Embedding Co2P nanoparticles into co-doped carbon hollow polyhedron as a bifunctional electrocatalyst for efficient overall water splitting

Li, Yan; Cui, Mengnan; Li, Tianjiao; Shen, Yu; Si, Zhenjun; Wang, Heng‐guo

doi:10.1016/j.ijhydene.2020.04.137

Cited by 47 publications

(12 citation statements)

References 51 publications

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“…It only needs 1.49 V to afford a current density of 10 mA cm À 2 (Figure 8a), which is better than most of Co-based electrocatalysts (Figure S7). [41][42][43][44][45][46][47][48][49][50][51][52][53][54] The stability of the electrolyzer was evaluated by the i-t chronoamperometry test. As shown in Figure 8b, the current density only shows a slight decay of 1.8 % during 15 h of electrolysis.…”

Section: Overall Water Splittingmentioning

confidence: 99%

Carbon Cloth Supported Nitrogen Doped Porous Carbon Wrapped Co Nanoparticles for Effective Overall Water Splitting

et al. 2021

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The key to the practical application of overall water splitting is to develop high-efficient non-noble metal electrocatalysts. Herein, carbon cloth supported N-doped porous carbon wrapped Co nanoparticles (CC@Co-NPC) are constructed with high bifunctional catalytic activity toward oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in alkaline medium. Benefiting from the exposure of abundant Co active sites, and the synergistic effect between Co particles and N-doped carbon species, the CC@Co-NPC delivers small overpotentials of 286 and 340 mV at 100 mA cm À 2 with Tafel values of 59 and 97 mV dec À 1 towards OER and HER, respectively.

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Section: Overall Water Splittingmentioning

confidence: 99%

Carbon Cloth Supported Nitrogen Doped Porous Carbon Wrapped Co Nanoparticles for Effective Overall Water Splitting

et al. 2021

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“…Hence, N-CNTs derived from MOFs via the bottom-up strategy have intrigued extensive attention for ORR application in recent years [29][30][31]. In addition, graphene can be employed as either host materials or active ingredients to improve ORR performance [32][33][34][35]. On the one hand, graphene oxide (GO) with a large specific surface area and good electrical conductivity is adopted as the conductive carbon support.…”

Section: Introductionmentioning

confidence: 99%

Self-catalyzed growth of Zn/Co-N-C carbon nanotubes derived from metal-organic frameworks as efficient oxygen reduction catalysts for Zn-air battery

et al. 2021

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Designing cost-effective and high-performance carbon-based oxygen reduction reaction (ORR) electrocatalysts is crucial in the development of Zn-air batteries (ZABs). In this study, a facile one-pot synthesis approach is engineered to construct Zn/Co-N-C carbonaceous polyhedrons interconnected with self-catalyzed-grown carbon nanotubes (CNTs) from zeolitic imidazolium frameworks linked with graphene oxide nanosheets. The special N-doped threedimensional (3D) carbon matrix allows manipulating the exposure of active sites and the synergistic interaction between metal nanoparticles and CNTs. The as-synthesized catalyst features impressive ORR activity in 0.1 mol L −1 KOH (E 1/2 = 0.83 V) and 0.5 mol L −1 H 2 SO 4 (E 1/2 = 0.73 V), satisfactory cycling stability and methanol resistance comparable to those of the benchmark Pt/C catalyst (E 1/2 = 0.80 V in 0.1 mol L −1 KOH, E 1/2 = 0.75 V in 0.5 mol L −1 H 2 SO 4 ). Furthermore, the asestablished ZAB demonstrates a competitive peak power density (90 mW cm −2 ) and prominent long-term stability, which are better than those of devices based on the commercial Pt/C catalyst (82 mW cm −2 ). This work provides promising guidance for fabricating highly effective ORR catalysts with in situ formed CNTs, which can be applied in portable ZABrelated devices.

