Hydrogen evolution reaction activity of nickel phosphide is highly sensitive to electrolyte pH

Zhou, Zheng; Wei, Li; Wang, Yanqing; Karahan, H. Enis; Chen, Zibin; Lei, Yaojie; Chen, Xuncai; Zhai, Shengli; Liao, Xiaozhou; Chen, Yuan

doi:10.1039/c7ta06000a

Cited by 105 publications

(60 citation statements)

References 59 publications

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“…Hence, alternative catalysts based on earth‐abundant elements, such as metal alloys, transition metal chalcogenides, phosphides, and carbides, have been developed in the area of water splitting research. Due to their high electrocatalytic activity and outstanding electrical conductibility, Ni‐based metal alloys have been regarded as promising electrocatalysts for hydrogen evolution reaction (HER) . NiCu alloys have shown great potential in alkaline HER owing to their high corrosion resistance, excellent stability, and high HER efficiency .…”

Section: Introductionmentioning

confidence: 99%

Synergistic Nanotubular Copper‐Doped Nickel Catalysts for Hydrogen Evolution Reactions

Sun

Dong

Wang

et al. 2018

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Developing highly active electrocatalysts with low cost and high efficiency for hydrogen evolution reactions (HERs) is of great significance for industrial water electrolysis. Herein, a 3D hierarchically structured nanotubular copper-doped nickel catalyst on nickel foam (NF) for HER is reported, denoted as Ni(Cu), via facile electrodeposition and selective electrochemical dealloying. The as-prepared Ni(Cu)/NF electrode holds superlarge electrochemical active surface area and exhibits Pt-like electrocatalytic activity for HER, displaying an overpotential of merely 27 mV to achieve a current density of 10 mA cm and an extremely small Tafel slope of 33.3 mV dec in 1 m KOH solution. The Ni(Cu)/NF electrode also shows excellent durability and robustness in both continuous and intermittent bulk water electrolysis. Density functional theory calculations suggest that Cu substitution and the formation of NiO on the surface leads to more optimal free energy for hydrogen adsorption. The lattice distortion of Ni caused by Cu substitution, the increased interfacial activity induced by surface oxidation of nanoporous Ni, and numerous active sites at Ni atom offered by the 3D hierarchical porous structure, all contribute to the dramatically enhanced catalytic performance. Benefiting from the facile, scalable preparation method, this highly efficient and robust Ni(Cu)/NF electrocatalyst holds great promise for industrial water-alkali electrolysis.

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Section: Introductionmentioning

confidence: 99%

Synergistic Nanotubular Copper‐Doped Nickel Catalysts for Hydrogen Evolution Reactions

Sun

Dong

Wang

et al. 2018

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“…The binding energy at 398.9 eV, 400.2 eV, 401.1, 402.9 can be consistent with pyridinic N, pyrrolic N, graphitic N and oxidized N in the catalyst [28,48]. The peak centered at 853.3 eV accompanied by a satellite peak at 859.0 eV corresponds to Ni 2p 3/2, and the peak at 871.3 eV together with a satellite peak at 877.1 eV is in line with Ni 2p 1/2 (Figure 4c), which are in good consistence with the characteristic peaks of Ni signals in Ni 2 P [17,28,49]. Besides, the binding energy of P 2p at 129.40 eV in Figure 4d is typical of metal-P bonds (i.e., Ni 2 P) [38].…”

Section: Resultsmentioning

confidence: 59%

“…Besides, the binding energy of P 2p at 129.40 eV in Figure 4d is typical of metal-P bonds (i.e., Ni 2 P) [38]. The binding energy at 133.10 eV can be attributed to the phosphorus with a higher oxide state of phosphate at the surface [49,50,51]. In addition, XPS results also reveal that the mass ratio of Ni 2 P is about 21% in Ni 2 P/NC-60 (Table S1).…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Well-Dispersed Ni2P on N-Doped Nanomesh Carbon Matrix as a High-Efficiency Electrocatalyst for Alkaline Hydrogen Evolution Reaction

