通过磷酸根离子功能化提高NiFeO纳米片的析氧反应活性

Boosting the Oxygen Evolution Reaction Activity of NiFeO Nanosheets by Phosphate Ion Functionalization.

作者信息

Chen Qiang, Wang Rui, Lu Fengqi, Kuang Xiaojun, Tong Yexiang, Lu Xihong

机构信息

MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials, Guangxi Universities Key Laboratory of Non-ferrous Metal Oxide Electronic Functional Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, P. R. China.

MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chem & Energy Conservation of Guangdong Province, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China.

出版信息

ACS Omega. 2019 Feb 18;4(2):3493-3499. doi: 10.1021/acsomega.8b03081. eCollection 2019 Feb 28.

Here, we demonstrate an effective strategy to constitutionally increase the conductivity and electrocatalytic property of NiFeO by phosphate ion functionalization. The phosphate-ion-modified NiFeO (P-NiFeO) nanosheets are readily grown on a carbon cloth by a simple hydrothermal method and followed by a phosphating process. The introduction of phosphate ions on the NiFeO surface is highly beneficial for increasing the charge transport rate and electrocatalytic active sites. As a result, the as-prepared P-NiFeO nanosheets show outstanding electrocatalytic activity toward oxygen evolution reaction (OER), with a low overpotential (231 mV at 10 mA/cm) and Tafel slope (49 mV/dec). Furthermore, the P-NiFeO electrode has a remarkable stability with no activity fading after 50 h. In addition, the as-fabricated water electrocatalysts exhibit excellent flexibility at the foldable state. These features make the phosphate-ion-functionalized NiFeO electrodes open a new way to develop OER electrocatalysts with high electrochemical property.

在此，我们展示了一种通过磷酸根离子功能化从本质上提高NiFeO的导电性和电催化性能的有效策略。磷酸根离子修饰的NiFeO（P-NiFeO）纳米片通过简单的水热法在碳布上轻松生长，随后进行磷化处理。在NiFeO表面引入磷酸根离子对于提高电荷传输速率和电催化活性位点非常有益。结果，所制备的P-NiFeO纳米片对析氧反应（OER）表现出出色的电催化活性，具有低过电位（在10 mA/cm²时为231 mV）和塔菲尔斜率（49 mV/dec）。此外，P-NiFeO电极具有显著的稳定性，在50小时后没有活性衰减。此外，所制备的水电催化剂在可折叠状态下表现出优异的柔韧性。这些特性使磷酸根离子功能化的NiFeO电极开辟了一条开发具有高电化学性能的OER电催化剂的新途径。