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“…Zhou et al synthesized 3D porous heterogeneous electrocatalysts by compounding Mo–S–Se nanoparticles with abundant active edge sites on conductive and high-surface-area scaffolds (e.g., CoSe 2 and NiCoSe 2 supports), of which the cooperative interfaces and modified electronic states played crucial roles in the highly efficient HER performance. , Besides, the hollow structures exhibit substantially improved electrocatalytic activity, owing to the large active surface and spacious internal space for maximum exposure of the active sites, as well as abundant mass transfer paths . Furthermore, embedding nanomaterials in carbonaceous materials, − such as graphene, porous carbon, , and heteroatom-functionalized carbon shell ,, is demonstrated to significantly improve the electrical conductivity and stability. Chao et al fabricated a MoS 2 /PANI/rGO for excellent supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

Hollow Sandwiched Structure of Ni-Modified MoS₂ Wrapped into Symmetrical N-Doped Carbon toward a Superior Hydrogen Evolution Electrocatalyst

Luo

Wang

Xin

et al. 2021

ACS Sustainable Chem. Eng.

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As a promising cost-effective electrocatalyst for hydrogen evolution reaction (HER), molybdenum disulfide (MoS 2 ) has been drawing more attention. However, the desired performances are restricted by the poor conductivity and inadequate active sites. To address these obstructions, herein, we design and fabricate an intelligent sandwiched nanostructure of hierarchical hollow nanospheres, which are assembled by Nimodified MoS 2 nanosheets encapsulated into N-doped carbon layers (NC@MoS 2 /Ni-NC HNSs). The hybrid catalyst exhibits significantly increased electrical conductivity and active area, thereby maximally exposing the rich active sites. Additionally, the sandwiched hierarchy is favorable for preventing the agglomeration of the nanosheets to ensure the excellent stability. Consequently, such NC@MoS 2 /Ni-NC HNSs show brilliant HER performance with a delightful onset overpotential of ∼16.8 mV and a low overpotential of 82.1 mV to achieve a current density of 10 mA cm −2 in alkaline solution, together with the prominent long-term stability and durability for over 35 h. Theoretical studies underline that metallic Ni doping can not only tune the electronic structures and optimize the appropriate free energy of H* adsorption (ΔG H* ), but also release inert basal plane to activated sites, leading to the boosted HER performance.

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Embedding Co2P nanoparticles into co-doped carbon hollow polyhedron as a bifunctional electrocatalyst for efficient overall water splitting

Cited by 47 publications

References 51 publications

Carbon Cloth Supported Nitrogen Doped Porous Carbon Wrapped Co Nanoparticles for Effective Overall Water Splitting

Carbon Cloth Supported Nitrogen Doped Porous Carbon Wrapped Co Nanoparticles for Effective Overall Water Splitting

Self-catalyzed growth of Zn/Co-N-C carbon nanotubes derived from metal-organic frameworks as efficient oxygen reduction catalysts for Zn-air battery

Hollow Sandwiched Structure of Ni-Modified MoS₂ Wrapped into Symmetrical N-Doped Carbon toward a Superior Hydrogen Evolution Electrocatalyst

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Embedding Co2P nanoparticles into co-doped carbon hollow polyhedron as a bifunctional electrocatalyst for efficient overall water splitting

Cited by 47 publications

References 51 publications

Carbon Cloth Supported Nitrogen Doped Porous Carbon Wrapped Co Nanoparticles for Effective Overall Water Splitting

Carbon Cloth Supported Nitrogen Doped Porous Carbon Wrapped Co Nanoparticles for Effective Overall Water Splitting

Self-catalyzed growth of Zn/Co-N-C carbon nanotubes derived from metal-organic frameworks as efficient oxygen reduction catalysts for Zn-air battery

Hollow Sandwiched Structure of Ni-Modified MoS2 Wrapped into Symmetrical N-Doped Carbon toward a Superior Hydrogen Evolution Electrocatalyst

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Hollow Sandwiched Structure of Ni-Modified MoS₂ Wrapped into Symmetrical N-Doped Carbon toward a Superior Hydrogen Evolution Electrocatalyst