One-dimensional MoO₂–Co₂Mo₃O₈@C nanorods: a novel and highly efficient oxygen evolution reaction catalyst derived from metal–organic framework composites

Abstract

One-dimensional MoO-CoMoO@C nanorods were synthesized by using MoO@ZIF-67 composites as a precursor for the first time, and it is found that the CoMoO species and its composite have excellent OER activities. The MoO-CoMoO@C nanorods present favorable electrocatalytic advantages toward OER in alkaline solution, requiring an overpotential of only 320 mV to deliver a current density of 10 mA cm. In addition, the catalyst also shows a small Tafel slope of 88 mV dec and relatively good durability. The attractive OER performance can be attributed to the highly active CoMoO and MoO species and the unique structure of the catalyst. This strategy can be extended to design and synthesize other novel and highly efficient molybdenum based ternary metal oxides as OER catalysts.

Coupling Magnetic Single‐Crystal Co2Mo3O8 with Ultrathin Nitrogen‐Rich Carbon Layer for Oxygen Evolution Reaction

“…al) with stable OER performance and high electronic conductivity have received increasing attention. [12][13][14][15][16] A 2 Mo 3 O 8 mainly composed of two different metallic elements A and Mo, where Mo is in + 4 oxidation state and presents in O h sites, metal A attains oxidation state of + 2 and occupies both T d and O h sites. [17,18] It can serve as a remarkable OER catalyst owing to the following features: 1) controllable unique crystalline structure; 2) high conductance, the intracluter MoÀMo distances in the Mo 3 cluster (ca.…”

Designed formation of Co3O4@NiCo2O4 sheets-in-cage nanostructure as high-performance anode material for lithium-ion batteries

“…In the past two decades, metal-organic frameworks (MOFs) have been widely used as sacricial templates for the synthesis of functional materials. [19][20][21][32][33][34][35][36][37][38][39] The MOFs have some distinctive structural and compositional advantages, such as high porosity and easily controllable composition. Furthermore, the chemical and thermal instability makes the conversion reaction occur easily, that MOFs can transform to functional nanoparticles via a facile ion-exchange reaction or annealing treatment in a specic atmosphere.…”

“…As successful examples, 2-methylimidazole ligand in ZIF-67 can be easily replaced by S 2À , Se 2À and MoO 4 2À to form the corresponding CoS, 37 CoSe, 38 and CoMoO 4 hollow cages. 39 Such MOF-assisted synthetic strategy provides more possibilities to obtain functional materials with improved physical and chemical properties. Following the above considering, a new sheets-in-cage nanostructure composed by Co 3 O 4 nanosheets inside and NiCo 2 O 4 layer as outer shell has been designed and synthesized.…”

Molybdenum-Containing Metalloenzymes and Synthetic Catalysts for Conversion of Small Molecules

“…Ma and coworkers synthesized one-dimensional MoO 2 -Co 2 Mo 3 O 8 @C nanorods with the enlarged catalytic surface area [206]. The ZIF-67 MOF was attached to MoO 3 nanorods to form MoO 3 @ZIF-67, and subsequent hydrothermal reaction at 700 • C gave MoO 2 -Co 2 Mo 3 O 8 @C nanorods (containing Co/Mo in 9.1/10.5% ratio).…”