Recent Advancements in Nanostructured Electro/Photocatalysts for Environmental and Energy Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Environmental Nanoscience and Nanotechnology".

Deadline for manuscript submissions: 31 May 2024 | Viewed by 1222

Special Issue Editors


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Guest Editor
Department of Environmental Science and Engineering, Keimyung University, 1095, Dalgubeol-daero, Dalseo-gu, Daegu 42601, Republic of Korea
Interests: fuel cells; electrochemistry; oxygen reduction reaction; oxygen evolution reaction; water electrolysis
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Guest Editor Assistant
Department of Chemistry, NIT Warangal, Warangal 506004, Telangana, India
Interests: nanoscience and nanotechnology; materials chemistry, synthesis of nanostructured materials such as metal oxides, metal chalcogenides, mxenes, metal–organic-framework-derived materials; carbon materials and their composites; electrocatalysis, energy storage and conversion systems such as supercapacitors (solid-state) and fuel cells (MOR and ORR); electrochemical water splitting (OER and HER); electrochemical sensors; water purification

Special Issue Information

Dear Colleagues,

Nanostructured materials as “electrocatalysts and photocatalysts” have shown great potential as electro-photocatalysts for environmental and energy applications due to their unique physical and chemical properties such as high surface area, enhanced charge transport, tunable bandgap and Improved stability over bulk materials. Electrocatalysts play crucial roles in various energy generation, storage, and conversion applications, such as fuel cells, batteries, and electrolyzers. Electrocatalysts with high levels of activity improve energy efficiency and enhance performance by reducing the potential for electrochemical reactions. In addition, cost-effective electrocatalysts with the same or higher electrocatalytic activity levels as those of commercially available electrodes are required to reduce the associated costs and eventually enable successful commercialization.

On the other hand, photocatalysts are materials that can harness light energy to drive chemical reactions in various environmental interests such as (i) air purification—removing harmful pollutants such as VOCs, NOx, and SOx; (ii) water purification—removing harmful pollutants such as pharmaceuticals, dyes, pesticides, herbicides etc.; (iii) self-cleaning surfaces; (iv) renewable energy—photoelectrochemical water splitting, etc.

This Special Issue invites the submission of original research articles/short communications/long review articles on all aspects of electrocatalysts for energy generation, storage, and conversion technologies together with photocatalysts for environmental applications.

Dr. Shaik Gouse Peera
Guest Editor

Dr. Gaddam Rajeshkhanna
Guest Editor Assistant

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

  • fuel cells
  • batteries
  • supercapacitors
  • solar cells
  • microbial/biofuel cells
  • photocatalysis
  • photocatalytic degradation of contaminants

Published Papers (1 paper)

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Research

20 pages, 6456 KiB  
Article
Xerogel-Derived Manganese Oxide/N-Doped Carbon as a Non-Precious Metal-Based Oxygen Reduction Reaction Catalyst in Microbial Fuel Cells for Energy Conversion Applications
by Wu Hao, Sang-Hun Lee and Shaik Gouse Peera
Nanomaterials 2023, 13(22), 2949; https://doi.org/10.3390/nano13222949 - 15 Nov 2023
Cited by 1 | Viewed by 937
Abstract
Current study provides a novel strategy to synthesize the nano-sized MnO nanoparticles from the quick, ascendable, sol-gel synthesis strategy. The MnO nanoparticles are supported on nitrogen-doped carbon derived from the cheap sustainable source. The resulting MnO/N-doped carbon catalysts developed in this study are [...] Read more.
Current study provides a novel strategy to synthesize the nano-sized MnO nanoparticles from the quick, ascendable, sol-gel synthesis strategy. The MnO nanoparticles are supported on nitrogen-doped carbon derived from the cheap sustainable source. The resulting MnO/N-doped carbon catalysts developed in this study are systematically evaluated via several physicochemical and electrochemical characterizations. The physicochemical characterizations confirms that the crystalline MnO nanoparticles are successfully synthesized and are supported on N-doped carbons, ascertained from the X-ray diffraction and transmission electron microscopic studies. In addition, the developed MnO/N-doped carbon catalyst was also found to have adequate surface area and porosity, similar to the traditional Pt/C catalyst. Detailed investigations on the effect of the nitrogen precursor, heat treatment temperature, and N-doped carbon support on the ORR activity is established in 0.1 M of HClO4. It was found that the MnO/N-doped carbon catalysts showed enhanced ORR activity with a half-wave potential of 0.69 V vs. RHE, with nearly four electron transfers and excellent stability with just a loss of 10 mV after 20,000 potential cycles. When analyzed as an ORR catalyst in dual-chamber microbial fuel cells (DCMFC) with Nafion 117 membrane as the electrolyte, the MnO/N-doped carbon catalyst exhibited a volumetric power density of ~45 mW m2 and a 60% degradation of organic matter in 30 days of continuous operation. Full article
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