Surface engineering induced hierarchical porous Ni12P5-Ni2P polymorphs catalyst for efficient wide pH hydrogen production

Zhang, Jingtao; Zhang, Zhen; Ji, Yongfei; Yang, Jindong; Fan, Ke; Ma, Xiaoxue; Wang, Chao; Shu, Riyang; Chen, Ying

doi:10.1016/j.apcatb.2020.119609

Cited by 143 publications

(50 citation statements)

References 55 publications

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“…Furthermore, surface phosphates can also act as a diffusion barrier which prevented the dissolution of inner active nickel phosphide, thus ensuring the HER durability of Ni 2 P-Ni 12 P 5 @Ni 3 S 2 / NF. [19,21,23,55,56] Remarkably, the Faradaic efficiency (FE) was also close to 100% in neutral media (Figure S20, Supporting Information).…”

Section: Resultsmentioning

confidence: 78%

“…[54] The partial emerging of surface phosphates during HER can also be observed in previous works. [55,56] The phosphate may accommodate more electrons and increase the local charge density, which might be conducive to the trapping and transfer of protons during the HER process. Furthermore, surface phosphates can also act as a diffusion barrier which prevented the dissolution of inner active nickel phosphide, thus ensuring the HER durability of Ni 2 P-Ni 12 P 5 @Ni 3 S 2 / NF.…”

Section: Resultsmentioning

confidence: 99%

“…The emerged phosphates in cycled sample were believed to further preserve the HER performance. [19,21,23,39,[54][55][56] Figure S27, Supporting Information displayed the FE of Ni 2 P-Ni 12 P 5 @Ni 3 S 2 /NF with the value of nearly 100% in alkaline media.…”

Section: Resultsmentioning

confidence: 99%

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Sequential Phase Conversion‐Induced Phosphides Heteronanorod Arrays for Superior Hydrogen Evolution Performance to Pt in Wide pH Media

et al. 2022

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Developing an efficient and non‐precious pH‐universal hydrogen evolution reaction electrocatalyst is highly desirable for hydrogen production by electrochemical water splitting but remains a significant challenge. Herein, a hierarchical structure composed of heterostructured Ni2P‐Ni12P5 nanorod arrays rooted on Ni3S2 film (Ni2P‐Ni12P5@Ni3S2) via a simultaneous corrosion and sulfidation is built followed by a phosphidation treatment toward the metallic nickel foam. The combination of theoretical calculations with in/ex situ characterizations unveils that such a unique sequential phase conversion strategy ensures the strong interfacial coupling between Ni2P and Ni12P5 as well as the robust stabilization of 1D heteronanorod arrays by Ni3S2 film, resulting in the promoted water adsorption/dissociation energy, the optimized hydrogen adsorption energy, and the enhanced electron/proton transfer ability accompanied with an excellent stability. Consequently, Ni2P‐Ni12P5@Ni3S2/NF requires only 32, 46, and 34 mV overpotentials to drive 10 mA cm−2 in 1.0 m KOH, 0.5 m H2SO4, and 1.0 m phosphate‐buffered saline electrolytes, respectively, exceeding almost all the previously reported non‐noble metal‐based electrocatalysts. This work may pave a new avenue for the rational design of non‐precious electrocatalysts toward pH‐universal hydrogen evolution catalysis.

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Section: Resultsmentioning

confidence: 78%

Section: Resultsmentioning

confidence: 99%

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Sequential Phase Conversion‐Induced Phosphides Heteronanorod Arrays for Superior Hydrogen Evolution Performance to Pt in Wide pH Media

et al. 2022

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“…[134] Notably, under a hydro/solvothermal environment, apart from serving as substrates, the self-supported substance (especially for some metal foams and foils) can also function as the source of metal elements in the resulting active catalysts. [1,15,[107][108][109]135] As is reported in the paper of Zou et al, the 2D Ni 3 S 2 nanosheets on the surface of NF (Ni 3 S 2 /NF) was prepared by directly etching the bare NF with thiourea solution using solvothermal synthesis. This in situ formation also promoted the exposure of high-index faceted {2̅ 10}, synergistically accounting for the [134] Copyright 2017, Wiley-VCH.…”

