articleAdvanced MaterialsJan 3, 2024BRONZE OA

In Situ Reconstruction of High‐Entropy Heterostructure Catalysts for Stable Oxygen Evolution Electrocatalysis under Industrial Conditions

JHJue HuTGTianqi GuoXZXinyu ZhongJLJiong LiYMYunjie Mei

Kunming University of Science and Technology · International Iberian Nanotechnology Laboratory · +5 more institutions

PubMed
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Abstract

Abstract Despite of urgent needs for highly stable and efficient electrochemical water‐splitting devices, it remains extremely challenging to acquire highly stable oxygen evolution reaction (OER) electrocatalysts under harsh industrial conditions. Here, a successful in situ synthesis of FeCoNiMnCr high‐entropy alloy (HEA) and high‐entropy oxide (HEO) heterocatalysts via a Cr‐induced spontaneous reconstruction strategy is reported, and it is demonstrated that they deliver excellent ultrastable OER electrocatalytic performance with a low overpotential of 320 mV at 500 mA cm −2 and a negligible activity loss after maintaining at 100 mA cm −2 for 240 h. Remarkably, the heterocatalyst holds outstanding long‐term…

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211
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15

Topics & keywords

Topics
Keywords
  • Oxygen evolution
  • Overpotential
  • Electrocatalyst
  • Materials science
  • Heterojunction
  • High entropy alloys
  • Electrochemistry
  • Water splitting
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