Journal Article

An integrated platinum-nanocarbon electrocatalyst for efficient oxygen reduction

Xia, Chenfeng, Yang, Cheng-Chieh, Dong, Chung-Li, Huang, Lei, Qi, Ruijuan, Li, Fu-Min, Wei, Min, Chen, Chao, Dang, Dai, You, Bo, Zaman, Shahid, Xia, Bao Yu

2022

Overview

Efficient and robust platinum-carbon electrocatalysts are of great significance for the long-term service of high-performance fuel cells. Here, we report a Pt alloy integrated in a cobalt-nitrogen-nanocarbon matrix by a multiscale design principle for efficient oxygen reduction reaction. This Pt integrated catalyst demonstrates an increased mass activity, 11.7 times higher than that of commercial Pt catalyst, and retains a stability of 98.7% after 30,000 potential cycles. Additionally, this integrated catalyst delivers a current density of 1.50 A cm −2 at 0.6 V in the hydrogen-air fuel cell and achieves a power density of 980 mW cm −2 . Comprehensive investigations demonstrate that the synergistic contribution of components and structure in the platinum-carbon integrated catalyst is responsible for the high-efficiency ORR in fuel cells. Improving fuel cell technologies based on Pt-based alloys is important for efficient fuel cells. Here, the authors report a hybrid PtCo alloy electrocatalyst for acidic oxygen reduction at high current densities and H 2 /air fuel cell power densities.

• Publisher: Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
• Subject: 119/118 / 140/133 / 140/146 / 147/135 / 147/137 / 147/143 / 639/301/299 / 639/4077/893 / 639/638/161/893 / 639/638/77/884 / 639/925/357 / Alloys / Carbon / Catalysts / Chemical reduction / Cobalt / Current density / Electrocatalysts / Fuel cells / Fuel technology / Humanities and Social Sciences / Hydrogen oxygen fuel cells / multidisciplinary / Oxygen / Oxygen reduction reactions / Platinum / Platinum base alloys / Science / Science (multidisciplinary)