et al. 2019

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The development of non-noble metal hydrogen evolution catalysts that can replace Pt is crucial for efficient hydrogen production. Herein, we develop a type of well-dispersed Ni2P on N-doped nanomesh carbon (NC) electrocatalyst by a facile pyrolysis method, which shows excellent hydrogen evolution reaction (HER) catalytic performance. It is rather remarkable that the overpotential of Ni2P/NC prepared under optimal proportion is 108 mV at 10 mA·cm−2 current density in 1 M KOH solution with the tafel slope of 67.3 mV·dec−1, the catalytic activity has no significant attenuation after 1000 cycles of cyclic voltammetry (CV)method. The hydrogen evolution performance of the electrocatalytic is better than most similar catalysts in alkaline media. The unique mesh structure of the carbon component in the catalyst facilitates the exposure of the active site and reduces the impedance, which improves the efficiency of electron transport as well as ensuring the stability of the hydrogen evolution reaction. In addition, we prove that nitrogen doping and pore structure are also important factors affecting catalytic activity by control experiments. Our results show that N-doped nanomesh carbon, as an efficient support, combined with Ni2P nanoparticles is of great significance for the development of efficient hydrogen evolution electrodes.

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“…It is expected that the phosphorization of NMF can improve the OER activity because synthesized metal phosphides with high electrical conductivity can solve the poor conductivity problem of metal oxyhydroxides. After phosphorization, as‐synthesized NMFP (denoted “before OER”) shows a Ni 2p 3/2 peak near 853 eV and a Fe 2p 3/2 peak near 707 eV in Figure a, which correspond to the binding energies of Ni‐P and Fe‐P, respectively. Thus, it can be seen that the surface of as‐synthesized NMFP is mainly composed of Ni‐ and Fe‐phosphides.…”

Section: Resultsmentioning

confidence: 99%

NiMoFe and NiMoFeP as Complementary Electrocatalysts for Efficient Overall Water Splitting and Their Application in PV‐Electrolysis with STH 12.3%

Baek

Kim

Park

et al. 2019

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Complementary water splitting electrocatalysts used simultaneously in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) can simplify water splitting systems. Herein, earth‐abundant NiMoFe (NMF) and phosphorized NiMoFeP (NMFP) are synthesized as complementary overall water splitting (OWS) catalysts. First, NMF is tested as both the HER and OER promoter, which exhibits low overpotentials of 68 (HER) and 337 mV (OER). A quaternary NMFP is then prepared by simple phosphorization of NMF, which shows a much lower OER overpotential of 286 mV. The enhanced OER activity is attributed to the unique surface/core structure of NMFP. The surface phosphate acts as a proton transport mediator and expedites the rate‐determining step. With the application of OER potential, the NMFP surface is composed of Ni(OH)2 and FeOOH, active sites for OER, but the inner core consists of Ni, Mo, and Fe metals, serving as a conductive electron pathway. OWS with NMF‐NMFP requires an applied voltage of 1.452 V to generate 10 mA cm−2, which is one of the lowest values among OWS results with transition‐metal‐based electrocatalysts. Furthermore, the catalysts are combined with tandem perovskite solar cells for photovoltaic (PV)‐electrolysis, producing a high solar‐to‐hydrogen (STH) conversion efficiency of 12.3%.

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Hydrogen evolution reaction activity of nickel phosphide is highly sensitive to electrolyte pH

Abstract: Nickel phosphide has a much higher catalytic activity for the hydrogen evolution reaction in strongly acidic and basic electrolytes.

Cited by 105 publications

References 59 publications

Synergistic Nanotubular Copper‐Doped Nickel Catalysts for Hydrogen Evolution Reactions

Synergistic Nanotubular Copper‐Doped Nickel Catalysts for Hydrogen Evolution Reactions

Facile Synthesis of Well-Dispersed Ni2P on N-Doped Nanomesh Carbon Matrix as a High-Efficiency Electrocatalyst for Alkaline Hydrogen Evolution Reaction

NiMoFe and NiMoFeP as Complementary Electrocatalysts for Efficient Overall Water Splitting and Their Application in PV‐Electrolysis with STH 12.3%

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