journal article·2019-10-22

Markedly Enhanced Oxygen Reduction Activity of Single-Atom Fe Catalysts via Integration with Fe Nanoclusters

Xiang Ao, Wei Zhang, Zhishan Li, Jian-Gang Li, Luke Soule, Xing Huang, Wei-Hung Chiang, Hao Ming Chen, Chundong Wang, Meilin Liu, Xiao Cheng Zeng

ACS Nano· Volume 13· Issue 10
Publisher page

Abstract

Single-atom catalysts (SACs) have emerged as one of the most promising alternatives to noble metal-based catalysts for highly efficient oxygen reduction reaction (ORR). While SACs can offer notable benefits in terms of lowering overall catalyst cost, there is still room for improvement regarding catalyst activity. To this end, we designed and successfully fabricated an ORR electrocatalyst in which atomic clusters are embedded in an atomically dispersed Fe–N–C matrix (FeAC@FeSA–N–C), as shown by comprehensive measurements using aberration-corrected scanning transmission electron microscopy (AC-STEM) and X-ray absorption spectroscopy (XAS). The half-wave potential of FeAC@FeSA–N–C is 0.912 V (versus reversible hydrogen electrode (RHE)), exceeding that of commercial Pt/C (0.897 V), FeSA–N–C (0.844 V), as well as the half-wave potentials of most reported non-platinum-group metal catalysts. The ORR activity of the designed catalyst stems from single-atom active centers but is markedly enhanced by the presence of Fe nanoclusters, as confirmed by both experimental measurements and theoretical calculations.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Catalytic Processes in Materials Science · Nanomaterials for catalytic reactions

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China

School of Materials Science & Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States

Department of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States

Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China

Scientific Center for Optical and Electron Microscopy, ETH Zürich, Otto-Stern-Weg 3, Zürich 8093, Switzerland

Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan

Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan

Funding

Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · China Scholarship Council · National Natural Science Foundation of China · Hubei ?Chu-Tian Young Scholar? program

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