Controlled Synthesis of Hierarchical Nanostructured Metal Ferrite Microspheres for Enhanced Electrocatalytic Oxygen Evolution Reaction
Source abstract
Abstract
Ferrite MFe 2 O 4 (M = Ni, Co, etc.) metal oxides have been the focus of intense research, studied as promising electrocatalysts due to their good catalytic activity and stability for oxygen evolution reaction (OER). Structure engineering is a significant solution to achieve a high catalytic performance; further, optimizing the structure and specific surface area (SSA) of metal ferrite (CoFe 2 O 4 and NiFe 2 O 4 ) is regarded as a good choice. Herein, we designed hierarchical porous nanostructured CoFe 2 O 4 and NiFe 2 O 4 microspheres with the assistance of sodium dodecyl sulfonate by solvothermal and annealing methods. We found that three-dimensional microspheres assembled by nanoparticles and porous nanosheets exhibit higher SSAs for NiFe 2 O 4 (158.47 m 2 g –1 ) and CoFe 2 O 4 (144.52 m 2 g –1 ). Their higher SSA is much higher than those of other CoFe 2 O 4 -based and NiFe 2 O 4 -based materials. The as-prepared metal ferrite microspheres exhibit excellent OER electrocatalytic activity with lower Tafel slopes (55.2 and 58.2 mV dec –1 ) and lower overpotentials (235 and 280 mV) at a constant current density of 10 mA cm –2 and long-term stability, which is better than that of NiFe 2 O 4 and CoFe 2 O 4 bulks. This method for preparing a large SSA is expected to be applied in other spinel metal oxides.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Copper-based nanomaterials and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, Department of Materials Science & Engineering, Huaibei Normal University, Huaibei235000, P. R. China
Laboratory of Dielectric Functional Materials, School of Materials Science & Engineering, Anhui University, Hefei230601, China
Department of Agricultural and Biosystems Engineering, South Dakota State University, Brookings, South Dakota57007, United States
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing400714, PR China
Department of Chemistry, Tsinghua University, Beijing100084, P. R. China
Greenstar (Beijing) Environmental Technology Co., Ltd., Beijing100176, China
Funding
Natural Science Foundation of Chongqing · National Natural Science Foundation of China · Chinese Academy of Sciences · University Enterprise joint Research and Development Project · Key Natural Science Research Project for Colleges and Universities of Anhui Province · Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation, Huaibei Normal University
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