Oxygen reduction reaction (ORR) is of great interest in various areas, including energy conversion. This paper presents the simple synthesis and characterization of one-dimensional silver halides nanowires (AgClNW and AgBrNW) as an electrocatalyst for ORR in alkaline media, as well as an investigation of the ORR pathway at AgCl. AgClNW and AgBrNW were prepared via a galvanic replacement reaction (GRR) between silver nanowires (AgNW) and a halide precursor. AgClNW exhibited excellent ORR catalytic activity that was comparable to or better than that for commercial Pt (20 wt% Pt loading on Vulcan carbon), demonstrating potential to replace Pt-based catalysts. A scanning electrochemical microscopy (SECM) analysis supports the existence of an associative ORR pathway at AgCl, and first-principles density functional theory (DFT) calculations suggest that the high ORR activity of AgCl is possibly attributed to the up-shifted Ag d-band center energy in AgCl as well as the assistance of adsorbed water molecules.

氧还原反应（ORR）在包括能量转换在内的各个领域都引起了极大的兴趣。本文介绍了一维卤化银纳米线（AgClNW和AgBrNW）作为碱性介质中ORR的电催化剂的简单合成和表征，以及在AgCl上的ORR途径的研究。AgClNW和AgBrNW是通过银纳米线（AgNW）与卤化物前体之间的电置换反应（GRR）制备的。AgClNW表现出优异的ORR催化活性，可与商业Pt媲美或更好（在Vulcan碳上载有20 wt％的Pt），证明有替代Pt基催化剂的潜力。扫描电化学显微镜（SECM）分析支持在AgCl处存在关联的ORR途径，