Composition-adjustable Mo6Co6C2/Co@carbon nanocage for enhanced oxygen reduction and evolution reactions

Fan, Fangfang; Hui, Yanxing; Devasenathipathy, Rajkumar; Peng, Xinglan; Xu, Wentao; Yang, Fan; Liu, Xiaotian; Wang, Limin; Chen, Du-Hong; Fan, Youjun; Chen, Wei

doi:10.1016/j.jcis.2023.01.039

Cited by 43 publications

(23 citation statements)

References 53 publications

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“…This has prompted intense research efforts leading to the development of a series of cheap electrocatalysts with appreciable catalytic performance for OER, such as metal oxides, metal hydroxides, alloys, and carbon-based materials. − Among the various candidates, transition metals (TMs) have triggered significant interest as an alternative to promote the OER process. , In particular, materials based on metal–organic frameworks (MOFs) stand out for their highly porous structures with rich active metal sites and structure tunability by varying the metal centers and ligands. − However, unsatisfying electrical conductivity and catalytic activities are achieved; therefore, the design of MOFs with the optimal conductivity, mass transfer, and active site density is essential to realize their practical applications …”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Cadmium–Organic Framework with Dual Functions of Oxygen Evolution in Water Splitting and Fenton-like Photocatalytic Removal of Organic Pollutants

Wang

et al. 2023

Inorg. Chem.

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Metal−organic frameworks (MOFs) have exhibited appreciable potential as catalytic agents in the field of material science. The research of new MOFs with dual functions in electrocatalysis and photocatalysis under ultraviolet (UV) irradiation is extremely pivotal for renewable energy applications. Hence, we synthesized a series of three-dimensional MOFs, namely, [Cd(bimb) , and [Cd(bimb) 4 (ONO 2 ) 2 ] n (Cd-MOF 3) (bimb = 1,4-bis(imidazol-1-ylmethyl)benzene; H 2 ITA = 5hydroxyisophthalic acid), with applicability in the oxygen evolution reaction process and Fenton-like photocatalysis. The obtained results show that Cd-MOF 1 exhibited the most remarkable catalytic performance, affording a current density of 10 mA cm −2 at a very low overpotential of 279 mV and the smallest Tafel slope of 85.13 mV dec −1 . Meanwhile, these MOFs can generate hydroxyl radicals (•OH) under UV light irradiation with the existence of H 2 O 2 , enabling the rapid degradation of organic pollutants. This study provides a valuable direction for producing multifunctional and environmentally friendly catalysts.

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Section: Introductionmentioning

confidence: 99%

Three-Dimensional Cadmium–Organic Framework with Dual Functions of Oxygen Evolution in Water Splitting and Fenton-like Photocatalytic Removal of Organic Pollutants

Wang

et al. 2023

Inorg. Chem.

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“…Toward enhanced porosity and thus improved utilization efficiency, rational design approaches have been implemented such as the use of high-aspect-ratio precursors, − sacrificial templates, − pore-forming agents, , carbon-based composites, and polymer-based substrates with inherent porosity, ,− etc. Among these, use of polymer-based substrates for heteroatom-doped porous carbon appears to be more facile and straightforward. − …”

Section: Introductionmentioning

confidence: 99%

Highly Porous Polypyrrole (PPy) Hydrogel Support for the Design of a Co–N–C Electrocatalyst for Oxygen Reduction Reaction

Parida,

Barik,

Chalke

et al. 2023

ACS Appl. Mater. Interfaces

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Atomically dispersed metal−nitrogen−carbon (M−N− C) catalysts have emerged as one of the most promising platinum-group metal (PGM)-free cathode catalysts for oxygen reduction reaction (ORR). Among the various approaches to enhance the ORR performance of the catalysts, increasing the density of accessible active sites is of paramount importance. Thus, nitrogen-rich support with abundant porosity can be very propitious. Herein, we report a highly porous polypyrrole (PPy) hydrogel as a versatile support for the facile design of a Co−N−C electrocatalyst for ORR. The resulting Co−N−C catalyst with abundant micro-and mesoporous combinations demonstrates a half-wave potential (E 1/2 ) of 0.825 V vs reversible hydrogen electrode (RHE) in O 2 -saturated 0.1M KOH with just 2.1 wt % Co content. The ORR performance reduces only 11 mV (E 1/2 ) after 5000 cycles of accelerated durability test (ADT), portraying its excellent stability. The catalyst retains ≈83% of its original current during a short-term durability test at 0.8 V vs RHE for 25 h. Furthermore, the catalyst shows electron transfer approaching ≈4 with low H 2 O 2 yield in the potential range 0.5−0.9 V vs RHE. This work provides a simple design strategy to synthesize M−N−C catalysts with increased accessible active site density and enhanced mass transport for ORR and other electrocatalytic applications.

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“…However, the limited conductivity and active catalytic sites of Co 3 O 4 have hindered its practical applications. Hence, the nanostructural design [27][28][29][30][31][32] and exploring a conductive and ideally active support for Co 3 O 4 are skillful ways to improve the catalytic activity and stability. [33][34][35] Graphene as a most promising skeleton can generate high electron transport and provide a sufficient area for catalyst loading.…”

Section: Introductionmentioning

confidence: 99%

In situgrowth of Co₃O₄nanoparticles on nitrogen-doped reduced graphene oxide for high-efficiency oxygen reduction catalysis

Yang

Zhou

et al. 2023

New J. Chem.

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Composition-adjustable Mo6Co6C2/Co@carbon nanocage for enhanced oxygen reduction and evolution reactions

Cited by 43 publications

References 53 publications

Three-Dimensional Cadmium–Organic Framework with Dual Functions of Oxygen Evolution in Water Splitting and Fenton-like Photocatalytic Removal of Organic Pollutants

Three-Dimensional Cadmium–Organic Framework with Dual Functions of Oxygen Evolution in Water Splitting and Fenton-like Photocatalytic Removal of Organic Pollutants

Highly Porous Polypyrrole (PPy) Hydrogel Support for the Design of a Co–N–C Electrocatalyst for Oxygen Reduction Reaction

In situgrowth of Co₃O₄nanoparticles on nitrogen-doped reduced graphene oxide for high-efficiency oxygen reduction catalysis

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Composition-adjustable Mo6Co6C2/Co@carbon nanocage for enhanced oxygen reduction and evolution reactions

Cited by 43 publications

References 53 publications

Three-Dimensional Cadmium–Organic Framework with Dual Functions of Oxygen Evolution in Water Splitting and Fenton-like Photocatalytic Removal of Organic Pollutants

Three-Dimensional Cadmium–Organic Framework with Dual Functions of Oxygen Evolution in Water Splitting and Fenton-like Photocatalytic Removal of Organic Pollutants

Highly Porous Polypyrrole (PPy) Hydrogel Support for the Design of a Co–N–C Electrocatalyst for Oxygen Reduction Reaction

In situgrowth of Co3O4nanoparticles on nitrogen-doped reduced graphene oxide for high-efficiency oxygen reduction catalysis

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In situgrowth of Co₃O₄nanoparticles on nitrogen-doped reduced graphene oxide for high-efficiency oxygen reduction catalysis