Boron-doped diamond semiconductor electrodes: Efficient photoelectrochemical CO2 reduction through surface modification

Roy, Nilanjan; Hirano, Yuiri; Kuriyama, Haruo; Sudhagar, P.; Suzuki, Norihiro; Katsumata, Ken Ichi; Nakata, Kohei; Kondo, Takeshi; Yuasa, Makoto; Serizawa, Izumi; Takayama, Tomoaki; Kudo, Akihiko; Fujishima, Akira; Terashima, Chiaki

doi:10.1038/srep38010

Cited by 45 publications

(16 citation statements)

References 44 publications

(75 reference statements)

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“…A cathodic peak at −1.0 V vs Ag/AgCl in both N 2 and CO 2 saturated condition reveals the reduction of surface species of the Cu−SnO x hybrid nanostructures, especially the oxides (Figure a). Bare BDD L alone is not capable to reduce CO 2 under similar conditions as reported earlier . A cathodic peak in CO 2 at −1.8 V suggests the efficient CO 2 reduction activity of the Cu−SnO x hybrid nanostructures deposited on BDD L .…”

Section: Resultssupporting

confidence: 75%

Facile Deposition of Cu−SnO_x Hybrid Nanostructures on Lightly Boron‐Doped Diamond Electrodes for CO₂ Reduction

et al. 2018

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In this work, we report a facile synthesis of Cu−SnOx hybrid nanostructures on lightly boron‐doped diamond (BDDL) electrodes by a potentiodynamic electrodeposition method. The deposition potential for Cu−SnOx hybrid nanostructures was cycled between 0 to −1.0 V vs Ag/AgCl for five consecutive runs at a scan rate of 50 mV/sec. The growth of the Cu−SnOx hybrid nanostructures on BDDL was optimized by varying the number of potentiodynamic deposition cycles and precursor concentration. A uniform particle size distribution of Cu−SnOx was obtained on BDDL using 10 mM CuSO4 and 5 mM SnCl2 in 50 mM aqueous NaNO3. Detail of surface morphology and surface elemental composition of the optimized Cu−SnOx hybrid nanostructures modified BDDL electrodes were characterized. The optimized Cu−SnOx hybrid nanostructures on BDDL were found to be in the size range of 50 to 100 nm with a 3 to 10 nm SnOx‐rich shell. This optimized Cu−SnOx modified BDDL electrode was tested for electrochemical CO2 reduction reaction in aqueous electrolyte and found to produce primarily CO with a Faradaic Efficiency of up to 82.5 % at −1.6 V vs Ag/AgCl.

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Section: Resultssupporting

confidence: 75%

Facile Deposition of Cu−SnO_x Hybrid Nanostructures on Lightly Boron‐Doped Diamond Electrodes for CO₂ Reduction

et al. 2018

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“…From another point of view, CO 2 is a cheap and abundant source of carbon, so the utilization of CO 2 is of great interest. In the past few decades, various methods to convert CO 2 into useful chemicals and fuels have been tried, such as photochemical, electrochemical, and photoelectrochemical methods . Of these, a great deal of attention has been devoted to electrochemical methods, since these can be performed under ambient temperature and pressure conditions, and, moreover, these methods are relatively easy to operate on a large scale for practical applications.…”

Section: Figurementioning

confidence: 99%

Stable and Highly Efficient Electrochemical Production of Formic Acid from Carbon Dioxide Using Diamond Electrodes

et al. 2018

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High faradaic efficiencies can be achieved in the production of formic acid (HCOOH) by metal electrodes, such as Sn or Pb, in the electrochemical reduction of carbon dioxide (CO ). However, the stability and environmental load in using them are problematic. The electrochemical reduction of CO to HCOOH was investigated in a flow cell using boron-doped diamond (BDD) electrodes. BDD electrodes have superior electrochemical properties to metal electrodes, and, moreover, are highly durable. The faradaic efficiency for the production of HCOOH was as high as 94.7 %. Furthermore, the selectivity for the production of HCOOH was more than 99 %. The rate of the production was increased to 473 μmol m s at a current density of 15 mA cm with a faradaic efficiency of 61 %. The faradaic efficiency and the production rate are almost the same as or larger than those achieved using Sn and Pb electrodes. Furthermore, the stability of the BDD electrodes was confirmed by 24 h operation.

