Designing Highly Efficient and Long‐Term Durable Electrocatalyst for Oxygen Evolution by Coupling B and P into Amorphous Porous NiFe‐Based Material
作者:Fei Hu、Haiyun Wang、Yan Zhang、Xiaochen Shen、Guanghui Zhang、Yanbo Pan、Jeffrey T. Miller、Kun Wang、Shengli Zhu、Xianjin Yang、Chengming Wang、Xiaojun Wu、Yujie Xiong、Zhenmeng Peng
DOI:10.1002/smll.201901020
日期:2019.7
Oxygen evolution reaction (OER) is of great significance for hydrogen production via water electrolysis, which, however, demands development of highly active, durable, and cost‐effective electrocatalysts in order to stride into a renewable energy era. Herein, highly efficient and long‐term durable OER by coupling B and P into an amorphous porous NiFe‐based electrocatalyst is reported, which possesses
氧气析出反应(OER)对于通过水电解制氢的过程具有重要意义,然而,为了进入可再生能源时代,需要开发高度活性,耐用且具有成本效益的电催化剂。本文报道了通过将B和P耦合到非晶态多孔NiFe基电催化剂中而实现的高效且长期耐用的OER,它具有非晶态多孔金属本体结构和高耐腐蚀性,并克服了与当前使用的催化剂纳米材料相关的问题。如密度泛函理论计算所模拟,活化NiFePB(a-NiFePB)中的PB共掺杂使Fe和Ni都在费米能级上离域化,并增强了p-d杂化。因此,a-NiFePB的协调电子结构和独特的多孔框架提高了OER活性。因此,活化的NiFePB在收获10 mA cm时表现出极低的197 mV过电位计时电位法条件下,−2 OER电流密度和233 mV在达到100 mA cm -2时,Tafel斜率和谐地符合34 mV dec -1。这种新催化剂的令人印象深刻的长期稳定性可以通过在100 mA cm -2下运行1400