Electron Redistribution in Iridium–Iron Dual-Metal-Atom Active Sites Enables Synergistic Enhancement for H2O2 Decomposition
Source abstract
Abstract
Developing efficient heterogeneous H 2 O 2 decomposition catalysts under neutral conditions is of great importance in many fields such as clinical therapy, sewage treatment, and semiconductor manufacturing but still suffers from low intrinsic activity and ambiguous mechanism understanding. Herein, we constructed activated carbon supported with an Ir–Fe dual-metal-atom active sites catalyst (IrFe-AC) by using a facile method based on a pulsed laser. The electron redistribution in Ir–Fe dual-metal-atom active sites leads to the formation of double reductive metal active sites, which can strengthen the metal–H 2 O 2 interaction and boost the H 2 O 2 decomposition performance of Ir–Fe dual-metal-atom active sites. Ir–Fe dual-metal-atom active sites show a high second-order reaction rate constant of 3.53 × 10 6 M –1 ·min –1, which is ∼10 6 times higher than that of Fe 3 O 4 . IrFe-AC is effective in removing excess intracellular reactive oxygen species, protecting DNA, and reducing inflammation under oxidative stress, indicating its therapeutic potential against oxidative stress-related diseases. This study could advance the mechanism understanding of H 2 O 2 decomposition by heterogeneous catalysts and provide guidance for the rational design of high-performance catalysts for H 2 O 2 decomposition.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Catalytic Processes in Materials Science · Advanced Nanomaterials in Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration, Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Institute of Environment and Ecology, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, People’s Republic of China
Institute of Materials Research, Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, People’s Republic of China
Environmental Protection Key Laboratory of Microorganism Application and Risk Control, Environmental Simulation and Pollution Control State Key Joint Laboratory, Beijing Laboratory for Environmental Frontier Technologies, School of Environment, Tsinghua University, Beijing 100084, People’s Republic of China
Funding
Tsinghua Shenzhen International Graduate School · Science, Technology and Innovation Commission of Shenzhen Municipality · National Natural Science Foundation of China · Guangdong Higher Education Institutions Innovative Research Team of Urban Water Cycle and Ecological Safety
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