Anchoring Au nanoparticles on Bi ultrathin nanosheets for use as an efficient heterogeneous catalyst for ambient-condition electrochemical ammonia synthesis
Literature Information
You Xu, Tianlun Ren, Shanshan Yu, Kaili Ren, Mingzhen Wang, Ziqiang Wang, Xiaonian Li, Liang Wang, Hongjing Wang
The electrochemical nitrogen reduction reaction (NRR) represents an emerging alternative for realizing ammonia (NH3) synthesis from earth-abundant N2 under ambient conditions. In this work, we describe the fabrication of a two-component heterogeneous composite composed of Au nanoparticles anchored on Bi nanosheets (denoted as Au/Bi NSs) and demonstrate their efficient performance for NRR electrocatalysis. The Au/Bi NSs are readily obtained by in situ electrochemical conversion of the pre-synthesized composite precursors composed of Au nanoparticles anchored on BiOCl nanoplates. Benefitting from the synergistic effect of Bi and Au components, the resultant Au/Bi NSs exhibit efficient NRR electrocatalytic activity in N2-saturated 0.1 M HCl solution, achieving a NH3 yield rate of 20.39 μg h−1 mgcat.−1 and a faradaic efficiency of 15.53% at −0.3 V (vs. the reversible hydrogen electrode). This research may motivate further study of electrocatalytic N2-to-NH3 conversion and open up new opportunities for the synthesis of other heterogeneous catalysts.
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