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Efficient Electrocatalytic Oxygen or Hydrogen Evolution

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Electrochemistry".

Deadline for manuscript submissions: closed (30 June 2024) | Viewed by 617

Special Issue Editors


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Guest Editor
School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai, Guangdong, 519000, China
Interests: nanocomposites; metal-organic frameworks; carbon-based materials; oxygen evolution reaction; water/seawater splitting; electrocatalytic mechanism

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Guest Editor
1. School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, 510006 China; 2. Center for Catalysis and Clean Energy, School of Environment and Science, Gold Coast Campus, Griffith University, QLD 4222, Australia
Interests: energy chemistry; nanomaterial chemistry; analytical chemistry; electrochemistry

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Guest Editor
School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, China
Interests: nanocomposites; electrocatalytic oxygen or hydrogen Evolution; efficient ORR catalyst; fuel cells; electrocatalytic mechanism

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Guest Editor
School of Materials Science and Engineering, Henan Normal University, Xinxiang, Henan 453007, China
Interests: electrocatalytic oxidation; self-supporting catalysts; water splitting; fuel cells; Zn-air batteries

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Guest Editor
School of Pharmacy, Guangxi Medical University, Nanning 530021, China
Interests: MOF nanomaterials; energy storage and conversion; biomedical technology; controlled synthesis; loading and delivery of drug molecules

Special Issue Information

Dear Colleagues,

The electrocatalytic hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) via water splitting have been recognized as a promising approach to alleviate the energy crisis and environmental pollution, which has attracted the attention of many researchers in recent decades. However, due to the sluggish kinetics of HER and OER under various electrolyte environments, the practical efficiency of water splitting is extremely limited. Moreover, the complexity of the catalyst–electrolyte interface makes the intrinsic HER/OER mechanisms difficult to understand. Recently, for the HER and OER, the best-performing electrocatalysts remain dominated by precious metals, such as Pt-, Ir-, and Ru-based materials. Therefore, developing promising electrocatalysts with a low cost and high performance and revealing the catalytic mechanism are desired.

This Special Issue entitled “Efficient Electrocatalytic Oxygen or Hydrogen Evolution” will focus on the state of the art and outlooks for electrocatalytic water splitting. Submissions in the form of original research papers and review articles in the areas of designing novel HER/OER electrocatalysts, developing new electrocatalytic systems, and finding new mechanisms are all welcome.

Dr. Dandan Cai
Prof. Dr. Shanqing Zhang
Dr. Xiulin Yang
Dr. Xupo Liu
Prof. Dr. Jin Huang
Guest Editors

Manuscript Submission Information

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Keywords

  • oxygen evolution reaction
  • hydrogen evolution reaction
  • water/seawater splitting
  • electrocatalytic reaction
  • efficient electrocatalysts
  • electrocatalytic mechanism
  • nanocomposite materials
  • metal-organic frameworks

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Published Papers (1 paper)

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Research

11 pages, 4073 KiB  
Article
Rational Construction of Honeycomb-like Carbon Network-Encapsulated MoSe2 Nanocrystals as Bifunctional Catalysts for Highly Efficient Water Splitting
by Changjie Ou, Zhongkai Huang, Xiaoyu Yan, Xiangzhong Kong, Xi Chen, Shi Li, Lihua Wang and Zhongmin Wan
Molecules 2024, 29(16), 3877; https://doi.org/10.3390/molecules29163877 - 16 Aug 2024
Viewed by 385
Abstract
The scalable fabrication of cost-efficient bifunctional catalysts with enhanced hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performance plays a significant role in overall water splitting in hydrogen production fields. MoSe2 is considered to be one of the most promising candidates [...] Read more.
The scalable fabrication of cost-efficient bifunctional catalysts with enhanced hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) performance plays a significant role in overall water splitting in hydrogen production fields. MoSe2 is considered to be one of the most promising candidates because of its low cost and high catalytic activity. Herein, hierarchical nitrogen-doped carbon networks were constructed to enhance the catalytic activity of the MoSe2-based materials by scalable free-drying combined with an in situ selenization strategy. The rationally designed carbonaceous network-encapsulated MoSe2 composite (MoSe2/NC) endows a continuous honeycomb-like structure. When utilized as a bifunctional electrocatalyst for both HER and OER, the MoSe2/NC electrode exhibits excellent electrochemical performance. Significantly, the MoSe2/NC‖MoSe2/NC cells require a mere 1.5 V to reach a current density of 10 mA cm−2 for overall water splitting in 1 M KOH. Ex situ characterizations and electrochemical kinetic analysis reveal that the superior catalytic performance of the MoSe2/NC composite is mainly attributed to fast electron and ion transportation and good structural stability, which is derived from the abundant active sites and excellent structural flexibility of the honeycomb-like carbon network. This work offers a promising pathway to the scalable fabrication of advanced non-noble bifunctional electrodes for highly efficient hydrogen evolution. Full article
(This article belongs to the Special Issue Efficient Electrocatalytic Oxygen or Hydrogen Evolution)
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