Highly efficient electro-reduction of CO<sub>2</sub> to formic acid by nano-copper

Gupta, Kalyani; Bersani, Marco; Darr, Jawwad A.

doi:10.1039/c6ta04874a

Cited by 96 publications

(57 citation statements)

References 39 publications

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“…Moreover, additional confirmation of CuO state was seen with the broad satellite peaks at a higher binding energy than the main peaks. The main peak of Cu 2p 3/2 at 933.8 eV was accompanied by two satellite peaks on the higher binding energy side at about 943.8 eV and 941.5 eV, which suggests the existence of CuO [38][39][40][41]. From this figure, we can clearly see that the main peak of Cu 2p 1/2 at 953.8 eV and its satellite peak at 962.5 eV were separated by about 9.0 eV, which also confirms the presence of CuO [42].…”

Section: Catalyst Characterizationsmentioning

confidence: 94%

CuO Nanoparticles Supported on TiO2 with High Efficiency for CO2 Electrochemical Reduction to Ethanol

et al. 2018

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Non-noble metal oxides consisting of CuO and TiO 2 (CuO/TiO 2 catalyst) for CO 2 reduction were fabricated using a simple hydrothermal method. The designed catalysts of CuO could be in situ reduced to a metallic Cu-forming Cu/TiO 2 catalyst, which could efficiently catalyze CO 2 reduction to multi-carbon oxygenates (ethanol, acetone, and n-propanol) with a maximum overall faradaic efficiency of 47.4% at a potential of −0.85 V vs. reversible hydrogen electrode (RHE) in 0.5 M KHCO 3 solution. The catalytic activity for CO 2 electroreduction strongly depends on the CuO contents of the catalysts as-prepared, resulting in different electrochemistry surface areas. The significantly improved CO 2 catalytic activity of CuO/TiO 2 might be due to the strong CO 2 adsorption ability.

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Section: Catalyst Characterizationsmentioning

confidence: 94%

CuO Nanoparticles Supported on TiO2 with High Efficiency for CO2 Electrochemical Reduction to Ethanol

et al. 2018

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“…Cu(110) is the most active surface for the production of formate [optimized faradaic efficiency (FE) of 24.7 % at −0.80 V vs. RHE], whereas Cu(100) is the most inactive (FE

_{HCOO^{-}}

=9.0 % at −0.85 V vs. RHE). Recently, Darr and co‐workers reported that CuO‐derived Cu nanoparticles supported on a Nafion network could reduce CO 2 to formate at −1.4 V versus Ag/AgCl with a FE of 61 % and j

_{HCOO^{-}}

of approximately −2 mA cm −2 …”

Section: Introductionmentioning

confidence: 94%

“…Owing to the high market value and wide usage of formic acid, the development of facile methods for its production through the direct electrochemical reduction of CO 2 driven by renewable energy has become an irresistible proposition. In recent decades, various catalysts based on palladium, cobalt, tin, indium, lead, and metal‐free nitrogen‐doped carbon materials have been reported for this purpose (Table ) . The standard potential for the reduction of CO 2 to formic acid (CO 2 +2 H + +2 e − →HCOOH) is −0.20 V versus the reversible hydrogen electrode (RHE) .…”

Section: Introductionmentioning

confidence: 98%

“…In recent decades, variousc atalysts based on palladium, cobalt, tin, indium, lead, and metal-free nitrogen-doped carbon materials have been reported for this purpose (Table 1). [5][6][7][8][9][10][11][12][13] The standard potential for the reduction of CO 2 to formic acid (CO 2 + +2H + + + +2e À !HCOOH) is À0.20 Vv ersus the reversible hydrogen electrode (RHE). [14,15] However,a no verpotential of up to 1V is usuallyr equired to drive the reactiona tr easonable rates.…”

Section: Introductionmentioning

confidence: 99%

“…Recently,D arr and coworkers reported that CuO-derived Cu nanoparticles supported on aN afion network could reduce CO 2 to formate at À1.4 V versus Ag/AgCl with aF Eo f6 1% and j HCOO À of approximately À2mAcm À2 . [11] Goddarda nd co-workers suggested ao ne-step direct reduction mechanism for formate production on Cu(100) surfaces through the reactiono fp hysisorbed CO 2 with surface-adsorbed Ha toms (H*). [22] Notably,t his process competes with the H 2 evolution reaction (HER) for H*.…”

