Porous MoP network structure as co-catalyst for H2 evolution over g-C3N4 nanosheets

Liu, Wei; Shen, Jun; Liu, Qinqin; Yang, Xiaofei; Tang, Hua

doi:10.1016/j.apsusc.2018.08.189

Cited by 128 publications

(48 citation statements)

References 69 publications

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“…Transition metal phosphides (TMPs) possess great potentials as cheap and efficient electrocatalytic materials for largescale production of hydrogen. [4][5][6] The negatively charged P atoms in TMPs can not only capture protons as Lewis bases, but also effectively promote the desorption of H 2 from the active sites. Particularly, recent studies have shown that cobalt phosphides could act as bifunctional catalysts toward HER and OER, [7,8] through heteroatoms doping, [9,10] MOF coupling, [11,12] anodic electrochemical treating, [13] and hetero-structure engineering.…”

Section: Introductionmentioning

confidence: 99%

Ammonium Nitrate‐Assisted Low‐Temperature Synthesis of Co, Co₂P@CoP Embedded in Biomass‐Derived Carbons as Efficient Electrocatalysts for Hydrogen and Oxygen Evolution Reaction

et al. 2020

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Electrochemical water splitting into H 2 and O 2 provides a promising and sustainable strategy for the future production of clean energy. Herein, we report an ammonium nitrate (AN)assisted synthetic strategy to prepare Co, Co 2 P@CoP nanoparticles embedded in biomass-derived porous carbons as bifunctional electrodes for water splitting. The use of AN is not only activating biomass to porous carbons, but also reducing the synthetic temperature significantly. The synergistic effects of the Co 2 P@CoP heterostructure could lead to a low adsorption energy of hydrogen (ΔG H*) and conduction band bending, together with the N/S-codoped porous carbons could provide large specific surface area and desirable electrondonating feature, contribute to the remarkable performance with overpotentials of 0.129 and 0.212 V for hydrogen evolution reaction (HER) in 0.5 mol L À 1 H 2 SO 4 and 1 mol L À 1 KOH, and 0.328 V for oxygen evolution reaction (OER) in 1 mol L À 1 KOH, at a current density of 10 mA cm À 2. Moreover, the Co 2 P@CoP/PC catalysts enable overall water splitting with a small cell voltage of 1.63 V to achieve 10 mA cm À 2 and exhibit long-term durability over 1000 min.

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Section: Introductionmentioning

confidence: 99%

Ammonium Nitrate‐Assisted Low‐Temperature Synthesis of Co, Co₂P@CoP Embedded in Biomass‐Derived Carbons as Efficient Electrocatalysts for Hydrogen and Oxygen Evolution Reaction

et al. 2020

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“…In order to furtheri mprove the photocatalytic activity of g-C 3 N 4 ,s ome research progress have been done, for example (i)microstructure modification; [11] (ii)forming ah eterojunction with other semiconductors; [12] (iii) copolymerization with organic monomers; [13] (iv) co-catalyst modification. [14][15][16] Loading co-catalyst on the surface of photosensitizers could inhibitt he photo-generated carriers recombination and improve the rate of photocatalytic hydrogen production. [17,18] Recently,t he preparation of co-catalyst has achieved al eapfrog progress from noble metal (Ru, Pt, Au) to non-noblem etal.…”

Section: Introductionmentioning

confidence: 99%

Highly Dispersed and Small‐Sized Nickel(II) Hydroxide Co‐Catalyst Prepared by Photodeposition for Hydrogen Production

Zhang

Dong

Jiang

et al. 2019

Chemistry An Asian Journal

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Photodeposition has been widely used as a mild and efficient synthetic method to deposit co‐catalysts. It is also worth studying how to synthesize non‐noble metal photocatalysts with uniform dispersion. Different synthetic conditions in photodeposition have a certain influence on particle size distribution and photocatalytic activity. Therefore, we designed experiments to prepare the inexpensive composite photocatalyst Ni(OH)2/g‐C3N4 by photodeposition. The Ni(OH)2 co‐catalysts disperse uniformly with particle sizes of about 10 nm. The photocatalytic hydrogen production rate of Ni(OH)2/g‐C3N4 reached about 19 mmol g−1 h−1, with the Ni(OH)2 deposition amount about 1.57 %. During 16 h stability testing, the rate of hydrogen production did not decrease significantly. The composite catalyst also revealed a good hydrogen production performance under sunlight. The Ni(OH)2 co‐catalyst enhanced the separation ability of photogenerated carriers, which was proved by surface photovoltage and fluorescence analysis.

