Cold-plasma technique enabled supported Pt single atoms with tunable coordination for hydrogen evolution reaction

Jing Li, Yanan Zhou, Weijing Tang, Jian Zheng, Xiaoping Gao, Ning Wang, Xiao Chen, Min Wei, Xin Xiao, Wei Chu

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Coordination tunability of the single-atom catalysts (SACs) is an essential but challenging issue for the catalyst sifting and structure-activity relationship analysis. Herein, Pt single atoms with tunable coordination are readily achieved via a facile cold-plasma technique by changing the gas type (N2, Ar, or Air) and treatment duration. Combining with density functional theory calculation, the Pt-N coordination concentration is predicted to be highly correlated with adsorption free energy of H* atoms (ΔGH*) for the hydrogen evolution reaction (HER), which is further validated experimentally. Remarkably, the sample with N, O co-dopant introduced by air plasma exhibits a high TOF of ∼13 H2 s−1 at 40 mV, and outstanding mass activity of 7.41 A mg−1Pt for HER, which is 26.5 times of commercial Pt/C catalyst. The enhanced performance might originate from the optimized electronic structure of active carbon site with moderate electron transfer and p-band center, which enables a suitable binding strength with H* and thus a near-zero ΔGH*.
Original languageEnglish (US)
Pages (from-to)119861
JournalApplied Catalysis B: Environmental
Volume285
DOIs
StatePublished - Dec 2020

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