Decoration of ultra-long carbon nanotubes with Cu<sub>2</sub>O nanocrystals: a hybrid platform for enhanced photoelectrochemical CO<sub>2</sub>reduction

Kecsenovity, Egon; Endrődi, Balázs; Pápa, Zsuzsanna; Hernádi, Klára; Rajeshwar, Krishnan; Janáky, Csaba

doi:10.1039/c5ta10457b

Cited by 71 publications

(56 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Despite the enhanced OER performance, a high overpotential is still required to deliver a current density of 2 mA cm −1 in an alkaline electrolyte, indicating the weak chemical attachment leading to a poor electronic property. Pulsed electrodeposition method offers an alternative way to overcome the above challenges in depositing metal chalcogenides on 1‐D nanostructures such as carbon nanotubes, TiO 2 nanotubes and ZnO nanorods in PEC applications . However, to the best of our knowledge, synthesizing 1‐D Co 3 O 4 /ZnO nanostructured using pulsed electrodeposition has not been reported for electrochemical OER.…”

Section: Introductionsupporting

confidence: 85%

Pulsed Electrodeposition of Co₃O₄ Nanocrystals on One‐Dimensional ZnO Scaffolds for Enhanced Electrochemical Water Oxidation

Lü

et al. 2018

ChemPlusChem

View full text Add to dashboard Cite

Pulsed electrodeposition has been introduced to deposit ultrathin flakes of Co3O4 nanocrystals on ZnO nanorods. By fixing the seeding process, the scaffolding function of ZnO nanorods was studied by varying deposition times (30 s, 60 s, and 90 s) of Co3O4 at a nucleation current of −1.0 mA cm−2. The amount of deposited Co3O4 has a strong influence on the oxygen evolution performance with ZnO scaffolds. To deliver a current density of 10.0 mA cm−2 in neutral solutions (0.5 M K2SO4), the presence of ZnO scaffold electrodes negatively shifted the overpotential by ∼200 mV. In particular, the Co3O4/ZnO hybrid nanostructured electrode (60 s) exhibits the lowest onset potential of 1.5 V (vs. reversible hydrogen electrode, RHE). Electrochemical impedance spectra and double layer capacitance showed that the enhanced oxygen evolution activities originated from the improved charge transfer capability and the increased electrochemically active interface between Co3O4 and ZnO.

show abstract

Section: Introductionsupporting

confidence: 85%

Pulsed Electrodeposition of Co₃O₄ Nanocrystals on One‐Dimensional ZnO Scaffolds for Enhanced Electrochemical Water Oxidation

Lü

et al. 2018

ChemPlusChem

View full text Add to dashboard Cite

show abstract

“…As for the liquid phase, methanol, ethanol and minor amounts of formic acid were detected; similarly to earlier studies on Cu 2 O-containing photoelectrodes. 43,67 Interestingly, while the ethanol concentration increased continuously, the methanol formation only started after the steady-state PEC behavior was reached (Figure 7b). Quantitatively, the two alcohols accounted for a Faradaic efficiency of 50–60% (with a 2:3 FE ratio for methanol/ethanol) while the rest of the charge was related to H 2 and formate production, and the photoreduction of Cu 2 O to Cu as detailed above.…”

Section: Results and Discussionmentioning

confidence: 99%

Enhanced Photoelectrochemical Performance of Cuprous Oxide/Graphene Nanohybrids

et al. 2017

View full text Add to dashboard Cite

Combination of an oxide semiconductor with a highly conductive nanocarbon framework (such as graphene or carbon nanotubes) is an attractive avenue to assemble efficient photoelectrodes for solar fuel generation. To fully exploit the possible synergies of the hybrid formation, however, precise knowledge of these systems is required to allow rational design and morphological engineering. In this paper, we present the controlled electrochemical deposition of nanocrystalline p-Cu2O on the surface of different graphene substrates. The developed synthetic protocol allowed tuning of the morphological features of the hybrids as deduced from electron microscopy. (Photo)electrochemical measurements (including photovoltammetry, electrochemical impedance spectroscopy, photocurrent transient analysis) demonstrated better performance for the 2D graphene containing photoelectrodes, compared to the bare Cu2O films, the enhanced performance being rooted in suppressed charge carrier recombination. To elucidate the precise role of graphene, comparative studies were performed with carbon nanotube (CNT) films and 3D graphene foams. These studies revealed, after allowing for the effect of increased surface area, that the 3D graphene substrate outperformed the other two nanocarbons. Its interconnected structure facilitated effective charge separation and transport, leading to better harvesting of the generated photoelectrons. These hybrid assemblies are shown to be potentially attractive candidates in photoelectrochemical energy conversion schemes, namely CO2 reduction.

