Abstract
Direct formic acid fuel cells (DFAFCs) are a promising clean power source. To date, palladium (Pd)-based catalysts are the best promising anode catalyst for DFAFCs due to its high anti-poisoning ability and low cost. In this paper, we report a high-efficiency stable PdHx nanocatalyst towards DFAFCs. The PdHx nanocatalysts are prepared by simply treating the commercial Pd black with n-butylamine at relative low temperature (100–200°C). They are extremely stable, and the as-prepared PdH0.43 nanocatalysts show extremely low overpotential for formic acid electrooxidation, with an oxidation peak potential of 0.04V versus SCE (saturated calomel electrode). Meanwhile, the PdH0.43 exhibits as high as 3 times mass activity, 5 times specific activity and great catalytic stability, compared with the untreated commercial Pd black. The present strategy offers a convenient way to boost the performance of Pd nanocatalysts in DFAFCs.
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