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Highly Efficient and Stable Water‐Oxidation Electrocatalysis with a Very Low Overpotential using FeNiP Substitutional‐Solid‐Solution Nanoplate Arrays
Author(s) -
Qian Manman,
Cui Shengsheng,
Jiang Daochuan,
Zhang Lei,
Du Pingwu
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201704075
Subject(s) - overpotential , tafel equation , electrocatalyst , materials science , water splitting , oxygen evolution , catalysis , chemical engineering , electrochemistry , cyclic voltammetry , noble metal , inorganic chemistry , electrode , metal , chemistry , metallurgy , organic chemistry , photocatalysis , engineering
The development of efficient water‐oxidation electrocatalysts based on inexpensive and earth‐abundant materials is significant to enable water splitting as a future renewable energy source. Herein, the synthesis of novel FeNiP solid‐solution nanoplate (FeNiP‐NP) arrays and their use as an active catalyst for high‐performance water‐oxidation catalysis are reported. The as‐prepared FeNiP‐NP catalyst on a 3D nickel foam substrate exhibits excellent electrochemical performance with a very low overpotential of only 180 mV to reach a current density of 10 mA cm −2 and an onset overpotential of 120 mV in 1.0 m KOH for the oxygen evolution reaction (OER). The slope of the Tafel plot is as low as 76.0 mV dec −1 . Furthermore, the long‐term electrochemical stability of the FeNiP‐NP electrode is investigated by cyclic voltammetry (CV) at 1.10–1.55 V versus reversible hydrogen electrode (RHE), demonstrating very stable performance with negligible loss in activity after 1000 CV cycles. This present FeNiP‐NP solid solution is thought to represent the best OER catalytic activity among the non‐noble metal catalysts reported so far.