Plasma-engineered bifunctional cobalt–metal organic framework derivatives for high-performance complete water electrolysis

Abstract

Metal-organic frameworks (MOFs) derivatives are among the most promising catalysts for hydrogen evolution reaction (HER) for clean hydrogen energy production. Herein, we report the in-situ synthesized MOFs-derived CoPO hollow polyhedron...

Current progress in metal–organic frameworks and their derivatives for electrocatalytic water splitting

“…A MOF-derived CoPO hollow polyhedron nanostructure was conducted by Chen et al by subjecting the in situ synthesized MOF to high-temperature annealing and Ar–N 2 radio frequency plasma treatment. 95 The MOF was then filled with P and cooled in a tubular furnace, by adjusting the flow rate of Ar–N 2 gas, the Co–N bond inside the MOF was cut off, which allowed for the recombination of Co and P valence bond. The precise regulation of the P/O ratio significantly enhanced the electrocatalytic activity and stability of the catalyst.…”

Plasma modified and tailored defective electrocatalysts for water electrolysis and hydrogen fuel cells

“…The mixed N 2 and O 2 DBD plasma ensures the directional generation of amorphous CoO x clusters providing insights into designing amorphous electrocatalysts and beyond. Chen et al have reported in situ synthesis of MOF‐derived CoPO hollow polyhedron nanocatalysts by the Ar–N 2 RF plasma treatment with the P precursor and subsequent vacancy occupation by O 2 from the air at a low temperature 104 . The Ar‐N 2 RF plasma can be tuned to control the P/O ratio by cutting Co bonds in MOFs and reconnecting Co with P. Chen et al have proposed a universal strategy to prepare water splitting electrocatalysts based on rapid in situ evolution of amorphous precursor nanosheets 105 .…”

“…The improved overall reaction kinetics accounts for better water splitting. It has also been demonstrated that the O vacancies and P dopants in Co 3 O 4 lead to electron depletion on CoO and electron accumulation on P, causing a lower water adsorption energy and notably higher Fermi level which can trigger more and faster electron transfer in the electrochemical process 104 . With the help of the DBD plasma technology, 3 M (M = Ni, Fe, Co) sulfide nanosheets with dense NiCo nanodots have been fabricated as bifunctional electrocatalysts with low overpotentials and high stability 116 .…”

“…Chen et al have reported in situ synthesis of MOF-derived CoPO hollow polyhedron nanocatalysts by the Ar-N 2 RF plasma treatment with the P precursor and subsequent vacancy occupation by O 2 from the air at a low temperature. 104 The Ar-N 2 RF plasma can be tuned to control the P/O ratio by cutting Co bonds in MOFs and reconnecting Co with P. Chen et al have proposed a universal strategy to prepare water splitting electrocatalysts based on rapid in situ evolution of amorphous precursor nanosheets. 105 An energetic Ar plasma is utilized to attack the chemical bonds in the crystalline SrCo 0.85 Fe 0.1 P 0.05 O 3 -δ (SCFP) and deposit amorphous SCFP onto a nickel foam which serves as the support.…”

Plasma-activated tight and uniform grown of metal-organic frame-work on carbon cloth for stable Li metal anode

“…[32][33][34] Others applied plasma to implant N or oxygen vacancies containing active species on synthesized MOFs. [35][36][37] However, to our best knowledge, no work studied the effect of plasma on the growth of MOFs up to now. In this project, we applied oxygen plasma to activate carbon fiber and induce a tight and uniform growth of ZIF-8 for stable Li metal anode.…”