Enhanced hydrogen evolution efficiency achieved by atomically controlled platinum deposited on gold nanodendrites with high-index surfaces

Ying Huang Lai, Sin Ren Li, Swathi M. G, Hsiao Tzu Chang, Yu Bin Huang, Yen Ken Li, Yu Mei Chen, Shivaraj B. Patil, Shu Yi Chang, Po Kai Chen, Chia Che Chang, Yi Chia Chen, Chih Wen Pao, Jeng Lung Chen, Chuan Yu Wei, I. Lin, Hung Lung Chou, Chun Jen Su, U. Ser Jeng, Tsung Rong KuoCheng Yen Wen, Di Yan Wang

Research output: Contribution to journalArticlepeer-review

Abstract

There have been several studies on the catalytic activity of the hydrogen evolution reaction (HER) using ultralow loading of Pt catalysts or even Pt single atom catalysts. However, Pt single atom deposited on the surface of the carbon or metal oxide material has some drawbacks, such as high possibility of Pt desorption from the supported material in the electrolyte. Besides, from the reaction mechanism perspective, each Pt atom in this type of catalyst is too far to achieve high HER efficiencyviathe Tafel reaction pathway. In this work, gold nanodendrites (Au NDs) with high facet surface were chosen as the supported materials for studying the relation between the low loading amount of Pt atoms and the reaction mechanism of the HER activity. The atomic deposition of Pt atoms on the surface of Au NDs can be controlled effectively using a constant-current synthetic method. It was found that the HER electrocatalytic activity of ultralow Pt loading catalyst, with Pt atoms to total surface atoms of Au NDs (O-Pt on Au NDs) of 5.5%, could achieve high efficiencyviathe Tafel reaction pathway, showing a low overpotential of ∼18 mV at a current density of 10 mA cm−2and a small Tafel slope of ∼31 mV dec−1, which is close to that of commercial Pt/C with 20 wt% Pt. As confirmed by Inductively Coupled Plasma Mass Spectrometry(ICP-MS), the Pt loading amount of O-Pt on Au NDs was ∼3.8 ± 0.2 μg cm−2on a physical area of carbon fiber paper. The turnover frequency (TOF) of O-Pt on Au NDs was found to be 40.1 ± 2.5 H2per s at 50 mV. This work provides a feasible approach to control the atomic deposition of Pt on a specific substrate as an active catalyst for various catalytic applications.

Original languageEnglish
Pages (from-to)22901-22912
Number of pages12
JournalJournal of Materials Chemistry A
Volume9
Issue number40
DOIs
Publication statusPublished - Oct 28 2021

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Enhanced hydrogen evolution efficiency achieved by atomically controlled platinum deposited on gold nanodendrites with high-index surfaces'. Together they form a unique fingerprint.

Cite this