Abstract
Hydrogen is considered a clean and sustainable alternative energy source in future, and transition metal phosphides as substitutes for Pt-based electrocatalysts for the hydrogen evolution reaction (HER) have received widespread attention. However, exploring a facile way to synthesize efficient catalysts is still a challenge. In this work, we found a simple and safe way to obtain tungsten phosphide (WP) and the influence of synthesis temperature was also investigated. Moreover, with the modification of Ketjen Black, WP/KB heterostructures were gained, which showed an excellent HER performance in both acidic and alkaline solutions with Tafel slopes of 60 mV dec−1 and 66 mV dec−1, respectively. Furthermore, a possible improvement mechanism was also discussed.
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