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在现场重构的异构结构在过渡金属硫化物上的活点异构连接用于加速水氧化

Li Huang¹, Rui Gao¹, Yunsheng Qiu¹

¹Center of Materials Science and Optoelectronics Engineering, College of Materials Science and Optoelectronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China.

Inorganic chemistry

|May 8, 2025

概括

过渡金属硫化物是水分裂的有希望的电催化剂. 这项研究设计了 (Ni,Fe) S2/MoS2异构结构,以精确控制 *in situ* 重构,实现高氧演化反应 (OER) 性能.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
催化剂是一种催化剂.

背景情况:

过渡金属硫化物 (TMSs) 显示出作为水分裂的无贵金属电催化剂的潜力.
在氧化演化反应 (OER) 过程中控制TMS的*in situ*结构重构以形成活性位点仍然是一个挑战.

研究的目的:

精确控制过渡金属硫化物的*in situ*重构,以提高OER活动.
设计和合成 (Ni,Fe) S2/MoS2异构结构,以实现高效的电化学水分解.

主要方法:

(Ni,Fe) S2/MoS2催化剂的异质连接工程.
电化学表征以评估OER活动和稳定性.
在电氧化过程中*in situ*结构重构的分析.

主要成果:

(Ni,Fe) S2/MoS2异构结构经历受控的重构,形成Ni(OH) 2/NiOOH/FeOOH活性位点.
在100 mA cm−2.2时达到228 mV的低超电位的优异的OER活动.
在性水电解剂中,在10 mA cm−2处表现出1.44 V的低电压,性能优于无Mo的催化剂.

结论:

对电化学重建的精确控制对于设计高性能电催化剂至关重要.
异质连接工程提供了一种途径,可以创建定制的活跃站点,以实现高效的水分.
开发的 (Ni,Fe) S2/MoS2催化剂代表了电化学水分解的低成本和高效的替代方案.

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