articleAdvanced Functional MaterialsSep 1, 2023HYBRID OA

Coupling Adsorbed Evolution and Lattice Oxygen Mechanism in Fe‐Co(OH) 2 /Fe 2 O 3 Heterostructure for Enhanced Electrochemical Water Oxidation

SXSisi XinYTYu TangBJBaohua JiaZZZhengfu ZhangCLChengping Li

Kunming University of Science and Technology · Yunnan Normal University · +3 more institutions

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Abstract

Abstract Oxygen evolution reaction (OER) remains a bottleneck for electrocatalytic water‐splitting to generate hydrogen. However, the traditional adsorbed evolution mechanism (AEM) possesses sluggish reaction kinetics due to the scaling relationship, while lattice oxygen mechanism (LOM) triggers an unstable structure due to the escaping of lattice oxygen. Herein, a proof‐of‐concept Fe‐Co(OH) 2 /Fe 2 O 3 heterostructure is put forward, where Fe‐Co(OH) 2 following AEM can complete rapidly deprotonation process while Fe 2 O 3 following LOM can trigger O─O coupling step. Combining the theoretical and experimental investigation confirmed that the redistributed space‐charge of Fe‐Co(OH) 2 /Fe 2 O 3 junction can…

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Topics & keywords

Topics
Keywords
  • Oxygen evolution
  • Materials science
  • Electrocatalyst
  • Overpotential
  • Heterojunction
  • Oxygen
  • Electrochemistry
  • Water splitting
UN Sustainable Development Goals
  • Clean water and sanitation
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