Energy & Environmental Science
01 September 2022, Issue 9,
Page 3539 to 4002
A carbonization/interfacial assembly-driven electroplating approach for water-splitting textile electrodes with remarkably low overpotentials and high operational stability
A key requirement for realizing highly efficient commercial water-splitting devices is to develop non-noble metal-based electrodes that can generate a large amount of hydrogen fuels with low overpotentials and high operational stability. Herein, we introduce high-performance water-splitting electrodes (WSEs) with extremely low overpotentials and unprecedently high operation stability via a carbonization/interfacial assembly-induced electroplating approach. To this end, silk textiles were first converted to carboxylic acid-functionalized conductive textiles using carbonization and subsequent acid treatment. Then, amine linkers were assembled onto the conductive textiles to achieve favorable interfacial interactions with electrocatalysts. For a hydrogen evolution reaction (HER) electrode, Ni was electroplated onto the interface-modified textile, while to prepare an oxygen evolution reaction (OER) electrode, NiFeCo was additionally electroplated onto the Ni-electroplated textile. These HER and OER electrodes exhibited extremely low overpotentials in alkaline media (12 mV at 10 mA cmโ2 for the HER and 186 mV at 50 mA cmโ2 for the OER), outperforming the conventional non-noble metal-based electrodes. Additionally, the overall-water-splitting reaction of full-cell electrodes was stably maintained at a remarkably high current density of 2000 mA cmโ2 and a low cell voltage of 1.70 V. We believe that our approach can provide a basis for developing commercially available high-performance WSEs.
- Jeongmin Mo
- Younji Ko
- Young Soo Yun
- June Huhย
- Jinhan Cho ย
Energy & Environmental Science ย Home-The home of agenda-setting research tackling key challenges to ensure energy provision and protect our environment.<br/><br/>Editorial Board Chair: Joseph Hupp<br/>Impact factor: 39.714<br/>Time to first decision (peer reviewed only): 42 days<br/> (rsc.org)
Image created by minjeong Kim / Nanosphere
Energy & Environmental Science
01 September 2022, Issue 9,
Page 3539 to 4002
A carbonization/interfacial assembly-driven electroplating approach for water-splitting textile electrodes with remarkably low overpotentials and high operational stability
A key requirement for realizing highly efficient commercial water-splitting devices is to develop non-noble metal-based electrodes that can generate a large amount of hydrogen fuels with low overpotentials and high operational stability. Herein, we introduce high-performance water-splitting electrodes (WSEs) with extremely low overpotentials and unprecedently high operation stability via a carbonization/interfacial assembly-induced electroplating approach. To this end, silk textiles were first converted to carboxylic acid-functionalized conductive textiles using carbonization and subsequent acid treatment. Then, amine linkers were assembled onto the conductive textiles to achieve favorable interfacial interactions with electrocatalysts. For a hydrogen evolution reaction (HER) electrode, Ni was electroplated onto the interface-modified textile, while to prepare an oxygen evolution reaction (OER) electrode, NiFeCo was additionally electroplated onto the Ni-electroplated textile. These HER and OER electrodes exhibited extremely low overpotentials in alkaline media (12 mV at 10 mA cmโ2 for the HER and 186 mV at 50 mA cmโ2 for the OER), outperforming the conventional non-noble metal-based electrodes. Additionally, the overall-water-splitting reaction of full-cell electrodes was stably maintained at a remarkably high current density of 2000 mA cmโ2 and a low cell voltage of 1.70 V. We believe that our approach can provide a basis for developing commercially available high-performance WSEs.
Energy & Environmental Science ย Home-The home of agenda-setting research tackling key challenges to ensure energy provision and protect our environment.<br/><br/>Editorial Board Chair: Joseph Hupp<br/>Impact factor: 39.714<br/>Time to first decision (peer reviewed only): 42 days<br/> (rsc.org)
Image created by minjeong Kim / Nanosphere