Catalysis for Sustainable Chemistry and Energy, 2nd Volume

Topic Information

Dear Colleagues,

We are pleased to invite you, along with the members of your research group, to contribute to the forthcoming MDPI Topic, entitled “Catalysis for Sustainable Chemistry and Energy, 2nd Volume”. This Topic is a continuation of our previous successful publication, "Catalysis for Sustainable Chemistry and Energy".

This volume is related to the design and/or the development of catalysts which can minimize the adverse environmental impacts, such as greenhouse gas emissions, and avoid, simultaneously, the use and the generation of by-products with toxic and hazardous properties. Such aims can be achieved by means of tuning the chemical structure and composition of catalytic materials, which may also occur at an atomic and/or molecular scale, in a manner to enhance not only the reactants conversion but also their selectivity towards the desired products.

Papers and review papers dealing with all types of both homogeneous and heterogeneous catalysis, including organocatalysis, photocatalysis, electrocatalysis, environmental catalysis, biocatalysis/enzymes and nanostructured catalysis to promote selective conversions, fall within the scope of this Topic Issue.

Novel reactor or photoreactor configurations, such as catalytic reactors that combine the reaction and separation steps, or design and/or development of (photo)reactors for process intensification, such as microreactors membrane-based reactors and reactors using structured catalysts, also fall within the scope of this publication.

Dr. Vincenzo Vaiano
Dr. Olga Sacco
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Catalysts catalysts	3.9	6.3	2011	14.3 Days	CHF 2700	Submit
Chemistry chemistry	2.1	2.5	2019	19.1 Days	CHF 1800	Submit
Energies energies	3.2	5.5	2008	16.1 Days	CHF 2600	Submit
Nanomaterials nanomaterials	5.3	7.4	2010	13.6 Days	CHF 2900	Submit
Sustainability sustainability	3.9	5.8	2009	18.8 Days	CHF 2400	Submit

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All Catalysts Chemistry Energies Nanomaterials Sustainability

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12 pages, 2824 KiB  

Open AccessArticle

Photoelectrocatalytic Reduction of Cr(VI) in Wastewater with a CuBi₂O₄ Thin Film Photocathode

by Sai An, Ying Wang, Huajian Qiao, Hao Xiu, Deyu Liu and Yongbo Kuang

Catalysts 2024, 14(5), 289; https://doi.org/10.3390/catal14050289 - 25 Apr 2024

Viewed by 228

Abstract

Photoelectrocatalytic approaches show promise for contaminate removal in wastewater through redox reactions. However, the direct treatment of very low concentration heavy metals is a challenging task. Copper bismuth oxide is considered as a potential photocathode material due to its appropriate bandgap width and [...] Read more.

Photoelectrocatalytic approaches show promise for contaminate removal in wastewater through redox reactions. However, the direct treatment of very low concentration heavy metals is a challenging task. Copper bismuth oxide is considered as a potential photocathode material due to its appropriate bandgap width and excellent light absorption properties. In this work, we utilize copper bismuth oxide photoelectrodes with micrometer-scale pores to achieve the efficient and complete reduction of micromolar-level hexavalent chromium(VI) in wastewater. In a continuous 180 min experiment, the reduction rate of 5 µM hexavalent chromium reached 97%, which is an order lower than the drinking standard. Such a process was facilitated by the unique hierarchical microstructure of the oxide thin film and the porous morphology. On the other hand, the structural evolution during the operation was analyzed. A surface passivation was observed, suggesting the possible long-term practical application of this material. This study serves as an important reference for the application of photoelectrocatalysis in addressing Cr(VI) pollution in wastewater, with implications for improving water quality and environmental protection. Full article

(This article belongs to the Topic Catalysis for Sustainable Chemistry and Energy, 2nd Volume)

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16 pages, 5884 KiB  

Open AccessArticle

Evaluation of Pt-Co Nano-Catalyzed Membranes for Polymer Electrolyte Membrane Fuel Cell Applications

by Sethu Sundar Pethaiah, Arunkumar Jayakumar and Kalyani Palanichamy

Energies 2023, 16(23), 7713; https://doi.org/10.3390/en16237713 - 22 Nov 2023

Viewed by 746

Abstract

The membrane electrode assembly (MEA) encompassing the polymer electrolyte membrane (PEM) and catalyst layers are the key components in Polymer Electrolyte Membrane Fuel Cells (PEMFCs). The cost of the PEMFC stacks has been limiting its commercialization due to the inflated price of conventional [...] Read more.

The membrane electrode assembly (MEA) encompassing the polymer electrolyte membrane (PEM) and catalyst layers are the key components in Polymer Electrolyte Membrane Fuel Cells (PEMFCs). The cost of the PEMFC stacks has been limiting its commercialization due to the inflated price of conventional platinum (Pt)-based catalysts. As a consequence, the authors of this paper focus on developing novel bi-metallic (Pt-Co) nano-alloy-catalyzed MEAs using the non-equilibrium impregnation–reduction (NEIR) approach with an aim to reduce the Pt content, and hence, the cost. Herein, the MEAs are fabricated on a Nafion^® membrane with a 0.4 mg_Ptcm⁻² Pt:Co electrocatalyst loading at three atomic ratios, viz., 90:10, 70:30, and 50:50. The High Resolution-Scanning Electron Microscopic (HR-SEM) characterization of the MEAs show a favorable surface morphology with a uniform distribution of Pt-Co alloy particles with an average size of about 15–25 µm. Under standard fuel cell test conditions, an MEA with a 50:50 atomic ratio of Pt:Co exhibited a peak power density of 0.879 Wcm⁻² for H₂/O₂ and 0.727 Wcm⁻² for H₂/air systems. The X-ray diffractometry (XRD), SEM, EDX, Cyclic Voltammetry (CV), impedance, and polarization studies validate that Pt:Co can be a potential affordable alternative to high-cost Pt. Additionally, a high degree of stability in the fuel cell performance was also demonstrated with Pt₅₀:Co₅₀. Full article

(This article belongs to the Topic Catalysis for Sustainable Chemistry and Energy, 2nd Volume)

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