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Carbon-Extraction-Induced Biaxial Strain Tuning of Carbon-Intercalated Iridium Metallene for Hydrogen Evolution Catalysis

Authors :
Guo, Hongyu
Shi, Jia
Li, Lu
Han, Xiaocang
Shang, Changshuai
Luo, Heng
Cao, Xiaoqing
Tao, Lu
Tan, Hao
Gu, Yu
Qian, Zhengyi
Zhang, Wenyu
Luo, Mingchuan
Zhao, Xiaoxu
Guo, Shaojun
Source :
Nano Letters; February 2024, Vol. 24 Issue: 5 p1602-1610, 9p
Publication Year :
2024

Abstract

Metallene materials with atomic thicknesses are receiving increasing attention in electrocatalysis due to ultrahigh surface areas and distinctive surface strain. However, the continuous strain regulation of metallene remains a grand challenge. Herein, taking advantage of autocatalytic reduction of Cu2+on biaxially strained, carbon-intercalated Ir metallene, we achieve control over the carbon extraction kinetics, enabling fine regulation of carbon intercalation concentration and continuous tuning of (111) in-plane (−2.0%–2.6%) and interplanar (3.5%–8.8%) strains over unprecedentedly wide ranges. Electrocatalysis measurements reveal the strain-dependent activity toward hydrogen evolution reaction (HER), where weakly strained Ir metallene (w-Ir metallene) with the smallest lattice constant presents the highest mass activity of 2.89 A mg–1Irat −0.02 V vs reversible hydrogen electrode (RHE). Theoretical calculations validated the pivotal role of lattice compression in optimizing H binding on carbon-intercalated Ir metallene surfaces by downshifting the d-band center, further highlighting the significance of strain engineering for boosted electrocatalysis.

Details

Language :
English
ISSN :
15306984 and 15306992
Volume :
24
Issue :
5
Database :
Supplemental Index
Journal :
Nano Letters
Publication Type :
Periodical
Accession number :
ejs65322560
Full Text :
https://doi.org/10.1021/acs.nanolett.3c04236