诱导的间歇效应在有序的Ir-B化合物上驱动水氧化
Ding Chen1, Ruohan Yu1,2, Hongyu Zhao1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China.
研究人员开发了一种新方法,用于制造有序的金属间- (Ir-B) 化合物,用于增强氧化演化反应 (OER) 催化. 这种新型材料在水电解器中显示出更好的活性和稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 电化学 电化学 电化学
背景情况:
- 光原子的间隙填充显著改变了催化剂的电子结构和吸附特性.
- 与传统的兴奋剂或表面修饰相比,有序的金属间结构提供了更高的稳定性和活性.
- 在 (Ir) 等密集金属格子中实现有序的间隙填充是具有挑战性的.
研究的目的:
- 开发一种新的策略来制造有序的金属间Ir-B化合物.
- 为了研究 (B) 原子在电网中的间歇效应.
- 评估合成的IrB1.1对氧演化反应 (OER) 的催化性能和稳定性.
主要方法:
- 采用了高温融盐辅助合成策略.
- 证实了有序B填充的金属间Ir-B化合物 (IrB1.1) 的形成.
- 评估了OER的电化学性能,并与商业的IrO2.2进行了比较.
主要成果:
- 在IrB1.1中有序的间歇性B原子通过捐赠者-接受器架构创建了有利的吸附表面.
- 在OER的速度决定步骤中,IrB1.1催化剂表现出最佳的自由能量向上,增强了活动.
- 强大的Ir-B合抑制了Ir的脱金属和重建,确保了高的催化稳定性.
- 与商业的IrO2相比,IrB1.1表现出优越的OER性能,并在质子交换膜水电解器 (PEMWE) 中得到了验证.
结论:
- 融盐的策略成功地产生了IrB1.1与有序的间歇性B原子.
- 诱导的间歇效应显著提高了基于的催化剂中的OER活性和稳定性.
- 对于高效的水电解应用,IrB1.1 是一个有前途的催化剂.
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