Design of Manganese‐Doped Zinc Oxide Nanoparticles as Effective Electrocatalytic System in Oxygen Reduction Reactions

Author:

Noor Shaista1ORCID,Ahmad Fawad1ORCID,Khan Muhammad Imran2,Shanableh Abdallah23ORCID,Khan Shakir4,Manzoor Suryyia5ORCID,Osman Sameh M.6,Luque Rafael78

Affiliation:

1. Department of Chemistry University of Wah Rawalpindi Punjab Pakistan

2. Research Institute of Sciences and Engineering (RISE) University of Sharjah Sharjah UAE

3. Scientific Research Center Australian University Kuwait Kuwait

4. Ibn‐e‐Sina Institute of Technology Islamabad Pakistan

5. Institute of Chemical Sciences Bahauddin Zakariya University Multan Pakistan

6. Department of Chemistry, College of Science King Saud University Riyadh Saudi Arabia

7. National University of Science and Technology Polytehnica Bucharest Bucharest Romania

8. Universidad ECOTEC Samborondón Ecuador

Abstract

ABSTRACTFuel cell technologies constitute a clean, reliable, highly efficient, and eco‐friendly source of alternative energy generation. However, they still require a reliable and robust catalytic system showing comparative electrochemical activity to precious metal Pt with less cost. In this work, Mn@ZnO NPs were synthesized using a hydrothermal‐assisted simple method. Several techniques including SEM, TGA, and XRD were used to confirm the material synthesis. Electrochemical properties were analyzed by using linear sweep voltammetry, chronoamperometry, and cyclic voltammetry. A higher ORR activity in terms of mass activity and current density was observed 133.9 mA/mg as compared to Pt/C (96 mA/mg) and Pd/C (67 mA/mg) under otherwise identical conditions. Mn@ZnO also exhibited excellent current density (1.913 mA cm−2), comparable to Pt/C (1.55 mA cm−2). Chronoamperometry shows stability for up to 800 s. Comparative studies were conducted in both acidic and basic mediums, with observed higher ORR activity in acidic media.

Funder

King Saud University

Publisher

Wiley

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