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Catalysts
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Electrocatalytic Hydrogen and Oxygen Evolution Reaction
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Electrocatalytic Hydrogen and Oxygen Evolution Reaction

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Electrocatalysis".

Deadline for manuscript submissions: 31 July 2025 | Viewed by 566

Special Issue Editor

Dr. Yan Xie

E-Mail Website
Guest Editor
Dalian Institute of Chemical Physics, CAS, No. 457 Zhongshan Road, Dalian 116023, China
Interests: oxygen evolution reaction; oxygen reduction reaction; electrocatalysts; meal-air batteries; water splitting; carbon materials; fuel cells
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Oxygen evolution reaction (OER), as a fundamental half-reaction, is involved in water splitting and rechargeable metal-air batteries. While, the sluggish kinetics of its four-electron transfer process becomes a bottleneck to the performance enhancement. Thus, rational design and synthesis of electrocatalysts is of vital significance for boosting OER performances. Recently, developments and breakthroughs in experimental achievements on OER electrocatalysts are revealed. More perspectives and future directions are noticed and popular for further electrocatalytic performance enhancement and deeper understanding of design for electrocatalysts and principles. Here, extensive efforts are welcomed, which involves the following aspects:

(i) The novel synthesis of noble or non-noble metal electrocatalysts for boosting OER performances.
(ii) The deeper insights of the understanding on theoretical calculations for OER;
(iii) The efficient OER electrocatalysts that show outstanding OER performances for water splitting or metal-air batteries.

Dr. Yan Xie
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

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. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • oxygen evolution reaction
  • oxygen reduction reaction
  • electrocatalysts
  • metal-air batteries
  • water splitting
  • hydrogen evolution reaction

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Published Papers (2 papers)

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Research

20 pages, 4449 KiB  
Article
Boosting Dual Hydrogen Electrocatalysis with Pt/NiMo Catalysts: Tuning the Ni/Mo Ratio and Minimizing Pt Usage
by Luis Fernando Cabanillas-Esparza, Edgar Alonso Reynoso-Soto, Balter Trujillo-Navarrete, Brenda Alcántar-Vázquez, Carolina Silva-Carrillo and Rosa María Félix-Navarro
Catalysts 2025, 15(7), 633; https://doi.org/10.3390/catal15070633 (registering DOI) - 28 Jun 2025
Abstract
The development of efficient platinum group metal-free (PGM-free) catalysts for the hydrogen evolution reaction (HER) and the hydrogen oxidation reaction (HOR) is essential for advancing hydrogen-based energy technologies. In this study, NixMo100−x composites supported on Carbon Ketjenblack EC-300J (CK) were [...] Read more.
The development of efficient platinum group metal-free (PGM-free) catalysts for the hydrogen evolution reaction (HER) and the hydrogen oxidation reaction (HOR) is essential for advancing hydrogen-based energy technologies. In this study, NixMo100−x composites supported on Carbon Ketjenblack EC-300J (CK) were synthesized via thermal reduction under a controlled Ar/H2 (95:5) atmosphere to investigate the effect of the Ni/Mo molar ratio on electrocatalytic performance. Structural and morphological analyses by XRD and TEM confirmed the formation of the NiMo alloys and carbide phases with controlled particle size distributions (~18 nm), while BET measurements revealed specific surface areas up to 124.69 m2 g−1 for the Pt-loaded samples. Notably, the 3% Pt/Ni90Mo10-CK catalyst exhibited outstanding bifunctional activity in a half-cell configuration, achieving an overpotential of 65.2 mV and a Tafel slope of 41.6 mV dec−1 for the HER, and a Tafel slope of 32.9 mV dec−1 with an exchange current density of 1.03 mA cm−2 for the HOR. These results demonstrate that compositional tuning and minimal Pt incorporation synergistically enhance the catalytic efficiency, providing a promising platform for next-generation hydrogen electrocatalysts. Full article
(This article belongs to the Special Issue Electrocatalytic Hydrogen and Oxygen Evolution Reaction)
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15 pages, 2835 KiB  
Article
Template–Free–Induced Synthesis of an Fe–N–C Electrocatalyst with Porous Yolk–Shell Structure Towards Oxygen Reduction Reaction
by Lili Wang, Li Chen, Zhiwen Li, Shaohua Zhang, Hezhen Wang, Ling Xu and Yan Xie
Catalysts 2025, 15(4), 384; https://doi.org/10.3390/catal15040384 - 16 Apr 2025
Viewed by 396
Abstract
Significant research has focused on cost–effective, highly active, and exceptionally stable non–noble metal electrocatalysts (NNMEs) to boost the performance of the oxygen reduction reaction (ORR). Of note, the development of design and synthesis of Fe–N–C electrocatalysts is essential but remains challenging. Herein, the [...] Read more.
Significant research has focused on cost–effective, highly active, and exceptionally stable non–noble metal electrocatalysts (NNMEs) to boost the performance of the oxygen reduction reaction (ORR). Of note, the development of design and synthesis of Fe–N–C electrocatalysts is essential but remains challenging. Herein, the Fe and N co–doped porous carbon material with a yolk–shell (YS) structure, termed SA–H2TPyP@PDA–Fe (900), was fabricated by self–assembly of metal–free porphyrin as a yolk and polymerization of dopamine as a shell with an addition of iron salts, followed by the high–temperature pyrolysis and acid–leaching. As a result, active sites, like FeN4 and N–doped C, within rich porous YS carbon structures, play an important role for ORR in an alkaline media. The SA–H2TPyP@PDA–Fe (900) electrocatalyst shows positive ORR performances than those of SA–H2TPyP (900) and SA–H2TPyP@PDA (900), indicating the dominating function of the YS carbon structure decorated with Fe–based species. This efficient route of template–free–induced preparation of the YS structure discovers the design and synthesis of NNMEs for ORR. Full article
(This article belongs to the Special Issue Electrocatalytic Hydrogen and Oxygen Evolution Reaction)
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