Regulating the heteroatom doping in metallogel-derived Co@dual self-doped carbon onions to maximize electrocatalytic water splitting

Abstract

The effect of systematic heteroatom doping on carbon-coated metal nanoparticles in enhancing electrocatalytic OER activity was explored using a series of homogeneously dispersed cobalt nanoparticles encased in N,O-dual self-doped carbon onions.

Self-Templated Conversion of a Self-Healing Metallogel into an Active Carbon Quasiaerogel: Boosting Photocatalytic CO2 Reduction by Water

“…The PXRD study displays (Figure S10a, see Supporting Information) two broad humps at ∼27 and 45°, suggesting the amorphous nature of Nd@NCA and MF@NCA catalysts, respectively. Moreover, the Raman spectra (Figure S10b, see Supporting Information) of Nd@NCA showed two characteristic signature D and G bands of carbon at ∼1351 and 1556 cm –1 , respectively . Similarly, the metal-free MF@NCA catalyst exhibits D and G bands around 1343 and 1556 cm –1 , respectively.…”

“…Moreover, the Raman spectra (Figure S10b, see Supporting Information) of Nd@NCA showed two characteristic signature D and G bands of carbon at ∼1351 and 1556 cm −1 , respectively. 56 Similarly, the metal-free MF@NCA catalyst exhibits D and G bands around 1343 and 1556 Mott−Schottky plots of (d) Nd@NCA, (e) Nd@NCA-1, and (f) MF@NCA catalysts. (g) Experimental band alignment of Nd@NCA, Nd@NCA-1, and MF@NCA catalysts.…”

“…50 The metal–organic framework is exploited as a template for the preparation of the metal and heteroatom-enriched carbon aerogel materials. , Recently, these carbon-based materials have been considered as promising photocatalysts due to their high catalytic activity, high surface area, three-dimensional interconnected porosity, low density, long-term durability, high selectivity, and environmental benignness. − However, the preparation of the metal and heteroatom-enriched carbon aerogel materials via the metal–organic framework (MOF) and the traditional route is challenging . Therefore, it is desirable to prepare the metal (or metal-free) and heteroatom-enriched carbon aerogel materials by using metallogels via a feasible synthetic methodology …”

Brønsted Acid-Functionalized Ionic Co(II) Framework: A Tailored Vessel for Electrocatalytic Oxygen Evolution and Size-Exclusive Optical Speciation of Biothiols

“…Further, the roughness factor for 18a was calculated from the ratio of the EASA to the geometrical surface area of the working electrode (0.5 cm 2 ), which turned out to be 11.5 (see the Supporting Information for details). It is worth mentioning that the turnover frequency (TOF) was calculated to be remarkable at 0.02 s −1 , which is much superior to the majority of contemporary materials, 41,42 and eventually established the high efficiency of 18a in terms of catalytic activity and alkaline medium stability. To predict the structural variations in the electrocatalyst during successive cycling studies, PXRD and SEM analyses of the material after the OER were checked along with the chronoamperometry study.…”

Ir-Doped Co(OH)2 nanosheets as an efficient electrocatalyst for the oxygen evolution reaction

“…1,2 Electrolytic water technology, as an effective method capable of producing hydrogen qualitatively and quantitatively, is considered as the best choice for industrial large-scale production of hydrogen due to its advantages of renewability, sustainability and nonpolluting nature. 3,4 The electrolytic water process includes the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER); The breakage of O-H bonds and the formation of O-O bonds occurring in the OER reaction lead to a high overpotential during the OER, which fundamentally affects the practical application of electrolytic water technology in industry, therefore, the preparation of electrocatalysts that can promote the reaction rate of the OER is a challenge for many researchers. [5][6][7] At present, the electrocatalytic OER materials used in large-scale commercial water electrolysis are mainly noble metal-based materials, such as RuO 2 and IrO 2 , however, their extensive application is seriously restricted by the resource scarcity, therefore, there is still an urgent need to develop new and efficient catalysts synthesized from abundant elements.…”