show abstract

“…In this regard, combining the high electrical conductivity of nanocarbon materials with the superior photoactive behavior of Cu 2 O semiconductor through the design of nanocarbon/nano Cu 2 O semiconductor hybrids may provide a promising approach to further promote the CO 2 reduction performance . For example, a hybrid CNT/Cu 2 O film was applied for PEC CO 2 reduction with enhanced performance . As shown in Figure a, ultralong carbon nanotubes (CNTs) with nanonet structure are used as a highly conductive template for the further electrodeposition of Cu 2 O nanoparticles.…”

Section: Photocathode and Electroanode Systemmentioning

confidence: 99%

Section: Photocathode and Electroanode Systemmentioning

confidence: 99%

Recent Progress on Photo‐Electrocatalytic Reduction of Carbon Dioxide

Wang

et al. 2018

Part & Part Syst Charact

View full text Add to dashboard Cite

Ever‐increasing carbon dioxide emission has led to serious greenhouse effect and global warming in recent years. Photo‐electrocatalysis is the most significant approach to convert carbon dioxide into hydrocarbon fuels to alleviate the greenhouse effect as well as ensure the global carbon cycling with inexhaustible solar energy resource. There are four typical configurations in the photo‐electrocatalytic (PEC) carbon dioxide reduction system, i.e., photocathode coupling with anode cell, photoanode combining with cathode cell, photocathode integrating photoanode cell, and a photovoltaic‐photo‐electrocatalytic tandem cell. This review briefly summarizes the state‐of‐the‐art progress of above four configurations for photo‐electrocatalytic carbon dioxide reduction with a focus on the rational design of the electrode materials to achieve higher efficiency. In addition, the innovative design of the PEC system for efficient carbon dioxide reduction has also been concisely introduced. Finally, the perspectives on the challenges and future development of photo‐electrocatalytic carbon dioxide reduction based on the discussed configurations are presented.

show abstract

Decoration of ultra-long carbon nanotubes with Cu₂O nanocrystals: a hybrid platform for enhanced photoelectrochemical CO₂reduction

Abstract: Photoelectrochemical reduction of CO2 to form useful chemicals is an increasingly studied avenue for harnessing and storing solar energy.

Cited by 71 publications

References 35 publications

Pulsed Electrodeposition of Co₃O₄ Nanocrystals on One‐Dimensional ZnO Scaffolds for Enhanced Electrochemical Water Oxidation

Pulsed Electrodeposition of Co₃O₄ Nanocrystals on One‐Dimensional ZnO Scaffolds for Enhanced Electrochemical Water Oxidation

Enhanced Photoelectrochemical Performance of Cuprous Oxide/Graphene Nanohybrids

Recent Progress on Photo‐Electrocatalytic Reduction of Carbon Dioxide

Contact Info

Product

Resources

About

Decoration of ultra-long carbon nanotubes with Cu2O nanocrystals: a hybrid platform for enhanced photoelectrochemical CO2reduction

Abstract: Photoelectrochemical reduction of CO2 to form useful chemicals is an increasingly studied avenue for harnessing and storing solar energy.

Cited by 71 publications

References 35 publications

Pulsed Electrodeposition of Co3O4 Nanocrystals on One‐Dimensional ZnO Scaffolds for Enhanced Electrochemical Water Oxidation

Pulsed Electrodeposition of Co3O4 Nanocrystals on One‐Dimensional ZnO Scaffolds for Enhanced Electrochemical Water Oxidation

Enhanced Photoelectrochemical Performance of Cuprous Oxide/Graphene Nanohybrids

Recent Progress on Photo‐Electrocatalytic Reduction of Carbon Dioxide

Contact Info

Product

Resources

About

Decoration of ultra-long carbon nanotubes with Cu₂O nanocrystals: a hybrid platform for enhanced photoelectrochemical CO₂reduction

Pulsed Electrodeposition of Co₃O₄ Nanocrystals on One‐Dimensional ZnO Scaffolds for Enhanced Electrochemical Water Oxidation

Pulsed Electrodeposition of Co₃O₄ Nanocrystals on One‐Dimensional ZnO Scaffolds for Enhanced Electrochemical Water Oxidation