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“…Over the past few years, numerous earth‐abundant, noble‐metal‐free compounds have been explored as ideal HER co‐catalysts for the construction of 2D g‐C 3 N 4 ‐based heterojunction photocatalysts . Among them, transition metal phosphides, such as Ni 2 P, CoP and MoP, have been widely employed as a suitable alternative to the noble‐metal‐based co‐catalysts. Recently, the use of FeP as the co‐catalyst for the improved HER was also explored due to the fact that Fe element is the most abundant transition metal, and the surface charge state of Fe atoms can be modulated by the vacant 3d orbital and/or 3p lone pair electrons of P atoms, promoting more dynamic d‐electrons to converge on the surface of ultrafine FeP nanoparticles .…”

Section: Introductionmentioning

confidence: 99%

Constructing 0D FeP Nanodots/2D g‐C₃N₄ Nanosheets Heterojunction for Highly Improved Photocatalytic Hydrogen Evolution

et al. 2019

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Two-dimensional polymeric graphitic carbon nitride (2D g-C 3 N 4 ) nanostructures have emerged as a very promising family of photocatalysts for hydrogen evolution from water. Nonetheless, fast recombination of photogenerated charge carriers and the sluggish kinetics of hydrogen evolution reaction (HER) result in unsatisfied solar-to-hydrogen efficiency. It is thus greatly encouraging to explore low-cost and high-performance cocatalysts to accelerate the charge transport and to improve the catalytic performance. In this work, for the first time, we report on the fabrication of ultra-small zero-dimensional (0D) FeP nanodots anchored on layered 2D g-C 3 N 4 nanosheets with welldefined nanostructures and intimate 0D/2D contact interface.The outstanding feature of the material is that the obtained multidimensional heterojunction photocatalysts reveal highly efficient visible-light-responsive HER performance in the absence of noble metals. Under an optimal percentage of 4 wt. % FeP, the FeP/g-C 3 N 4 hybrid showed a remarkable hydrogenevolving rate of 215 μmol g À 1 h À 1 and excellent recycling stability, surpassing noble-metal Pt modified g-C 3 N 4 (155 μmol g À 1 h À 1 ). The enhancement in HER activity is attributed to the synergistic effects of FeP nanocrystals on the improvement of light-harvesting property in the visible light region and the acceleration of charge carrier dynamics by wellconstructed interfaces.

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Porous MoP network structure as co-catalyst for H2 evolution over g-C3N4 nanosheets

Cited by 128 publications

References 69 publications

Ammonium Nitrate‐Assisted Low‐Temperature Synthesis of Co, Co₂P@CoP Embedded in Biomass‐Derived Carbons as Efficient Electrocatalysts for Hydrogen and Oxygen Evolution Reaction

Ammonium Nitrate‐Assisted Low‐Temperature Synthesis of Co, Co₂P@CoP Embedded in Biomass‐Derived Carbons as Efficient Electrocatalysts for Hydrogen and Oxygen Evolution Reaction

Highly Dispersed and Small‐Sized Nickel(II) Hydroxide Co‐Catalyst Prepared by Photodeposition for Hydrogen Production

Constructing 0D FeP Nanodots/2D g‐C₃N₄ Nanosheets Heterojunction for Highly Improved Photocatalytic Hydrogen Evolution

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Porous MoP network structure as co-catalyst for H2 evolution over g-C3N4 nanosheets

Cited by 128 publications

References 69 publications

Ammonium Nitrate‐Assisted Low‐Temperature Synthesis of Co, Co2P@CoP Embedded in Biomass‐Derived Carbons as Efficient Electrocatalysts for Hydrogen and Oxygen Evolution Reaction

Ammonium Nitrate‐Assisted Low‐Temperature Synthesis of Co, Co2P@CoP Embedded in Biomass‐Derived Carbons as Efficient Electrocatalysts for Hydrogen and Oxygen Evolution Reaction

Highly Dispersed and Small‐Sized Nickel(II) Hydroxide Co‐Catalyst Prepared by Photodeposition for Hydrogen Production

Constructing 0D FeP Nanodots/2D g‐C3N4 Nanosheets Heterojunction for Highly Improved Photocatalytic Hydrogen Evolution

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Ammonium Nitrate‐Assisted Low‐Temperature Synthesis of Co, Co₂P@CoP Embedded in Biomass‐Derived Carbons as Efficient Electrocatalysts for Hydrogen and Oxygen Evolution Reaction

Ammonium Nitrate‐Assisted Low‐Temperature Synthesis of Co, Co₂P@CoP Embedded in Biomass‐Derived Carbons as Efficient Electrocatalysts for Hydrogen and Oxygen Evolution Reaction

Constructing 0D FeP Nanodots/2D g‐C₃N₄ Nanosheets Heterojunction for Highly Improved Photocatalytic Hydrogen Evolution