Surface engineering by doping manganese into cobalt phosphide towards highly efficient bifunctional HER and OER electrocatalysis

Wang, Maosen; Fu, Wenying; Du, Lei; Wei, Yongsheng; Rao, Peng; Lü, Wei; Zhao, Xinsheng; Wang, Yun; Sun, Shuhui

doi:10.1016/j.apsusc.2020.146059

Cited by 144 publications

(69 citation statements)

References 46 publications

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“…For example, NC@FeP 4 ‐CoP/NF can obtain a 0.011 s –1 TOF value at lower overpotential of 276 mV (Figure S13 and Table S4, Supporting Information), than the 350 mV overpotential of NC@CoP/NF, indicating that NC@FeP 4 ‐CoP/NF has better intrinsic activity. [ 39 ]…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Core‐Shell N‐Doped Carbon@FeP₄‐CoP Arrays as Robust Bifunctional Electrocatalysts for Overall Water Splitting at High Current Density

Yan

Shoko

et al. 2021

Adv Materials Inter

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Exploring non‐precious metal‐based electrocatalysts at high current density and stability is an urgent issue for sustainable H2 production. Here, hierarchical core‐shell N‐doped carbon encapsulated array‐like FeP4 and CoP active components have been fabricated in situ on the surface of nickel foam (NC@FeP4‐CoP/NF) by etching sheet‐like ZIF‐67 arrays, Prussian analog formation, and phosphating in turns. The crystallinity, hierarchical heterostructure, and chemical state have been carefully discussed. Electrochemical studies demonstrate that the catalyst displays excellent electrocatalytic activity and durability in electrochemical oxygen evolution reaction (η20 = 218 mV) and hydrogen evolution reaction (η10 = 116 mV), better than most previously reported bifunctional catalysts. Moreover, the bifunctional catalyst only needs 1.72 and 1.80 V cell voltages at 500 and 1000 mA cm−2 respectively, together with a good catalytic stability at 500 mA cm−2 for 48 h, implying potential commercialization prospects. This excellent electrocatalytic performance is mainly attributed to the distinctive hierarchical structure as well as core‐shell NC encapsulated FeP4‐CoP active sites, which can enhance the charge transport rate, inhibit the exfoliation of the active materials, provide a larger active surface area, and facilitate electrolyte diffusion and gas release.

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Section: Resultsmentioning

confidence: 99%

Hierarchical Core‐Shell N‐Doped Carbon@FeP₄‐CoP Arrays as Robust Bifunctional Electrocatalysts for Overall Water Splitting at High Current Density

Yan

Shoko

et al. 2021

Adv Materials Inter

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“…Wang et al reported the one-step electrodeposition of Mn on CoP via direct one-step electrodeposition to prepare MnCoP nanosheets. [41] The MnCoP showed an overpotential of 65 mV for HER and 261 mV for OER in 1 m KOH solution with a current density of 10 mA cm -2 to give an excellent catalytic performance (Figure 20a,f). The MnCoP/CC had the highest C dl of 293 mF dec −1 for HER (Figure 20c) and 162.25 mF cm -2 for OER (Figure 20h).…”

Section: Activity and Stabilitymentioning

confidence: 99%

Electrocatalysts by Electrodeposition: Recent Advances, Synthesis Methods, and Applications in Energy Conversion

Kale

Borse

Mohamed

et al. 2021

Adv Funct Materials

109

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The conventional environment polluting energy sources and the continuous growing energy demand compelled researchers to find alternative energy sources. Therefore, in recent years, extensive research has been carried out in synthesizing catalysts for energy conversion applications. This review focuses on the application of various electrodeposition methods in the synthesis of energy-related electrocatalyst and briefly discusses different electrocatalyst characterization techniques. Further, the influence of various parameters on the electrocatalyst activity and stability is highlighted. Electrocatalyst application in clean energy conversion reactions, such as the hydrogen evolution reaction, oxygen evolution reaction, oxygen reduction reaction, carbon dioxide reduction reaction, nitrogen reduction reaction along with the metalair/CO 2 battery, are reviewed. Finally, the comparative experimental data are provided as a reference to synthesize the next-generation electrodeposited electrocatalyst in clean energy conversions and beyond.

