Electron deficiency modulates hydrogen adsorption strength of Ru single-atomic catalyst for efficient hydrogen evolution

Baoyue Cao, Hu Shi, Qiangqiang Sun, Yan Yu, Liangliang Chang, Shan Xu, Chunsheng Zhou, Hongxia Zhang, Jianghong Zhao, Yanyan Zhu and Pengju Yang

Renewable Energy, 2023, vol. 210, issue C, 258-268

Abstract: It was found that the Na modification is beneficial to the synthesis of Ru single-atomic catalyst anchored on GONa, which was prepared by one-step hydrothermal process. Importantly, the strong metal-support interaction facilitates the electron transfer from Ru SA to GONa via d-π conjugation, thus lowering the electron density of Ru SA. Experimental results and DFT calculations confirmed that the low electron density of Ru SA can significantly weaken the absorption of H* intermediates and simultaneously accelerate the desorption of generated H2 from catalyst surface. As a result, the Ru SA/GONa displayed exceptional HER activity with an extremely low over-potential of 20 mV at 10 mA cm−2, outperforming the benchmark commercial Pt (21 mV over-potential) and Ru nanoparticles (212 mV over-potential) catalysts. When Eosin Y was employed as a light harvester, this Ru SA/GONa achieves outstanding photocatalytic hydrogen production with a record-high apparent quantum efficiency of 65.2% at 520 nm. Moreover, single-atomic Pt, Pd, Au and Rh were also successfully anchored on the Na-functionalized GO support, suggesting the universality of Na-induced single-atomic synthesis. This work not only provides an effective method for the synthesis of single-atomic metal catalysts but also establishes the connection between the electronic structures of catalyst and performances.

Keywords: Ruthenium; Single atom; Hydrogen production; Photocatalysis (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:210:y:2023:i:c:p:258-268

DOI: 10.1016/j.renene.2023.03.136

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