Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 10, Issue 20, Pages 10990-10997Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta01307j
Keywords
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Funding
- National Natural Science Foundation of China [51902309]
- Natural Science Foundation of Fujian Province, China [2021J05096, 2021J01520]
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China [2021ZR102]
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In this study, a large-scale WP-W2C electrocatalyst with a nanoporous network structure was successfully fabricated, which exhibited excellent catalytic stability and activity in the hydrogen evolution reaction. It shows great potential for industrial applications.
A nanoporous structure can highly expose active atomic sites and has excellent electrolyte/electrode interface mass transport characteristics, which plays an important role in the design of high-performance hydrogen evolution reaction (HER) catalysts. In this work, we fabricate a large-scale WP-W2C electrocatalyst with a nanoporous network structure. The SEM results suggest that the introduction of the P precursor not only decreases the synthesis temperature of W2C but also enlarges the pores of the nanoporous network appropriately. Surprisingly, the self-supported nanoporous feature with a small water contact angle provides this seamless electrode a mechanically-robust and more convenient gas transport channel, facilitating the electron transfer and the formation and release of H-2 bubbles. The WP-W2C nanoporous network presents excellent catalytic stability and activities with low overpotentials of 560 mV and 449 mV at a current density of 1000 mA cm(-2) in 1.0 M KOH at 25 degrees C and 70 degrees C, respectively, and the electrode also displays outstanding HER performance in 5.0 M KOH, which satisfies the demand of the industrial application.
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