Interface Engineering of Hollow CoO/Co4S3@CoO/Co4S3 Heterojunction for Highly Stable and Efficient Electrocatalytic Overall Water Splitting

Li, Huan; Wu, Xueqiu; Wang, Ping; Song, Shaojia; He, Miao; Li, Chenyu; Wang, Weiwei; Zhao, Fang; Yuan, Xilin; Song, Weiyu; Liu, Zhenxing

doi:10.1021/acssuschemeng.2c03609

Cited by 29 publications

(6 citation statements)

References 56 publications

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“…Meanwhile, based on the Nyquist plots, the double layer capacitance ( C dl ) between the electrode and membrane is also derived, which is related to the number of active sites. − The higher value of the C dl , the more active sites are achieved for the electrode. As shown in Table , a higher C dl value of 10.27 mF/cm 2 is observed for the Ir/Pt sintered Ti, and a lower one is presented for Ir/sintered Ti with a value of 8.250 mF/cm 2 .…”

Section: Resultsmentioning

confidence: 99%

Efficient Integrated Electrode Enables High-Current Operation and Excellent Stability for Green Hydrogen Production

Ding

Wang

Xie

et al. 2023

ACS Sustainable Chem. Eng.

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Generating green hydrogen through proton exchange membrane electrolyzer cells (PEMECs) is promising to build future sustainable energy systems. Operating PEMECs at high current densities with high efficiency is a realistic strategy to reduce the capital costs of PEMECs and increase their sustainability. Herein, an Ir-integrated electrode was developed via facile electrodeposition as an efficient anode for PEMECs, successfully achieving high-current operation of up to 6 A/cm 2 . More importantly, the electrode shows excellent stability under an ultrahigh current density of 5 A/cm 2 , showing almost no performance loss after the stability test. Further studies indicate that a platinum protection layer on Ti substrates plays a crucial role in superior performance and stability, which not only provides electrodes with improved electrical conductivity resulting in improved catalyst activity but also enhances the crack-free catalyst layer achieving catalysts' adhesion improvement to the substrate and prevents substrate oxidation. With platinum, the cell voltage can be improved by 33, 59, and 87 mV at current densities of 2, 4, and 6 A/cm 2 , respectively. Overall, considering efficient high-current operation capability, remarkable stability, and significantly simplified and low-cost fabrication process with easy scalability, the developed integrated electrodes are believed to have great potential in future sustainable energy systems.

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Section: Resultsmentioning

confidence: 99%

Efficient Integrated Electrode Enables High-Current Operation and Excellent Stability for Green Hydrogen Production

Ding

Wang

Xie

et al. 2023

ACS Sustainable Chem. Eng.

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“…2e) is ascribed to the (111) plane of CoO. 34,35 It is noteworthy that the 2D nanosheet structure of the as-prepared materials can provide a wealth of fast channels for mass transfer. In addition, the element mapping of the CoO/CC nanosheets further verified the uniform distribution of the elements Co and O throughout the whole CoO nanosheets (Fig.…”

Section: Resultsmentioning

confidence: 99%

Enhanced hydrogen evolution reaction via regulating the adsorbability between 2D CoO nanosheets and CC substrate

Wang,

Xiong,

Liu

et al. 2023

Phys. Chem. Chem. Phys.

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“…[38][39] The weak band at 939 cm 4b). [40] Two fitting peaks of 786.94 eV and 803.67 eV were satellite peaks (denoted as Sat.). [41] As comparison, MoÀ CoO-2 and MoÀ CoO-3 showed the peaks at 781.02 eV/797.26 eV and 780.71 eV/796.73 eV with satellite peaks pairs of 786.61 eV/803.44 eV and 785.89 eV/ 802.87 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

Highly sensitive detection of glucose at a novel non‐enzyme electrochemical sensing based on Mo‐doped CoO Nanosheets

Xia,

Pan,

Zhang

et al. 2023

Chemistry An Asian Journal

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In this work, a Mo doped CoO nanosheet grown on nickel foam (labeled as: Mo−CoO) with defect‐rich and improved electron transfer capacity was designed to be used as a novel non‐enzyme electrode material. Physical characterizations demonstrated the Mo elements were doped inside of the samples and they were mutually stabilized with each other, resulting in a high structural stability electrochemical catalytical activity even if the content of Mo was low. For non‐enzymatic glucose electrochemical sensing, the prepared Mo−CoO‐1 showed a remarkable sensitivity of 89.3 mA cm−2 mM−1, and a low detection limit of 0.43 μM. Density functional theory (DFT) studies revealed that the doped Mo atom exhibited a higher d‐band center compared to the Co atom. A stronger p‐d orbital hybridization between the glucose and the Mo atoms indicated the enhancement of glucose adsorption and activation. Importantly, Mo−CoO‐1 provided a good selectivity and long‐term stability, which can be expected to be used in future practical applications.

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Interface Engineering of Hollow CoO/Co₄S₃@CoO/Co₄S₃ Heterojunction for Highly Stable and Efficient Electrocatalytic Overall Water Splitting

Cited by 29 publications

References 56 publications

Efficient Integrated Electrode Enables High-Current Operation and Excellent Stability for Green Hydrogen Production

Efficient Integrated Electrode Enables High-Current Operation and Excellent Stability for Green Hydrogen Production

Enhanced hydrogen evolution reaction via regulating the adsorbability between 2D CoO nanosheets and CC substrate

Highly sensitive detection of glucose at a novel non‐enzyme electrochemical sensing based on Mo‐doped CoO Nanosheets

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