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“…Regarding exclusively the electrochemical reduction of CO 2 , one of the outstanding properties of BDD – its chemical inertness – becomes a major problem causing low catalytic activity. Therefore, surface modifications with catalytically active nanoparticles, often achieved by simple electrodeposition, have been carried out extensively, e. g., Ag, [18] Cu, [19] Ce 2 O, [20] Cu 2 O, [21] CuO [22] . Such modified electrodes, however, often struggle from poor adhesion of the catalytic particles, which impedes long‐term operation.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Boron Doped Diamond Electrodes with Increased Reactivity for Solar‐Driven CO₂ Reduction in Room Temperature Ionic Liquids

et al. 2020

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Conductive, boron doped diamond (BDD) is an extraordinary material with many applications in electrochemistry due to its wide potential window, outstanding robustness, low capacitance and resistance to fouling. However, in photoelectrochemistry, BDD usually requires UV light for excitation, which impedes e. g., usage in CO2 to fuel reduction. In this work, a heavily boron doped, nanostructured diamond electrode with enhanced light absorption has been developed. It is manufactured from BDD by reactive ion etching and presents a coral‐like structure with pore diameters in the nanometer range, ensuring a huge surface area. The strong light absorbance of this material is clearly visible from its black color. Consequently, the material is called Diamond Black (DB). Electrochemical and X‐ray photoelectron spectroscopy measurements performed at near‐ambient pressure conditions of water vapor demonstrate increased surface reactivity for the hydrogen‐terminated DB compared to oxidized surfaces. Depending on the surface termination, the wettability and hence the electrochemically accessible area can be changed. Photoelectrochemical conversion of CO2 was demonstrated using a Cu2O‐modified electrode in ionic liquids under solar illumination. High formic acid production rates at low catalyst deposition times can be obtained paired with an increased catalyst stability on the DB surface.

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Boron-doped diamond semiconductor electrodes: Efficient photoelectrochemical CO2 reduction through surface modification

Cited by 45 publications

References 44 publications

Facile Deposition of Cu−SnO_x Hybrid Nanostructures on Lightly Boron‐Doped Diamond Electrodes for CO₂ Reduction

Facile Deposition of Cu−SnO_x Hybrid Nanostructures on Lightly Boron‐Doped Diamond Electrodes for CO₂ Reduction

Stable and Highly Efficient Electrochemical Production of Formic Acid from Carbon Dioxide Using Diamond Electrodes

Nanostructured Boron Doped Diamond Electrodes with Increased Reactivity for Solar‐Driven CO₂ Reduction in Room Temperature Ionic Liquids

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Boron-doped diamond semiconductor electrodes: Efficient photoelectrochemical CO2 reduction through surface modification

Cited by 45 publications

References 44 publications

Facile Deposition of Cu−SnOx Hybrid Nanostructures on Lightly Boron‐Doped Diamond Electrodes for CO2 Reduction

Facile Deposition of Cu−SnOx Hybrid Nanostructures on Lightly Boron‐Doped Diamond Electrodes for CO2 Reduction

Stable and Highly Efficient Electrochemical Production of Formic Acid from Carbon Dioxide Using Diamond Electrodes

Nanostructured Boron Doped Diamond Electrodes with Increased Reactivity for Solar‐Driven CO2 Reduction in Room Temperature Ionic Liquids

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Product

Resources

About

Facile Deposition of Cu−SnO_x Hybrid Nanostructures on Lightly Boron‐Doped Diamond Electrodes for CO₂ Reduction

Facile Deposition of Cu−SnO_x Hybrid Nanostructures on Lightly Boron‐Doped Diamond Electrodes for CO₂ Reduction

Nanostructured Boron Doped Diamond Electrodes with Increased Reactivity for Solar‐Driven CO₂ Reduction in Room Temperature Ionic Liquids