Engineering Pt Coordination Environment with Atomically Dispersed Transition Metal Sites Toward Superior Hydrogen Evolution

Haiyan Jin; Miran Ha; Min Gyu KimJong Hoon LeeKwang S. Kim

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Engineering Pt Coordination Environment with Atomically Dispersed Transition Metal Sites Toward Superior Hydrogen Evolution

机译：Engineering Pt Coordination Environment with Atomically Dispersed Transition Metal Sites Toward Superior Hydrogen Evolution

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Metal single-atom (SA) catalysts have attracted immense attention due tothe high catalytic efficiency given by the desired coordination environmentof each metal atom. Yet, engineering the local electronic structure of SAs andmulti-atoms (MAs) still remains a challenge. Herein, an atomically dispersedcatalyst comprised of Pt SAs, Pt-Pt/V dual-atoms, and small clusters supportedon a vanadium and nitrogen co-doped carbon (VNC) (denoted as Pt@VNC) surface is synthesized. In the Pt@VNC, both V and Pt atoms are evenlydistributed on the surface of N-doped carbon, while a few Pt atoms are linkedto other Pt atoms via V, forming Pt clusters. The coordination structures of Ptatoms are modulated upon introducing atomically dispersed V sites (whichgenerate small-sized Pt clusters) and V_2O_5 clusters, showing extraordinaryactivity for the hydrogen evolution reaction (HER). Benefiting from the lowcharge transfer resistance, i.e., fast reaction kinetics, due to the synergisticeffect of SAs and clusters, the Pt@VNC demonstrates superior catalyticefficiency and robust durability for the HER. It requires an overpotential ofonly 5 mV at a current density of 10 mA cm~(?2) and shows 15 times larger massactivity than the commercial 20 wt.% Pt/C catalyst. This novel catalyst-designstrategy paves a new way for maximizing catalytic efficiency by optimizing thecoordination structure of metal atoms.

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《Advanced energy materials》 |2023年第11期|2204213.1-2204213.8|共8页
作者
Haiyan Jin; Miran Ha; Min Gyu KimJong Hoon LeeKwang S. Kim;
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作者单位

Center for Superfunctional MaterialsDepartment of ChemistryUlsan National Institute of Science and Technology (UNIST)50 UNIST-gil, Ulsan 44919, Republic of Korea;

Beamline Research DivisionPohang Accelerator Laboratory (PAL)Pohang 37673, Republic of Korea;

Center for Superfunctional MaterialsDepartment of ChemistryUlsan National Institute of Science and Technology (UNIST)50 UNIST-gil, Ulsan 44919, Republic of Korea,UNIST Central Research Facilities (UCRF)Ulsan National Institute of Science and Engineering (;

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正文语种英语
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dual atom catalysts; hydrogen evolution; platinum; single atom catalysts; vanadium;

Engineering Pt Coordination Environment with Atomically Dispersed Transition Metal Sites Toward Superior Hydrogen Evolution

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