Silver Nanowire Aerogel Support Promotes Stable Hydrogen Evolution Reaction at High Current Density

Chunyan Zuo; Guohua Tao; Liubiao Zhong; Gaowei Zhang; Bu Liu; Yejun Qiu

doi:10.1021/acsami.4c12131

Silver Nanowire Aerogel Support Promotes Stable Hydrogen Evolution Reaction at High Current Density

ACS Appl Mater Interfaces. 2024 Oct 9. doi: 10.1021/acsami.4c12131. Online ahead of print.

Authors

Chunyan Zuo¹, Guohua Tao², Liubiao Zhong¹, Gaowei Zhang^{1

3}, Bu Liu¹, Yejun Qiu^{1

4}

Affiliations

¹ Shenzhen Engineering Lab of Flexible Transparent Conductive Films, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China.
² School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen, 518055, China.
³ School of Chemistry and Chemical Engineering, Lingnan Normal University, Zhanjiang 524048, China.
⁴ Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China.

PMID: 39383249
DOI: 10.1021/acsami.4c12131

Abstract

The stability of electrocatalysts during the hydrogen evolution reaction (HER) is vital for efficient production of hydrogen energy. Herein, we demonstrate that silver nanowire aerogel-based support (AABS) could facilitate the construction of HER catalysts with extraordinary long-term stability. A full nanostructure catalyst of nickel phosphide based formed on AABS (Ni₂P-Ni₅P₄@AABS) was prepared to achieve an overpotential of 687 mV (without iR compensation) for HER at the current density of 1 A cm^-2 in 0.5 M H₂SO₄. Excitingly, the stable HER performance was kept for 42 days during the long-term stability (i-t) test at high current density (0.5-1 A cm^-2). The excellent HER performance of the Ni₂P-Ni₅P₄@AABS catalyst is attributed to rapid electron transport pathways, numerous more accessible active sites, and support induced enhanced catalytic activity. The support effect was highlighted by a proposed phenomenological two-channel model for electron transport, which provides fresh insights into the design strategy for energy storage and delivery.

Keywords: hydrogen evolution reaction; long-term stability; silver nanowire aerogel; support; without iR compensation.