Section: Introductionmentioning

confidence: 99%

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Rational Design of Sulfur‐Doped Copper Catalysts for the Selective Electroreduction of Carbon Dioxide to Formate

et al. 2017

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The selective electroreduction of CO2 to formate (or formic acid) is of great interest in the field of renewable‐energy utilization. In this work, we designed a sulfur‐doped Cu2O‐derived Cu catalyst and showed that the presence of sulfur can tune the selectivity of Cu significantly from the production of various CO2 reduction products to almost exclusively formate. Sulfur is doped into the Cu catalysts by dipping the Cu substrates into ammonium polysulfide solutions. Catalyst films with the highest sulfur content of 2.7 at % showed the largest formate current density (jHCOO- ) of −13.9 mA cm−2 at −0.9 V versus the reversible hydrogen electrode (RHE), which is approximately 46 times larger than that previously reported for Cu(110) surfaces. At −0.8 V versus RHE, the faradaic efficiency of formate was maintained at approximately 75 % for 12 h of continuous electrolysis. Through the analysis of the evolution of the jHCOO- and jnormalH2 values with the sulfur content, we show that sulfur doping increases formate production and suppresses the hydrogen evolution reaction. Ag–S and Cu–Se catalysts did not exhibit any significant enhancement towards the reduction of CO2 to formate. This demonstrates clearly that sulfur and copper acted synergistically to promote the selective formation of formate. A hypothesis about the role of sulfur is proposed and discussed.

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Cu‐Based Catalytic Materials for Electrochemical Carbon Dioxide Reduction: Recent Advances and Perspectives

Yang

Wang

et al. 2023

Adv Energy and Sustain Res

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Electrocatalytic CO2 reduction reaction (CRR) is a promising way to convert carbon dioxide (CO2) into value‐added hydrocarbons to alleviate the ever‐increasing environmental problem and accelerate the realization of carbon cycling. Cost‐effective and stable electrocatalytic materials with low overpotential, superior selectivity, excellent activity and great stability are critically important to achieve such a target. Cu‐based electrocatalysts are promising candidates for electrochemical CRR due to their versatile abilities of converting CO2 into various products. This review analyzes and summarizes the current progress in utilization of Cu‐based catalytic materials for electrochemical CRR. Monometallic, bimetallic, trimetallic, and multimetallic Cu‐based electrocatalysts with variable elemental compositions and tunable morphologies, including Cu nanowires, Cu nanocubes (NCs), Cu porous structures, Cu‐based alloys, Cu‐oxide/hydrogen oxide, Cu single atoms, and 2D substrate‐supported Cu electrocatalysts for CRR, are surveyed. Substantial advances in overcoming the existing bottlenecks of eletrocatalysts and effectively improving CRR performance of Cu‐based electrocatalysts for future applications are systematically discussed. Challenges and perspectives of Cu‐based electrocatalytic materials for CRR are also offered, which may shed light on further development of Cu‐based electrocatalysts with superior performance. It is anticipated that this review will provide a valuable insight into the rational design and synthesis of highly efficient Cu‐based electrocatalysts for large‐scale CRR utilization.

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Highly efficient electro-reduction of CO₂ to formic acid by nano-copper

Abstract: Ultra-fine copper(ii) oxide nanoparticles were used for the electrocatalytic reduction of CO2 to formic acid at high Faradaic efficiencies.

Cited by 96 publications

References 39 publications

CuO Nanoparticles Supported on TiO2 with High Efficiency for CO2 Electrochemical Reduction to Ethanol

CuO Nanoparticles Supported on TiO2 with High Efficiency for CO2 Electrochemical Reduction to Ethanol

Rational Design of Sulfur‐Doped Copper Catalysts for the Selective Electroreduction of Carbon Dioxide to Formate

Cu‐Based Catalytic Materials for Electrochemical Carbon Dioxide Reduction: Recent Advances and Perspectives

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Highly efficient electro-reduction of CO2 to formic acid by nano-copper

Abstract: Ultra-fine copper(ii) oxide nanoparticles were used for the electrocatalytic reduction of CO2 to formic acid at high Faradaic efficiencies.

Cited by 96 publications

References 39 publications

CuO Nanoparticles Supported on TiO2 with High Efficiency for CO2 Electrochemical Reduction to Ethanol

CuO Nanoparticles Supported on TiO2 with High Efficiency for CO2 Electrochemical Reduction to Ethanol

Rational Design of Sulfur‐Doped Copper Catalysts for the Selective Electroreduction of Carbon Dioxide to Formate

Cu‐Based Catalytic Materials for Electrochemical Carbon Dioxide Reduction: Recent Advances and Perspectives

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Highly efficient electro-reduction of CO₂ to formic acid by nano-copper