Pb-Sn [22][23][24][25], Sn-In [26]. Therefore, it can be considered well established that alloying of metals enhances catalytic activity in several cases.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical reduction of CO2 on Pb–Bi–Sn metal mixtures: importance of eutectics

Kumawat

Sarkar

2019

SN Appl. Sci.

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Pure phases of Pb, Sn and Pb 70 Bi 30 , their combinations and the eutectics (Pb 25 Sn 75 , Pb 44 Bi 56 and Pb 29 Bi 46 Sn 25) of the Pb-Bi-Sn system were prepared and evaluated for electrochemical reduction of CO 2 at − 2.0 V (vs Hg/HgO). The bulk composition, the phase structure and the surface composition were characterized by inductively ICP-AES, XRD and XPS respectively. The phases obtained from XRD data matches well with the ternary phase diagram of Pb, Bi and Sn. The electrochemical characterization was done by CV and LSV. The formation rate of formate ions was compared for all the alloy catalysts at − 2.0 V (vs Hg/HgO) in CO 2 saturated 0.5 M NaHCO 3. It was observed that addition of both Bi and Sn individually or both concurrently to Pb increases the rate of formate ion production for Pb-Bi, Pb-Sn binary systems and the Pb-Bi-Sn ternary system respectively. Interestingly, it was found out that the eutectic compositions of each alloy system (both binary and ternary) were electrocatalytically superior (Pb-Bi-Sn eutectic (Pb 29 Bi 46 Sn 25) > Pb-Sn eutectic (Pb 25 Sn 75) > Pb-Bi eutectic (Pb 44 Bi 56)). Further, on these high performing eutectics, the hydrogen evolution is greatly suppressed.

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Highly efficient In–Sn alloy catalysts for electrochemical reduction of CO 2 to formate

Cited by 74 publications

References 22 publications

Recent Advances in the Catalyst Design and Mass Transport Control for the Electrochemical Reduction of Carbon Dioxide to Formate

Recent Advances in the Catalyst Design and Mass Transport Control for the Electrochemical Reduction of Carbon Dioxide to Formate

A Review of Metal‐ and Metal‐Oxide‐Based Heterogeneous Catalysts for Electroreduction of Carbon Dioxide

Electrochemical reduction of CO2 on Pb–Bi–Sn metal mixtures: importance of eutectics

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