Scalable cellulose-sponsored functionalized carbon nanorods induced by cobalt for efficient overall water splitting

Amiinu, Ibrahim Saana; Pu, Zonghua; He, Daping; Monestel, Hellen Gabriela Rivera; Mu, Shichun

doi:10.1016/j.carbon.2018.05.025

Cited by 56 publications

(39 citation statements)

References 48 publications

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“…It is clear that the existence of crystalline Ni(OH) 2 can be confirmed by identifying the XRD peaks . In addition, the XPS pattern of starting Ni(OH) 2 nanosheets is observed to have a typical peak of 856.2 eV, associating with the Ni 2p3/2 core levels of Ni(OH) 2 , which indicates the presence of Ni 2+ phase here, as illustrated in Figure b ,,. Interestingly, as compared with the sample of Ni(OH) 2 @ Ni foam, the XRD peaks of Ni−B do not appear, suggesting the amorphous structure of as‐prepared Ni−B nanoparticles that is consistent with the previous literatures ,.…”

Section: Resultsmentioning

confidence: 99%

“…In order to overcome all the above‐mentioned issues, direct synthesis of nanostructured materials onto the surface of substrate (e. g., Ni foam) via hydrothermal method can be one of the most simple and flexible approaches, being advantageous to further scale up for industrial applications. In any case, until now, limited success has been obtained to extend the utilization of high‐surface‐area nanostructured transition metal‐based materials on Ni foam to achieve efficient electrocatalysts because such catalysts still exhibit the insufficient electrocatalytic activity as compared to other material systems ,…”

Section: Introductionmentioning

confidence: 99%

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Coupling of Nickel Boride and Ni(OH)₂ Nanosheets with Hierarchical Interconnected Conductive Porous Structure Synergizes the Oxygen Evolution Reaction

Liang

Dong

et al. 2018

ChemCatChem

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Earth‐abundant and highly‐efficient electrocatalysts for oxygen evolution reaction (OER) are urgently desired to realize the large‐scale storage and conversion of renewable energies. In this work, we develop a hierarchical porous electrocatalyst structure utilizing Ni(OH)2 nanosheets directly synthesized on Ni foam as the conductive and interconnected supports. By coupling with amorphous Ni−B nanoparticles, this hybrid catalyst exhibits dramatically enhanced electrocatalytic activities and durabilities towards OER. In specific, along with the optimized Ni−B loading, this catalyst requires only an impressively small overpotential of 300 mV to drive a current density of 100 mA cm−2 for oxygen evolution in 1 M KOH electrolyte. Meanwhile, it also yields a small Tafel slope of 49 mV dec−1 and a superior long‐term stability. All these results evidently indicate that the hierarchical hybridization of Ni−B with Ni(OH)2 on Ni foam can effectively synergize the oxygen evolution, opening up a new vista for designing high‐performance transition metal‐based nanostructures in the field of electrochemical water splitting.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coupling of Nickel Boride and Ni(OH)₂ Nanosheets with Hierarchical Interconnected Conductive Porous Structure Synergizes the Oxygen Evolution Reaction

Liang

Dong

et al. 2018

ChemCatChem

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“…The I D /I G ratio were calculated to be about 1.05 and 0.92 for NiFeNSC and CNF nanocarbon, respectively, suggesting the disorders and defects increased within the NiFeNSC catalyst. Additionally, the higher I D /I G ratio of NiFeNSC tends to indicate a homogeneous distribution of NiFe catalyst on the CNF nanocarbon …”

Section: Resultsmentioning

confidence: 99%

Natural‐Cellulose‐Nanofibril‐Tailored NiFe Nanoparticles for Efficient Oxygen Evolution Reaction

Tian

Liu

et al. 2019

ChemElectroChem

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High performance, resource abundance, and environmental friendliness have been raising as major challenges for the next‐generation of affordable and sustainable electrocatalysts. Herein, natural cellulose nanofibrils (CNFs) with abundant carboxyls and hydroxyls were employed to tailor NiFe catalysts (NiFeNSC) for the efficient oxygen evolution reaction (OER). Benefiting from the introduction of CNF, the NiFe metal ions were homogeneously dispersed on the CNF surface and exhibited a smaller particle size. Additionally, the surface area was 3.17 times larger and the surface wettability was significantly improved. By integrating the active NiFe nanoparticles with doped CNF, the overpotential of synthesized NiFeNSC catalyst was decreased from 370 mV to 244 mV to deliver a current density of 10 mA cm−2, and exhibited a small Tafel slope of 43.3 mV dec−1 in 1.0 M KOH electrolyte. Impressively, the NiFeNSC displayed excellent long‐term stability, which was only 38 mV increased over 24 h chronopotentiometry measurement, outperforming the catalyst without CNF (NiFeNS) and commercial RuO2 catalyst remarkably. The present results demonstrate a new avenue for designing resource abundant and sustainable electrocatalysts, providing a novel strategy to replace the fossil‐involved nanocarbon.

