Stacking faults triggered strain engineering of ZIF-67 derived Ni-Co bimetal phosphide for enhanced overall water splitting

Liu, Haimin; Jin, Mengmeng; Zhan, Da; Wang, Jinming; Cai, Xiaoyi; Qiu, Yongting; Lai, Linfei

doi:10.1016/j.apcatb.2020.118951

Cited by 92 publications

(38 citation statements)

References 55 publications

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“…Co 2 P/Ni 2 P‐Mo is prepared through slow dissolution of Ni substrate by Mo 6+ etching and subsequent deposition of Ni 2+ during the growth of Co(OH)F, and lots of stacking faults and defects are created after phosphorization. [ 252 ] Such stacking faults lead to the generation of tensile strain. The tensile strain causes lattice expansion and a decreased overlapping of d ‐orbital of metal atoms, which in turn decreases the bandwidth and upshifts the d ‐band center energy, making less antibonding states higher than E F and strengthening the binding energies of adsorbates.…”

Section: Transition Metal‐based Oer Electrocatalystsmentioning

confidence: 99%

Advanced Transition Metal‐Based OER Electrocatalysts: Current Status, Opportunities, and Challenges

Zhang

Zou

2021

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492

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and sustainable energy sources, which have been considered as an encouraging solution to significantly reduce the dependency on traditional fossil fuels. Hydrogen is a promising clean energy carrier by virtue of zero-carbon content and the highest gravimetric energy density. [1] In this scenario, hydrogen production through electricity-driven water splitting represents a promising strategy for renewable energy conversion.Water electrolysis involves hydrogen evolution reaction (HER) on cathode and oxygen evolution reaction (OER) on anode. Theoretically, it requires a potential difference of 1.23 V between anode and cathode for driving the overall reaction. [2] But actually, a much higher voltage is needed in a practical water electrolyzer due to the overpotentials on both electrodes. HER is a relatively simple two-electron transport process involving electrochemical H + adsorption and desorption of H 2 . In contrast, OER is an inherently more complex process and has sluggish oxygen evolution kinetics, since it needs to transfer four electrons through multi-step reactions with single-electron transfer at each step. [3] As a result, the accumulation of energy at each step makes OER kinetically hindered and a large overpotential is needed to overcome the kinetic energy barrier. On the other hand, OER is an important half reaction involved in rechargeable metal-air batteries which are also regarded as the emerging sustainable energy conversion technology. Nevertheless, the bottlenecks such as low lifetimes, inferior energy conversion efficiency, and limited stability of metal-air batteries mainly originate from the intrinsically sluggish kinetics of OER. [4] Hence, developing effective and stable OER electrocatalysts by improving oxygen electrokinetics can significantly contribute to improving energy-conversion efficiency.To date, transition metal-based OER catalysts have been extensively studied by virtue of their excellent OER catalytic activities. [5] Noble-metal-based electrocatalysts have been considered as the most powerful electrocatalysts for OER in spite of their high prices. Among them, Ru and Ir have been verified to outperform Pt, Pd, and Rh. [6] Considering the high potential applied during OER, noble-metal oxides such as IrO 2 and RuO 2 are widely chosen as the state-of-the-art electrocatalysts. Nevertheless, RuO 2 is highly unstable in both acidic and alkaline electrolytes under high anodic potential. [7] Although IrO 2 Oxygen evolution reaction (OER) is an important half-reaction involved in many electrochemical applications, such as water splitting and rechargeable metal-air batteries. However, the sluggish kinetics of its four-electron transfer process becomes a bottleneck to the performance enhancement. Thus, rational design of electrocatalysts for OER based on thorough understanding of mechanisms and structure-activity relationship is of vital significance. This review begins with the introduction of OER mechanisms which include conventional adsorbate evolution mechanism and lattice-oxygen-mediated...

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Section: Transition Metal‐based Oer Electrocatalystsmentioning

confidence: 99%

Advanced Transition Metal‐Based OER Electrocatalysts: Current Status, Opportunities, and Challenges

Zhang

Zou

2021

Small

492

273

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“…[15] Moreover, current studies have been reported that the heterostructure formed under the combina-tion of two or more types materials in TMPs is conducive to greatly enhance their catalytic performance via creating additional active sites, modulating the electron distribution, improving the electrical conductivity and durability of the catalyst. [22][23][24][25] In this context, the rational design and preparation of heterogeneous TMPs-based bifunctional catalysts with a high catalytic performance are of great significance. [26,27] Here, we report the heterogeneous trimetallic phosphides Ni 2 PÀ Fe 2 PÀ Co 2 PÀ Ni 5 P 4 nanorods on Ni foam (NiFeCoP/NF) as self-supported electrodes for water electrolysis.…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous NiFeCoP/NF Nanorods as a Bifunctional Electrocatalyst for Efficient Water Electrolysis

