Work

Green Synthesis of NiO Nanoparticles Using Waste Tea Extract and Their Utilization as Potential Electroanode for Ethanol Oxidation

Year: 2025

Type: article

Abstract: This study presents a novel approach, aimed at developing sustainable energy material. Green synthesis of nickel oxide nanoparticles (NiO NPs) is done using waste tea extract. The as‐synthesized NiO NPs are tested for electro‐oxidation of ethanol, demonstrating a notable reduction in overpotential at 0.44 V (in 1 M KOH + 1 M ethanol) from 0.67 V (in 1 M KOH) at a current density of 10 mA cm −2 . Comparative analysis with a benchmark platinum‐based electrocatalyst reveals that the green NiO‐NPs exhibited superior intrinsic kinetics and mechanistic performance, with a lower Tafel slope of 102 mV dec −1 and charge transfer resistance of 26 Ω. These results underline the efficiency and economic viability of using a bioinspired method for synthesizing NiO NPs, while also stressing the potential for upcycling waste tea. This innovative approach offers significant implications for the development of ecofriendly and sustainable energy conversion technologies.

Source: Energy Technology

DOI: 10.1002/ente.202500280

Authors: Kritika Sood, Arushi Arora, Aman K. K. Bhasin, Kuldip K. Bhasin, Menaka Jha

Institutions: Institute of Nano Science and Technology, Panjab University, Amity University

Language: English

Topic: Electrocatalysts for Energy Conversion

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDGs: Responsible consumption and production, Affordable and clean energy

Open Access status: bronze

Funders: Department of Science and Technology, Ministry of Science and Technology, India, Institute of Nano Science and Technology