N, O-doped carbon foam as metal-free electrocatalyst for efficient hydrogen production from seawater

Liu, Qian; Sun, Shengjun; Zhang, Longcheng; Luo, Yongsong; Yang, Qin; Dong, Kai; Fang, Xiaodong; Zheng, Dongdong; Alshehri, Abdulmohsen Ali; Sun, Xuping

doi:10.1007/s12274-022-4869-2

Cited by 96 publications

(39 citation statements)

References 37 publications

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“…The electrochemically active surface area (ECSA) of Ni SAs@S/N-FCS is further investigated by calculating the electrochemical double-layer capacitance (C dl ). [36][37][38] As expected, the Ni SAs@S/N-FCS catalyst possesses more available active sites with a C dl value of 2.63 mF cm À 2 (Figure 4e; Figure S22, Supporting Information), which is about 8.5 times that of Ni NPs@S/N-FCS (0.31 mF cm À 2 ). Electrochemical impedance spectroscopy (EIS) analysis reveals that the Ni SAs@S/N-FCS catalyst shows a smaller charge transfer resistance than Ni NPs@S/N-FCS and Ni-free S/N-FCS, indicating a faster charge-transfer process for Ni SAs@S/N-FCS during OER (Figure S23, Supporting Information), in line with the Tafel slope results.…”

Section: Methodssupporting

confidence: 57%

Surface‐Exposed Single‐Ni Atoms with Potential‐Driven Dynamic Behaviors for Highly Efficient Electrocatalytic Oxygen Evolution

Zhao

Fan

et al. 2022

Angew Chem Int Ed

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Trapping the active sites on the exterior surface of hollow supports can reduce mass transfer resistance and enhance atomic utilization. Herein, we report a facile chemical vapor deposition strategy to synthesize single‐Ni atoms decorated hollow S/N‐doped football‐like carbon spheres (Ni SAs@S/N‐FCS). Specifically, the CdS@3‐aminophenol/formaldehyde is carbonized into S/N‐FCS. The gas‐migrated Ni species are anchored on the surface of S/N‐FCS simultaneously, yielding Ni SAs@S/N‐FCS. The obtained catalyst exhibits outstanding performance for alkaline oxygen evolution reaction (OER) with an overpotential of 249 mV at 10 mA cm−2, a small Tafel slope of 56.5 mV dec−1, and ultra‐long stability up to 166 hours without obvious fading. Moreover, the potential‐driven dynamic behaviors of Ni‐N4 sites and the contribution of the S dopant at different locations in the matrix to the OER activity are revealed by the operando X‐ray absorption spectroscopy and theoretical calculations, respectively.

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Section: Methodssupporting

confidence: 57%

Surface‐Exposed Single‐Ni Atoms with Potential‐Driven Dynamic Behaviors for Highly Efficient Electrocatalytic Oxygen Evolution

Zhao

Fan

et al. 2022

Angew Chem Int Ed

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“…Hydrogen (H2) with outstanding energy density and environmental benignity is an ideal energy carrier to decarbonize current energy systems [1,2]. Despite the escalating demand for high-purity H2, it has not yet been able to fully replace fossil fuels, and one of the obstacles that must be overcome is economical, efficient, and eco-friendly production.…”

Section: Introductionmentioning

confidence: 99%

Benzoate anions-intercalated NiFe-layered double hydroxide nanosheet array with enhanced stability for electrochemical seawater oxidation

Zhang¹,

Liang²,

Yue³

et al. 2022

Nano Research Energy

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215

143

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§ Longcheng Zhang and Jie Liang contributed equally to this work. Benzoate anions-intercalated NiFe-LDH nanosheet on carbon cloth (BZ-NiFe-LDH/CC) behaves as a highly efficient and durable electrocatalyst for alkaline seawater oxidation. In alkaline seawater, it attains the current density of 500 mA cm -2 at a low overpotential of 610 mV for 100-h uninterrupted electrolysis with no obvious structural change, reflecting significantly boosted activity and resistance toward chlorine species corrosion.

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“…Nevertheless, large-scale water electrolysis would doubtlessly exacerbate the shortage of freshwater. In contrast, the proportion of seawater is ~96.5% of the Earth’s water supply, making it have huge potential for large-scale H 2 generation [ 16 , 17 , 18 , 19 , 20 ]. For hydrogen evolution reaction (HER), Pt-based materials are the most efficient catalysts, but the rareness and high cost heavily obstruct their practical applications.…”

Section: Introductionmentioning

confidence: 99%

Amorphous Co-Mo-B Film: A High-Active Electrocatalyst for Hydrogen Generation in Alkaline Seawater

et al. 2022

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The development of efficient electrochemical seawater splitting catalysts for large-scale hydrogen production is of great importance. In this work, we report an amorphous Co-Mo-B film on Ni foam (Co-Mo-B/NF) via a facile one-step electrodeposition process. Such amorphous Co-Mo-B/NF possesses superior activity with a small overpotential of 199 mV at 100 mA cm−2 for a hydrogen evolution reaction in alkaline seawater. Notably, Co-Mo-B/NF also maintains excellent stability for at least 24 h under alkaline seawater electrolysis.

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N, O-doped carbon foam as metal-free electrocatalyst for efficient hydrogen production from seawater

Cited by 96 publications

References 37 publications

Surface‐Exposed Single‐Ni Atoms with Potential‐Driven Dynamic Behaviors for Highly Efficient Electrocatalytic Oxygen Evolution

Surface‐Exposed Single‐Ni Atoms with Potential‐Driven Dynamic Behaviors for Highly Efficient Electrocatalytic Oxygen Evolution

Benzoate anions-intercalated NiFe-layered double hydroxide nanosheet array with enhanced stability for electrochemical seawater oxidation

Amorphous Co-Mo-B Film: A High-Active Electrocatalyst for Hydrogen Generation in Alkaline Seawater

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