Enhanced electrochemical oxygen evolution reaction activity on natural single-atom catalysts transition metal phthalocyanines: the substrate effect,Catalysis Science & Technology

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Enhanced electrochemical oxygen evolution reaction activity on natural single-atom catalysts transition metal phthalocyanines: the substrate effect
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2020-10-12 , DOI: 10.1039/d0cy01651a
Xuhao Wan _{1,

2,

3,

4} , Huan Niu _{1,

2,

3,

4} , Yiheng Yin _{1,

2,

3,

4} , Xiting Wang _{1,

2,

3,

4} , Chen Shao _{1,

2,

3,

4} , Zhaofu Zhang _{5,

6,

7,

8} , Yuzheng Guo _{1,

2,

3,

4}

Affiliation

The oxygen evolution reaction (OER) plays a crucial role in the field of renewable and clean energy such as electric vehicles and fuel cells. Research towards non-noble metals and highly efficient catalysts for the OER has garnered wide attention. Here, we report a series of macrocyclic transition metal phthalocyanines (TMPc) and transition metal phthalocyanine absorbed oxygen or sulfur atoms (TMOPc and TMSPc), natural photocatalytic and electrocatalytic OER single-atom catalysts (SACs). The results demonstrate that they are all semiconductors and extremely stable. Several Pc SACs such as FeOPc and PtPc show excellent high catalytic activity compared with traditional noble metal catalysts and an OER descriptor of the Pc SACs is developed to establish a volcano plot. In particular, FeOPc features a low overpotential of only 0.48 V. Moreover, single-walled nanotubes (SWNTs) are employed as the substrate of TMPc to improve the stability of active sites and prevent aggregation. The result indicates that the TMPc single-atom catalysts deposited on SWNTs feature far superior OER catalytic performance. Further studies suggest that the enhancement originates from the change of interaction between the central TM atom and OER intermediates and the variation of charge transfer caused by the SWNT substrates. Our work opens a new avenue for finding OER catalysts with higher activity and lower cost.

中文翻译：

天然单原子催化剂过渡金属酞菁上增强的电化学氧释放反应活性：底物效应

氧气释放反应（OER）在可再生能源和清洁能源领域（如电动汽车和燃料电池）中发挥着至关重要的作用。对用于OER的非贵金属和高效催化剂的研究已引起广泛关注。在这里，我们报告了一系列大环过渡金属酞菁（TMPc）和过渡金属酞菁吸收的氧或硫原子（TMOPc和TMSPc），天然光催化和电催化OER单原子催化剂（SAC）。结果表明，它们都是半导体，并且非常稳定。与传统的贵金属催化剂相比，几种Pc SAC（例如FeOPc和PtPc）表现出极好的高催化活性，因此开发了Pc SAC的OER描述词以建立火山图。特别是，FeOPc具有仅为0.48 V的低过电势。此外，单壁纳米管（SWNT）被用作TMPc的底物，以提高活性位点的稳定性并防止聚集。结果表明，沉积在单壁碳纳米管上的TMPc单原子催化剂具有极好的OER催化性能。进一步的研究表明，这种增强源自中央TM原子与OER中间体之间相互作用的变化以及由SWNT底物引起的电荷转移的变化。我们的工作为寻找具有更高活性和更低成本的OER催化剂开辟了一条新途径。进一步的研究表明，这种增强源自中央TM原子与OER中间体之间相互作用的变化以及由SWNT底物引起的电荷转移的变化。我们的工作为寻找具有更高活性和更低成本的OER催化剂开辟了一条新途径。进一步的研究表明，这种增强源自中央TM原子与OER中间体之间相互作用的变化以及由SWNT底物引起的电荷转移的变化。我们的工作为寻找具有更高活性和更低成本的OER催化剂开辟了一条新途径。

更新日期：2020-11-03

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