Engineering NiS/Ni<sub>2</sub>P Heterostructures for Efficient Electrocatalytic Water Splitting

Xiao, Xin; Huang, Dekang; Fu, Yong Qing; Wen, Ming; Jiang, Xingxing; Lv, Xiaowei; Li, Man; Gao, Lin; Liu, Shuangshuang; Wang, Mingkui; Zhao, Chuan; Shen, Yan

doi:10.1021/acsami.7b16430

Cited by 315 publications

(153 citation statements)

References 55 publications

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“…The preparation of Ni 5 P 4 on carbon‐cloth substrates (denoted as Ni 5 P 4 /CC) was similar to our previous work (for details see the Supporting Information) . Figure S1 (see the Supporting Information) shows that the bare carbon cloth consists of overlapping microfibers and that the surface of the fiber is smooth.…”

Section: Resultssupporting

confidence: 55%

Highly Efficient Hydrogen Production Using a Reformed Electrolysis System Driven by a Single Perovskite Solar Cell

et al. 2019

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Efficient hydrogen production by a photovoltaic‐electrolysis cell (PV–EC) system requires a low electrolyzer overpotential and a high coupling efficiency between both the components. Herein, Ni5P4 is proposed as a cost‐effective bifunctional electrocatalyst for hydrogen evolution and hydrazine oxidation in a reformed electrolyzer. Experiments indicate that the electrolytic overpotential could be significantly reduced by replacing the oxygen evolution reaction with the hydrazine oxidation reaction at the anode. Furthermore, a scenario for hydrogen production is demonstrated by utilizing a stable and low‐cost perovskite solar cell (PSC) with a carbon back electrode to drive a reformed electrolyzer. Importantly, a single PSC can drive three reformed electrolyzers in series for hydrogen production by carefully matching the operating point of the electrolyzer with the maximum power point of the photovoltaic device, thereby, yielding a H2 evolution rate of 1.77 mg h−1 for the whole PV–EC system. This can be a potential starting point for hydrogen production using a single PSC‐driven electrolysis system.

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Section: Resultssupporting

confidence: 55%

Highly Efficient Hydrogen Production Using a Reformed Electrolysis System Driven by a Single Perovskite Solar Cell

et al. 2019

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“…As shown in Figure c and d, the BEs for S 2p 3/2 and S 2p 1/2 in Ni‐S−P NRs/NF exhibit a negative‐shift compared to that of Ni−S/NF, while the BEs of P 2p show a positive‐shift compared to that of Ni−P/NF. From the shift of binding energies, it can be deduced there is an interfacial charge redistribution, between Ni 3 S 2 and Ni 2 P, which could change the chemical properties of Ni 3 S 2 /Ni 2 P hybrid. Therefore, the catalytic activity of Ni‐S−P NRs/NF may improve.…”

Section: Resultsmentioning

confidence: 99%

“…The conflicts between human demand for energy and depletion of fossil fuels, as well as the impact of post‐combustion on the environment has made people more urgent in the development and utilization of renewable clean energy, such as hydrogen (H 2 ) ,. Although steam reforming process is the main technology of global H 2 production at present, this process still consumes nonrenewable fossil fuels and releases a large amount of harmful gas.…”

Section: Introductionmentioning

confidence: 99%

One‐step Synthesis of Self‐standing Ni₃S₂/Ni₂P Heteronanorods on Nickel Foam for Efficient Electrocatalytic Hydrogen Evolution over a Wide pH Range

Zhou

et al. 2018

ChemCatChem

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The development of efficient, stable and low‐cost electrocatalysts for hydrogen evolution reaction (HER) through a facile strategy is undoubtedly vital to realize sustainable production of H2 in water splitting but still challenging. Herein, we present a one‐step approach, a simultaneous phosphorization and sulfurization thermal treatment of NF at low temperature, to direct grow Ni‐S−P heteronanorod arrays consisting of Ni3S2 and Ni2P on nickel foam (Ni‐S−P NRs/NF). Due to the direct growth, one‐dimensional structure and good conductivity of the catalyst hybrid, as well as the synergistic effect between Ni3S2 and Ni2P, the resultant Ni‐S−P NRs/NF exhibited excellent HER electrocatalytic activity over a wide pH range. Ni‐S−P NRs/NF shows an overpotential of 180, 148 and 292 mV to reach the current density of 100 mA cm−2 in 1.0 M KOH, 0.5 M H2SO4 and 1.0 M PBS solution, respectively. DFT theoretical calculations was further confirmed that the superior pH‐universal HER activity of Ni‐S−P NRs/NF is originated from the thermo‐neutral hydrogen adsorption free energy and the enhanced adsorption of water molecular by the Ni3S2/Ni2P heterostructure.

