# Design of N-Coordinated Dual-Metal Sites: A Stable and Active Pt-Free Catalyst for Acidic Oxygen Reduction Reaction

“Design of N-Coordinated Dual-Metal Sites: A Stable and Active Pt-Free Catalyst for Acidic Oxygen Reduction Reaction” (2017), by Jing Wang et al. Energy research paper. Original abstract below, unchanged. No free PDF was found.

- Authors: Jing Wang, Zheng‐Qing Huang, Wei Liu, Chun‐Ran Chang, Haolin Tang, Zhijun Li, Wenxing Chen, Chun‐Jiang Jia, Tao Yao, Shiqiang Wei et al.
- Published: November 14, 2017
- Field: Energy
- DOI: https://doi.org/10.1021/jacs.7b10385
- Source: https://doi.org/10.1021/jacs.7b10385

## Abstract

We develop a host-guest strategy to construct an electrocatalyst with Fe-Co dual sites embedded on N-doped porous carbon and demonstrate its activity for oxygen reduction reaction in acidic electrolyte. Our catalyst exhibits superior oxygen reduction reaction performance, with comparable onset potential ( E onset, 1.06 vs 1.03 V) and half-wave potential ( E 1/2, 0.863 vs 0.858 V) than commercial Pt/C. The fuel cell test reveals (Fe,Co)/N-C outperforms most reported Pt-free catalysts in H 2 /O 2 and H 2 /air. In addition, this cathode catalyst with dual metal sites is stable in a long-term operation with 50 000 cycles for electrode measurement and 100 h for H 2 /air single cell operation. Density functional theory calculations reveal the dual sites is favored for activation of O-O, crucial for four-electron oxygen reduction.

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