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“…The consequence shows that the RuCoP/NF has superior mass transport property and mechanical robustness. 42 According to the abovementioned experimental results, the introduction of P modulates the electron distribution of Ru and Co, enhances intrinsic conductivity to optimize the electrochemical adsorption step, and accelerates the water dissociation. After the incorporation of P, Ru species tending to Ru δ− serve as the boosted active sites under catalytic conditions for HER, which lead to the charge redistribution at the atomic interface of the catalyst, meanwhile improving the H adsorption behavior and further promoting the HER kinetics.…”

Section: Resultsmentioning

confidence: 99%

Phosphorus-Doped 3D RuCo Nanowire Arrays on Nickel Foam with Enhanced Electrocatalytic Activity for Overall Water Splitting

et al. 2021

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It is especially significant to design and construct high-performance and stable three-dimensional (3D) bifunctional nanoarchitecture electrocatalysts toward overall water splitting. Herein, we have constructed 3D self-supported phosphorus-doped ruthenium-cobalt nanowires on nickel foams (RuCoP/NF) via a simple hydrothermal reaction followed by a low-temperature phosphating reaction. Doping P can not merely enhance the intrinsic activity of electrocatalysts for overall water splitting but at the same time increase electrochemical surface areas (ECSAs) to expose more accessible active sites. As a 3D bifunctional catalyst, RuCoP/NF demonstrates superior performance for HER (44 mV@10 mA cm –2 ) and OER (379 mV@50 mA cm –2 ) in 1.0 M KOH electrolyte solution. The overall water-splitting system was assembled using RuCoP/NF as both anode and cathode. Besides, it exhibits a voltage of 1.533 V at a current density of 10 mA cm –2 and long-term durability within 24 h. P-dopant changes the electron structure of Ru and Co, which is conducive to the formation of Ru δ− and Co δ+ , resulting in the adjustment of binding H*/OH* and the improvement of the overall water-splitting reaction kinetics. This work provides a facile method to produce heteroatom-doped and high-performance catalysts for efficient overall water splitting.

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Surface engineering by doping manganese into cobalt phosphide towards highly efficient bifunctional HER and OER electrocatalysis

Cited by 144 publications

References 46 publications

Hierarchical Core‐Shell N‐Doped Carbon@FeP₄‐CoP Arrays as Robust Bifunctional Electrocatalysts for Overall Water Splitting at High Current Density

Hierarchical Core‐Shell N‐Doped Carbon@FeP₄‐CoP Arrays as Robust Bifunctional Electrocatalysts for Overall Water Splitting at High Current Density

Electrocatalysts by Electrodeposition: Recent Advances, Synthesis Methods, and Applications in Energy Conversion

Phosphorus-Doped 3D RuCo Nanowire Arrays on Nickel Foam with Enhanced Electrocatalytic Activity for Overall Water Splitting

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Surface engineering by doping manganese into cobalt phosphide towards highly efficient bifunctional HER and OER electrocatalysis

Cited by 144 publications

References 46 publications

Hierarchical Core‐Shell N‐Doped Carbon@FeP4‐CoP Arrays as Robust Bifunctional Electrocatalysts for Overall Water Splitting at High Current Density

Hierarchical Core‐Shell N‐Doped Carbon@FeP4‐CoP Arrays as Robust Bifunctional Electrocatalysts for Overall Water Splitting at High Current Density

Electrocatalysts by Electrodeposition: Recent Advances, Synthesis Methods, and Applications in Energy Conversion

Phosphorus-Doped 3D RuCo Nanowire Arrays on Nickel Foam with Enhanced Electrocatalytic Activity for Overall Water Splitting

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Product

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Hierarchical Core‐Shell N‐Doped Carbon@FeP₄‐CoP Arrays as Robust Bifunctional Electrocatalysts for Overall Water Splitting at High Current Density

Hierarchical Core‐Shell N‐Doped Carbon@FeP₄‐CoP Arrays as Robust Bifunctional Electrocatalysts for Overall Water Splitting at High Current Density