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“…Highly efficient water electrolysis generally requires high-performance electrocatalysts with low overpotential, fast kinetics, and high stability. [9][10][11] Recently, transition-metal hydroxides, [7,12] phosphides, [8,[13][14][15][16] nitrides, [17,18] and chalcogenides [19][20][21][22] have been investigated as promising candidates for bifunctional electrocatalysts. [7,8] The search for earth-abundant, lowcost HER and OER electrocatalysts that are robust, have high activity and stability has triggered numerous efforts to replace noble metal-based materials.…”

Section: Introductionmentioning

confidence: 99%

3D Architectures of Quaternary Co‐Ni‐S‐P/Graphene Hybrids as Highly Active and Stable Bifunctional Electrocatalysts for Overall Water Splitting

Song

Yoon

et al. 2018

Advanced Energy Materials

110

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Developing low-cost, highly active, and stable bifunctional electrocatalysts is a challenging issue in electrochemical water electrolysis. Building on 3D architectured electrocatalysts through structural and compositional engineering is an effective strategy to enhance catalytic activities as well as stability and durability. Herein, 3D architectures of quaternary Co-Ni-S-P compounds coupled with graphene ((Co 1−x Ni x )(S 1−y P y ) 2 /G) electrocatalysts are proposed, in which nanosheets are self-assembled to form 3D architectures with round and flat doughnut-like shapes, toward overall water splitting. Benefiting from the 3D architectures and Ni, P substitution, (Co 1−x Ni x )(S 1−y P y ) 2 /G exhibits superior electrocatalytic activities with low overpotentials of 117 and 285 mV at 10 mA cm −2 and Tafel slopes of 85 and 105 mV dec −1 for hydrogen and oxygen evolution reactions, respectively, in alkaline media. In addition, minimal increases in overpotential are observed, even after the 10 000th voltammetric cycle and continuous chronopotentiometric testing over 50-100 h, confirming the high stability and durability of (Co 1−x Ni x )(S 1−y P y ) 2 /G. When used as both cathode and anode, (Co 1−x Ni x )(S 1−y P y ) 2 /G achieves excellent overall water splitting performance with a cell potential as low as 1.65 V, reaching a current density of 10 mA cm −2 with no obvious decay after 50 h, demonstrating that (Co 1−x Ni x )(S 1−y P y ) 2 /G is an efficient bifunctional electrocatalyst for overall water splitting.

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Engineering NiS/Ni₂P Heterostructures for Efficient Electrocatalytic Water Splitting

Cited by 315 publications

References 55 publications

Highly Efficient Hydrogen Production Using a Reformed Electrolysis System Driven by a Single Perovskite Solar Cell

Highly Efficient Hydrogen Production Using a Reformed Electrolysis System Driven by a Single Perovskite Solar Cell

One‐step Synthesis of Self‐standing Ni₃S₂/Ni₂P Heteronanorods on Nickel Foam for Efficient Electrocatalytic Hydrogen Evolution over a Wide pH Range

3D Architectures of Quaternary Co‐Ni‐S‐P/Graphene Hybrids as Highly Active and Stable Bifunctional Electrocatalysts for Overall Water Splitting

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Engineering NiS/Ni2P Heterostructures for Efficient Electrocatalytic Water Splitting

Cited by 315 publications

References 55 publications

Highly Efficient Hydrogen Production Using a Reformed Electrolysis System Driven by a Single Perovskite Solar Cell

Highly Efficient Hydrogen Production Using a Reformed Electrolysis System Driven by a Single Perovskite Solar Cell

One‐step Synthesis of Self‐standing Ni3S2/Ni2P Heteronanorods on Nickel Foam for Efficient Electrocatalytic Hydrogen Evolution over a Wide pH Range

3D Architectures of Quaternary Co‐Ni‐S‐P/Graphene Hybrids as Highly Active and Stable Bifunctional Electrocatalysts for Overall Water Splitting

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Engineering NiS/Ni₂P Heterostructures for Efficient Electrocatalytic Water Splitting

One‐step Synthesis of Self‐standing Ni₃S₂/Ni₂P Heteronanorods on Nickel Foam for Efficient Electrocatalytic Hydrogen Evolution over a Wide pH Range