Synthesis of oxygen-rich carbon materials as metal-free catalysts for oxygen reduction reaction in seawater electrolyte

IF 3.8 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jiangpeng Li , Qiuchen He , Su Zhan , Lin Zhou , Junjie Zhang , Yuchen Qiao , Ziming Zhao , Dehui Yang , Wenjun Jiang , Feng Zhou
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引用次数: 0

Abstract

Compared to conventional aqueous metal-air batteries, seawater batteries provide a promising strategy for the sustainable energy conversion and storage systems. However, the intricate ionic environment of seawater, in particular, Cl significantly restraint the oxygen reduction reaction (ORR) activity of the catalysts. Herein, mesoporous carbon materials with abundant oxygen-containing functional groups were simply fabricated as the cost-effective catalysts from the biowaste Ginkgo biloba, exhibiting prominent stability and ORR activity with a 4e path selectivity up to 92 % in seawater electrolyte. Structure characterization and ORR experimental results indicated the ORR performance was significantly modulated by the C-O-C in carbon matrix, and the synergistic of C-O-C and N-containing configuration may further enhance the dissociation of O-O of ∗OOH, resulting in an optimized 4e path selectivity. Additionally, the Ginkgo biloba derived catalysts displayed an overpotential of 580 mV for at 10 mA/cm2 more negative than that of the previously reported commercial Ir/C in seawater electrolyte. This study highlights the synthesis of sustainable and cost-effective catalysts for seawater batteries, offering a strategy for designing metal-free catalysts of seawater battery, and promoting the advancement of sustainable energy conversion and storage technologies.
合成富氧碳材料作为海水电解质中氧还原反应的无金属催化剂
与传统的含水金属-空气电池相比,海水电池为可持续能源转换和存储系统提供了一种前景广阔的策略。然而,海水错综复杂的离子环境,尤其是 Cl- 大大限制了催化剂的氧还原反应(ORR)活性。在此,我们利用生物废弃物银杏叶简单地制备了具有丰富含氧官能团的介孔碳材料,作为经济高效的催化剂,在海水电解质中表现出突出的稳定性和 ORR 活性,其 4e 路径选择性高达 92%。结构表征和 ORR 实验结果表明,碳基质中的 C-O-C 对 ORR 性能有显著的调节作用,C-O-C 和含 N 构型的协同作用可进一步增强 ∗OOH 的 O-O 解离,从而优化 4e 路径选择性。此外,银杏叶衍生催化剂在 10 mA/cm2 条件下的过电位为 580 mV,比之前报道的商用 Ir/C 在海水电解质中的过电位更负。这项研究强调了可持续且具有成本效益的海水电池催化剂的合成,为海水电池无金属催化剂的设计提供了一种策略,促进了可持续能源转换和存储技术的发展。
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来源期刊
Vacuum
Vacuum 工程技术-材料科学:综合
CiteScore
6.80
自引率
17.50%
发文量
0
审稿时长
34 days
期刊介绍: Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.
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