High-Valence-State NiO/Co3O4 Nanoparticles on Nitrogen-Doped Carbon for Oxygen Evolution at Low Overpotential

作者：Tahir Muhammad; Pan Lun; Zhang Rongron; Wang Yi Cheng; Shen Guoqiang; Aslam Imran; Qadeer M A; Mahmood Nasir; Xu Wei; Wang Li; Zhang Xiangwen; Zou Ji Jun^*

来源：ACS Energy Letters, 2017, 2(9): 2177-2182.

DOI：10.1021/acsenergyfett.7b00591

The electrocatalytic oxygen evolution reaction (OER) plays a critical role in sustainable energy conversion and storage, but OER is severely hampered owing to the lack of highly efficient catalysts. Here, we report an efficient electrocatalyst, with NiO/Co3O4 nanoparticles decorated on nitrogen -doped carbon (NiO/Co3O4@ NC). Abundant high -valence Ni3+ and Co3+ species were observed on the surface of the hybrid due to the strong NC-metal oxide and NiO-Co3O4 interactions. This unique structure leads to excellent OER performance, delivering a very low overpotential of 240 mV(&10 mA"cm(-2) on glassy carbon and 200 mV(&10 mA"cm(-2) on Ni foam in KOH and having a turnover frequency (@350 mV overpotential) 6 and 16 times higher than that of IrO, and RuO2, respectively.

• 出版日期2017-9
• 单位天津大学