有缺陷的氧化物与堆叠故障为质子交换膜绿色生成
Ming-Rong Qu1, Yi-Ran Cheng2, Heng-Li Duan3
1Department of Chemistry, Institute of Biomimetic Materials and Chemistry, New Cornerstone Science Laboratory, Anhui Engineering Laboratory of Biomimetic Materials, Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China.
Small (Weinheim an der Bergstrasse, Germany)
|May 8, 2024
概括
缺陷的氧化 (WO3) 材料通过引入氧气空隙和拉伸应变来激活演变反应 (HER) 催化. 这一突破使非贵金属催化剂能够在质子交换膜 (PEM) 电解器中生产绿色.
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:
- 材料中的缺陷可以显著改变它们的原子结构和性能.
- 半导体三氧化物 (WO3) 通常表现出惰性电催化行为.
- 激活WO3用于催化对于开发高效的能量转化技术至关重要.
研究的目的:
- 为了证明缺陷诱导的拉伸应变可以激活半导体WO3.
- 调查WO3中氧气空缺和堆叠故障的作用.
- 评估缺陷WO3作为非贵金属催化剂在质子交换膜 (PEM) 电解剂中的演化反应 (HER) 的潜力.
主要方法:
- 在Ar/H2大气中对WO3进行处理以诱导缺陷的结构性表征.
- 密度函数理论 (DFT) 计算以确定WOx表面上的*H吸附能量.
- 将有缺陷的氧化物集成到商业PEM电解器中进行性能测试.
主要成果:
- 在WO3中产生了氧气空缺和堆叠故障,调节了其电子结构.
- 缺陷的WO3从电催化无活性材料转化为高活性催化剂.
- DFT计算预测了最佳的氧空位组成和应变,以增强 HER 活动.
- 缺陷的氧化物在PEM电解器中表现出与基催化剂相当的性能.
结论:
- 缺陷工程,特别是通过氧气空缺和拉伸应变,有效地激活WO3用于HER催化.
- 有缺陷的氧化物显示出作为商业绿色生成的非贵金属催化剂的显著前景.
- 这项研究强调了有缺陷的金属氧化物在推进可持续能源技术方面的潜力.
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