In-situ growth of VS4 nanorods on Ni-Fe sulfides nanoplate array towards achieving a highly efficient and bifunctional electrocatalyst for total water splitting

He, Yujia; Shen, Jun; Li, Qin; Zheng, Xiuzhang; Wang, Zixuan; Cui, Liang; Xu, Jiangtao; Liu, Jingquan

doi:10.1016/j.cej.2023.145461

Cited by 28 publications

(9 citation statements)

References 48 publications

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“…It can be seen that the catalysts in this work have excellent total water-splitting performance. for electrocatalysts in the recently reported literature [35,40,41,43,[45][46][47][48][49][50].…”

Section: Resultsmentioning

confidence: 99%

“…Figure 12.Comparison of the overall water-splitting performance at the current density of 10 mA cm −2 for electrocatalysts in the recently reported literature[35,40,41,43,[45][46][47][48][49][50].…”

mentioning

confidence: 96%

“…Figure 9. Comparison of (a) the Tafel slope and η 10 and (b) the Tafel slope and η 100 for the reported OER catalysts[31,35,40,41,43,[45][46][47][48][49].…”

mentioning

confidence: 99%

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Self-Supporting np-AlFeNiO Bifunctional Electrode Material for Electrochemical Water Splitting Prepared by Electrooxidation

Ma,

Xu,

Gao

et al. 2024

Energies

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Hydrogen production through water splitting is a promising path to develop renewable green energy. Effective, stable, and low-cost catalysts are the key to water splitting. In the present work, a series of self-supporting nanoporous alloys are prepared by using a dealloying process followed by electrooxidation. Among them, the np-AlFeNiO-4s sample exhibits remarkable activity (10 mA cm−2 at 32 mV for the HER and 278 mV for the OER) and good long-term stability (100 h) in alkaline conditions for both the HER and the OER. It only requires 1.56 V to reach 10 mA cm−2 current density for total water splitting performance. The very short time of electrooxidation can significantly improve the HER performance. Electrooxidation makes the metal and metal oxide sites on the electrode surface effectively coupled, which greatly enhances the kinetic rate of the Volmer and Heyrovsky steps. Appropriate electrooxidation is a rapid and easy way to improve the activity of the electrocatalyst, which has a broad application prospect in electrochemical water splitting.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 96%

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Self-Supporting np-AlFeNiO Bifunctional Electrode Material for Electrochemical Water Splitting Prepared by Electrooxidation

Ma,

Xu,

Gao

et al. 2024

Energies

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“…H 2 produced by water splitting has shown great potential in the clean energy field. , However, the oxygen evolution reaction (OER) is one of the main kinetic limitation steps. − At present, noble metal oxides including IrO 2 and RuO 2 are the most studied OER catalysts, , whose costs are high and their long-term stability in a base medium is poor. They could even be dissolved during the OER process. − Catalysts containing transition metals usually present a superior catalytic property, − like Mn-, , Co-, , and Ni-based , catalysts. However, their toxicity and high cost also restrain their corresponding application.…”

Section: Introductionmentioning

confidence: 99%

“…They could even be dissolved during the OER process. 10−12 Catalysts containing transition metals usually present a superior catalytic property, 13−15 like Mn-, 16,17 Co-, 18,19 and Ni-based 20,21 catalysts. However, their toxicity and high cost also restrain their corresponding application.…”

Section: Introductionmentioning

confidence: 99%

Elucidating the Mechanism of Oxygen Evolution Reaction on Nanostructured Copper-Based Catalysts

Xie,

Zhang,

Lai

et al. 2024

ACS Appl. Nano Mater.

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In water splitting processes, the oxygen evolution reaction (OER) is one of the main kinetic control steps that should be triggered by high-efficiency catalysts. A series of Cu-based catalysts are considered potential candidates. This work provides a simple and effective strategy for fabricating large-scale copper-based catalysts by anodization on a copper foil at room temperature in a KOH solution. The representative petal-shaped CuO and Cu(OH) 2 nanorods are obtained. The corresponding surface areas are 0.0197 and 1.966 m 2 /g, respectively. The surface wettability of Cu(OH) 2 is lower than that of CuO. The catalytic performance is studied by linear sweep voltammetry (LSV). The results show that the potential of the OER for CuO at 10 mA/cm 2 is 1.67 V, which reduces by 130 mV compared to Cu(OH) 2 . The CuO could keep 10 mA/cm 2 after a 1 h chronoamperometry test, which is about 3 times higher than that of Cu(OH) 2 . To verify the distinguishing catalytic difference between CuO and Cu(OH) 2 , in situ Raman spectra have been recorded. Inspiringly, the Cu III active specie at 603 cm −1 is captured during the OER process on CuO instead of Cu(OH) 2 . The related mechanism has been discussed in detail.

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Liquid Metal Aerogel With Janus Architecture for Selective Direction Recognition and High‐Efficiency Moisture Energy Harvesting

Cui,

Li,

Xia

2024

Adv Funct Materials

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Liquid metal (LM) micro‐nano droplets show the superiority in reducing the high surface tension applicable in conductive inks for flexible electronics. However, the dynamic surface makes LM droplets susceptible to be oxidized, facing challenges in storage and applications. Herein, a bifunctional groups cross‐linking strategy is adopted to encapsulate LM droplets into a robust shell. During sonicating LM in carboxymethyl chitosan (CMCS) solution with bifunctional groups (i.e., carboxyl and amino groups), a robust interface shell is constructed by anchoring effect, thereby providing high chemical stability (>7d). When directionally freezing‐drying LM dispersions, aerogel with Janus architecture is produced driven by the gravity of LM droplets. Due to the unique heterogeneous structure, the resultant aerogel exhibits a selective multifunctional response toward directional bending. In addition, owing to the gradient distribution of CMCS within aerogel, moisture electricity generator can be built with a high output voltage of 460 mV. Thus, this bifunctional groups cross‐linking strategy not only improves the chemical stability of LM micro‐nano droplets, but also renders a new method for producing multifunctional aerogel with energy harvesting and selective directional recognition, and applicable in smart sensors and power supplying devices.

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In-situ growth of VS4 nanorods on Ni-Fe sulfides nanoplate array towards achieving a highly efficient and bifunctional electrocatalyst for total water splitting

Cited by 28 publications

References 48 publications

Self-Supporting np-AlFeNiO Bifunctional Electrode Material for Electrochemical Water Splitting Prepared by Electrooxidation

Self-Supporting np-AlFeNiO Bifunctional Electrode Material for Electrochemical Water Splitting Prepared by Electrooxidation

Elucidating the Mechanism of Oxygen Evolution Reaction on Nanostructured Copper-Based Catalysts

Liquid Metal Aerogel With Janus Architecture for Selective Direction Recognition and High‐Efficiency Moisture Energy Harvesting

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