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A Trifunctional Ni-P/Fe-P Collaborated Electrocatalyst Enables Self-Powered Energy Systems.

ABSTRACT: Recently, extensive research efforts have been devoted to drive electrocatalytic water-splitting for hydrogen generation by electricity or solar cells. However, electricity from power grid and the intermittent property of sunlight inevitably brings about environmental pollution and energy loss. Thus, a novelty energy system for simultaneous generating H₂ from solar energy and overcoming the intermittence of sunlight is highly desirable. Herein, a self-powered energy system with solar energy as the sole input energy is successfully assembled by integrated Zn-air batteries with stable output voltage, solar cells, and water splitting electrolyzer to efficient H₂ production. Specially, the Zn-air batteries are charged by the solar cell to store intermitted solar energy as electricity during light reaction. Under unassisted light reaction, the batteries could release electric energy to drive H₂ production. Therefore, the aim for simultaneous generating H₂ and eliminating the restrictions of intermittent sunlight are realized. The solar-to-hydrogen efficiency and solar-to-water splitting device efficiency of the self-powered energy system are up to 4.6% and 5.9%, respectively. This work provides the novel design systems for H₂ production and the usage of renewable energy.

SUBMITTER: Yang R

PROVIDER: S-EPMC9353458 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature

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A Trifunctional Ni-P/Fe-P Collaborated Electrocatalyst Enables Self-Powered Energy Systems.

Yang Rui R Zheng Xiaozhong X Qin Minkai M Lin Binbin B Shi Xiaoyun X Wang Yong Y

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20220522 22

Recently, extensive research efforts have been devoted to drive electrocatalytic water-splitting for hydrogen generation by electricity or solar cells. However, electricity from power grid and the intermittent property of sunlight inevitably brings about environmental pollution and energy loss. Thus, a novelty energy system for simultaneous generating H<sub>2</sub> from solar energy and overcoming the intermittence of sunlight is highly desirable. Herein, a self-powered energy system with solar ...[more]

PMID: 35604244

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Project description:Research on outdoor, mobile, and self-powered temperature-control devices has always been highly regarded. These devices can reduce energy consumption for cooling and heating, and they have broad market prospects. On this basis, a rotary disc-shaped triboelectric nanogenerator (TENG) with a maximum open-circuit voltage of 6913 V, a maximum short-circuit current of 85 μA, and a maximum transferred charge of 1.3 μC was prepared. We synthesized a ferroelectric ceramic composed of 0.15PbTiO3-0.85PbSc0.5Ta0.5O3 (0.15PT-0.85PST), which exhibited excellent electrothermal effects at room temperature. By quenching, the electrothermal effect ( Δ Tmax) and energy harvesting properties of the device were 1.574 K and 0.542 J/cm3, respectively. Then, for the first time, we proposed a self-powered temperature quantification control system with a rotary disc-shaped TENG. This device effectively harnessed wind and water energy, in addition to other types of energy. The system consisted of energy collecting cups, a rotating disc-shaped FEP-rabbit fur TENG, a circuit management module, and a ferroelectric ceramic chip array. Through the circuit management module, the system converted external wind energy into a high-voltage electric field at the two ends of the 0.15PT-0.85PST ceramic chip to fully stimulate the electrothermal effect. At a speed of 200 rpm, the temperature change in the insulated cup within 276 s was 0.49 K, and the volume of the insulated cup was 300 times greater than that of the 0.15PT-0.85PST ceramic chip. Compared with the results reported in previous work, the cooling and heating times were both reduced by 31%, and the temperature changes for both cooling and heating increased by 81%. Moreover, the heating and cooling temperatures of the device optimized on this basis were increased to 1.19 K and 0.93 K, respectively. The great improvement in the temperature variation performance confirmed the great potential of the device for commercialization. This research could serve as a reference for reducing energy consumption for cooling and heating, and it meets the international energy policies of carbon dioxide emission peaking and carbon neutrality.

Dataset Information

A Trifunctional Ni-P/Fe-P Collaborated Electrocatalyst Enables Self-Powered Energy Systems.

Publications

A Trifunctional Ni-P/Fe-P Collaborated Electrocatalyst Enables Self-Powered Energy Systems.

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