Section: Fabrication Methods Of Self-supported Electrocatalystsmentioning

confidence: 98%

“…[11][12][13] Within them, electrocatalytic water splitting has become the worldwide research focus recently as this technology can produce environmental-friendly highpure H 2 energy from electricity, as well as can be combined with other intermittent energy, such as wind and solar energy, elevating the utilization efficiency of the overall sustainable energy system. [14,15] The fundamental half-reactions which take place on a water electrolyzer involve hydrogen evolution reaction (HER) at the cathode and oxygen evolution reaction (OER) at the anode. [16] Presently, the commercial devices for water electrolysis include acidic proton-exchange membranes (PEMs) electrolyzer and alkaline water electrolyzers (AWEs).…”

mentioning

confidence: 99%

Self‐Supported Electrocatalysts for Practical Water Electrolysis

Yang

Drieß

Menezes

2021

Advanced Energy Materials

241

146

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Over the years, significant advances have been made to boost the efficiency of water splitting by carefully designing economic electrocatalysts with augmented conductivity, more accessible active sites, and high intrinsic activity in laboratory test conditions. However, it remains a challenge to develop earth‐abundant catalysts that can satisfy the demands of practical water electrolysis, that is, outstanding all‐pH electrolyte capacity, direct seawater splitting ability, exceptional performance for overall water splitting, superior large‐current‐density activity, and robust long‐term durability. In this context, considering the features of increased active species loading, rapid charge, and mass transfer, a strong affinity between catalytic components and substrates, easily‐controlled wettability, as well as, enhanced bifunctional performance, the self‐supported electrocatalysts are presently projected to be the most suitable contenders for practical massive scale hydrogen generation. In this review, a comprehensive introduction to the design and fabrication of self‐supported electrocatalysts with an emphasis on the design of deposited nanostructured catalysts, the selection of self‐supported substrates, and various fabrication methods are provided. Thereafter, the recent development of promising self‐supported electrocatalysts for practical applications is reviewed from the aforementioned aspects. Finally, a brief conclusion is delivered and the challenges and perspectives relating to promotion of self‐supported electrocatalysts for sustainable large‐scale production of hydrogen are discussed.

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Strategies for Tuning Tensile Strain and Localized Electrons in a Mo‐Doped NiCoCu Alloy for Enhancing Ampere‐Level Current Density HER Performance

Qian,

Wang,

et al. 2024

Adv Funct Materials

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Developing high‐activity non‐noble metal catalysts for improving the ability of water dissociation and H* adsorption/desorption in the hydrogen evolution reaction (HER) process in alkaline and neutral electrolytes is essential but remains challenging. Herein, a Mo‐doped NiCoCu alloy with tuned tensile strain and localized electrons is designed and synthesized by combining the solvothermal and annealing methods for achieving ampere‐level HER performance. Theoretical calculation results prove that Mo doping induces lattice tensile strain and localized electrons (electrons from Mo to the Ni/Co/Cu atoms), promoting the adsorption of O* and H* from H2O molecules on the Mo and Co sites and accelerating water dissociation. Therefore, NiCoCu‐Mo0.078/CF (CF = copper foam) shows low water dissociation energy, providing sufficient H* during the HER process. Meanwhile, its H* Gibbs free energy value is near zero, implying a rapid H* adsorption/desorption process. Electrochemical results show that NiCoCu‐Mo0.078/CF achieves better HER intrinsic activity in both a 1.0 m KOH (η−10 /η−1000 = 35/212 mV) and a 1.0 m phosphate buffer solution (η−10 /η−1000 = 24/256 mV) compared to NiCoCu‐Mo0/CF and NiCoCu‐Mo0.163/CF, and it can continuously operate for 100 h at −1000 mA cm−2. This work shows a sustainable way to design high‐performance catalysts for water electrolysis and proposes a well‐performing HER catalyst.

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Surface engineering induced hierarchical porous Ni12P5-Ni2P polymorphs catalyst for efficient wide pH hydrogen production

Cited by 143 publications

References 55 publications

Sequential Phase Conversion‐Induced Phosphides Heteronanorod Arrays for Superior Hydrogen Evolution Performance to Pt in Wide pH Media

Sequential Phase Conversion‐Induced Phosphides Heteronanorod Arrays for Superior Hydrogen Evolution Performance to Pt in Wide pH Media

Self‐Supported Electrocatalysts for Practical Water Electrolysis

Strategies for Tuning Tensile Strain and Localized Electrons in a Mo‐Doped NiCoCu Alloy for Enhancing Ampere‐Level Current Density HER Performance

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