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<p>The viable commercial application of electrocatalysis requires a simple, scalable and cost-effective catalyst preparation that delivers stability and high catalytic activity. This study has established an in situ synthesis of an ultra-low gold (Au) loading, self-supporting catalyst, which is used to promote the hydrogen evolution reaction (HER) in acidic media. The electrodes were fabricated using a drop-coating process, in which self-supporting catalyst precursor solutions were directly deposited on graphite substrates. The resultant catalysts exhibit an ultra-low Au loading without the use of binders or conductive additives. Enhanced electrocatalytic performance is associated with structural defects, and catalyst stability is demonstrated in HER testing. The synthesized catalysts exhibited stable operation in tests exceeding 24&#xa0;h, supporting further evaluation for practical applications.</p><p><b>Trial registration number:</b> Not applicable.</p>

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In situ preparation of an ultra-low Au loading self-supporting catalyst: application in acidic hydrogen production

  • 期刊论文

  • 发表日期：

    2026年7月28日

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  • Xiao-Fan Yang,
  • Yan Yan,
  • Yu-Xin Bai,
  • Zhan-Hong Cao,
  • Ting-Ting Liu,
  • Xiao-Lan Ge

摘要

The viable commercial application of electrocatalysis requires a simple, scalable and cost-effective catalyst preparation that delivers stability and high catalytic activity. This study has established an in situ synthesis of an ultra-low gold (Au) loading, self-supporting catalyst, which is used to promote the hydrogen evolution reaction (HER) in acidic media. The electrodes were fabricated using a drop-coating process, in which self-supporting catalyst precursor solutions were directly deposited on graphite substrates. The resultant catalysts exhibit an ultra-low Au loading without the use of binders or conductive additives. Enhanced electrocatalytic performance is associated with structural defects, and catalyst stability is demonstrated in HER testing. The synthesized catalysts exhibited stable operation in tests exceeding 24 h, supporting further evaluation for practical applications.

Trial registration number: Not applicable.