Affiliation:
1. School of Materials Science and Engineering Harbin Institute of Technology Harbin Heilongjiang 150001 P. R. China
2. School of Chemistry and Chemical Engineering Harbin Institute of Technology Harbin Heilongjiang 150001 P. R. China
Abstract
AbstractDeveloping high‐performance electrocatalysts for oxygen evolution reaction (OER) is crucial in the pursuit of clean and sustainable hydrogen energy, yet still challenging. Herein, a spontaneous redox strategy is reported to achieve iridium single‐atoms anchored on hierarchical nanosheet‐based porous Fe doped β‐Ni(OH)2 pyramid array electrodes (SAs Ir/Fe‐β‐Ni(OH)2), which exhibits high OER performance with a low overpotential of 175 mV at 10 mA cm−2 and a remarkable OER current density in alkaline electrolyte, surpassing Fe‐β‐Ni(OH)2/NF and IrO2 by 31 and 38 times at 1.43 V versus RHE, respectively. OER catalytic mechanism demonstrates that the conversion of *OH→*O and the active lattice O content can be significantly improved due to the modulation effect of the Ir single atoms on the local electronic structure and the redox behavior of FeNi (oxy) hydroxide true active species. This work provides a promising insight into understanding the OER enhancement mechanism for Ir single‐atoms modified FeNi‐hydroxide systems.
Funder
National Natural Science Foundation of China
National Basic Research Program of China
Natural Science Foundation of Heilongjiang Province
Cited by
1 articles.
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