In situ growth of self-composed cerium iron oxide hierarchal structures as a novel anode electrocatalyst for direct methanol fuel cells
Source abstract
Abstract
Abstract Preparation of hierarchal structures of various dimensions in a single in-situ step is extremely challenging. However, they have gained huge attention for energy storage to electrocatalysis. Here, self-composed cerium iron oxide hierarchal structures are prepared using a novel in-situ process using urea as a ligand. The formed hierarchal structures are made of sheets, rods, and spherical particles. The deposition of the formed spherical particles on the surface of sheets and rods is observed. The prepared cerium iron oxide hierarchal structures are used as a catalyst for the electrooxidation of methanol. As an electrocatalyst, hierarchal structures showed a high specific current density of ∼274 mA cm–2. The observed onset potential for the cerium iron oxide is ∼0.44 V. The retention of ∼93.5% of the initial current density after 5000 consecutive seconds is observed. The iron present in cerium iron oxide hierarchal structures increases oxygen vacancies responsible for the observed superior methanol oxidation reaction activity. Results confirmed that hierarchal cerium iron oxide structures showed higher electrocatalytic activity than pristine cerium oxide and iron oxide materials.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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