Electrochemical Partial Reforming of Ethanol into Ethyl Acetate Using Ultrathin Co3O4 Nanosheets as a Highly Selective Anode Catalyst
Open Access
- 3 August 2016
- journal article
- research article
- Published by American Chemical Society (ACS) in ACS Central Science
- Vol. 2 (8), 538-544
- https://doi.org/10.1021/acscentsci.6b00164
Abstract
Electrochemical partial reforming of organics provides an alternative strategy to produce valuable organic compounds while generating H2 under mild conditions. In this work, highly selective electrochemical reforming of ethanol into ethyl acetate is successfully achieved by using ultrathin Co3O4 nanosheets with exposed (111) facets as an anode catalyst. Those nanosheets were synthesized by a one-pot, templateless hydrothermal method with the use of ammonia. NH3 was demonstrated critical to the overall formation of ultrathin Co3O4 nanosheets. With abundant active sites on Co3O4 (111), the as-synthesized ultrathin Co3O4 nanosheets exhibited enhanced electrocatalytic activities toward water and ethanol oxidations in alkaline media. More importantly, over the Co3O4 nanosheets, the electrooxidation from ethanol to ethyl acetate was so selective that no other oxidation products were yielded. With such a high selectivity, an electrolyzer cell using Co3O4 nanosheets as the anode electrocatalyst and Ni-Mo nanopowders as the cathode electrocatalyst has been successfully built for ethanol reforming. The electrolyzer cell was readily driven by a 1.5 V battery to achieve the effective production of both H2 and ethyl acetate. After the bulk electrolysis, about 95% of ethanol was electrochemically reformed into ethyl acetate. This work opens up new opportunities in designing a material system for building unique devices to generate both hydrogen and high-value organics at room temperature by utilizing electric energy from renewable sources.Keywords
Funding Information
- Ministry of Science and Technology of the People's Republic of China (2015CB932303)
- National Natural Science Foundation of China (21131005, 21227001, 2133300, 21390390, 21420102001)
This publication has 54 references indexed in Scilit:
- Semiconductor–Electrocatalyst Interfaces: Theory, Experiment, and Applications in Photoelectrochemical Water SplittingAccounts of Chemical Research, 2016
- Size Fractionation of Two‐Dimensional Sub‐Nanometer Thin Manganese Dioxide Crystals towards Superior Urea Electrocatalytic ConversionAngewandte Chemie, 2016
- Bifunctional non-noble metal oxide nanoparticle electrocatalysts through lithium-induced conversion for overall water splittingNature Communications, 2015
- Carbon Nanotubes Decorated with CoP Nanocrystals: A Highly Active Non‐Noble‐Metal Nanohybrid Electrocatalyst for Hydrogen EvolutionAngewandte Chemie, 2014
- High-Performance Silicon Photoanodes Passivated with Ultrathin Nickel Films for Water OxidationScience, 2013
- Nitrogen-doped carbon nanomaterials as non-metal electrocatalysts for water oxidationNature Communications, 2013
- Science, 2013
- Electrochemical reforming of ethanol–water solutions for pure H2 production in a PEM electrolysis cellInternational Journal of Hydrogen Energy, 2012
- A Perovskite Oxide Optimized for Oxygen Evolution Catalysis from Molecular Orbital PrinciplesScience, 2011
- A review on reforming bio-ethanol for hydrogen productionInternational Journal of Hydrogen Energy, 2007