Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 261, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118240
Keywords
Large current density; B-doping; Amorphization of crystalline LDH; HER catalyst
Funding
- National Natural Science Foundation of China [51672049, 51871060, 51831009]
- Recruitment Program of Global Youth Experts
- China Postdoctoral Science Foundation [2018M640337]
- FDUROP (Fudan's Undergraduate Research Opportunities Program)
- University Student Innovation Program of Shanghai
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Developing a platinum-free hydrogen evolution reaction (HER) electrocatalyst that can steadily drive a large current density is of great significance in a commercially electrochemical water splitting technology. Herein, we show that the B-doping-induced amorphization of crystalline layered double hydroxide (LDH) activates it as an extremely efficient HER catalyst. The amorphous B-incorporated nickel-cobalt LDH supported on the nickel foam (A-NiCo LDH/NF) can yield large current densities at small overpotentials (100 mA cm(-2) at 151 mV, 500 mA cm(-2) at 286 mV, and 1000 mA cm(-2) at 381 mV) with high durability in alkaline medium even after 72 h, which is even better than commercial platinum. This work may provide a promising way for structure tuning of transition metal LDH to effectively boost HER efficiency towards practical water electrolysis.
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