通过Cl-吸附在位上诱导的晶格氧气机制,用于有效的海水氧化反应
Qihao Sha1, Tianshu Gao2, Li Yan1
1State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
Journal of the American Chemical Society
|June 4, 2025
概括
这项研究引入了化物调解策略,以加强海水电解为燃料. 新的催化剂改变了氧气演变反应机制,提高了清洁能源生产的效率和稳定性.
科学领域:
- 电化学
- 材料科学
- 催化剂
背景情况:
- 海水的有效氧化对于燃料的生产至关重要.
- 氧化演化反应 (OER) 催化剂在海水电解中面临氧化和能量消耗的挑战.
- 将OER机制转换为格子氧机制 (LOM) 可以提高效率并减少副作用.
研究的目的:
- 开发一种化物 (Cl−) 中介策略,将OER机制从吸附物演变机制 (AEM) 转移到矿点上的LOM.
- 创建高效和稳定的OER催化剂用于海水电解.
- 研究 (Ir) 和相互作用在激活晶格氧的作用.
主要方法:
- 将高度分散的Ir加载到基于Ni的前体 (NiSe,Ni(OH) 2,NiS2,NiSOH).
- 建立一个Cl-Ir-O-Ni电子吸收链来加强Ni-O共价性.
- 研究海水电解中的催化性能,与性条件进行比较.
主要成果:
- 经Cl修改的Ir/NiOOH-Se@Cl催化剂实现了0.5A cm-2的OER电流密度,超电位为313mV.
- 这意味着与性条件相比,超电位减少了147mV (Ir/NiOOH-Se@OH).
- 催化剂在0.5 A cm-2下经过500小时的稳定运行.
结论:
- 中介策略有效地将OER机制转移到矿场的LOM.
- 这种方法提高了海水电解的催化活性和稳定性.
- 这些发现为设计用于清洁能源的高效氧气电催化剂提供了新的概念.
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