/离子兴奋剂诱导了CoMoO4的电子结构调制,以增强的进化.
Zhifeng Gao1, Tianjun Shen1, Zifeng Zeng1
1School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai, 201418, PR China.
Journal of colloid and interface science
|August 7, 2024
概括
开发了一种新的电催化剂Fe/B-CoMoO4,显著提高了进化反应 (HER) 的性能. 这种耐用且价格低廉的催化剂为清洁能源应用提供了的有希望的替代品.
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:
- 为演化反应 (HER) 开发高效的电催化剂对于应对能源和环境挑战至关重要.
- 过渡金属氧化物具有潜力,但需要结构和电子优化以实现高性能.
研究的目的:
- 调查阴离子/阴离子联合兴奋剂对CoMoO4.4的HER活性的影响.
- 为 HER.设计和制造一种高性能,廉价和耐用的电催化剂.
主要方法:
- 蚀刻和还原策略合成Fe和B联合合的CoMoO4 (Fe/B-CoMoO4).
- 电化学表征以评估 HER 的性能,包括电流密度,超电位和 Tafel 斜率.
- 经过100小时的耐用性测试.
- 理论计算以了解联合兴奋剂对电子结构的协同效应.
主要成果:
- Fe/B-CoMoO4在38mV的超电位下实现了10mA cm−2的电流密度,其Tafel斜率为51mV dec−1.1.
- 催化剂在100小时内表现出强大的耐用性,没有性能下降.
- 性能与碳 (Pt/C) 催化剂上的商业相提并论.
结论:
- 在CoMoO4中,Fe和B的阴离子/阴离子共显著增强了其内在的HER活性.
- 铁和B兴奋剂的协同效应优化了电子结构,H中间体的吸附能量和d频段中心位置.
- 这项工作为设计用于能源转换设备的高效电催化剂提供了指导原则.
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