CoP Nanoframes as Bifunctional Electrocatalysts for Efficient Overall Water Splitting

Transition-metal phosphides have been shown to be promising electrocatalysts in water for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). To maximize reactivity toward both entails limiting the catalyst size while maintaining reactivity and avoiding aggregation. Frame-like hollow nanostructures (nanoframes) provide the required open structure with sufficient channels into the interior volume. We demonstrate here the design and synthesis of CoP nanoframes (CoP NFs) by a strategy involving precipitation, chemical etching, and low-temperature phosphidation steps. It results in impressive bifunctional catalytic activities for both HER and OER and consequently enables a highly efficient…

• NN
  National Natural Science Foundation of China

  Awards: 21573160, 51703166, 21872105
• MO
  Ministry of Education of the People's Republic of China
• SA
  Science and Technology Commission of Shanghai Municipality

  Award: 14DZ2261100
• NS
  Natural Science Foundation of Zhejiang Province

  Award: LQ20B030001