Nitrogen‐Doped Cobalt Oxide Nanostructures Derived from Cobalt–Alanine Complexes for High‐Performance Oxygen Evolution Reactions

Abstract

Taking advantage of the self-assembling function of amino acids, cobaltalanine complexes are synthesized by straightforward process of chemical precipitation. Through a controllable calcination of the cobalt-alanine complexes, N-doped Co 3 O 4 nanostructures (N-Co 3 O 4 ) and N-doped CoO composites with amorphous carbon (N-CoO/C) are obtained. These N-doped cobalt oxide materials with novel porous nanostructures and minimal oxygen vacancies show a high and stable activity for the oxygen evolution reaction. Moreover, the influence of calcination temperature, electrolyte concentration, and electrode substrate to the reaction are compared and analyzed. The results of experiments and density functional theory calculations demonstrate that N-doping promotes the catalytic activity through improving electronic conductivity, increasing OH − adsorption strength, and accelerating reaction kinetics. Using a simple synthetic strategy, N-Co 3 O 4 reserves the structural advantages of micro/nanostructured complexes, showing exciting potential as a catalyst for the oxygen evolution reaction with good stability.

Synthesis of Co0.5Mn0.1Ni0.4C2O4⋅n H2O Micropolyhedrons: Multimetal Synergy for High‐Performance Glucose Oxidation Catalysis

“…High‐performance catalytic devices have recently received a substantial amount of research attention and have been shown to have unique advantages . Therefore, it is essential to explore efficient and stable catalysts.…”

“…High-performance catalytic devices have recently received a substantial amount of research attention and have been shown to have unique advantages. [1][2][3][4][5] Therefore, it is essential to explore efficient ands table catalysts. Materials containing multiple metallic elements are more attractive from as cientific and technical point of view than single metal materials, and these materials are expected to exhibit new synergistic properties between the metals.…”

Hatted 1T/2H‐Phase MoS2 on Ni3S2 Nanorods for Efficient Overall Water Splitting in Alkaline Media

“…[19][20][21] Although water electrolysis has al ong history,c ontinuoust echnological improvement and materiali nnovation aimed at reducing costs remain huge challenges for industrial applications. [24,25] Recently,t ransition metal sulfides (TMS) such as MoS 2 , [26][27][28][29] Ni 3 S 2 , [30,31] NiS, [32] CoS, [33] Co 7 S 4 , [34] and so on, have been well investigated as satisfactory electrocatalysts. [24,25] Recently,t ransition metal sulfides (TMS) such as MoS 2 , [26][27][28][29] Ni 3 S 2 , [30,31] NiS, [32] CoS, [33] Co 7 S 4 , [34] and so on, have been well investigated as satisfactory electrocatalysts.…”

Li1.1V0.9O2/C Microspheres with Isomeric Core‐Shell structure and their Improved Lithium Storage Performance for Lithium‐Ion Batteries

“…Although lithium vanadium oxide shows a relatively low volume change (just 25 %),, which is slightly higher than commercial graphite and much lower than Si or Sn based, and transition oxide anode materials, its low electronic conductivity and severe cracks and fragmentations during the lithiation process lead to poor cycling stability ,. Some approaches, such as grain modification, carbon coating, metal ion doping and coupled with graphite, are employed to improve its cycling stability ,…”