Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 305, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2021.121043
Keywords
Metal-organic frameworks; Ruthenium di-phosphide; DFT calculation; Hydrogen evolution reaction; Yolk-shell structure
Funding
- National Natural Science Foundation of China, China [21801005, 21901008, 22075223]
- Scientific and Technological Project of Henan Province, China [192102310232]
- Initiation Funds for Postdoctoral Scientific Research Projects in Henan Province, China [1901020]
- Hubei Natural Science Foundation, China [2020CFB774]
- Foundation of 'Domestic visiting scholar program (2018-2019) for young backbone teachers from Colleges and universities in central and Western China, China'
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Highly effective and durable electrocatalysts for universal-pH hydrogen evolution reaction (HER) have been achieved by designing and synthesizing ruthenium di-phosphide (RuP2) confined in carbon layers with a unique yolk-shell structure. The catalyst exhibits excellent HER performance surpassing that of Pt catalysts, with high stability.
Hydrogen generation from electrical water splitting has become a greatly increasing requirement for energy systems, however, highly effective and durable electrocatalysts towards universal-pH hydrogen evolution reaction (HER) remain a big challenge. Herein, we design and synthesize ruthenium di-phosphide (RuP2) confined in carbon layers (RuP2-C) with a unique yolk-shell structure (RuP2-C@RuP2-C) from MOF. As expected, it not only exceeds the HER activity of Pt catalysts, with very tiny overpotentials at 10 mA cm(-2) (9 and 17 mV in 1.0 M KOH and 0.5 M H2SO4, individually), but also has high stability. Besides, it also exhibits a low overpotential (40 mV) close to Pt catalysts and high stability in 1.0 M PBS, indicating that RuP2-C@RuP2-C (RPC@RPC) owns outstanding HER performance at all pH values. Density functional theory (DFT) calculation results further unravel that the P-site on the surface of RPC@RPC possesses low hydrogen adsorption energy, beneficial for boosting the HER activity.
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