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The Synthesis of Nanostructured Ni 5 P 4 Films and their Use as a Non‐Noble Bifunctional Electrocatalyst for Full Water Splitting
Author(s) -
Ledendecker Marc,
Krick Calderón Sandra,
Papp Christian,
Steinrück HansPeter,
Antonietti Markus,
Shalom Menny
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201502438
Subject(s) - bifunctional , electrocatalyst , water splitting , catalysis , oxygen evolution , phosphide , nickel , platinum , materials science , chemical engineering , inorganic chemistry , chemistry , nanotechnology , metallurgy , organic chemistry , electrochemistry , electrode , photocatalysis , engineering
The investigation of nickel phosphide (Ni 5 P 4 ) as a catalyst for the hydrogen (HER) and oxygen evolution reaction (OER) in strong acidic and alkaline environment is described. The catalyst can be grown in a 3D hierarchical structure directly on a nickel substrate, thus making it an ideal candidate for practical water splitting devices. The activity of the catalyst towards the HER, together with its high stability especially in acidic solution, makes it one of the best non‐noble materials described to date. Furthermore, Ni 5 P 4 was investigated in the OER and showed activity superior to pristine nickel or platinum. The practical relevance of Ni 5 P 4 as a bifunctional catalyst for the overall water splitting reaction was demonstrated, with 10 mA cm −2 achieved below 1.7 V.