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journal article·2025-04Open access

Rhodium‐Modified Glassy Carbon Electrode as a Promising Electrocatalyst for Oxygen Reduction Reaction in Phosphoric Acid Electrolytes

S. M. Nizam Uddin, Abrar Yasir Abir, Mohammad Imran Hossain, Nahida Akter, Motasim Bin Islam, Kentaro Aoki, Yuki Nagao, Shrikant S. Maktedar, Mostafizur Rahaman, Mohammad Abul Hasnat

ChemNanoMat· Volume 11· Issue 4
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Abstract

Abstract A low‐cost glassy carbon electrode (GCE), modified with minimum amount of noble metal rhodium (Rh) via electrodeposition method can sensibly enhance the electrocatalytic oxygen reduction reaction (ORR) in H3PO4 solution (pH∼2.0). The successful Rh electrodeposition was confirmed by using field emission scanning electron microscopy (FE‐SEM) and X‐ray photoelectron microscopy (XPS). The rotating disk electrode (RDE) technique was used in kinetic investigation to confirm the ORR mechanism followed by the 4e− transfer process, resulting in the production of water as the final product on the Rh‐GCE surface. This finding was further supported by rotating ring disk electrode (RRDE) analysis. The transfer coefficient (α) value was determined ∼0.36, indicated the protonation and electron transfer process in the rate‐limiting step of the ORR followed a concerted pathway. The exchange current density (j0) and standard rate constant (ko) were determined to be 1.09 × 10−4 A cm−2 and 2.35 × 10−4 cm s−1, respectively.
Source: crossref · Quality: baseline

Research context

Energy storageCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Conducting polymers and applications · Fuel Cells and Related Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry Graduate School of Physical Sciences Shahjalal University of Science and Technology Sylhet 3114 Bangladesh

Department of Chemistry Pabna University of Science and Technology Pabna 6600 Bangladesh

Department of Chemistry University of Barishal Barishal 8254 Bangladesh

School of Materials Science Japan Advanced Institute of Science and Technology 1-1 Asahidai Nomi Ishikawa 923-1292 Japan

Materials Chemistry & Engineering Research Laboratory, Department of Chemistry National Institute of Technology Srinagar 190006, J & K (UT) India

Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh 11451 Saudi Arabia

International Research Organization for Advanced Science and Technology Kumamoto University 2-39-1 Kurokami,Chuo-ku Kumamoto 860-8555 Japan

Funding

King Saud University · Shahjalal University of Science and Technology

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