Ternary copper molybdenum sulfide (Cu₂MoS₄) nanoparticles anchored on PANI/rGO as electrocatalysts for oxygen evolution reaction (OER)

Abstract

A trinuclear heterobimetallic complex with general formula [Cu(PPh 3 ) S 2 MoS 2 Cu(PPh 3 ) 2 ]ÁCHCl 3 (SSP) has been synthesized, and its characterization executed using FTIR, NMR, electronic absorption spectroscopies, and singlecrystal X-ray technique. The complex is solvothermally decomposed in octadecylamine (ODA) to yield ternary copper molybdenum sulfide nanoparticles and successfully grafted onto 2D materials, namely, reduced graphene oxide (rGO) or polyaniline (PANI), and these composites are utilized for oxygen evolution half-cell reaction (OER). The copper molybdenum sulfide nanoparticles as well as their composites with rGO and PANI and rGO + PANI were characterized using powder X-ray diffraction, SEM, and EDX analyses. Electrochemical measurements suggested that the modified electrodes have notable electrocatalytic activity toward OER with onset overpotential 400 mV for CMS + PANI and 395 mV for CMS + rGO + PANI. This is the first study on the use of copper molybdenum sulfide nanoparticles composites with rGO and PANI as electrocatalysts for OER displaying substantial synergistic activity.

Prussian blue analog‐derived bimetallic phosphide nanoparticles anchored in nitrogen‐doped porous electrospun carbon nanofibers for efficient oxygen evolution reaction

“…How to cite this article: A. Ren, B. Yu, Z. Liu, Appl Organomet Chem 2023, 37 (12), e7295. https:// doi.org/10.1002/aoc.7295…”

“…However, it exhibits sluggish kinetics and needs a large overpotential to drive, since the OER process concerns the formation of oxygen–oxygen bond and contains the complicated four‐electron‐transfer process 5–8 . Considering that, efficient OER electrocatalysts are desirable to facilitate reaction kinetics and reduce overpotential 9–13 . Some noble metal oxides as electrocatalysts, such as Ir and Ru oxides, can significantly promote the OER kinetics, whereas their high price and lack of availability have seriously restricted their large‐scale applications 14–19 .…”

“…[5][6][7][8] Considering that, efficient OER electrocatalysts are desirable to facilitate reaction kinetics and reduce overpotential. [9][10][11][12][13] Some noble metal oxides as electrocatalysts, such as Ir and Ru oxides, can significantly promote the OER kinetics, whereas their high price and lack of availability have seriously restricted their large-scale applications. [14][15][16][17][18][19] Therefore, developing OER electrocatalysts with rich reserve, low price, effective catalytic ability, and excellent durability is promising.…”

Recent Advances of Transition Metal Basic Salts for Electrocatalytic Oxygen Evolution Reaction and Overall Water Electrolysis

“…Till now, plenty of non-noble metal-based materials such as oxides [61][62][63][64], (oxy)hydroxides [65][66][67][68][69], sulfides [70][71][72], selenides [73][74][75], phosphides [76][77][78][79], phosphates [80][81][82] have been developed as efficient electrocatalysts towards OER. Among the reported electrocatalysts, transition metal hydroxides are the most conventional electrocatalysts, because they are easily prepared but exhibit high activity [83][84][85][86][87].…”