Synergy of Platinum Single Atoms and Platinum Atomic Clusters on Sulfur-Doped Titanium Nitride Nanotubes for Enhanced Hydrogen Evolution Reaction

被引：22

作者：

Yan, Jing ^{[1
,2
]}

Xi, Zichao ^{[1
,2
]}

Cong, Linlin ^{[3
]}

Lv, Kun ^{[1
,2
]}

Xin, Ruiyun ^{[1
,2
]}

Cao, Bo ^{[1
,2
]}

Liu, Baocang ^{[1
,2
]}

He, Jinlu ^{[1
,2
]}

Zhang, Jun ^{[1
,2
,4
]}

机构：

[1] Inner Mongolia Univ, Sch Chem & Chem Engn, 49 Xilinguole South Rd, Hohhot 010020, Peoples R China

[2] Inner Mongolia Univ, Inner Mongolia Engn & Technol Res Ctr Catalyt Con, 49 Xilinguole South Rd, Hohhot 010020, Peoples R China

[3] China North Ind Grp, Inst 52, 4 Hudemulin Rd, Baotou 014034, Peoples R China

[4] Inner Mongolia Acad Sci & Technol, 70 Zhaowuda Rd, Hohhot 010010, Peoples R China

来源：

SMALL | 2022年 / 18卷 / 51期

基金：

中国国家自然科学基金;

关键词：

hydrogen evolution reaction; monolithic electrodes; platinum atomic clusters; platinum single atoms; sulfur-doped titanium nitride nanotubes; synergistic effect; PERFORMANCE; NANOSHEETS; ARRAYS; CARBON; ELECTRODES; CATALYSTS; TIS2; ELECTROCATALYSTS; DISULFIDE; MEDIA;

D O I：

10.1002/smll.202205603

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Highly dispersed Pt, such as Pt single atoms and atomic clusters, has great potential in the electrocatalytic hydrogen evolution reaction (HER) due to the high atomic efficiency and unique electronic configuration. Rationally regrating the electronic structure of Pt catalysts is desirable for promoting the HER performance. Herein, a 3D self-supported monolithic electrode consisting of Pt single atoms (Pt-SAs) and Pt atomic clusters (Pt-ACs) anchored on sulfur-doped titanium nitride nanotubes (S-TiN NTs) encapsulated in polyaniline (PANI) on Ti mesh (PANI@Pt/S-TiN NTs/Ti) via a facile electrochemical strategy for efficient HER is designed and synthesized. Contributed by the unique structure and composition and the synergy of Pt-SAs, Pt-ACs and S-TiN NTs, the PANI@Pt/S-TiN NTs/Ti electrode exhibits ultrahigh HER activities with only 12, 25 and 39 mV overpotentials at -10 mA cm(-2) in acidic, alkaline and neutral media, respectively, and can maintain a stable performance for 25 h. Impressively, the mass activities are respectively up to 26.1, 22.4, and 17.7 times as that of Pt/C/CC electrode. Theoretical calculation results show that the synergistic effect of Pt-SAs, Pt-ACs, and S-TiN NTs can optimize the electronic structure of Pt and generate multiple active sites with a thermodynamically favorable hydrogen adsorption free energy (Delta G(H*)), thereby resulting in an enhanced HER activity.

引用

页数：13

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