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“…Therefore, growing interesting is attracted on developing earth‐abundant and efficient catalysts for HER and OER. Furthermore, a single catalyst equipped with prominent multifunctional electrocatalytic activities and stabilities is more desirable …”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, a single catalyst equipped with prominent multifunctional electrocatalytic activities and stabilities is more desirable. [7][8][9][10] Recently, great progress has been made and various electrocatalysts for HER and OER have been fabricated, such as transition-metal based carbides, [11,12] nitrides, [12,13] oxides, [14,15] sulfides, [16][17][18] and phosphides. [19][20][21] Among the aforementioned catalysts, transition metal phosphides have exhibited high electrocatalytic activities for both HER and OER because that more electronegative P atoms can draw electrons from metal atoms, and act as Lewis base to work with proton in HER.…”

Section: Introductionmentioning

confidence: 99%

Porous Nitrogen Self‐Doped Carbon Wrapped Iron Phosphide Hollow Spheres as Efficient Bifunctional Electrocatalysts for Water Splitting

et al. 2019

ChemElectroChem

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In this work, a series of hybrid materials of N‐self‐doped carbon wrapped Fe2P/FeP hollow spheres were prepared by using a two‐step thermal conversion of precursors derived from the in situ coating of polyaniline on commercial Prussian blue. The precursors were pyrolyzed in N2 to form the N‐doped carbon coating on carbon‐iron materials; this was followed by subsequent phosphorization using NaH2PO2 as a phosphorus source, yielding the hybrid materials of N‐doped carbon wrapped Fe2P/FeP hollow spheres. The resulting hybrid materials showed high Brunauer‐Emmett‐Teller surface areas, pore volumes, and nitrogen contents, which were, more than 80 % pyridinic‐N. The hybrid materials were evaluated as electrocatalysts for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in 1.0 M KOH, and they have exhibited excellent electrocatalytic activities in the two reactions. In the case of the optimum sample, the 0.75‐NC−FexP catalyst, a low overpotential/Tafel slope of 193 mV/58 mV ⋅ dec−1 for HER and 302 mV/42 mV ⋅ dec−1 for OER were obtained. More importantly, the catalyst showed high catalytic activity for overall water splitting and only 1.63 V of cell voltage was needed to reach 10 mA/cm2 in a two‐electrode electrolyzer. The catalyst also exhibited robust long‐term durability and only a 16.0 % decrease in current density was observed after a 10 h chronoamperometric testing at 1.63 V. The results suggest that the sample is a promising alternative non‐precious‐metal catalyst for overall water splitting.

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Scalable cellulose-sponsored functionalized carbon nanorods induced by cobalt for efficient overall water splitting

Cited by 56 publications

References 48 publications

Coupling of Nickel Boride and Ni(OH)₂ Nanosheets with Hierarchical Interconnected Conductive Porous Structure Synergizes the Oxygen Evolution Reaction

Coupling of Nickel Boride and Ni(OH)₂ Nanosheets with Hierarchical Interconnected Conductive Porous Structure Synergizes the Oxygen Evolution Reaction

Natural‐Cellulose‐Nanofibril‐Tailored NiFe Nanoparticles for Efficient Oxygen Evolution Reaction

Porous Nitrogen Self‐Doped Carbon Wrapped Iron Phosphide Hollow Spheres as Efficient Bifunctional Electrocatalysts for Water Splitting

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Scalable cellulose-sponsored functionalized carbon nanorods induced by cobalt for efficient overall water splitting

Cited by 56 publications

References 48 publications

Coupling of Nickel Boride and Ni(OH)2 Nanosheets with Hierarchical Interconnected Conductive Porous Structure Synergizes the Oxygen Evolution Reaction

Coupling of Nickel Boride and Ni(OH)2 Nanosheets with Hierarchical Interconnected Conductive Porous Structure Synergizes the Oxygen Evolution Reaction

Natural‐Cellulose‐Nanofibril‐Tailored NiFe Nanoparticles for Efficient Oxygen Evolution Reaction

Porous Nitrogen Self‐Doped Carbon Wrapped Iron Phosphide Hollow Spheres as Efficient Bifunctional Electrocatalysts for Water Splitting

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Coupling of Nickel Boride and Ni(OH)₂ Nanosheets with Hierarchical Interconnected Conductive Porous Structure Synergizes the Oxygen Evolution Reaction

Coupling of Nickel Boride and Ni(OH)₂ Nanosheets with Hierarchical Interconnected Conductive Porous Structure Synergizes the Oxygen Evolution Reaction