CoNi2S4@CoNi-LDH heterojunction grown on SSM as a highly efficient trifunctional catalyst for water-splitting and Zn–air batteries,Journal of Materials Chemistry C

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CoNi2S4@CoNi-LDH heterojunction grown on SSM as a highly efficient trifunctional catalyst for water-splitting and Zn–air batteries
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-11-06 , DOI: 10.1039/d3tc03336h
Zhuo Wang ₁ , Juan Jian ₁ , Xiuyan Wang ₁ , Yu Qiao ₁ , Meiting Wang ₁ , Shuang Gao ₁ , Ping Nie ₁ , Limin Chang ₁

Affiliation

The development of self-supported trifunctional catalysts for Zn–air batteries (ZABs) and efficient water splitting is of great significance. Herein, we have directly sulfurized cobalt nickel-layered double hydroxides (CoNi-LDH) grown in situ on stainless steel mesh (SSM) and successfully obtained CoNi₂S₄@CoNi-LDH/SSM, which needs only 252 mV to achieve a current density of 10 mA cm⁻² for the oxygen evolution reaction (OER), and a 0.74 V half-wave potential for the oxygen reduction reaction (ORR). Moreover, it shows enhanced hydrogen evolution reaction (HER) activity as compared to the precursor. Also, when serving as an air-cathode in the assembly of the liquid Zn–air battery (ZAB), it delivers a charge and discharge cycle of 320 hours and a voltage gap of 0.78 V at 5 mA cm⁻². All the electrocatalytic properties of CoNi₂S₄@CoNi-LDH/SSM are superior to the precursor, CoNi-LDH/SSM. Further vulcanization formed the heterojunction of CoNi₂S₄@CoNi-LDH and resulted in the obtained CoNi₂S₄@CoNi-LDH/SSM, which is an outstanding trifunctional catalyst. This study provides an experimental foundation and design inspiration for other self-supported trifunctional catalysts.

中文翻译：

在 SSM 上生长的 CoNi2S4@CoNi-LDH 异质结作为水分解和锌空气电池的高效三功能催化剂

开发用于锌空气电池（ZAB）和高效水分解的自支撑三功能催化剂具有重要意义。在此，我们直接硫化在不锈钢网（SSM）上原位生长的钴镍层状双氢氧化物（CoNi-LDH），并成功获得CoNi ₂ S ₄ @CoNi-LDH/SSM，仅需252 mV即可实现电流对于析氧反应(OER)，密度为10mA cm ^-2；对于氧还原反应(ORR)，半波电位为0.74V。此外，与前体相比，它表现出增强的析氢反应（HER）活性。^{此外，当用作液体锌空气电池（ZAB）组件中的空气阴极时，它可实现320小时的充电和放电循环以及5 mA cm -2}下0.78 V的电压间隙。_{CoNi 2} S ₄ @CoNi-LDH/SSM的所有电催化性能均优于前驱体CoNi-LDH/SSM。_{进一步硫化形成CoNi 2} S ₄ @CoNi-LDH异质结，得到CoNi ₂ S ₄ @CoNi-LDH/SSM，这是一种优秀的三功能催化剂。该研究为其他自支撑三功能催化剂提供了实验基础和设计灵感。

更新日期：2023-11-06

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