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A Facile Electrosynthesis of Terephthalate (tp)‐Based Metal‐Organic Framework, Ni 3 (OH) 2 (H 2 O) 2 (tp) 2 with Superior Catalytic Activity for Hydrogen Evolution Reaction
Author(s) -
Liu Li,
Hai Yang,
Gong Yun
Publication year - 2020
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202000729
Subject(s) - nanosheet , overpotential , chemistry , electrosynthesis , metal organic framework , catalysis , density functional theory , metal , electrolysis , inorganic chemistry , crystallography , electrochemistry , electrode , adsorption , organic chemistry , computational chemistry , electrolyte
Utilizing a facile one‐step electrodeposition method, several terephthalate (tp)‐based MOFs, M 3 (OH) 2 (H 2 O) 2 (tp) 2 (M = Ni, Co or Fe) have been synthesized on Ni foam (NF) or carbon cloth (CC). Among the MOFs, Ni‐MOF/NF shows porous nanosheet arrays on NF and exhibits extraordinary hydrogen evolution reaction (HER) catalytic activity with an overpotential (η 10 ) of 60 mV to reach a current density of –10 mA cm –2 , which is superior to Co‐MOF/NF (η 10 = 184 mV) and Fe‐MOF/NF (η 10 = 203 mV), and even comparable to Pt/C (η 10 = 23 mV), indicating the HER performance is associated with the species of metal ions and the morphology. In addition, it is primarily investigated the formation mechanism of Ni‐MOF nanosheet arrays on Ni foam. Furthermore, Ni‐MOF/NF can endure 50 h‐electrolysis test at –20 mA cm –2 in alkaline condition. Density functional theory (DFT) calculations identify the active site of Ni3(OH) 2 (H 2 O) 2 (tp) 2 for HER is the O‐site from the coordinated ‐OH group (ΔG H =–0.40 eV) rather than the O‐site from the coordinated H 2 O molecule (ΔG H = –1.75 eV).