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Interfacial water engineering boosts neutral water reduction.
- Source :
- Nature Communications; 10/21/2022, Vol. 13 Issue 1, p1-11, 11p
- Publication Year :
- 2022
-
Abstract
- Hydrogen evolution reaction (HER) in neutral media is of great practical importance for sustainable hydrogen production, but generally suffers from low activities, the cause of which has been a puzzle yet to be solved. Herein, by investigating the synergy between Ru single atoms (RuNC) and RuSe<subscript>x</subscript> cluster compounds (RuSe<subscript>x</subscript>) for HER using ab initio molecular dynamics, operando X-ray absorption spectroscopy, and operando surface-enhanced infrared absorption spectroscopy, we establish that the interfacial water governs neutral HER. The rigid interfacial water layer in neutral media would inhibit the transport of H<subscript>2</subscript>O*/OH* at the electrode/electrolyte interface of RuNC, but the RuSe<subscript>x</subscript> can promote H<subscript>2</subscript>O*/OH* transport to increase the number of available H<subscript>2</subscript>O* on RuNC by disordering the interfacial water network. With the synergy of RuSe<subscript>x</subscript> and RuNC, the resulting neutral HER performance in terms of mass-specific activity is 6.7 times higher than that of 20 wt.% Pt/C at overpotential of 100 mV. Understanding the slow kinetics of hydrogen evolution reaction in neutral media is of fundamental importance for the rational design of high-performance electrocatalysts for hydrogen energy. Here, by studying Ru single atom and RuSe<subscript>x</subscript> cluster, the authors report how the rate of hydrogen evolution reaction activity in neutral media is governed by interfacial water. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 13
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 159838808
- Full Text :
- https://doi.org/10.1038/s41467-022-33984-5