One-Nanometer-Thick Pt3Ni Bimetallic Alloy Nanowires Advanced Oxygen Reduction Reaction: Integrating Multiple Advantages into One Catalyst

By Mingxing Gong, Z. Deng, Dongdong Xiao, Lili Han, Tonghui Zhao, Yun Lu, Tao Shen, Xupo Liu, Ruoqian Lin, Ting Huang and 3 more. ACS Catalysis, 2019

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Developing highly active as well as durable oxygen reduction reaction (ORR) electrocatalysts are still imperative for clean and efficient energy conversion device, such as fuel cells and metal-air battery. For this purpose and maximize the utilization of noble Pt, we present here a facile, yet scalable strategy for the high-precise synthesis of 1-nm-thick Pt3Ni bimetallic alloy nanowires (Pt3Ni BANWs). The seed-mediated growth mechanism of Pt3Ni BANWs was identified subsequently. As expected, the Pt3Ni BANWs delivered enhanced mass activity (0.546 A mgPt–1, exceeding the 2020 target of DOE) in comparison to Pt nanowires assembly (Pt NWA, 0.098 A mgPt–1) and Pt/C (Pt, 0.135 A mgPt–1), because of the rational integration of multiple compositional and structural advantages. Moreover, the Pt3Ni BANWs displayed enhanced durability (37% MA retention) than Pt NWA and Pt after 50 000 potential cycles. All these results indicate that the ultrathin Pt3Ni BANWs are potential candidates for catalyzing ORR with accept...

Subfields: Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/fce4aa270826530c2d06f160b909c8f091a16173