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Molybdenum and Phosphorous Dual‐Doped, Transition‐Metal‐Based, Free‐Standing Electrode for Overall Water Splitting
Author(s) -
Ali Usman,
Sohail Kamran,
Liu Yuqi,
Yu Xiaodan,
Xing Shuangxi
Publication year - 2021
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.202100217
Subject(s) - overpotential , water splitting , oxygen evolution , electrocatalyst , molybdenum , nanosheet , materials science , transition metal , catalysis , doping , nickel , electrode , chemical engineering , inorganic chemistry , nanotechnology , electrochemistry , chemistry , optoelectronics , metallurgy , biochemistry , photocatalysis , engineering
Water splitting using earth‐abundant, low‐cost, highly efficient, transition‐metal‐based electrocatalysts with high activity and stability is inevitable for sustainable energy development. Herein, a molybdenum (Mo) and phosphorous (P) co‐doped highly efficient and durable electrocatalyst is grown on nickel foam (P‐NiCo 2 O 4 /CoMoO 4 /NF, for simplicity G‐3) for hydrogen and oxygen evolution reactions (HER and OER, respectively). The dual doping of Mo and P prompts the formation of nanosheet array structures and modifies the surface electronic states, which subsequently enhance the active sites, facilitate the charge transfer, and accelerate the reaction kinetics. As a result, the G‐3 sample requires a low overpotential of 78.7 mV and 248.6 mV to reach a current density of 25 mA cm −2 for the HER and OER, respectively. Furthermore, a cell voltage of 1.729 V is required at 100 mA cm −2 , and the catalyst demonstrates long‐term stability of 54 h for overall water splitting.