通过NiS无形化合物中的阴离子和阴离子协同调节来增强整体水分离
1Key Laboratory of Optical Field Manipulation of Zhejiang Province, Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, P. R. China.
ACS applied materials & interfaces
|December 4, 2023
概括
开发了一种具有成本效益的铁和编硫化无形薄膜催化剂 (FeNiSP),可显著提高水素演化反应 (HER) 和氧化演化反应 (OER) 在水分裂中的电催化性能.
科学领域:
- 电触媒溶解是一种电触媒.
- 材料科学 材料科学 材料科学
- 能源转换 能源转换
背景情况:
- 开发高效的电催化剂用于水分离对于清洁能源至关重要.
- 同时的进化反应 (HER) 和氧进化反应 (OER) 催化剂的设计具有挑战性.
- 具有成本效益和高性能的双功能催化剂有很高的需求.
研究的目的:
- 合成和表征一种新的Fe和P编的NiS无形薄膜催化剂 (FeNiSP).
- 评估FeNiSP对HER和OER的双功能电催化活性.
- 调查有助于增强催化性能的潜在机制.
主要方法:
- 通过受控的离子和离子前体合成Fe-和P-编码的NiS无形薄膜.
- 电化学表征,包括对HER和OER的超电位测量.
- 使用FeNiSP作为阳极和阴极的水分性能评估.
- 密度函数理论 (DFT) 计算以阐明电子结构和吸附特性.
主要成果:
- 在FeNiSP中,活性位点显著增强,电荷转移阻力降低.
- 在100 mA·cm-2时,HER获得了135 mV和OER获得了330 mV的显著低的超电位.
- 在10mA·cm-2的低电池电压为1.56V被证明是整体的水分裂.
- DFT的计算揭示了调制的电子结构和优化的吸附能.
结论:
- 在NiS无形薄膜中的Fe和P-codoping有效地增强了用于水分裂的双功能电催化活性.
- 催化剂的设计优化了质子吸附/脱附和氧介质结合.
- FeNiSP 是一个有前途的候选者,可以实现高效,低成本的电催化水分解.
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