Microtubular electrodes: An emerging electrode configuration for electrocatalysis, bioelectrochemical and water treatment applications
Article
Article Title | Microtubular electrodes: An emerging electrode configuration for electrocatalysis, bioelectrochemical and water treatment applications |
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ERA Journal ID | 3854 |
Article Category | Article |
Authors | Rabiee, Hesamoddin (Author), Ge, Lei (Author), Hu, Shihu (Author), Wang, Hao (Author) and Yuan, Zhiguo (Author) |
Journal Title | Chemical Engineering Journal |
Journal Citation | 450 (Part 1) |
Article Number | 138476 |
Number of Pages | 21 |
Year | 2022 |
Publisher | Elsevier |
Place of Publication | Netherlands |
ISSN | 1385-8947 |
1873-3212 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.cej.2022.138476 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S1385894722039584 |
Abstract | Electrochemical processes have attracted much attention as they can be empowered by renewable electricity for zero-emission processes under ambient conditions. Applications of electrochemistry in various areas such as electrocatalysis (e.g., water electrolysis, CO2 reduction), (waste)water treatment, fuel cells, and microbial processes have been recently emerging. Electrode design is a crucial feature in electrochemical systems. In some applications, porous electrodes are required to maximize the reaction sites and participate in reactants delivery, such as gas-diffusion electrodes (GDEs) for gas-phase electrolysis or membrane electrodes for water treatment. Planar shape porous electrodes are the conventional configuration with some drawbacks; for example, planar GDEs are made in multiple layers and are relatively complex to manufacture on large scales. Recently, microtubular (or hollow fiber) shape electrodes have been introduced as an alternative due to several advantages such as a higher active surface area to the volume ratio, small electrolyzer footprint, ease of processability, etc. This review presents a critical overview of the design and fabrication of microtubular electrodes and the structure-performance relationship. After that, the recent advances of microtubular electrodes in three main categories, including gas-phase electrocatalysis, (waste)water treatment, and bioelectrochemical systems, are discussed, with more focus on gas electrolysis wherein microtubular electrodes act as GDEs. GDEs for gas electrocatalysis are of great significance as they effectively boost reaction rate by continuously delivering reactant feeds to the reaction sites, resolving the issue of mass transport resistance, and microtubular GDEs can address several issues of planar GDEs. In the last section, future research opportunities are suggested to showcase the promises of microtubular electrodes as a versatile electrode configuration for electrochemical applications. |
Keywords | Electrode design; Microtubular electrodes; Electrocatalysis; Gas-diffusion electrode; Bioelectrochemical systems; Electrochemical water treatment |
ANZSRC Field of Research 2020 | 401605. Functional materials |
340301. Inorganic materials (incl. nanomaterials) | |
400404. Electrochemical energy storage and conversion | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Centre for Future Materials |
University of Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7q22/microtubular-electrodes-an-emerging-electrode-configuration-for-electrocatalysis-bioelectrochemical-and-water-treatment-applications
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