Pt nanowire/Ti3C2Tx-CNT hybrids catalysts for the high performance oxygen reduction reaction for high temperature PEMFC

• Published in: International journal of hydrogen energy Vol. 45; no. 52; pp. 28190 - 28195
• Main Authors: Wang, Ranran, Chang, Zhou, Fang, Zhongwei, Xiao, Tao, Zhu, Zuolei, Ye, Bin, Xu, Chenxi, Cheng, Jigui
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 23.10.2020
• Subjects: High temperature proton exchange membrane fuel cells; Hybrid catalytic support; MXene; Pt nanowire; High temperature proton exchange membrane fuel cells; Hybrid catalytic support; Pt nanowire; MXene
• ISSN: 0360-3199; 1879-3487
• DOI: 10.1016/j.ijhydene.2020.03.068

The activity of catalyst could be enhanced by the temperature rising, so it is a suitable way to reduce the noble metal loading for the catalyst. However, the corrosion of carbon supports will be remarkable in the high temperature proton exchange membrane fuel cells (HT-PEMFC, >100 °C). This report demonstrated a novel Ti3C2Tx and CNT hybrid material as the catalytic support, and Pt nanowires (Pt NWs) is loaded on the hybrid support to construct the catalyst for HT-PEMFC. The Pt NWs/Ti3C2Tx-CNT performs higher electrochemical activity, better stability than that of commercial Pt/C. The mass activity and specific activity of Pt NWs/Ti3C2Tx-CNT catalysts are 3.89 and 3.02 times as that of Pt/C, respectively. The power densities of HT-PEMFC showed 155.4 mW cm−2 and 182 mW cm−2 at 150 and 180 °C, respectively. •The mass activity of Pt NWs/Ti3C2Tx-CNT is 3.89 times as that of Pt/C.•The catalyst superior performance is mainly ascribed to the synergistic effect.•The peak power density based on Pt NWs/Ti3C2Tx-CNT achieves 182 mW cm-2 at 180 °C.