Enhanced Electrocatalytic Activity of Murdochite-Type Ni6MnO8 for Water Oxidation via Surface Reconstruction
Source abstract
Abstract
Ni–Mn-based binary oxides are deemed as prospective electrocatalysts for water oxidation. Here, a murdochite-type Ni6MnO8 electrocatalyst for water oxidation is reported. Murdochite-type Ni6MnO8 with hollow sphere (NMO-HS) and microflower (NMO-MF) structures has been controllably synthesized. After an in-situ activation process, the NMO-MF affords a superior activity for oxygen evolution reaction in 0.1 M KOH. A low overpotential of 370 mV at 10 mA cm–2 is obtained, and the mass activity of activated NMO-MF is 1.96 times that of commercial IrO2/C. As revealed by in-situ Raman spectra, Ni species in activated NMO-MF act as intrinsic active sites, and the in-situ formed NiOOH on the surface during the activation process is identified to contribute to the significantly enhanced catalytic activity. The Zn–air battery assembled with a NMO-MF cathode showed an exceptional power density (0.228 W cm–2) and long-term cycling stability (148 h).
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced Memory and Neural Computing · Advanced Photocatalysis Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, China
Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University, Suzhou 215006, China
Funding
Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Key Laboratory of Spectrochemical Analysis & Instrumentation
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