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Article Abstract
Widely used catalysts for electrocatalytic hydrogen (H) evolution reaction (HER) have high platinum (Pt) contents and show low efficiencies in neutral and alkaline solutions. Herein, a carbon nanotube (CNT) supported Pt catalyst (Pt/CNT45) with 1 wt.% Pt is fabricated. For HER, the mass activity of Pt/CNT45 in acidic (18.76 A mg ), neutral (3.92 A mg ), and alkaline (3.88 A mg ) solutions is respectively much higher than those on commercial Pt/C catalyst with 20 wt.% Pt (acidic: 0.31 A mg , neutral: 0.03 A mg , alkaline: 0.07 A mg ). Thus, Pt/CNT45 enhances HER not only in acidic solutions but also in neutral and alkaline solutions. Pt at Pt-CNT interface on Pt/CNT45 promotes water (HO) dissociation and hydroxyl (OH) desorption from Pt/CNT45, thus enhancing HER. This work opens a new way for enhancing HER in a wider pH range by catalyst with low Pt content, and helpful for commercialization.
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