利用金属 - 合物协调转化为二核Ni (II) - 基板协调聚合物,以促进电化学氧的进化
Ruei-Hung Juang1, Han-Jung Li2, Yu-Chung Chang3
1Department of Applied Chemistry, National Yang Ming Chiao Tung University, Hsinchu, Taiwan.
一种基于的新型协调聚合物[Ni2(tmd) 2n,在性介质中作为氧化演化反应 (OER) 的电催化剂表现出色. 这种预催化剂转化为活性状态[Ni2(tmd) ]n-CV,显示出显著的效率和耐用性.
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:
- 氧进化反应 (OER) 在动力学上是缓慢的,这对整体的水分裂构成了挑战.
- 三维过渡金属氧化物,氧化物和复合物被探索为具有成本效益的OER电催化剂.
研究的目的:
- 合成和表征一种基于Ni的新型协调聚合物[Ni2(tmd) 2n,作为性OER的前催化剂.
- 调查OER期间基于Ni的协调聚合物的结构转换和催化活性.
主要方法:
- 一种基于Ni的新型协调聚合物的合成,[Ni2(tmd) 2n.
- 电化学表征包括循环电量计 (CV) 和超电位测量.
- 用X射线吸收和辐射光谱来研究结构变化.
主要成果:
- 在KOH中,合成的[Ni2[tmd]2]n转化为活性OER催化剂[Ni2[tmd]2]n-CV.
- [Ni2(tmd) 2]n-CV具有较低的超电位 (η10 = 222 mV, η50 = 385 mV) 和Tafel斜率 (94.15 mV/dec).
- 催化剂表现出极好的耐用性 (>100小时) 和低电荷转移电阻 (3.1 Ω).
结论:
- 基于Ni的协调聚合物[Ni2(tmd) 2n作为性OER的有效预催化剂.
- 结构转换为五坐标Ni状态对于催化活动至关重要.
- 催化剂的性能归因于氧物种吸附和潜在的Ni-OOH中间体.
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