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首页> 外文期刊>Catalysis science & technology >Enhanced electrochemical oxygen evolution reaction activity on natural single-atom catalysts transition metal phthalocyanines: the substrate effect
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Enhanced electrochemical oxygen evolution reaction activity on natural single-atom catalysts transition metal phthalocyanines: the substrate effect

机译：增强电化学氧发生反应单原子催化剂对自然的活动过渡金属酞菁:衬底效果

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摘要

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.
机译：氧进化反应(OER)扮演至关重要的作用在可再生能源和清洁能源电动汽车和燃料电池等。研究对非贵金属金属和高度OER得到广泛有效的催化剂的关注。大环的过渡金属酞菁(TMPc)和过渡金属酞菁吸收氧或硫原子(TMOPc和TMSPc),自然的光催化和单原子催化剂electrocatalytic OER(囊)。半导体和极其稳定。囊如FeOPc和PtPc展示优秀的高相比传统的催化活性贵金属催化剂和OER的描述符Pc囊开发建立一座火山情节。过电压的只有0.48 V。单壁纳米管(纳米)被录用的衬底TMPc改进的稳定性活跃的站点和防止聚合。表明TMPc单原子的催化剂比OER沉积在纳米特性催化性能。增强来源于改变中央TM原子之间的相互作用OER中间体和电荷的变化碳纳米管引起的基质转移。打开一个新途径寻找OER催化剂更高的活动和更低的成本。

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