Facile synthesis of three-dimensional porous nitrogen doped carbon supported Co 3 O 4 for oxygen reduction reaction and oxygen evolution reaction

Single cobalt sites in mesoporous N-doped carbon matrix for selective catalytic hydrogenation of nitroarenes

“…After high-temperature pyrolysis and SiO2 leaching, Co@mesoNC exhibits a SBET of 1230 m 2 g -1 and Vpore of 1.54 cm 3 g -1 . At the same time, the N2 adsorption-desorption isotherms of Co@mesoNC change to type IV with type H3 hysteresis that closes at P/P0 ≈ 0.4, suggesting the presence of mesoporous structure inside the nanoparticles [64,65]. Co K-edge X-ray absorption spectroscopy (XAS) measurements were carried out to further explore the local environment of cobalt in the Co@mesoNC sample.…”

Transition metal oxides with perovskite and spinel structures for electrochemical energy production applications

“…Hybrid materials formed by carbon materials and Co 3 O 4 spinel showed a promising catalytic behavior for both ORR (Liang et al, 2011;Wang et al, 2013;Liu et al, 2020b) and OER (Xu et al, 2016;Yao et al, 2016;Leng et al, 2017). For this reason, diverse studies focused on the development of bifunctional catalysts with optimized performance for both reactions (Wang et al, 2017b;Zhao et al, 2017b;Jia et al, 2017Jia et al, , 2019Su et al, 2019;Guo et al, 2019;Tomon et al, 2021). N-doped carbon materials were used in most of these works (Wang et al, 2017b;Jia et al, 2017Jia et al, , 2019Guo et al, 2019) because they offer specific active sites that improve the ORR avoiding the agglomeration of metal oxide nanoparticles.…”

“…For this reason, diverse studies focused on the development of bifunctional catalysts with optimized performance for both reactions (Wang et al, 2017b;Zhao et al, 2017b;Jia et al, 2017Jia et al, , 2019Su et al, 2019;Guo et al, 2019;Tomon et al, 2021). N-doped carbon materials were used in most of these works (Wang et al, 2017b;Jia et al, 2017Jia et al, , 2019Guo et al, 2019) because they offer specific active sites that improve the ORR avoiding the agglomeration of metal oxide nanoparticles. Moreover, a strong synergy between N functional groups and Co 3 O 4 was observed.…”

“…Moreover, a strong synergy between N functional groups and Co 3 O 4 was observed. That effect improves considerably the electron transfer and hence the catalytic activity (Wang et al, 2017b;Guo et al, 2019). Su et al (2019) and Tomon et al (2021) focused their efforts in enhancing the electrical conductivity and the catalytic activity by synthesizing materials with oxygen vacancies and, thus, favoring the adsorption and dissociation of O 2 .…”

Co3O4/C and Au supported Co3O4/C nanocomposites – Peculiarities of fabrication and application towards oxygen reduction reaction

“…In the past decades, researches have directed much effort toward replacing Pt-based catalysts with other metals or metal oxides. Cobalt oxides or hybrid materials consisting of Co 3 O 4 deposited on different carbon (carbon black, graphene, nitrogen-doped graphene) surfaces were proposed for oxygen reduction in fuel cells because of their high electrocatalytic activity and superior stability to Pt in alkaline media [6][7][8][9][10][11][12][13][14]. S.-M. Kim et al investigated the activity of Ag@Co 3 O 4 core-shell hybrid nanocrystals towards ORR in a 0.1 M NaOH solution [13].…”