Cen

Zeng

et al. 2021

ChemCatChem

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The exploitation of transition metal phosphates (TMPs)-based catalysts with excellent activity and stability toward both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) for water electrolysis is imperative but challenging. Herein, we report a novel heterostructured Ni 2 PÀ Fe 2 PÀ Co 2 PÀ Ni 5 P 4 nanorods derived from a NiFe LDH@ZIF-67 precatalyst on 3D self-supported Ni foam (NiFeCoP/NF) for water electrolysis. Owing to systematically engineering the composition, structure, and morphology of catalyst, which not only increase the intrinsic activity and create more accessible catalytic activity centers, but also accelerate electron transfer and promote the gas release, the designed NiFeCoP/NF achieves synergistically enhanced catalytic performance towards OER and HER. The as-prepared NiFeCoP/NF electrode exhibits excellent activities with low overpotentials of 244.2 mV for OER and 167.5 mV for HER, respectively to reach a current density of 100 mA cm À 2 in 1.0 KOH solution, as well as outstanding stability for 140 h at 500 mA cm À 2 . Additionally, a water electrolysis device constructed with the NiFeCoP/NF electrode as both the anode and cathode only needs a low cell voltage of 1.564 V to achieve 30 mA cm À 2 . This work presents a viable way for developing the high catalytic performance of TMPs-based bifunctional electrocatalysts via designing and regulating the electronic structure and morphology.

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“…With the rapid development of economy, energy and environmental problems have raised increasing concerns in recent years (Su et al, 2019 ; Lin et al, 2020 ; Liu H. et al, 2020 ; Liu S. et al, 2020b ). To reduce the fossil fuels reliance and lower greenhouse gas emission, there is an urgent need to develop clean and sustainable energy resources.…”

Section: Introductionmentioning

confidence: 99%

“…It is worth noting that the concentration and intrinsic activity of active sites can be simultaneously improved by increasing the specific surface area of catalyst (Eiler et al, 2020 ). In addition, regulating the electronic structure of catalysts could also increase the intrinsic activity, such as heteroatom doping (Liu et al, 2015 ; Nan et al, 2019 ; Liu H. et al, 2020 ), defect engineering (Yilmaz et al, 2018 ), alloying (Yang et al, 2015 ). Co is plentiful and low cost compared with noble metals.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the high specific surface can provide a huge number of active sites and the open pore structure in the catalytic process, which is very important to increase the catalytic activity. Therefore, a large number of MOFs have been exploited and classified according to their structural characteristics in recent years, such as zeolitic imidazolate frameworks (ZIFs) (Liu H. et al, 2020 ), boron imidazolate frameworks (BIFs) (Liu et al, 2018 ), materials of institute lavoisier (MIL) (Chen J. et al, 2019 ; Chen W. et al, 2019 ) and so on. Through the pyrolysis process, these materials can convert into various metals, metal sulfides/phosphides/carbides, carbon-based materials, and other metal structures.…”

Section: Introductionmentioning

confidence: 99%

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Cobalt-Based Metal-Organic Frameworks and Their Derivatives for Hydrogen Evolution Reaction

Han

et al. 2020

Front. Chem.

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Hydrogen has been considered as a promising alternative energy to replace fossil fuels. Electrochemical water splitting, as a green and renewable method for hydrogen production, has been drawing more and more attention. In order to improve hydrogen production efficiency and lower energy consumption, efficient catalysts are required to drive the hydrogen evolution reaction (HER). Cobalt (Co)-based metal-organic frameworks (MOFs) are porous materials with tunable structure, adjustable pores and large specific surface areas, which has attracted great attention in the field of electrocatalysis. In this review, we focus on the recent progress of Co-based metal-organic frameworks and their derivatives, including their compositions, morphologies, architectures and electrochemical performances. The challenges and development prospects related to Co-based metal-organic frameworks as HER electrocatalysts are also discussed, which might provide some insight in electrochemical water splitting for future development.

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Stacking faults triggered strain engineering of ZIF-67 derived Ni-Co bimetal phosphide for enhanced overall water splitting

Cited by 92 publications

References 55 publications

Advanced Transition Metal‐Based OER Electrocatalysts: Current Status, Opportunities, and Challenges

Advanced Transition Metal‐Based OER Electrocatalysts: Current Status, Opportunities, and Challenges

Heterogeneous NiFeCoP/NF Nanorods as a Bifunctional Electrocatalyst for Efficient Water Electrolysis

Cobalt-Based Metal-Organic Frameworks and Their Derivatives for Hydrogen Evolution Reaction

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